From d941136fc6ead10a7ff319bad199869b593962c5 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Mon, 19 Mar 2012 10:31:58 -0600 Subject: gpio: tegra: configure pins during irq_set_type When a Tegra GPIO is used as an IRQ, it should be enabled as a GPIO (so the pinmux module isn't driving it as an output) and configured as a GPIO input (so the GPIO module isn't driving it as an output). Set this up automatically whenever an IRQ is requested, so that users of IRQs don't need to do this. Signed-off-by: Stephen Warren Acked-by: Olof Johansson --- drivers/gpio/gpio-tegra.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index 12f349b3830d..4383a7205349 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -224,6 +224,9 @@ static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type) spin_unlock_irqrestore(&bank->lvl_lock[port], flags); + tegra_gpio_mask_write(GPIO_MSK_OE(gpio), gpio, 0); + tegra_gpio_enable(gpio); + if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) __irq_set_handler_locked(d->irq, handle_level_irq); else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) -- cgit v1.2.3 From 3e215d0a19c2a0c389bd9117573b6dd8e46f96a8 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Sat, 18 Feb 2012 01:04:55 -0700 Subject: gpio: tegra: Hide tegra_gpio_enable/disable() Recent pinctrl discussions concluded that gpiolib APIs should in fact do whatever is required to mux a GPIO onto pins, by calling pinctrl APIs if required. This change implements this for the Tegra GPIO driver, and removes calls to the Tegra-specific APIs from drivers and board files. Cc: Chris Ball Cc: linux-mmc@vger.kernel.org Signed-off-by: Stephen Warren Acked-by: Chris Ball # for sdhci-tegra.c Acked-by: Linus Walleij Acked-by: Olof Johansson --- arch/arm/mach-tegra/board-dt-tegra20.c | 1 - arch/arm/mach-tegra/board-harmony-pinmux.c | 17 ------------- arch/arm/mach-tegra/board-paz00-pinmux.c | 14 ----------- arch/arm/mach-tegra/board-pinmux.c | 33 +++--------------------- arch/arm/mach-tegra/board-pinmux.h | 5 ---- arch/arm/mach-tegra/board-seaboard-pinmux.c | 32 ------------------------ arch/arm/mach-tegra/board-seaboard.c | 1 - arch/arm/mach-tegra/board-trimslice-pinmux.c | 12 --------- arch/arm/mach-tegra/include/mach/gpio-tegra.h | 9 ------- arch/arm/mach-tegra/usb_phy.c | 1 - drivers/gpio/gpio-tegra.c | 36 +++++++++++++-------------- drivers/mmc/host/sdhci-tegra.c | 24 ++++-------------- 12 files changed, 27 insertions(+), 158 deletions(-) (limited to 'drivers/gpio') diff --git a/arch/arm/mach-tegra/board-dt-tegra20.c b/arch/arm/mach-tegra/board-dt-tegra20.c index 0952494f481a..65a5249b3718 100644 --- a/arch/arm/mach-tegra/board-dt-tegra20.c +++ b/arch/arm/mach-tegra/board-dt-tegra20.c @@ -55,7 +55,6 @@ void ventana_pinmux_init(void); struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = { OF_DEV_AUXDATA("nvidia,tegra20-pinmux", TEGRA_APB_MISC_BASE + 0x14, "tegra-pinmux", NULL), - OF_DEV_AUXDATA("nvidia,tegra20-gpio", TEGRA_GPIO_BASE, "tegra-gpio", NULL), OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC1_BASE, "sdhci-tegra.0", NULL), OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC2_BASE, "sdhci-tegra.1", NULL), OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC3_BASE, "sdhci-tegra.2", NULL), diff --git a/arch/arm/mach-tegra/board-harmony-pinmux.c b/arch/arm/mach-tegra/board-harmony-pinmux.c index 1af85bccc0f1..3ebe2c859a3b 100644 --- a/arch/arm/mach-tegra/board-harmony-pinmux.c +++ b/arch/arm/mach-tegra/board-harmony-pinmux.c @@ -15,13 +15,11 @@ */ #include -#include #include #include #include -#include "gpio-names.h" #include "board-harmony.h" #include "board-pinmux.h" @@ -144,24 +142,9 @@ static struct tegra_pingroup_config harmony_pinmux[] = { {TEGRA_PINGROUP_XM2D, TEGRA_MUX_NONE, TEGRA_PUPD_NORMAL, TEGRA_TRI_NORMAL}, }; -static struct tegra_gpio_table gpio_table[] = { - { .gpio = TEGRA_GPIO_SD2_CD, .enable = true }, - { .gpio = TEGRA_GPIO_SD2_WP, .enable = true }, - { .gpio = TEGRA_GPIO_SD2_POWER, .enable = true }, - { .gpio = TEGRA_GPIO_SD4_CD, .enable = true }, - { .gpio = TEGRA_GPIO_SD4_WP, .enable = true }, - { .gpio = TEGRA_GPIO_SD4_POWER, .enable = true }, - { .gpio = TEGRA_GPIO_CDC_IRQ, .enable = true }, - { .gpio = TEGRA_GPIO_HP_DET, .enable = true }, - { .gpio = TEGRA_GPIO_INT_MIC_EN, .enable = true }, - { .gpio = TEGRA_GPIO_EXT_MIC_EN, .enable = true }, -}; - static struct tegra_board_pinmux_conf conf = { .pgs = harmony_pinmux, .pg_count = ARRAY_SIZE(harmony_pinmux), - .gpios = gpio_table, - .gpio_count = ARRAY_SIZE(gpio_table), }; void harmony_pinmux_init(void) diff --git a/arch/arm/mach-tegra/board-paz00-pinmux.c b/arch/arm/mach-tegra/board-paz00-pinmux.c index c775572dcea4..f0ec46612f52 100644 --- a/arch/arm/mach-tegra/board-paz00-pinmux.c +++ b/arch/arm/mach-tegra/board-paz00-pinmux.c @@ -15,13 +15,11 @@ */ #include -#include #include #include #include -#include "gpio-names.h" #include "board-paz00.h" #include "board-pinmux.h" @@ -144,21 +142,9 @@ static struct tegra_pingroup_config paz00_pinmux[] = { {TEGRA_PINGROUP_XM2D, TEGRA_MUX_NONE, TEGRA_PUPD_NORMAL, TEGRA_TRI_NORMAL}, }; -static struct tegra_gpio_table gpio_table[] = { - { .gpio = TEGRA_GPIO_SD1_CD, .enable = true }, - { .gpio = TEGRA_GPIO_SD1_WP, .enable = true }, - { .gpio = TEGRA_GPIO_SD1_POWER, .enable = true }, - { .gpio = TEGRA_ULPI_RST, .enable = true }, - { .gpio = TEGRA_WIFI_PWRN, .enable = true }, - { .gpio = TEGRA_WIFI_RST, .enable = true }, - { .gpio = TEGRA_WIFI_LED, .enable = true }, -}; - static struct tegra_board_pinmux_conf conf = { .pgs = paz00_pinmux, .pg_count = ARRAY_SIZE(paz00_pinmux), - .gpios = gpio_table, - .gpio_count = ARRAY_SIZE(gpio_table), }; void paz00_pinmux_init(void) diff --git a/arch/arm/mach-tegra/board-pinmux.c b/arch/arm/mach-tegra/board-pinmux.c index adc3efe979b3..3015b5a38936 100644 --- a/arch/arm/mach-tegra/board-pinmux.c +++ b/arch/arm/mach-tegra/board-pinmux.c @@ -18,7 +18,6 @@ #include #include -#include #include #include "board-pinmux.h" @@ -26,18 +25,6 @@ struct tegra_board_pinmux_conf *confs[2]; -static void tegra_board_pinmux_setup_gpios(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(confs); i++) { - if (!confs[i]) - continue; - - tegra_gpio_config(confs[i]->gpios, confs[i]->gpio_count); - } -} - static void tegra_board_pinmux_setup_pinmux(void) { int i; @@ -57,29 +44,17 @@ static void tegra_board_pinmux_setup_pinmux(void) static int tegra_board_pinmux_bus_notify(struct notifier_block *nb, unsigned long event, void *vdev) { - static bool had_gpio; - static bool had_pinmux; - struct device *dev = vdev; - const char *devname; if (event != BUS_NOTIFY_BOUND_DRIVER) return NOTIFY_DONE; - devname = dev_name(dev); + if (strcmp(dev_name(dev), PINMUX_DEV)) + return NOTIFY_DONE; - if (!had_gpio && !strcmp(devname, GPIO_DEV)) { - tegra_board_pinmux_setup_gpios(); - had_gpio = true; - } else if (!had_pinmux && !strcmp(devname, PINMUX_DEV)) { - tegra_board_pinmux_setup_pinmux(); - had_pinmux = true; - } + tegra_board_pinmux_setup_pinmux(); - if (had_gpio && had_pinmux) - return NOTIFY_STOP_MASK; - else - return NOTIFY_DONE; + return NOTIFY_STOP_MASK; } static struct notifier_block nb = { diff --git a/arch/arm/mach-tegra/board-pinmux.h b/arch/arm/mach-tegra/board-pinmux.h index 4aac73546f54..e08214d84bd9 100644 --- a/arch/arm/mach-tegra/board-pinmux.h +++ b/arch/arm/mach-tegra/board-pinmux.h @@ -15,11 +15,9 @@ #ifndef __MACH_TEGRA_BOARD_PINMUX_H #define __MACH_TEGRA_BOARD_PINMUX_H -#define GPIO_DEV "tegra-gpio" #define PINMUX_DEV "tegra-pinmux" struct tegra_pingroup_config; -struct tegra_gpio_table; struct tegra_board_pinmux_conf { struct tegra_pingroup_config *pgs; @@ -27,9 +25,6 @@ struct tegra_board_pinmux_conf { struct tegra_drive_pingroup_config *drives; int drive_count; - - struct tegra_gpio_table *gpios; - int gpio_count; }; void tegra_board_pinmux_init(struct tegra_board_pinmux_conf *conf_a, diff --git a/arch/arm/mach-tegra/board-seaboard-pinmux.c b/arch/arm/mach-tegra/board-seaboard-pinmux.c index 55e7e43a14ad..3bf7e9705b6a 100644 --- a/arch/arm/mach-tegra/board-seaboard-pinmux.c +++ b/arch/arm/mach-tegra/board-seaboard-pinmux.c @@ -15,13 +15,11 @@ #include #include -#include #include #include #include -#include "gpio-names.h" #include "board-pinmux.h" #include "board-seaboard.h" @@ -179,35 +177,9 @@ static struct tegra_pingroup_config ventana_pinmux[] = { {TEGRA_PINGROUP_SPIG, TEGRA_MUX_SPI2_ALT, TEGRA_PUPD_NORMAL, TEGRA_TRI_TRISTATE}, }; -static struct tegra_gpio_table common_gpio_table[] = { - { .gpio = TEGRA_GPIO_SD2_CD, .enable = true }, - { .gpio = TEGRA_GPIO_SD2_WP, .enable = true }, - { .gpio = TEGRA_GPIO_SD2_POWER, .enable = true }, - { .gpio = TEGRA_GPIO_CDC_IRQ, .enable = true }, -}; - -static struct tegra_gpio_table seaboard_gpio_table[] = { - { .gpio = TEGRA_GPIO_LIDSWITCH, .enable = true }, - { .gpio = TEGRA_GPIO_POWERKEY, .enable = true }, - { .gpio = TEGRA_GPIO_HP_DET, .enable = true }, - { .gpio = TEGRA_GPIO_ISL29018_IRQ, .enable = true }, - { .gpio = TEGRA_GPIO_USB1, .enable = true }, -}; - -static struct tegra_gpio_table ventana_gpio_table[] = { - /* hp_det */ - { .gpio = TEGRA_GPIO_PW2, .enable = true }, - /* int_mic_en */ - { .gpio = TEGRA_GPIO_PX0, .enable = true }, - /* ext_mic_en */ - { .gpio = TEGRA_GPIO_PX1, .enable = true }, -}; - static struct tegra_board_pinmux_conf common_conf = { .pgs = common_pinmux, .pg_count = ARRAY_SIZE(common_pinmux), - .gpios = common_gpio_table, - .gpio_count = ARRAY_SIZE(common_gpio_table), }; static struct tegra_board_pinmux_conf seaboard_conf = { @@ -215,15 +187,11 @@ static struct tegra_board_pinmux_conf seaboard_conf = { .pg_count = ARRAY_SIZE(seaboard_pinmux), .drives = seaboard_drive_pinmux, .drive_count = ARRAY_SIZE(seaboard_drive_pinmux), - .gpios = seaboard_gpio_table, - .gpio_count = ARRAY_SIZE(seaboard_gpio_table), }; static struct tegra_board_pinmux_conf ventana_conf = { .pgs = ventana_pinmux, .pg_count = ARRAY_SIZE(ventana_pinmux), - .gpios = ventana_gpio_table, - .gpio_count = ARRAY_SIZE(ventana_gpio_table), }; void seaboard_pinmux_init(void) diff --git a/arch/arm/mach-tegra/board-seaboard.c b/arch/arm/mach-tegra/board-seaboard.c index 59987540df19..a0184fb44222 100644 --- a/arch/arm/mach-tegra/board-seaboard.c +++ b/arch/arm/mach-tegra/board-seaboard.c @@ -249,7 +249,6 @@ static void __init tegra_kaen_init(void) debug_uart_platform_data[0].irq = INT_UARTB; seaboard_audio_pdata.gpio_hp_mute = TEGRA_GPIO_KAEN_HP_MUTE; - tegra_gpio_enable(TEGRA_GPIO_KAEN_HP_MUTE); seaboard_common_init(); diff --git a/arch/arm/mach-tegra/board-trimslice-pinmux.c b/arch/arm/mach-tegra/board-trimslice-pinmux.c index a21a2be57cb6..a1902d4e8e5d 100644 --- a/arch/arm/mach-tegra/board-trimslice-pinmux.c +++ b/arch/arm/mach-tegra/board-trimslice-pinmux.c @@ -13,7 +13,6 @@ * GNU General Public License for more details. * */ -#include #include #include #include @@ -21,7 +20,6 @@ #include #include -#include "gpio-names.h" #include "board-pinmux.h" #include "board-trimslice.h" @@ -144,19 +142,9 @@ static struct tegra_pingroup_config trimslice_pinmux[] = { {TEGRA_PINGROUP_XM2D, TEGRA_MUX_NONE, TEGRA_PUPD_NORMAL, TEGRA_TRI_NORMAL}, }; -static struct tegra_gpio_table gpio_table[] = { - { .gpio = TRIMSLICE_GPIO_SD4_CD, .enable = true }, /* mmc4 cd */ - { .gpio = TRIMSLICE_GPIO_SD4_WP, .enable = true }, /* mmc4 wp */ - - { .gpio = TRIMSLICE_GPIO_USB1_MODE, .enable = true }, /* USB1 mode */ - { .gpio = TRIMSLICE_GPIO_USB2_RST, .enable = true }, /* USB2 PHY rst */ -}; - static struct tegra_board_pinmux_conf conf = { .pgs = trimslice_pinmux, .pg_count = ARRAY_SIZE(trimslice_pinmux), - .gpios = gpio_table, - .gpio_count = ARRAY_SIZE(gpio_table), }; void trimslice_pinmux_init(void) diff --git a/arch/arm/mach-tegra/include/mach/gpio-tegra.h b/arch/arm/mach-tegra/include/mach/gpio-tegra.h index 6140820555e1..a978b3cc3a8d 100644 --- a/arch/arm/mach-tegra/include/mach/gpio-tegra.h +++ b/arch/arm/mach-tegra/include/mach/gpio-tegra.h @@ -25,13 +25,4 @@ #define TEGRA_NR_GPIOS INT_GPIO_NR -struct tegra_gpio_table { - int gpio; /* GPIO number */ - bool enable; /* Enable for GPIO at init? */ -}; - -void tegra_gpio_config(struct tegra_gpio_table *table, int num); -void tegra_gpio_enable(int gpio); -void tegra_gpio_disable(int gpio); - #endif diff --git a/arch/arm/mach-tegra/usb_phy.c b/arch/arm/mach-tegra/usb_phy.c index c5b2ac04e2a0..d71d2fed6721 100644 --- a/arch/arm/mach-tegra/usb_phy.c +++ b/arch/arm/mach-tegra/usb_phy.c @@ -711,7 +711,6 @@ struct tegra_usb_phy *tegra_usb_phy_open(int instance, void __iomem *regs, err = -ENXIO; goto err1; } - tegra_gpio_enable(ulpi_config->reset_gpio); gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b"); gpio_direction_output(ulpi_config->reset_gpio, 0); phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0); diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index 4383a7205349..dc5184d57892 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -26,10 +26,10 @@ #include #include #include +#include #include -#include #include #include @@ -108,18 +108,29 @@ static void tegra_gpio_mask_write(u32 reg, int gpio, int value) tegra_gpio_writel(val, reg); } -void tegra_gpio_enable(int gpio) +static void tegra_gpio_enable(int gpio) { tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 1); } EXPORT_SYMBOL_GPL(tegra_gpio_enable); -void tegra_gpio_disable(int gpio) +static void tegra_gpio_disable(int gpio) { tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 0); } EXPORT_SYMBOL_GPL(tegra_gpio_disable); +int tegra_gpio_request(struct gpio_chip *chip, unsigned offset) +{ + return pinctrl_request_gpio(offset); +} + +void tegra_gpio_free(struct gpio_chip *chip, unsigned offset) +{ + pinctrl_free_gpio(offset); + tegra_gpio_disable(offset); +} + static void tegra_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { tegra_gpio_mask_write(GPIO_MSK_OUT(offset), offset, value); @@ -133,6 +144,7 @@ static int tegra_gpio_get(struct gpio_chip *chip, unsigned offset) static int tegra_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { tegra_gpio_mask_write(GPIO_MSK_OE(offset), offset, 0); + tegra_gpio_enable(offset); return 0; } @@ -141,6 +153,7 @@ static int tegra_gpio_direction_output(struct gpio_chip *chip, unsigned offset, { tegra_gpio_set(chip, offset, value); tegra_gpio_mask_write(GPIO_MSK_OE(offset), offset, 1); + tegra_gpio_enable(offset); return 0; } @@ -151,13 +164,14 @@ static int tegra_gpio_to_irq(struct gpio_chip *chip, unsigned offset) static struct gpio_chip tegra_gpio_chip = { .label = "tegra-gpio", + .request = tegra_gpio_request, + .free = tegra_gpio_free, .direction_input = tegra_gpio_direction_input, .get = tegra_gpio_get, .direction_output = tegra_gpio_direction_output, .set = tegra_gpio_set, .to_irq = tegra_gpio_to_irq, .base = 0, - .ngpio = TEGRA_NR_GPIOS, }; static void tegra_gpio_irq_ack(struct irq_data *d) @@ -493,20 +507,6 @@ static int __init tegra_gpio_init(void) } postcore_initcall(tegra_gpio_init); -void tegra_gpio_config(struct tegra_gpio_table *table, int num) -{ - int i; - - for (i = 0; i < num; i++) { - int gpio = table[i].gpio; - - if (table[i].enable) - tegra_gpio_enable(gpio); - else - tegra_gpio_disable(gpio); - } -} - #ifdef CONFIG_DEBUG_FS #include diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index 53b26502f6e2..ff5a16991939 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -269,7 +269,6 @@ static int __devinit sdhci_tegra_probe(struct platform_device *pdev) "failed to allocate power gpio\n"); goto err_power_req; } - tegra_gpio_enable(plat->power_gpio); gpio_direction_output(plat->power_gpio, 1); } @@ -280,7 +279,6 @@ static int __devinit sdhci_tegra_probe(struct platform_device *pdev) "failed to allocate cd gpio\n"); goto err_cd_req; } - tegra_gpio_enable(plat->cd_gpio); gpio_direction_input(plat->cd_gpio); rc = request_irq(gpio_to_irq(plat->cd_gpio), carddetect_irq, @@ -301,7 +299,6 @@ static int __devinit sdhci_tegra_probe(struct platform_device *pdev) "failed to allocate wp gpio\n"); goto err_wp_req; } - tegra_gpio_enable(plat->wp_gpio); gpio_direction_input(plat->wp_gpio); } @@ -329,23 +326,17 @@ err_add_host: clk_disable(pltfm_host->clk); clk_put(pltfm_host->clk); err_clk_get: - if (gpio_is_valid(plat->wp_gpio)) { - tegra_gpio_disable(plat->wp_gpio); + if (gpio_is_valid(plat->wp_gpio)) gpio_free(plat->wp_gpio); - } err_wp_req: if (gpio_is_valid(plat->cd_gpio)) free_irq(gpio_to_irq(plat->cd_gpio), host); err_cd_irq_req: - if (gpio_is_valid(plat->cd_gpio)) { - tegra_gpio_disable(plat->cd_gpio); + if (gpio_is_valid(plat->cd_gpio)) gpio_free(plat->cd_gpio); - } err_cd_req: - if (gpio_is_valid(plat->power_gpio)) { - tegra_gpio_disable(plat->power_gpio); + if (gpio_is_valid(plat->power_gpio)) gpio_free(plat->power_gpio); - } err_power_req: err_no_plat: sdhci_pltfm_free(pdev); @@ -362,21 +353,16 @@ static int __devexit sdhci_tegra_remove(struct platform_device *pdev) sdhci_remove_host(host, dead); - if (gpio_is_valid(plat->wp_gpio)) { - tegra_gpio_disable(plat->wp_gpio); + if (gpio_is_valid(plat->wp_gpio)) gpio_free(plat->wp_gpio); - } if (gpio_is_valid(plat->cd_gpio)) { free_irq(gpio_to_irq(plat->cd_gpio), host); - tegra_gpio_disable(plat->cd_gpio); gpio_free(plat->cd_gpio); } - if (gpio_is_valid(plat->power_gpio)) { - tegra_gpio_disable(plat->power_gpio); + if (gpio_is_valid(plat->power_gpio)) gpio_free(plat->power_gpio); - } clk_disable(pltfm_host->clk); clk_put(pltfm_host->clk); -- cgit v1.2.3 From b982ff0e9a52553db246f7e171c03e7e0efedbe5 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Tue, 26 Apr 2011 09:03:27 +0530 Subject: gpio/nomadik: don't set SLPM to 1 for non-wakeup pins Setting GPIOs' SLPM value to 1 (WAKEUP_DISABLE) is seen to cause increased power consumption in sleep/deep-sleep. So remove the code which disables SLPM based on the wakeup settings and only ensure it is on as needed. Signed-off-by: Rabin Vincent Reviewed-by: Srinidhi Kasagar Signed-off-by: Linus Walleij --- drivers/gpio/gpio-nomadik.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index 839624f9fe6a..f1ebd05a9c50 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -58,7 +58,6 @@ struct nmk_gpio_chip { u32 real_wake; u32 rwimsc; u32 fwimsc; - u32 slpm; u32 pull_up; }; @@ -583,10 +582,14 @@ static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip, static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip, int gpio, bool on) { - if (nmk_chip->sleepmode) { + /* + * Ensure WAKEUP_ENABLE is on. No need to disable it if wakeup is + * disabled, since setting SLPM to 1 increases power consumption, and + * wakeup is anyhow controlled by the RIMSC and FIMSC registers. + */ + if (nmk_chip->sleepmode && on) { __nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base, - on ? NMK_GPIO_SLPM_WAKEUP_ENABLE - : NMK_GPIO_SLPM_WAKEUP_DISABLE); + NMK_GPIO_SLPM_WAKEUP_ENABLE); } __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on); @@ -1016,13 +1019,6 @@ void nmk_gpio_wakeups_suspend(void) writel(chip->fwimsc & chip->real_wake, chip->addr + NMK_GPIO_FWIMSC); - if (chip->sleepmode) { - chip->slpm = readl(chip->addr + NMK_GPIO_SLPC); - - /* 0 -> wakeup enable */ - writel(~chip->real_wake, chip->addr + NMK_GPIO_SLPC); - } - clk_disable(chip->clk); } } @@ -1042,9 +1038,6 @@ void nmk_gpio_wakeups_resume(void) writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC); writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC); - if (chip->sleepmode) - writel(chip->slpm, chip->addr + NMK_GPIO_SLPC); - clk_disable(chip->clk); } } -- cgit v1.2.3 From 6c12fe888a237c4a32d194fca8624c5c1d55e1b3 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Mon, 23 May 2011 12:13:33 +0530 Subject: gpio/nomadik: cache [rf]w?imsc Cache two more registers in the GPIO controller. Signed-off-by: Rabin Vincent Reviewed-by: Srinidhi KASAGAR Signed-off-by: Linus Walleij --- drivers/gpio/gpio-nomadik.c | 42 ++++++++++++++++++++++++++---------------- 1 file changed, 26 insertions(+), 16 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index f1ebd05a9c50..45a0e0a3d6e9 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -58,6 +58,8 @@ struct nmk_gpio_chip { u32 real_wake; u32 rwimsc; u32 fwimsc; + u32 rimsc; + u32 fimsc; u32 pull_up; }; @@ -149,8 +151,8 @@ static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip, unsigned offset, int gpio_mode, bool glitch) { - u32 rwimsc = readl(nmk_chip->addr + NMK_GPIO_RWIMSC); - u32 fwimsc = readl(nmk_chip->addr + NMK_GPIO_FWIMSC); + u32 rwimsc = nmk_chip->rwimsc; + u32 fwimsc = nmk_chip->fwimsc; if (glitch && nmk_chip->set_ioforce) { u32 bit = BIT(offset); @@ -555,27 +557,38 @@ static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip, int gpio, enum nmk_gpio_irq_type which, bool enable) { - u32 rimsc = which == WAKE ? NMK_GPIO_RWIMSC : NMK_GPIO_RIMSC; - u32 fimsc = which == WAKE ? NMK_GPIO_FWIMSC : NMK_GPIO_FIMSC; u32 bitmask = nmk_gpio_get_bitmask(gpio); - u32 reg; + u32 *rimscval; + u32 *fimscval; + u32 rimscreg; + u32 fimscreg; + + if (which == NORMAL) { + rimscreg = NMK_GPIO_RIMSC; + fimscreg = NMK_GPIO_FIMSC; + rimscval = &nmk_chip->rimsc; + fimscval = &nmk_chip->fimsc; + } else { + rimscreg = NMK_GPIO_RWIMSC; + fimscreg = NMK_GPIO_FWIMSC; + rimscval = &nmk_chip->rwimsc; + fimscval = &nmk_chip->fwimsc; + } /* we must individually set/clear the two edges */ if (nmk_chip->edge_rising & bitmask) { - reg = readl(nmk_chip->addr + rimsc); if (enable) - reg |= bitmask; + *rimscval |= bitmask; else - reg &= ~bitmask; - writel(reg, nmk_chip->addr + rimsc); + *rimscval &= ~bitmask; + writel(*rimscval, nmk_chip->addr + rimscreg); } if (nmk_chip->edge_falling & bitmask) { - reg = readl(nmk_chip->addr + fimsc); if (enable) - reg |= bitmask; + *fimscval |= bitmask; else - reg &= ~bitmask; - writel(reg, nmk_chip->addr + fimsc); + *fimscval &= ~bitmask; + writel(*fimscval, nmk_chip->addr + fimscreg); } } @@ -1011,9 +1024,6 @@ void nmk_gpio_wakeups_suspend(void) clk_enable(chip->clk); - chip->rwimsc = readl(chip->addr + NMK_GPIO_RWIMSC); - chip->fwimsc = readl(chip->addr + NMK_GPIO_FWIMSC); - writel(chip->rwimsc & chip->real_wake, chip->addr + NMK_GPIO_RWIMSC); writel(chip->fwimsc & chip->real_wake, -- cgit v1.2.3 From 6c42ad1cf4d7f22469eaecb2eee3b6442169d732 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Mon, 23 May 2011 12:22:18 +0530 Subject: gpio/nomadik: fix spurious interrupts with SKE If the pin is switching to altfunc, and there was an interrupt installed on it which has been lazy disabled, actually mask the interrupt to prevent spurious interrupts that would occur while the pin is under control of the peripheral. Only SKE does this. Signed-off-by: Rabin Vincent Reviewed-by: Srinidhi Kasagar Signed-off-by: Linus Walleij --- drivers/gpio/gpio-nomadik.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index 45a0e0a3d6e9..681daee80291 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -174,6 +174,36 @@ static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip, } } +static void +nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned offset) +{ + u32 falling = nmk_chip->fimsc & BIT(offset); + u32 rising = nmk_chip->rimsc & BIT(offset); + int gpio = nmk_chip->chip.base + offset; + int irq = NOMADIK_GPIO_TO_IRQ(gpio); + struct irq_data *d = irq_get_irq_data(irq); + + if (!rising && !falling) + return; + + if (!d || !irqd_irq_disabled(d)) + return; + + if (rising) { + nmk_chip->rimsc &= ~BIT(offset); + writel_relaxed(nmk_chip->rimsc, + nmk_chip->addr + NMK_GPIO_RIMSC); + } + + if (falling) { + nmk_chip->fimsc &= ~BIT(offset); + writel_relaxed(nmk_chip->fimsc, + nmk_chip->addr + NMK_GPIO_FIMSC); + } + + dev_dbg(nmk_chip->chip.dev, "%d: clearing interrupt mask\n", gpio); +} + static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, pin_cfg_t cfg, bool sleep, unsigned int *slpmregs) { @@ -239,6 +269,15 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, __nmk_gpio_set_pull(nmk_chip, offset, pull); } + /* + * If the pin is switching to altfunc, and there was an interrupt + * installed on it which has been lazy disabled, actually mask the + * interrupt to prevent spurious interrupts that would occur while the + * pin is under control of the peripheral. Only SKE does this. + */ + if (af != NMK_GPIO_ALT_GPIO) + nmk_gpio_disable_lazy_irq(nmk_chip, offset); + /* * If we've backed up the SLPM registers (glitch workaround), modify * the backups since they will be restored. -- cgit v1.2.3 From ebc6178dab43b38042f0e089526bad49081870e5 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Wed, 28 Sep 2011 15:49:11 +0530 Subject: gpio/nomadik: support low EMI mode Low EMI (Electro-Magnetic Interference) mode means lower slew rate on the signals. The Nomadik GPIO controller supports this so create an interface to enable it. Signed-off-by: Rabin Vincent Reviewed-by: Srinidhi Kasagar Signed-off-by: Linus Walleij --- arch/arm/plat-nomadik/include/plat/gpio-nomadik.h | 1 + arch/arm/plat-nomadik/include/plat/pincfg.h | 6 ++++++ drivers/gpio/gpio-nomadik.c | 25 +++++++++++++++++++++++ 3 files changed, 32 insertions(+) (limited to 'drivers/gpio') diff --git a/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h b/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h index 9605bf227df9..3e8b7f16fb78 100644 --- a/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h +++ b/arch/arm/plat-nomadik/include/plat/gpio-nomadik.h @@ -29,6 +29,7 @@ #define NMK_GPIO_SLPC 0x1c #define NMK_GPIO_AFSLA 0x20 #define NMK_GPIO_AFSLB 0x24 +#define NMK_GPIO_LOWEMI 0x28 #define NMK_GPIO_RIMSC 0x40 #define NMK_GPIO_FIMSC 0x44 diff --git a/arch/arm/plat-nomadik/include/plat/pincfg.h b/arch/arm/plat-nomadik/include/plat/pincfg.h index 22cb97d2d8ad..da6b1e35e171 100644 --- a/arch/arm/plat-nomadik/include/plat/pincfg.h +++ b/arch/arm/plat-nomadik/include/plat/pincfg.h @@ -105,6 +105,12 @@ typedef unsigned long pin_cfg_t; #define PIN_SLPM_VAL_LOW ((1 + 0) << PIN_SLPM_VAL_SHIFT) #define PIN_SLPM_VAL_HIGH ((1 + 1) << PIN_SLPM_VAL_SHIFT) +#define PIN_LOWEMI_SHIFT 25 +#define PIN_LOWEMI_MASK (0x1 << PIN_LOWEMI_SHIFT) +#define PIN_LOWEMI(x) (((x) & PIN_LOWEMI_MASK) >> PIN_LOWEMI_SHIFT) +#define PIN_LOWEMI_DISABLED (0 << PIN_LOWEMI_SHIFT) +#define PIN_LOWEMI_ENABLED (1 << PIN_LOWEMI_SHIFT) + /* Shortcuts. Use these instead of separate DIR, PULL, and VAL. */ #define PIN_INPUT_PULLDOWN (PIN_DIR_INPUT | PIN_PULL_DOWN) #define PIN_INPUT_PULLUP (PIN_DIR_INPUT | PIN_PULL_UP) diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index 681daee80291..7b45d88b4f44 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -61,6 +61,7 @@ struct nmk_gpio_chip { u32 rimsc; u32 fimsc; u32 pull_up; + u32 lowemi; }; static struct nmk_gpio_chip * @@ -125,6 +126,24 @@ static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip, } } +static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip, + unsigned offset, bool lowemi) +{ + u32 bit = BIT(offset); + bool enabled = nmk_chip->lowemi & bit; + + if (lowemi == enabled) + return; + + if (lowemi) + nmk_chip->lowemi |= bit; + else + nmk_chip->lowemi &= ~bit; + + writel_relaxed(nmk_chip->lowemi, + nmk_chip->addr + NMK_GPIO_LOWEMI); +} + static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip, unsigned offset) { @@ -269,6 +288,8 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, __nmk_gpio_set_pull(nmk_chip, offset, pull); } + __nmk_gpio_set_lowemi(nmk_chip, offset, PIN_LOWEMI(cfg)); + /* * If the pin is switching to altfunc, and there was an interrupt * installed on it which has been lazy disabled, actually mask the @@ -1181,6 +1202,10 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) chip->dev = &dev->dev; chip->owner = THIS_MODULE; + clk_enable(nmk_chip->clk); + nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI); + clk_disable(nmk_chip->clk); + ret = gpiochip_add(&nmk_chip->chip); if (ret) goto out_free; -- cgit v1.2.3 From 8d91771ca4aff257f53ac7643f90b5cbb740971b Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 17 Apr 2012 10:15:54 +0200 Subject: gpio/nomadik: use ioremap() instead of static mappings We were using a custom io_p2v() (physical-to-virtual) translation macro, but it's fully possible to just ioremap() this memory now, so skip use of static addresses altogether. Signed-off-by: Linus Walleij --- drivers/gpio/gpio-nomadik.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index 7b45d88b4f44..b35eb25209ec 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -28,8 +28,6 @@ #include #include -#include -#include /* * The GPIO module in the Nomadik family of Systems-on-Chip is an @@ -1139,6 +1137,7 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) struct resource *res; struct clk *clk; int secondary_irq; + void __iomem *base; int irq; int ret; @@ -1169,10 +1168,16 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) goto out; } + base = ioremap(res->start, resource_size(res)); + if (!base) { + ret = -ENOMEM; + goto out_release; + } + clk = clk_get(&dev->dev, NULL); if (IS_ERR(clk)) { ret = PTR_ERR(clk); - goto out_release; + goto out_unmap; } nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL); @@ -1186,7 +1191,7 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) */ nmk_chip->bank = dev->id; nmk_chip->clk = clk; - nmk_chip->addr = io_p2v(res->start); + nmk_chip->addr = base; nmk_chip->chip = nmk_gpio_template; nmk_chip->parent_irq = irq; nmk_chip->secondary_parent_irq = secondary_irq; @@ -1226,6 +1231,8 @@ out_free: out_clk: clk_disable(clk); clk_put(clk); +out_unmap: + iounmap(base); out_release: release_mem_region(res->start, resource_size(res)); out: -- cgit v1.2.3 From 513c27f84e283341889ee17737e1e7e9f99ebeb5 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Fri, 13 Apr 2012 15:05:05 +0100 Subject: drivers/gpio: gpio-nomadik: Apply Device Tree bindings This creates Device Tree bindings for the Nomadik GPIO driver. Acked-by: Arnd Bergmann Signed-off-by: Lee Jones Signed-off-by: Linus Walleij --- arch/arm/mach-ux500/board-mop500.c | 12 +++++++++++ drivers/gpio/gpio-nomadik.c | 41 +++++++++++++++++++++++++++++++++++--- 2 files changed, 50 insertions(+), 3 deletions(-) (limited to 'drivers/gpio') diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c index 77d03c1fbd04..506414015575 100644 --- a/arch/arm/mach-ux500/board-mop500.c +++ b/arch/arm/mach-ux500/board-mop500.c @@ -746,10 +746,22 @@ MACHINE_END #ifdef CONFIG_MACH_UX500_DT struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = { + /* Requires DMA and call-back bindings. */ OF_DEV_AUXDATA("arm,pl011", 0x80120000, "uart0", &uart0_plat), OF_DEV_AUXDATA("arm,pl011", 0x80121000, "uart1", &uart1_plat), OF_DEV_AUXDATA("arm,pl011", 0x80007000, "uart2", &uart2_plat), + /* Requires DMA bindings. */ OF_DEV_AUXDATA("arm,pl022", 0x80002000, "ssp0", &ssp0_plat), + /* Requires clock name bindings. */ + OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e000, "gpio.0", NULL), + OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e080, "gpio.1", NULL), + OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e000, "gpio.2", NULL), + OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e080, "gpio.3", NULL), + OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e100, "gpio.4", NULL), + OF_DEV_AUXDATA("st,nomadik-gpio", 0x8000e180, "gpio.5", NULL), + OF_DEV_AUXDATA("st,nomadik-gpio", 0x8011e000, "gpio.6", NULL), + OF_DEV_AUXDATA("st,nomadik-gpio", 0x8011e080, "gpio.7", NULL), + OF_DEV_AUXDATA("st,nomadik-gpio", 0xa03fe000, "gpio.8", NULL), {}, }; diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index b35eb25209ec..06addfd797ab 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -1132,6 +1132,7 @@ void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up) static int __devinit nmk_gpio_probe(struct platform_device *dev) { struct nmk_gpio_platform_data *pdata = dev->dev.platform_data; + struct device_node *np = dev->dev.of_node; struct nmk_gpio_chip *nmk_chip; struct gpio_chip *chip; struct resource *res; @@ -1141,8 +1142,28 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) int irq; int ret; - if (!pdata) + if (!pdata && !np) { + dev_err(&dev->dev, "No platform data or device tree found\n"); return -ENODEV; + } + + if (np) { + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + if (of_get_property(np, "supports-sleepmode", NULL)) + pdata->supports_sleepmode = true; + + if (of_property_read_u32(np, "gpio-bank", &dev->id)) { + dev_err(&dev->dev, "gpio-bank property not found\n"); + ret = -EINVAL; + goto out_dt; + } + + pdata->first_gpio = dev->id * NMK_GPIO_PER_CHIP; + pdata->num_gpio = NMK_GPIO_PER_CHIP; + } res = platform_get_resource(dev, IORESOURCE_MEM, 0); if (!res) { @@ -1185,6 +1206,7 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) ret = -ENOMEM; goto out_clk; } + /* * The virt address in nmk_chip->addr is in the nomadik register space, * so we can simply convert the resource address, without remapping @@ -1211,6 +1233,8 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI); clk_disable(nmk_chip->clk); + chip->of_node = np; + ret = gpiochip_add(&nmk_chip->chip); if (ret) goto out_free; @@ -1218,12 +1242,13 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) BUG_ON(nmk_chip->bank >= ARRAY_SIZE(nmk_gpio_chips)); nmk_gpio_chips[nmk_chip->bank] = nmk_chip; + platform_set_drvdata(dev, nmk_chip); nmk_gpio_init_irq(nmk_chip); - dev_info(&dev->dev, "at address %p\n", - nmk_chip->addr); + dev_info(&dev->dev, "at address %p\n", nmk_chip->addr); + return 0; out_free: @@ -1238,13 +1263,23 @@ out_release: out: dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret, pdata->first_gpio, pdata->first_gpio+31); +out_dt: + if (np) + kfree(pdata); + return ret; } +static const struct of_device_id nmk_gpio_match[] = { + { .compatible = "st,nomadik-gpio", }, + {} +}; + static struct platform_driver nmk_gpio_driver = { .driver = { .owner = THIS_MODULE, .name = "gpio", + .of_match_table = nmk_gpio_match, }, .probe = nmk_gpio_probe, }; -- cgit v1.2.3 From a60b57eddaa8af6c02cf7bbeb58ebf82881f08ac Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Thu, 19 Apr 2012 21:36:31 +0100 Subject: drivers/gpio: gpio-nomadik: Add support for irqdomains Add irq domain support to the gpio-nomadik GPIO driver. This enables its users to support dynamic IRQ assignment, which is requried by Device Tree. Signed-off-by: Lee Jones Signed-off-by: Linus Walleij --- arch/arm/mach-ux500/cpu.c | 12 +++++ drivers/gpio/gpio-nomadik.c | 106 ++++++++++++++++++++++++-------------------- 2 files changed, 70 insertions(+), 48 deletions(-) (limited to 'drivers/gpio') diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c index d11f3892a27d..f6522f9f129c 100644 --- a/arch/arm/mach-ux500/cpu.c +++ b/arch/arm/mach-ux500/cpu.c @@ -30,6 +30,18 @@ void __iomem *_PRCMU_BASE; +/* + * FIXME: Should we set up the GPIO domain here? + * + * The problem is that we cannot put the interrupt resources into the platform + * device until the irqdomain has been added. Right now, we set the GIC interrupt + * domain from init_irq(), then load the gpio driver from + * core_initcall(nmk_gpio_init) and add the platform devices from + * arch_initcall(customize_machine). + * + * This feels fragile because it depends on the gpio device getting probed + * _before_ any device uses the gpio interrupts. +*/ static const struct of_device_id ux500_dt_irq_match[] = { { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, }, {}, diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c index 06addfd797ab..9b126b6d79cc 100644 --- a/drivers/gpio/gpio-nomadik.c +++ b/drivers/gpio/gpio-nomadik.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -41,6 +42,7 @@ struct nmk_gpio_chip { struct gpio_chip chip; + struct irq_domain *domain; void __iomem *addr; struct clk *clk; unsigned int bank; @@ -393,7 +395,7 @@ static int __nmk_config_pins(pin_cfg_t *cfgs, int num, bool sleep) struct nmk_gpio_chip *nmk_chip; int pin = PIN_NUM(cfgs[i]); - nmk_chip = irq_get_chip_data(NOMADIK_GPIO_TO_IRQ(pin)); + nmk_chip = nmk_gpio_chips[pin / NMK_GPIO_PER_CHIP]; if (!nmk_chip) { ret = -EINVAL; break; @@ -401,7 +403,7 @@ static int __nmk_config_pins(pin_cfg_t *cfgs, int num, bool sleep) clk_enable(nmk_chip->clk); spin_lock(&nmk_chip->lock); - __nmk_config_pin(nmk_chip, pin - nmk_chip->chip.base, + __nmk_config_pin(nmk_chip, pin % NMK_GPIO_PER_CHIP, cfgs[i], sleep, glitch ? slpm : NULL); spin_unlock(&nmk_chip->lock); clk_disable(nmk_chip->clk); @@ -485,7 +487,7 @@ int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode) struct nmk_gpio_chip *nmk_chip; unsigned long flags; - nmk_chip = irq_get_chip_data(NOMADIK_GPIO_TO_IRQ(gpio)); + nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; if (!nmk_chip) return -EINVAL; @@ -493,7 +495,7 @@ int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode) spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); spin_lock(&nmk_chip->lock); - __nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base, mode); + __nmk_gpio_set_slpm(nmk_chip, gpio % NMK_GPIO_PER_CHIP, mode); spin_unlock(&nmk_chip->lock); spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); @@ -520,13 +522,13 @@ int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull) struct nmk_gpio_chip *nmk_chip; unsigned long flags; - nmk_chip = irq_get_chip_data(NOMADIK_GPIO_TO_IRQ(gpio)); + nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; if (!nmk_chip) return -EINVAL; clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_chip->lock, flags); - __nmk_gpio_set_pull(nmk_chip, gpio - nmk_chip->chip.base, pull); + __nmk_gpio_set_pull(nmk_chip, gpio % NMK_GPIO_PER_CHIP, pull); spin_unlock_irqrestore(&nmk_chip->lock, flags); clk_disable(nmk_chip->clk); @@ -548,13 +550,13 @@ int nmk_gpio_set_mode(int gpio, int gpio_mode) struct nmk_gpio_chip *nmk_chip; unsigned long flags; - nmk_chip = irq_get_chip_data(NOMADIK_GPIO_TO_IRQ(gpio)); + nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; if (!nmk_chip) return -EINVAL; clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_chip->lock, flags); - __nmk_gpio_set_mode(nmk_chip, gpio - nmk_chip->chip.base, gpio_mode); + __nmk_gpio_set_mode(nmk_chip, gpio % NMK_GPIO_PER_CHIP, gpio_mode); spin_unlock_irqrestore(&nmk_chip->lock, flags); clk_disable(nmk_chip->clk); @@ -567,11 +569,11 @@ int nmk_gpio_get_mode(int gpio) struct nmk_gpio_chip *nmk_chip; u32 afunc, bfunc, bit; - nmk_chip = irq_get_chip_data(NOMADIK_GPIO_TO_IRQ(gpio)); + nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; if (!nmk_chip) return -EINVAL; - bit = 1 << (gpio - nmk_chip->chip.base); + bit = 1 << (gpio % NMK_GPIO_PER_CHIP); clk_enable(nmk_chip->clk); @@ -588,21 +590,19 @@ EXPORT_SYMBOL(nmk_gpio_get_mode); /* IRQ functions */ static inline int nmk_gpio_get_bitmask(int gpio) { - return 1 << (gpio % 32); + return 1 << (gpio % NMK_GPIO_PER_CHIP); } static void nmk_gpio_irq_ack(struct irq_data *d) { - int gpio; struct nmk_gpio_chip *nmk_chip; - gpio = NOMADIK_IRQ_TO_GPIO(d->irq); nmk_chip = irq_data_get_irq_chip_data(d); if (!nmk_chip) return; clk_enable(nmk_chip->clk); - writel(nmk_gpio_get_bitmask(gpio), nmk_chip->addr + NMK_GPIO_IC); + writel(nmk_gpio_get_bitmask(d->hwirq), nmk_chip->addr + NMK_GPIO_IC); clk_disable(nmk_chip->clk); } @@ -659,7 +659,7 @@ static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip, * wakeup is anyhow controlled by the RIMSC and FIMSC registers. */ if (nmk_chip->sleepmode && on) { - __nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base, + __nmk_gpio_set_slpm(nmk_chip, gpio % nmk_chip->chip.base, NMK_GPIO_SLPM_WAKEUP_ENABLE); } @@ -668,14 +668,12 @@ static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip, static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable) { - int gpio; struct nmk_gpio_chip *nmk_chip; unsigned long flags; u32 bitmask; - gpio = NOMADIK_IRQ_TO_GPIO(d->irq); nmk_chip = irq_data_get_irq_chip_data(d); - bitmask = nmk_gpio_get_bitmask(gpio); + bitmask = nmk_gpio_get_bitmask(d->hwirq); if (!nmk_chip) return -EINVAL; @@ -683,10 +681,10 @@ static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable) spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); spin_lock(&nmk_chip->lock); - __nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, enable); + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, enable); if (!(nmk_chip->real_wake & bitmask)) - __nmk_gpio_set_wake(nmk_chip, gpio, enable); + __nmk_gpio_set_wake(nmk_chip, d->hwirq, enable); spin_unlock(&nmk_chip->lock); spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); @@ -710,20 +708,18 @@ static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on) struct nmk_gpio_chip *nmk_chip; unsigned long flags; u32 bitmask; - int gpio; - gpio = NOMADIK_IRQ_TO_GPIO(d->irq); nmk_chip = irq_data_get_irq_chip_data(d); if (!nmk_chip) return -EINVAL; - bitmask = nmk_gpio_get_bitmask(gpio); + bitmask = nmk_gpio_get_bitmask(d->hwirq); clk_enable(nmk_chip->clk); spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); spin_lock(&nmk_chip->lock); if (irqd_irq_disabled(d)) - __nmk_gpio_set_wake(nmk_chip, gpio, on); + __nmk_gpio_set_wake(nmk_chip, d->hwirq, on); if (on) nmk_chip->real_wake |= bitmask; @@ -741,17 +737,14 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) { bool enabled = !irqd_irq_disabled(d); bool wake = irqd_is_wakeup_set(d); - int gpio; struct nmk_gpio_chip *nmk_chip; unsigned long flags; u32 bitmask; - gpio = NOMADIK_IRQ_TO_GPIO(d->irq); nmk_chip = irq_data_get_irq_chip_data(d); - bitmask = nmk_gpio_get_bitmask(gpio); + bitmask = nmk_gpio_get_bitmask(d->hwirq); if (!nmk_chip) return -EINVAL; - if (type & IRQ_TYPE_LEVEL_HIGH) return -EINVAL; if (type & IRQ_TYPE_LEVEL_LOW) @@ -761,10 +754,10 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) spin_lock_irqsave(&nmk_chip->lock, flags); if (enabled) - __nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, false); + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, false); if (enabled || wake) - __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, false); + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, false); nmk_chip->edge_rising &= ~bitmask; if (type & IRQ_TYPE_EDGE_RISING) @@ -775,10 +768,10 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) nmk_chip->edge_falling |= bitmask; if (enabled) - __nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, true); + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, true); if (enabled || wake) - __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, true); + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, true); spin_unlock_irqrestore(&nmk_chip->lock, flags); clk_disable(nmk_chip->clk); @@ -824,7 +817,7 @@ static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc, chained_irq_enter(host_chip, desc); nmk_chip = irq_get_handler_data(irq); - first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base); + first_irq = nmk_chip->domain->revmap_data.legacy.first_irq; while (status) { int bit = __ffs(status); @@ -858,18 +851,6 @@ static void nmk_gpio_secondary_irq_handler(unsigned int irq, static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip) { - unsigned int first_irq; - int i; - - first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base); - for (i = first_irq; i < first_irq + nmk_chip->chip.ngpio; i++) { - irq_set_chip_and_handler(i, &nmk_gpio_irq_chip, - handle_edge_irq); - set_irq_flags(i, IRQF_VALID); - irq_set_chip_data(i, nmk_chip); - irq_set_irq_type(i, IRQ_TYPE_EDGE_FALLING); - } - irq_set_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler); irq_set_handler_data(nmk_chip->parent_irq, nmk_chip); @@ -946,7 +927,7 @@ static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) struct nmk_gpio_chip *nmk_chip = container_of(chip, struct nmk_gpio_chip, chip); - return NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base) + offset; + return irq_find_mapping(nmk_chip->domain, offset); } #ifdef CONFIG_DEBUG_FS @@ -1129,6 +1110,27 @@ void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up) } } +int nmk_gpio_irq_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hwirq) +{ + struct nmk_gpio_chip *nmk_chip = d->host_data; + + if (!nmk_chip) + return -EINVAL; + + irq_set_chip_and_handler(irq, &nmk_gpio_irq_chip, handle_edge_irq); + set_irq_flags(irq, IRQF_VALID); + irq_set_chip_data(irq, nmk_chip); + irq_set_irq_type(irq, IRQ_TYPE_EDGE_FALLING); + + return 0; +} + +const struct irq_domain_ops nmk_gpio_irq_simple_ops = { + .map = nmk_gpio_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + static int __devinit nmk_gpio_probe(struct platform_device *dev) { struct nmk_gpio_platform_data *pdata = dev->dev.platform_data; @@ -1158,7 +1160,7 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) if (of_property_read_u32(np, "gpio-bank", &dev->id)) { dev_err(&dev->dev, "gpio-bank property not found\n"); ret = -EINVAL; - goto out_dt; + goto out; } pdata->first_gpio = dev->id * NMK_GPIO_PER_CHIP; @@ -1245,6 +1247,15 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev) platform_set_drvdata(dev, nmk_chip); + nmk_chip->domain = irq_domain_add_legacy(np, NMK_GPIO_PER_CHIP, + NOMADIK_GPIO_TO_IRQ(pdata->first_gpio), + 0, &nmk_gpio_irq_simple_ops, nmk_chip); + if (!nmk_chip->domain) { + pr_err("%s: Failed to create irqdomain\n", np->full_name); + ret = -ENOSYS; + goto out_free; + } + nmk_gpio_init_irq(nmk_chip); dev_info(&dev->dev, "at address %p\n", nmk_chip->addr); @@ -1263,7 +1274,6 @@ out_release: out: dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret, pdata->first_gpio, pdata->first_gpio+31); -out_dt: if (np) kfree(pdata); -- cgit v1.2.3 From 1ae4e59279b185a850ad25da4eb5a771bf36bdcb Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 26 Apr 2012 13:56:05 +0200 Subject: gpio: move the Nomadik GPIO driver to pinctrl I'm moving this driver over to the pinctrl subsystem to convert the custom pin mux/config scheme over to use pinctrl. Acked-by: Stephen Warren Signed-off-by: Linus Walleij --- drivers/gpio/Makefile | 1 - drivers/gpio/gpio-nomadik.c | 1306 ------------------------------------- drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-nomadik.c | 1306 +++++++++++++++++++++++++++++++++++++ 4 files changed, 1307 insertions(+), 1307 deletions(-) delete mode 100644 drivers/gpio/gpio-nomadik.c create mode 100644 drivers/pinctrl/pinctrl-nomadik.c (limited to 'drivers/gpio') diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 007f54bd0081..a4193ab1b266 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -36,7 +36,6 @@ obj-$(CONFIG_GPIO_MSM_V1) += gpio-msm-v1.o obj-$(CONFIG_GPIO_MSM_V2) += gpio-msm-v2.o obj-$(CONFIG_GPIO_MXC) += gpio-mxc.o obj-$(CONFIG_GPIO_MXS) += gpio-mxs.o -obj-$(CONFIG_PLAT_NOMADIK) += gpio-nomadik.o obj-$(CONFIG_ARCH_OMAP) += gpio-omap.o obj-$(CONFIG_GPIO_PCA953X) += gpio-pca953x.o obj-$(CONFIG_GPIO_PCF857X) += gpio-pcf857x.o diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c deleted file mode 100644 index 9b126b6d79cc..000000000000 --- a/drivers/gpio/gpio-nomadik.c +++ /dev/null @@ -1,1306 +0,0 @@ -/* - * Generic GPIO driver for logic cells found in the Nomadik SoC - * - * Copyright (C) 2008,2009 STMicroelectronics - * Copyright (C) 2009 Alessandro Rubini - * Rewritten based on work by Prafulla WADASKAR - * Copyright (C) 2011 Linus Walleij - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -#include -#include - -/* - * The GPIO module in the Nomadik family of Systems-on-Chip is an - * AMBA device, managing 32 pins and alternate functions. The logic block - * is currently used in the Nomadik and ux500. - * - * Symbols in this file are called "nmk_gpio" for "nomadik gpio" - */ - -#define NMK_GPIO_PER_CHIP 32 - -struct nmk_gpio_chip { - struct gpio_chip chip; - struct irq_domain *domain; - void __iomem *addr; - struct clk *clk; - unsigned int bank; - unsigned int parent_irq; - int secondary_parent_irq; - u32 (*get_secondary_status)(unsigned int bank); - void (*set_ioforce)(bool enable); - spinlock_t lock; - bool sleepmode; - /* Keep track of configured edges */ - u32 edge_rising; - u32 edge_falling; - u32 real_wake; - u32 rwimsc; - u32 fwimsc; - u32 rimsc; - u32 fimsc; - u32 pull_up; - u32 lowemi; -}; - -static struct nmk_gpio_chip * -nmk_gpio_chips[DIV_ROUND_UP(ARCH_NR_GPIOS, NMK_GPIO_PER_CHIP)]; - -static DEFINE_SPINLOCK(nmk_gpio_slpm_lock); - -#define NUM_BANKS ARRAY_SIZE(nmk_gpio_chips) - -static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip, - unsigned offset, int gpio_mode) -{ - u32 bit = 1 << offset; - u32 afunc, bfunc; - - afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit; - bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit; - if (gpio_mode & NMK_GPIO_ALT_A) - afunc |= bit; - if (gpio_mode & NMK_GPIO_ALT_B) - bfunc |= bit; - writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA); - writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB); -} - -static void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip, - unsigned offset, enum nmk_gpio_slpm mode) -{ - u32 bit = 1 << offset; - u32 slpm; - - slpm = readl(nmk_chip->addr + NMK_GPIO_SLPC); - if (mode == NMK_GPIO_SLPM_NOCHANGE) - slpm |= bit; - else - slpm &= ~bit; - writel(slpm, nmk_chip->addr + NMK_GPIO_SLPC); -} - -static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip, - unsigned offset, enum nmk_gpio_pull pull) -{ - u32 bit = 1 << offset; - u32 pdis; - - pdis = readl(nmk_chip->addr + NMK_GPIO_PDIS); - if (pull == NMK_GPIO_PULL_NONE) { - pdis |= bit; - nmk_chip->pull_up &= ~bit; - } else { - pdis &= ~bit; - } - - writel(pdis, nmk_chip->addr + NMK_GPIO_PDIS); - - if (pull == NMK_GPIO_PULL_UP) { - nmk_chip->pull_up |= bit; - writel(bit, nmk_chip->addr + NMK_GPIO_DATS); - } else if (pull == NMK_GPIO_PULL_DOWN) { - nmk_chip->pull_up &= ~bit; - writel(bit, nmk_chip->addr + NMK_GPIO_DATC); - } -} - -static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip, - unsigned offset, bool lowemi) -{ - u32 bit = BIT(offset); - bool enabled = nmk_chip->lowemi & bit; - - if (lowemi == enabled) - return; - - if (lowemi) - nmk_chip->lowemi |= bit; - else - nmk_chip->lowemi &= ~bit; - - writel_relaxed(nmk_chip->lowemi, - nmk_chip->addr + NMK_GPIO_LOWEMI); -} - -static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip, - unsigned offset) -{ - writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC); -} - -static void __nmk_gpio_set_output(struct nmk_gpio_chip *nmk_chip, - unsigned offset, int val) -{ - if (val) - writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATS); - else - writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATC); -} - -static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip, - unsigned offset, int val) -{ - writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS); - __nmk_gpio_set_output(nmk_chip, offset, val); -} - -static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip, - unsigned offset, int gpio_mode, - bool glitch) -{ - u32 rwimsc = nmk_chip->rwimsc; - u32 fwimsc = nmk_chip->fwimsc; - - if (glitch && nmk_chip->set_ioforce) { - u32 bit = BIT(offset); - - /* Prevent spurious wakeups */ - writel(rwimsc & ~bit, nmk_chip->addr + NMK_GPIO_RWIMSC); - writel(fwimsc & ~bit, nmk_chip->addr + NMK_GPIO_FWIMSC); - - nmk_chip->set_ioforce(true); - } - - __nmk_gpio_set_mode(nmk_chip, offset, gpio_mode); - - if (glitch && nmk_chip->set_ioforce) { - nmk_chip->set_ioforce(false); - - writel(rwimsc, nmk_chip->addr + NMK_GPIO_RWIMSC); - writel(fwimsc, nmk_chip->addr + NMK_GPIO_FWIMSC); - } -} - -static void -nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned offset) -{ - u32 falling = nmk_chip->fimsc & BIT(offset); - u32 rising = nmk_chip->rimsc & BIT(offset); - int gpio = nmk_chip->chip.base + offset; - int irq = NOMADIK_GPIO_TO_IRQ(gpio); - struct irq_data *d = irq_get_irq_data(irq); - - if (!rising && !falling) - return; - - if (!d || !irqd_irq_disabled(d)) - return; - - if (rising) { - nmk_chip->rimsc &= ~BIT(offset); - writel_relaxed(nmk_chip->rimsc, - nmk_chip->addr + NMK_GPIO_RIMSC); - } - - if (falling) { - nmk_chip->fimsc &= ~BIT(offset); - writel_relaxed(nmk_chip->fimsc, - nmk_chip->addr + NMK_GPIO_FIMSC); - } - - dev_dbg(nmk_chip->chip.dev, "%d: clearing interrupt mask\n", gpio); -} - -static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, - pin_cfg_t cfg, bool sleep, unsigned int *slpmregs) -{ - static const char *afnames[] = { - [NMK_GPIO_ALT_GPIO] = "GPIO", - [NMK_GPIO_ALT_A] = "A", - [NMK_GPIO_ALT_B] = "B", - [NMK_GPIO_ALT_C] = "C" - }; - static const char *pullnames[] = { - [NMK_GPIO_PULL_NONE] = "none", - [NMK_GPIO_PULL_UP] = "up", - [NMK_GPIO_PULL_DOWN] = "down", - [3] /* illegal */ = "??" - }; - static const char *slpmnames[] = { - [NMK_GPIO_SLPM_INPUT] = "input/wakeup", - [NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup", - }; - - int pin = PIN_NUM(cfg); - int pull = PIN_PULL(cfg); - int af = PIN_ALT(cfg); - int slpm = PIN_SLPM(cfg); - int output = PIN_DIR(cfg); - int val = PIN_VAL(cfg); - bool glitch = af == NMK_GPIO_ALT_C; - - dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n", - pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm], - output ? "output " : "input", - output ? (val ? "high" : "low") : ""); - - if (sleep) { - int slpm_pull = PIN_SLPM_PULL(cfg); - int slpm_output = PIN_SLPM_DIR(cfg); - int slpm_val = PIN_SLPM_VAL(cfg); - - af = NMK_GPIO_ALT_GPIO; - - /* - * The SLPM_* values are normal values + 1 to allow zero to - * mean "same as normal". - */ - if (slpm_pull) - pull = slpm_pull - 1; - if (slpm_output) - output = slpm_output - 1; - if (slpm_val) - val = slpm_val - 1; - - dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n", - pin, - slpm_pull ? pullnames[pull] : "same", - slpm_output ? (output ? "output" : "input") : "same", - slpm_val ? (val ? "high" : "low") : "same"); - } - - if (output) - __nmk_gpio_make_output(nmk_chip, offset, val); - else { - __nmk_gpio_make_input(nmk_chip, offset); - __nmk_gpio_set_pull(nmk_chip, offset, pull); - } - - __nmk_gpio_set_lowemi(nmk_chip, offset, PIN_LOWEMI(cfg)); - - /* - * If the pin is switching to altfunc, and there was an interrupt - * installed on it which has been lazy disabled, actually mask the - * interrupt to prevent spurious interrupts that would occur while the - * pin is under control of the peripheral. Only SKE does this. - */ - if (af != NMK_GPIO_ALT_GPIO) - nmk_gpio_disable_lazy_irq(nmk_chip, offset); - - /* - * If we've backed up the SLPM registers (glitch workaround), modify - * the backups since they will be restored. - */ - if (slpmregs) { - if (slpm == NMK_GPIO_SLPM_NOCHANGE) - slpmregs[nmk_chip->bank] |= BIT(offset); - else - slpmregs[nmk_chip->bank] &= ~BIT(offset); - } else - __nmk_gpio_set_slpm(nmk_chip, offset, slpm); - - __nmk_gpio_set_mode_safe(nmk_chip, offset, af, glitch); -} - -/* - * Safe sequence used to switch IOs between GPIO and Alternate-C mode: - * - Save SLPM registers - * - Set SLPM=0 for the IOs you want to switch and others to 1 - * - Configure the GPIO registers for the IOs that are being switched - * - Set IOFORCE=1 - * - Modify the AFLSA/B registers for the IOs that are being switched - * - Set IOFORCE=0 - * - Restore SLPM registers - * - Any spurious wake up event during switch sequence to be ignored and - * cleared - */ -static void nmk_gpio_glitch_slpm_init(unsigned int *slpm) -{ - int i; - - for (i = 0; i < NUM_BANKS; i++) { - struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; - unsigned int temp = slpm[i]; - - if (!chip) - break; - - clk_enable(chip->clk); - - slpm[i] = readl(chip->addr + NMK_GPIO_SLPC); - writel(temp, chip->addr + NMK_GPIO_SLPC); - } -} - -static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm) -{ - int i; - - for (i = 0; i < NUM_BANKS; i++) { - struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; - - if (!chip) - break; - - writel(slpm[i], chip->addr + NMK_GPIO_SLPC); - - clk_disable(chip->clk); - } -} - -static int __nmk_config_pins(pin_cfg_t *cfgs, int num, bool sleep) -{ - static unsigned int slpm[NUM_BANKS]; - unsigned long flags; - bool glitch = false; - int ret = 0; - int i; - - for (i = 0; i < num; i++) { - if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C) { - glitch = true; - break; - } - } - - spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); - - if (glitch) { - memset(slpm, 0xff, sizeof(slpm)); - - for (i = 0; i < num; i++) { - int pin = PIN_NUM(cfgs[i]); - int offset = pin % NMK_GPIO_PER_CHIP; - - if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C) - slpm[pin / NMK_GPIO_PER_CHIP] &= ~BIT(offset); - } - - nmk_gpio_glitch_slpm_init(slpm); - } - - for (i = 0; i < num; i++) { - struct nmk_gpio_chip *nmk_chip; - int pin = PIN_NUM(cfgs[i]); - - nmk_chip = nmk_gpio_chips[pin / NMK_GPIO_PER_CHIP]; - if (!nmk_chip) { - ret = -EINVAL; - break; - } - - clk_enable(nmk_chip->clk); - spin_lock(&nmk_chip->lock); - __nmk_config_pin(nmk_chip, pin % NMK_GPIO_PER_CHIP, - cfgs[i], sleep, glitch ? slpm : NULL); - spin_unlock(&nmk_chip->lock); - clk_disable(nmk_chip->clk); - } - - if (glitch) - nmk_gpio_glitch_slpm_restore(slpm); - - spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); - - return ret; -} - -/** - * nmk_config_pin - configure a pin's mux attributes - * @cfg: pin confguration - * - * Configures a pin's mode (alternate function or GPIO), its pull up status, - * and its sleep mode based on the specified configuration. The @cfg is - * usually one of the SoC specific macros defined in mach/-pins.h. These - * are constructed using, and can be further enhanced with, the macros in - * plat/pincfg.h. - * - * If a pin's mode is set to GPIO, it is configured as an input to avoid - * side-effects. The gpio can be manipulated later using standard GPIO API - * calls. - */ -int nmk_config_pin(pin_cfg_t cfg, bool sleep) -{ - return __nmk_config_pins(&cfg, 1, sleep); -} -EXPORT_SYMBOL(nmk_config_pin); - -/** - * nmk_config_pins - configure several pins at once - * @cfgs: array of pin configurations - * @num: number of elments in the array - * - * Configures several pins using nmk_config_pin(). Refer to that function for - * further information. - */ -int nmk_config_pins(pin_cfg_t *cfgs, int num) -{ - return __nmk_config_pins(cfgs, num, false); -} -EXPORT_SYMBOL(nmk_config_pins); - -int nmk_config_pins_sleep(pin_cfg_t *cfgs, int num) -{ - return __nmk_config_pins(cfgs, num, true); -} -EXPORT_SYMBOL(nmk_config_pins_sleep); - -/** - * nmk_gpio_set_slpm() - configure the sleep mode of a pin - * @gpio: pin number - * @mode: NMK_GPIO_SLPM_INPUT or NMK_GPIO_SLPM_NOCHANGE, - * - * This register is actually in the pinmux layer, not the GPIO block itself. - * The GPIO1B_SLPM register defines the GPIO mode when SLEEP/DEEP-SLEEP - * mode is entered (i.e. when signal IOFORCE is HIGH by the platform code). - * Each GPIO can be configured to be forced into GPIO mode when IOFORCE is - * HIGH, overriding the normal setting defined by GPIO_AFSELx registers. - * When IOFORCE returns LOW (by software, after SLEEP/DEEP-SLEEP exit), - * the GPIOs return to the normal setting defined by GPIO_AFSELx registers. - * - * If @mode is NMK_GPIO_SLPM_INPUT, the corresponding GPIO is switched to GPIO - * mode when signal IOFORCE is HIGH (i.e. when SLEEP/DEEP-SLEEP mode is - * entered) regardless of the altfunction selected. Also wake-up detection is - * ENABLED. - * - * If @mode is NMK_GPIO_SLPM_NOCHANGE, the corresponding GPIO remains - * controlled by NMK_GPIO_DATC, NMK_GPIO_DATS, NMK_GPIO_DIR, NMK_GPIO_PDIS - * (for altfunction GPIO) or respective on-chip peripherals (for other - * altfuncs) when IOFORCE is HIGH. Also wake-up detection DISABLED. - * - * Note that enable_irq_wake() will automatically enable wakeup detection. - */ -int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode) -{ - struct nmk_gpio_chip *nmk_chip; - unsigned long flags; - - nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; - if (!nmk_chip) - return -EINVAL; - - clk_enable(nmk_chip->clk); - spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); - spin_lock(&nmk_chip->lock); - - __nmk_gpio_set_slpm(nmk_chip, gpio % NMK_GPIO_PER_CHIP, mode); - - spin_unlock(&nmk_chip->lock); - spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); - clk_disable(nmk_chip->clk); - - return 0; -} - -/** - * nmk_gpio_set_pull() - enable/disable pull up/down on a gpio - * @gpio: pin number - * @pull: one of NMK_GPIO_PULL_DOWN, NMK_GPIO_PULL_UP, and NMK_GPIO_PULL_NONE - * - * Enables/disables pull up/down on a specified pin. This only takes effect if - * the pin is configured as an input (either explicitly or by the alternate - * function). - * - * NOTE: If enabling the pull up/down, the caller must ensure that the GPIO is - * configured as an input. Otherwise, due to the way the controller registers - * work, this function will change the value output on the pin. - */ -int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull) -{ - struct nmk_gpio_chip *nmk_chip; - unsigned long flags; - - nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; - if (!nmk_chip) - return -EINVAL; - - clk_enable(nmk_chip->clk); - spin_lock_irqsave(&nmk_chip->lock, flags); - __nmk_gpio_set_pull(nmk_chip, gpio % NMK_GPIO_PER_CHIP, pull); - spin_unlock_irqrestore(&nmk_chip->lock, flags); - clk_disable(nmk_chip->clk); - - return 0; -} - -/* Mode functions */ -/** - * nmk_gpio_set_mode() - set the mux mode of a gpio pin - * @gpio: pin number - * @gpio_mode: one of NMK_GPIO_ALT_GPIO, NMK_GPIO_ALT_A, - * NMK_GPIO_ALT_B, and NMK_GPIO_ALT_C - * - * Sets the mode of the specified pin to one of the alternate functions or - * plain GPIO. - */ -int nmk_gpio_set_mode(int gpio, int gpio_mode) -{ - struct nmk_gpio_chip *nmk_chip; - unsigned long flags; - - nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; - if (!nmk_chip) - return -EINVAL; - - clk_enable(nmk_chip->clk); - spin_lock_irqsave(&nmk_chip->lock, flags); - __nmk_gpio_set_mode(nmk_chip, gpio % NMK_GPIO_PER_CHIP, gpio_mode); - spin_unlock_irqrestore(&nmk_chip->lock, flags); - clk_disable(nmk_chip->clk); - - return 0; -} -EXPORT_SYMBOL(nmk_gpio_set_mode); - -int nmk_gpio_get_mode(int gpio) -{ - struct nmk_gpio_chip *nmk_chip; - u32 afunc, bfunc, bit; - - nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; - if (!nmk_chip) - return -EINVAL; - - bit = 1 << (gpio % NMK_GPIO_PER_CHIP); - - clk_enable(nmk_chip->clk); - - afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit; - bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit; - - clk_disable(nmk_chip->clk); - - return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0); -} -EXPORT_SYMBOL(nmk_gpio_get_mode); - - -/* IRQ functions */ -static inline int nmk_gpio_get_bitmask(int gpio) -{ - return 1 << (gpio % NMK_GPIO_PER_CHIP); -} - -static void nmk_gpio_irq_ack(struct irq_data *d) -{ - struct nmk_gpio_chip *nmk_chip; - - nmk_chip = irq_data_get_irq_chip_data(d); - if (!nmk_chip) - return; - - clk_enable(nmk_chip->clk); - writel(nmk_gpio_get_bitmask(d->hwirq), nmk_chip->addr + NMK_GPIO_IC); - clk_disable(nmk_chip->clk); -} - -enum nmk_gpio_irq_type { - NORMAL, - WAKE, -}; - -static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip, - int gpio, enum nmk_gpio_irq_type which, - bool enable) -{ - u32 bitmask = nmk_gpio_get_bitmask(gpio); - u32 *rimscval; - u32 *fimscval; - u32 rimscreg; - u32 fimscreg; - - if (which == NORMAL) { - rimscreg = NMK_GPIO_RIMSC; - fimscreg = NMK_GPIO_FIMSC; - rimscval = &nmk_chip->rimsc; - fimscval = &nmk_chip->fimsc; - } else { - rimscreg = NMK_GPIO_RWIMSC; - fimscreg = NMK_GPIO_FWIMSC; - rimscval = &nmk_chip->rwimsc; - fimscval = &nmk_chip->fwimsc; - } - - /* we must individually set/clear the two edges */ - if (nmk_chip->edge_rising & bitmask) { - if (enable) - *rimscval |= bitmask; - else - *rimscval &= ~bitmask; - writel(*rimscval, nmk_chip->addr + rimscreg); - } - if (nmk_chip->edge_falling & bitmask) { - if (enable) - *fimscval |= bitmask; - else - *fimscval &= ~bitmask; - writel(*fimscval, nmk_chip->addr + fimscreg); - } -} - -static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip, - int gpio, bool on) -{ - /* - * Ensure WAKEUP_ENABLE is on. No need to disable it if wakeup is - * disabled, since setting SLPM to 1 increases power consumption, and - * wakeup is anyhow controlled by the RIMSC and FIMSC registers. - */ - if (nmk_chip->sleepmode && on) { - __nmk_gpio_set_slpm(nmk_chip, gpio % nmk_chip->chip.base, - NMK_GPIO_SLPM_WAKEUP_ENABLE); - } - - __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on); -} - -static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable) -{ - struct nmk_gpio_chip *nmk_chip; - unsigned long flags; - u32 bitmask; - - nmk_chip = irq_data_get_irq_chip_data(d); - bitmask = nmk_gpio_get_bitmask(d->hwirq); - if (!nmk_chip) - return -EINVAL; - - clk_enable(nmk_chip->clk); - spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); - spin_lock(&nmk_chip->lock); - - __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, enable); - - if (!(nmk_chip->real_wake & bitmask)) - __nmk_gpio_set_wake(nmk_chip, d->hwirq, enable); - - spin_unlock(&nmk_chip->lock); - spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); - clk_disable(nmk_chip->clk); - - return 0; -} - -static void nmk_gpio_irq_mask(struct irq_data *d) -{ - nmk_gpio_irq_maskunmask(d, false); -} - -static void nmk_gpio_irq_unmask(struct irq_data *d) -{ - nmk_gpio_irq_maskunmask(d, true); -} - -static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on) -{ - struct nmk_gpio_chip *nmk_chip; - unsigned long flags; - u32 bitmask; - - nmk_chip = irq_data_get_irq_chip_data(d); - if (!nmk_chip) - return -EINVAL; - bitmask = nmk_gpio_get_bitmask(d->hwirq); - - clk_enable(nmk_chip->clk); - spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); - spin_lock(&nmk_chip->lock); - - if (irqd_irq_disabled(d)) - __nmk_gpio_set_wake(nmk_chip, d->hwirq, on); - - if (on) - nmk_chip->real_wake |= bitmask; - else - nmk_chip->real_wake &= ~bitmask; - - spin_unlock(&nmk_chip->lock); - spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); - clk_disable(nmk_chip->clk); - - return 0; -} - -static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) -{ - bool enabled = !irqd_irq_disabled(d); - bool wake = irqd_is_wakeup_set(d); - struct nmk_gpio_chip *nmk_chip; - unsigned long flags; - u32 bitmask; - - nmk_chip = irq_data_get_irq_chip_data(d); - bitmask = nmk_gpio_get_bitmask(d->hwirq); - if (!nmk_chip) - return -EINVAL; - if (type & IRQ_TYPE_LEVEL_HIGH) - return -EINVAL; - if (type & IRQ_TYPE_LEVEL_LOW) - return -EINVAL; - - clk_enable(nmk_chip->clk); - spin_lock_irqsave(&nmk_chip->lock, flags); - - if (enabled) - __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, false); - - if (enabled || wake) - __nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, false); - - nmk_chip->edge_rising &= ~bitmask; - if (type & IRQ_TYPE_EDGE_RISING) - nmk_chip->edge_rising |= bitmask; - - nmk_chip->edge_falling &= ~bitmask; - if (type & IRQ_TYPE_EDGE_FALLING) - nmk_chip->edge_falling |= bitmask; - - if (enabled) - __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, true); - - if (enabled || wake) - __nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, true); - - spin_unlock_irqrestore(&nmk_chip->lock, flags); - clk_disable(nmk_chip->clk); - - return 0; -} - -static unsigned int nmk_gpio_irq_startup(struct irq_data *d) -{ - struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d); - - clk_enable(nmk_chip->clk); - nmk_gpio_irq_unmask(d); - return 0; -} - -static void nmk_gpio_irq_shutdown(struct irq_data *d) -{ - struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d); - - nmk_gpio_irq_mask(d); - clk_disable(nmk_chip->clk); -} - -static struct irq_chip nmk_gpio_irq_chip = { - .name = "Nomadik-GPIO", - .irq_ack = nmk_gpio_irq_ack, - .irq_mask = nmk_gpio_irq_mask, - .irq_unmask = nmk_gpio_irq_unmask, - .irq_set_type = nmk_gpio_irq_set_type, - .irq_set_wake = nmk_gpio_irq_set_wake, - .irq_startup = nmk_gpio_irq_startup, - .irq_shutdown = nmk_gpio_irq_shutdown, -}; - -static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc, - u32 status) -{ - struct nmk_gpio_chip *nmk_chip; - struct irq_chip *host_chip = irq_get_chip(irq); - unsigned int first_irq; - - chained_irq_enter(host_chip, desc); - - nmk_chip = irq_get_handler_data(irq); - first_irq = nmk_chip->domain->revmap_data.legacy.first_irq; - while (status) { - int bit = __ffs(status); - - generic_handle_irq(first_irq + bit); - status &= ~BIT(bit); - } - - chained_irq_exit(host_chip, desc); -} - -static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq); - u32 status; - - clk_enable(nmk_chip->clk); - status = readl(nmk_chip->addr + NMK_GPIO_IS); - clk_disable(nmk_chip->clk); - - __nmk_gpio_irq_handler(irq, desc, status); -} - -static void nmk_gpio_secondary_irq_handler(unsigned int irq, - struct irq_desc *desc) -{ - struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq); - u32 status = nmk_chip->get_secondary_status(nmk_chip->bank); - - __nmk_gpio_irq_handler(irq, desc, status); -} - -static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip) -{ - irq_set_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler); - irq_set_handler_data(nmk_chip->parent_irq, nmk_chip); - - if (nmk_chip->secondary_parent_irq >= 0) { - irq_set_chained_handler(nmk_chip->secondary_parent_irq, - nmk_gpio_secondary_irq_handler); - irq_set_handler_data(nmk_chip->secondary_parent_irq, nmk_chip); - } - - return 0; -} - -/* I/O Functions */ -static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset) -{ - struct nmk_gpio_chip *nmk_chip = - container_of(chip, struct nmk_gpio_chip, chip); - - clk_enable(nmk_chip->clk); - - writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC); - - clk_disable(nmk_chip->clk); - - return 0; -} - -static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset) -{ - struct nmk_gpio_chip *nmk_chip = - container_of(chip, struct nmk_gpio_chip, chip); - u32 bit = 1 << offset; - int value; - - clk_enable(nmk_chip->clk); - - value = (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0; - - clk_disable(nmk_chip->clk); - - return value; -} - -static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset, - int val) -{ - struct nmk_gpio_chip *nmk_chip = - container_of(chip, struct nmk_gpio_chip, chip); - - clk_enable(nmk_chip->clk); - - __nmk_gpio_set_output(nmk_chip, offset, val); - - clk_disable(nmk_chip->clk); -} - -static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset, - int val) -{ - struct nmk_gpio_chip *nmk_chip = - container_of(chip, struct nmk_gpio_chip, chip); - - clk_enable(nmk_chip->clk); - - __nmk_gpio_make_output(nmk_chip, offset, val); - - clk_disable(nmk_chip->clk); - - return 0; -} - -static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct nmk_gpio_chip *nmk_chip = - container_of(chip, struct nmk_gpio_chip, chip); - - return irq_find_mapping(nmk_chip->domain, offset); -} - -#ifdef CONFIG_DEBUG_FS - -#include - -static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) -{ - int mode; - unsigned i; - unsigned gpio = chip->base; - int is_out; - struct nmk_gpio_chip *nmk_chip = - container_of(chip, struct nmk_gpio_chip, chip); - const char *modes[] = { - [NMK_GPIO_ALT_GPIO] = "gpio", - [NMK_GPIO_ALT_A] = "altA", - [NMK_GPIO_ALT_B] = "altB", - [NMK_GPIO_ALT_C] = "altC", - }; - - clk_enable(nmk_chip->clk); - - for (i = 0; i < chip->ngpio; i++, gpio++) { - const char *label = gpiochip_is_requested(chip, i); - bool pull; - u32 bit = 1 << i; - - is_out = readl(nmk_chip->addr + NMK_GPIO_DIR) & bit; - pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit); - mode = nmk_gpio_get_mode(gpio); - seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s", - gpio, label ?: "(none)", - is_out ? "out" : "in ", - chip->get - ? (chip->get(chip, i) ? "hi" : "lo") - : "? ", - (mode < 0) ? "unknown" : modes[mode], - pull ? "pull" : "none"); - - if (label && !is_out) { - int irq = gpio_to_irq(gpio); - struct irq_desc *desc = irq_to_desc(irq); - - /* This races with request_irq(), set_irq_type(), - * and set_irq_wake() ... but those are "rare". - */ - if (irq >= 0 && desc->action) { - char *trigger; - u32 bitmask = nmk_gpio_get_bitmask(gpio); - - if (nmk_chip->edge_rising & bitmask) - trigger = "edge-rising"; - else if (nmk_chip->edge_falling & bitmask) - trigger = "edge-falling"; - else - trigger = "edge-undefined"; - - seq_printf(s, " irq-%d %s%s", - irq, trigger, - irqd_is_wakeup_set(&desc->irq_data) - ? " wakeup" : ""); - } - } - - seq_printf(s, "\n"); - } - - clk_disable(nmk_chip->clk); -} - -#else -#define nmk_gpio_dbg_show NULL -#endif - -/* This structure is replicated for each GPIO block allocated at probe time */ -static struct gpio_chip nmk_gpio_template = { - .direction_input = nmk_gpio_make_input, - .get = nmk_gpio_get_input, - .direction_output = nmk_gpio_make_output, - .set = nmk_gpio_set_output, - .to_irq = nmk_gpio_to_irq, - .dbg_show = nmk_gpio_dbg_show, - .can_sleep = 0, -}; - -void nmk_gpio_clocks_enable(void) -{ - int i; - - for (i = 0; i < NUM_BANKS; i++) { - struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; - - if (!chip) - continue; - - clk_enable(chip->clk); - } -} - -void nmk_gpio_clocks_disable(void) -{ - int i; - - for (i = 0; i < NUM_BANKS; i++) { - struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; - - if (!chip) - continue; - - clk_disable(chip->clk); - } -} - -/* - * Called from the suspend/resume path to only keep the real wakeup interrupts - * (those that have had set_irq_wake() called on them) as wakeup interrupts, - * and not the rest of the interrupts which we needed to have as wakeups for - * cpuidle. - * - * PM ops are not used since this needs to be done at the end, after all the - * other drivers are done with their suspend callbacks. - */ -void nmk_gpio_wakeups_suspend(void) -{ - int i; - - for (i = 0; i < NUM_BANKS; i++) { - struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; - - if (!chip) - break; - - clk_enable(chip->clk); - - writel(chip->rwimsc & chip->real_wake, - chip->addr + NMK_GPIO_RWIMSC); - writel(chip->fwimsc & chip->real_wake, - chip->addr + NMK_GPIO_FWIMSC); - - clk_disable(chip->clk); - } -} - -void nmk_gpio_wakeups_resume(void) -{ - int i; - - for (i = 0; i < NUM_BANKS; i++) { - struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; - - if (!chip) - break; - - clk_enable(chip->clk); - - writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC); - writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC); - - clk_disable(chip->clk); - } -} - -/* - * Read the pull up/pull down status. - * A bit set in 'pull_up' means that pull up - * is selected if pull is enabled in PDIS register. - * Note: only pull up/down set via this driver can - * be detected due to HW limitations. - */ -void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up) -{ - if (gpio_bank < NUM_BANKS) { - struct nmk_gpio_chip *chip = nmk_gpio_chips[gpio_bank]; - - if (!chip) - return; - - *pull_up = chip->pull_up; - } -} - -int nmk_gpio_irq_map(struct irq_domain *d, unsigned int irq, - irq_hw_number_t hwirq) -{ - struct nmk_gpio_chip *nmk_chip = d->host_data; - - if (!nmk_chip) - return -EINVAL; - - irq_set_chip_and_handler(irq, &nmk_gpio_irq_chip, handle_edge_irq); - set_irq_flags(irq, IRQF_VALID); - irq_set_chip_data(irq, nmk_chip); - irq_set_irq_type(irq, IRQ_TYPE_EDGE_FALLING); - - return 0; -} - -const struct irq_domain_ops nmk_gpio_irq_simple_ops = { - .map = nmk_gpio_irq_map, - .xlate = irq_domain_xlate_twocell, -}; - -static int __devinit nmk_gpio_probe(struct platform_device *dev) -{ - struct nmk_gpio_platform_data *pdata = dev->dev.platform_data; - struct device_node *np = dev->dev.of_node; - struct nmk_gpio_chip *nmk_chip; - struct gpio_chip *chip; - struct resource *res; - struct clk *clk; - int secondary_irq; - void __iomem *base; - int irq; - int ret; - - if (!pdata && !np) { - dev_err(&dev->dev, "No platform data or device tree found\n"); - return -ENODEV; - } - - if (np) { - pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); - if (!pdata) - return -ENOMEM; - - if (of_get_property(np, "supports-sleepmode", NULL)) - pdata->supports_sleepmode = true; - - if (of_property_read_u32(np, "gpio-bank", &dev->id)) { - dev_err(&dev->dev, "gpio-bank property not found\n"); - ret = -EINVAL; - goto out; - } - - pdata->first_gpio = dev->id * NMK_GPIO_PER_CHIP; - pdata->num_gpio = NMK_GPIO_PER_CHIP; - } - - res = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!res) { - ret = -ENOENT; - goto out; - } - - irq = platform_get_irq(dev, 0); - if (irq < 0) { - ret = irq; - goto out; - } - - secondary_irq = platform_get_irq(dev, 1); - if (secondary_irq >= 0 && !pdata->get_secondary_status) { - ret = -EINVAL; - goto out; - } - - if (request_mem_region(res->start, resource_size(res), - dev_name(&dev->dev)) == NULL) { - ret = -EBUSY; - goto out; - } - - base = ioremap(res->start, resource_size(res)); - if (!base) { - ret = -ENOMEM; - goto out_release; - } - - clk = clk_get(&dev->dev, NULL); - if (IS_ERR(clk)) { - ret = PTR_ERR(clk); - goto out_unmap; - } - - nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL); - if (!nmk_chip) { - ret = -ENOMEM; - goto out_clk; - } - - /* - * The virt address in nmk_chip->addr is in the nomadik register space, - * so we can simply convert the resource address, without remapping - */ - nmk_chip->bank = dev->id; - nmk_chip->clk = clk; - nmk_chip->addr = base; - nmk_chip->chip = nmk_gpio_template; - nmk_chip->parent_irq = irq; - nmk_chip->secondary_parent_irq = secondary_irq; - nmk_chip->get_secondary_status = pdata->get_secondary_status; - nmk_chip->set_ioforce = pdata->set_ioforce; - nmk_chip->sleepmode = pdata->supports_sleepmode; - spin_lock_init(&nmk_chip->lock); - - chip = &nmk_chip->chip; - chip->base = pdata->first_gpio; - chip->ngpio = pdata->num_gpio; - chip->label = pdata->name ?: dev_name(&dev->dev); - chip->dev = &dev->dev; - chip->owner = THIS_MODULE; - - clk_enable(nmk_chip->clk); - nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI); - clk_disable(nmk_chip->clk); - - chip->of_node = np; - - ret = gpiochip_add(&nmk_chip->chip); - if (ret) - goto out_free; - - BUG_ON(nmk_chip->bank >= ARRAY_SIZE(nmk_gpio_chips)); - - nmk_gpio_chips[nmk_chip->bank] = nmk_chip; - - platform_set_drvdata(dev, nmk_chip); - - nmk_chip->domain = irq_domain_add_legacy(np, NMK_GPIO_PER_CHIP, - NOMADIK_GPIO_TO_IRQ(pdata->first_gpio), - 0, &nmk_gpio_irq_simple_ops, nmk_chip); - if (!nmk_chip->domain) { - pr_err("%s: Failed to create irqdomain\n", np->full_name); - ret = -ENOSYS; - goto out_free; - } - - nmk_gpio_init_irq(nmk_chip); - - dev_info(&dev->dev, "at address %p\n", nmk_chip->addr); - - return 0; - -out_free: - kfree(nmk_chip); -out_clk: - clk_disable(clk); - clk_put(clk); -out_unmap: - iounmap(base); -out_release: - release_mem_region(res->start, resource_size(res)); -out: - dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret, - pdata->first_gpio, pdata->first_gpio+31); - if (np) - kfree(pdata); - - return ret; -} - -static const struct of_device_id nmk_gpio_match[] = { - { .compatible = "st,nomadik-gpio", }, - {} -}; - -static struct platform_driver nmk_gpio_driver = { - .driver = { - .owner = THIS_MODULE, - .name = "gpio", - .of_match_table = nmk_gpio_match, - }, - .probe = nmk_gpio_probe, -}; - -static int __init nmk_gpio_init(void) -{ - return platform_driver_register(&nmk_gpio_driver); -} - -core_initcall(nmk_gpio_init); - -MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini"); -MODULE_DESCRIPTION("Nomadik GPIO Driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 8e3c95a02fbd..dd797caf5799 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -11,6 +11,7 @@ endif obj-$(CONFIG_GENERIC_PINCONF) += pinconf-generic.o obj-$(CONFIG_PINCTRL_PXA3xx) += pinctrl-pxa3xx.o obj-$(CONFIG_PINCTRL_MMP2) += pinctrl-mmp2.o +obj-$(CONFIG_PLAT_NOMADIK) += pinctrl-nomadik.o obj-$(CONFIG_PINCTRL_PXA168) += pinctrl-pxa168.o obj-$(CONFIG_PINCTRL_PXA910) += pinctrl-pxa910.o obj-$(CONFIG_PINCTRL_SIRF) += pinctrl-sirf.o diff --git a/drivers/pinctrl/pinctrl-nomadik.c b/drivers/pinctrl/pinctrl-nomadik.c new file mode 100644 index 000000000000..9b126b6d79cc --- /dev/null +++ b/drivers/pinctrl/pinctrl-nomadik.c @@ -0,0 +1,1306 @@ +/* + * Generic GPIO driver for logic cells found in the Nomadik SoC + * + * Copyright (C) 2008,2009 STMicroelectronics + * Copyright (C) 2009 Alessandro Rubini + * Rewritten based on work by Prafulla WADASKAR + * Copyright (C) 2011 Linus Walleij + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include + +/* + * The GPIO module in the Nomadik family of Systems-on-Chip is an + * AMBA device, managing 32 pins and alternate functions. The logic block + * is currently used in the Nomadik and ux500. + * + * Symbols in this file are called "nmk_gpio" for "nomadik gpio" + */ + +#define NMK_GPIO_PER_CHIP 32 + +struct nmk_gpio_chip { + struct gpio_chip chip; + struct irq_domain *domain; + void __iomem *addr; + struct clk *clk; + unsigned int bank; + unsigned int parent_irq; + int secondary_parent_irq; + u32 (*get_secondary_status)(unsigned int bank); + void (*set_ioforce)(bool enable); + spinlock_t lock; + bool sleepmode; + /* Keep track of configured edges */ + u32 edge_rising; + u32 edge_falling; + u32 real_wake; + u32 rwimsc; + u32 fwimsc; + u32 rimsc; + u32 fimsc; + u32 pull_up; + u32 lowemi; +}; + +static struct nmk_gpio_chip * +nmk_gpio_chips[DIV_ROUND_UP(ARCH_NR_GPIOS, NMK_GPIO_PER_CHIP)]; + +static DEFINE_SPINLOCK(nmk_gpio_slpm_lock); + +#define NUM_BANKS ARRAY_SIZE(nmk_gpio_chips) + +static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip, + unsigned offset, int gpio_mode) +{ + u32 bit = 1 << offset; + u32 afunc, bfunc; + + afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit; + bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit; + if (gpio_mode & NMK_GPIO_ALT_A) + afunc |= bit; + if (gpio_mode & NMK_GPIO_ALT_B) + bfunc |= bit; + writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA); + writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB); +} + +static void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip, + unsigned offset, enum nmk_gpio_slpm mode) +{ + u32 bit = 1 << offset; + u32 slpm; + + slpm = readl(nmk_chip->addr + NMK_GPIO_SLPC); + if (mode == NMK_GPIO_SLPM_NOCHANGE) + slpm |= bit; + else + slpm &= ~bit; + writel(slpm, nmk_chip->addr + NMK_GPIO_SLPC); +} + +static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip, + unsigned offset, enum nmk_gpio_pull pull) +{ + u32 bit = 1 << offset; + u32 pdis; + + pdis = readl(nmk_chip->addr + NMK_GPIO_PDIS); + if (pull == NMK_GPIO_PULL_NONE) { + pdis |= bit; + nmk_chip->pull_up &= ~bit; + } else { + pdis &= ~bit; + } + + writel(pdis, nmk_chip->addr + NMK_GPIO_PDIS); + + if (pull == NMK_GPIO_PULL_UP) { + nmk_chip->pull_up |= bit; + writel(bit, nmk_chip->addr + NMK_GPIO_DATS); + } else if (pull == NMK_GPIO_PULL_DOWN) { + nmk_chip->pull_up &= ~bit; + writel(bit, nmk_chip->addr + NMK_GPIO_DATC); + } +} + +static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip, + unsigned offset, bool lowemi) +{ + u32 bit = BIT(offset); + bool enabled = nmk_chip->lowemi & bit; + + if (lowemi == enabled) + return; + + if (lowemi) + nmk_chip->lowemi |= bit; + else + nmk_chip->lowemi &= ~bit; + + writel_relaxed(nmk_chip->lowemi, + nmk_chip->addr + NMK_GPIO_LOWEMI); +} + +static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip, + unsigned offset) +{ + writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC); +} + +static void __nmk_gpio_set_output(struct nmk_gpio_chip *nmk_chip, + unsigned offset, int val) +{ + if (val) + writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATS); + else + writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATC); +} + +static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip, + unsigned offset, int val) +{ + writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS); + __nmk_gpio_set_output(nmk_chip, offset, val); +} + +static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip, + unsigned offset, int gpio_mode, + bool glitch) +{ + u32 rwimsc = nmk_chip->rwimsc; + u32 fwimsc = nmk_chip->fwimsc; + + if (glitch && nmk_chip->set_ioforce) { + u32 bit = BIT(offset); + + /* Prevent spurious wakeups */ + writel(rwimsc & ~bit, nmk_chip->addr + NMK_GPIO_RWIMSC); + writel(fwimsc & ~bit, nmk_chip->addr + NMK_GPIO_FWIMSC); + + nmk_chip->set_ioforce(true); + } + + __nmk_gpio_set_mode(nmk_chip, offset, gpio_mode); + + if (glitch && nmk_chip->set_ioforce) { + nmk_chip->set_ioforce(false); + + writel(rwimsc, nmk_chip->addr + NMK_GPIO_RWIMSC); + writel(fwimsc, nmk_chip->addr + NMK_GPIO_FWIMSC); + } +} + +static void +nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned offset) +{ + u32 falling = nmk_chip->fimsc & BIT(offset); + u32 rising = nmk_chip->rimsc & BIT(offset); + int gpio = nmk_chip->chip.base + offset; + int irq = NOMADIK_GPIO_TO_IRQ(gpio); + struct irq_data *d = irq_get_irq_data(irq); + + if (!rising && !falling) + return; + + if (!d || !irqd_irq_disabled(d)) + return; + + if (rising) { + nmk_chip->rimsc &= ~BIT(offset); + writel_relaxed(nmk_chip->rimsc, + nmk_chip->addr + NMK_GPIO_RIMSC); + } + + if (falling) { + nmk_chip->fimsc &= ~BIT(offset); + writel_relaxed(nmk_chip->fimsc, + nmk_chip->addr + NMK_GPIO_FIMSC); + } + + dev_dbg(nmk_chip->chip.dev, "%d: clearing interrupt mask\n", gpio); +} + +static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, + pin_cfg_t cfg, bool sleep, unsigned int *slpmregs) +{ + static const char *afnames[] = { + [NMK_GPIO_ALT_GPIO] = "GPIO", + [NMK_GPIO_ALT_A] = "A", + [NMK_GPIO_ALT_B] = "B", + [NMK_GPIO_ALT_C] = "C" + }; + static const char *pullnames[] = { + [NMK_GPIO_PULL_NONE] = "none", + [NMK_GPIO_PULL_UP] = "up", + [NMK_GPIO_PULL_DOWN] = "down", + [3] /* illegal */ = "??" + }; + static const char *slpmnames[] = { + [NMK_GPIO_SLPM_INPUT] = "input/wakeup", + [NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup", + }; + + int pin = PIN_NUM(cfg); + int pull = PIN_PULL(cfg); + int af = PIN_ALT(cfg); + int slpm = PIN_SLPM(cfg); + int output = PIN_DIR(cfg); + int val = PIN_VAL(cfg); + bool glitch = af == NMK_GPIO_ALT_C; + + dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n", + pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm], + output ? "output " : "input", + output ? (val ? "high" : "low") : ""); + + if (sleep) { + int slpm_pull = PIN_SLPM_PULL(cfg); + int slpm_output = PIN_SLPM_DIR(cfg); + int slpm_val = PIN_SLPM_VAL(cfg); + + af = NMK_GPIO_ALT_GPIO; + + /* + * The SLPM_* values are normal values + 1 to allow zero to + * mean "same as normal". + */ + if (slpm_pull) + pull = slpm_pull - 1; + if (slpm_output) + output = slpm_output - 1; + if (slpm_val) + val = slpm_val - 1; + + dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n", + pin, + slpm_pull ? pullnames[pull] : "same", + slpm_output ? (output ? "output" : "input") : "same", + slpm_val ? (val ? "high" : "low") : "same"); + } + + if (output) + __nmk_gpio_make_output(nmk_chip, offset, val); + else { + __nmk_gpio_make_input(nmk_chip, offset); + __nmk_gpio_set_pull(nmk_chip, offset, pull); + } + + __nmk_gpio_set_lowemi(nmk_chip, offset, PIN_LOWEMI(cfg)); + + /* + * If the pin is switching to altfunc, and there was an interrupt + * installed on it which has been lazy disabled, actually mask the + * interrupt to prevent spurious interrupts that would occur while the + * pin is under control of the peripheral. Only SKE does this. + */ + if (af != NMK_GPIO_ALT_GPIO) + nmk_gpio_disable_lazy_irq(nmk_chip, offset); + + /* + * If we've backed up the SLPM registers (glitch workaround), modify + * the backups since they will be restored. + */ + if (slpmregs) { + if (slpm == NMK_GPIO_SLPM_NOCHANGE) + slpmregs[nmk_chip->bank] |= BIT(offset); + else + slpmregs[nmk_chip->bank] &= ~BIT(offset); + } else + __nmk_gpio_set_slpm(nmk_chip, offset, slpm); + + __nmk_gpio_set_mode_safe(nmk_chip, offset, af, glitch); +} + +/* + * Safe sequence used to switch IOs between GPIO and Alternate-C mode: + * - Save SLPM registers + * - Set SLPM=0 for the IOs you want to switch and others to 1 + * - Configure the GPIO registers for the IOs that are being switched + * - Set IOFORCE=1 + * - Modify the AFLSA/B registers for the IOs that are being switched + * - Set IOFORCE=0 + * - Restore SLPM registers + * - Any spurious wake up event during switch sequence to be ignored and + * cleared + */ +static void nmk_gpio_glitch_slpm_init(unsigned int *slpm) +{ + int i; + + for (i = 0; i < NUM_BANKS; i++) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; + unsigned int temp = slpm[i]; + + if (!chip) + break; + + clk_enable(chip->clk); + + slpm[i] = readl(chip->addr + NMK_GPIO_SLPC); + writel(temp, chip->addr + NMK_GPIO_SLPC); + } +} + +static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm) +{ + int i; + + for (i = 0; i < NUM_BANKS; i++) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; + + if (!chip) + break; + + writel(slpm[i], chip->addr + NMK_GPIO_SLPC); + + clk_disable(chip->clk); + } +} + +static int __nmk_config_pins(pin_cfg_t *cfgs, int num, bool sleep) +{ + static unsigned int slpm[NUM_BANKS]; + unsigned long flags; + bool glitch = false; + int ret = 0; + int i; + + for (i = 0; i < num; i++) { + if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C) { + glitch = true; + break; + } + } + + spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); + + if (glitch) { + memset(slpm, 0xff, sizeof(slpm)); + + for (i = 0; i < num; i++) { + int pin = PIN_NUM(cfgs[i]); + int offset = pin % NMK_GPIO_PER_CHIP; + + if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C) + slpm[pin / NMK_GPIO_PER_CHIP] &= ~BIT(offset); + } + + nmk_gpio_glitch_slpm_init(slpm); + } + + for (i = 0; i < num; i++) { + struct nmk_gpio_chip *nmk_chip; + int pin = PIN_NUM(cfgs[i]); + + nmk_chip = nmk_gpio_chips[pin / NMK_GPIO_PER_CHIP]; + if (!nmk_chip) { + ret = -EINVAL; + break; + } + + clk_enable(nmk_chip->clk); + spin_lock(&nmk_chip->lock); + __nmk_config_pin(nmk_chip, pin % NMK_GPIO_PER_CHIP, + cfgs[i], sleep, glitch ? slpm : NULL); + spin_unlock(&nmk_chip->lock); + clk_disable(nmk_chip->clk); + } + + if (glitch) + nmk_gpio_glitch_slpm_restore(slpm); + + spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); + + return ret; +} + +/** + * nmk_config_pin - configure a pin's mux attributes + * @cfg: pin confguration + * + * Configures a pin's mode (alternate function or GPIO), its pull up status, + * and its sleep mode based on the specified configuration. The @cfg is + * usually one of the SoC specific macros defined in mach/-pins.h. These + * are constructed using, and can be further enhanced with, the macros in + * plat/pincfg.h. + * + * If a pin's mode is set to GPIO, it is configured as an input to avoid + * side-effects. The gpio can be manipulated later using standard GPIO API + * calls. + */ +int nmk_config_pin(pin_cfg_t cfg, bool sleep) +{ + return __nmk_config_pins(&cfg, 1, sleep); +} +EXPORT_SYMBOL(nmk_config_pin); + +/** + * nmk_config_pins - configure several pins at once + * @cfgs: array of pin configurations + * @num: number of elments in the array + * + * Configures several pins using nmk_config_pin(). Refer to that function for + * further information. + */ +int nmk_config_pins(pin_cfg_t *cfgs, int num) +{ + return __nmk_config_pins(cfgs, num, false); +} +EXPORT_SYMBOL(nmk_config_pins); + +int nmk_config_pins_sleep(pin_cfg_t *cfgs, int num) +{ + return __nmk_config_pins(cfgs, num, true); +} +EXPORT_SYMBOL(nmk_config_pins_sleep); + +/** + * nmk_gpio_set_slpm() - configure the sleep mode of a pin + * @gpio: pin number + * @mode: NMK_GPIO_SLPM_INPUT or NMK_GPIO_SLPM_NOCHANGE, + * + * This register is actually in the pinmux layer, not the GPIO block itself. + * The GPIO1B_SLPM register defines the GPIO mode when SLEEP/DEEP-SLEEP + * mode is entered (i.e. when signal IOFORCE is HIGH by the platform code). + * Each GPIO can be configured to be forced into GPIO mode when IOFORCE is + * HIGH, overriding the normal setting defined by GPIO_AFSELx registers. + * When IOFORCE returns LOW (by software, after SLEEP/DEEP-SLEEP exit), + * the GPIOs return to the normal setting defined by GPIO_AFSELx registers. + * + * If @mode is NMK_GPIO_SLPM_INPUT, the corresponding GPIO is switched to GPIO + * mode when signal IOFORCE is HIGH (i.e. when SLEEP/DEEP-SLEEP mode is + * entered) regardless of the altfunction selected. Also wake-up detection is + * ENABLED. + * + * If @mode is NMK_GPIO_SLPM_NOCHANGE, the corresponding GPIO remains + * controlled by NMK_GPIO_DATC, NMK_GPIO_DATS, NMK_GPIO_DIR, NMK_GPIO_PDIS + * (for altfunction GPIO) or respective on-chip peripherals (for other + * altfuncs) when IOFORCE is HIGH. Also wake-up detection DISABLED. + * + * Note that enable_irq_wake() will automatically enable wakeup detection. + */ +int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode) +{ + struct nmk_gpio_chip *nmk_chip; + unsigned long flags; + + nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; + if (!nmk_chip) + return -EINVAL; + + clk_enable(nmk_chip->clk); + spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); + spin_lock(&nmk_chip->lock); + + __nmk_gpio_set_slpm(nmk_chip, gpio % NMK_GPIO_PER_CHIP, mode); + + spin_unlock(&nmk_chip->lock); + spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); + clk_disable(nmk_chip->clk); + + return 0; +} + +/** + * nmk_gpio_set_pull() - enable/disable pull up/down on a gpio + * @gpio: pin number + * @pull: one of NMK_GPIO_PULL_DOWN, NMK_GPIO_PULL_UP, and NMK_GPIO_PULL_NONE + * + * Enables/disables pull up/down on a specified pin. This only takes effect if + * the pin is configured as an input (either explicitly or by the alternate + * function). + * + * NOTE: If enabling the pull up/down, the caller must ensure that the GPIO is + * configured as an input. Otherwise, due to the way the controller registers + * work, this function will change the value output on the pin. + */ +int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull) +{ + struct nmk_gpio_chip *nmk_chip; + unsigned long flags; + + nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; + if (!nmk_chip) + return -EINVAL; + + clk_enable(nmk_chip->clk); + spin_lock_irqsave(&nmk_chip->lock, flags); + __nmk_gpio_set_pull(nmk_chip, gpio % NMK_GPIO_PER_CHIP, pull); + spin_unlock_irqrestore(&nmk_chip->lock, flags); + clk_disable(nmk_chip->clk); + + return 0; +} + +/* Mode functions */ +/** + * nmk_gpio_set_mode() - set the mux mode of a gpio pin + * @gpio: pin number + * @gpio_mode: one of NMK_GPIO_ALT_GPIO, NMK_GPIO_ALT_A, + * NMK_GPIO_ALT_B, and NMK_GPIO_ALT_C + * + * Sets the mode of the specified pin to one of the alternate functions or + * plain GPIO. + */ +int nmk_gpio_set_mode(int gpio, int gpio_mode) +{ + struct nmk_gpio_chip *nmk_chip; + unsigned long flags; + + nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; + if (!nmk_chip) + return -EINVAL; + + clk_enable(nmk_chip->clk); + spin_lock_irqsave(&nmk_chip->lock, flags); + __nmk_gpio_set_mode(nmk_chip, gpio % NMK_GPIO_PER_CHIP, gpio_mode); + spin_unlock_irqrestore(&nmk_chip->lock, flags); + clk_disable(nmk_chip->clk); + + return 0; +} +EXPORT_SYMBOL(nmk_gpio_set_mode); + +int nmk_gpio_get_mode(int gpio) +{ + struct nmk_gpio_chip *nmk_chip; + u32 afunc, bfunc, bit; + + nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; + if (!nmk_chip) + return -EINVAL; + + bit = 1 << (gpio % NMK_GPIO_PER_CHIP); + + clk_enable(nmk_chip->clk); + + afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit; + bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit; + + clk_disable(nmk_chip->clk); + + return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0); +} +EXPORT_SYMBOL(nmk_gpio_get_mode); + + +/* IRQ functions */ +static inline int nmk_gpio_get_bitmask(int gpio) +{ + return 1 << (gpio % NMK_GPIO_PER_CHIP); +} + +static void nmk_gpio_irq_ack(struct irq_data *d) +{ + struct nmk_gpio_chip *nmk_chip; + + nmk_chip = irq_data_get_irq_chip_data(d); + if (!nmk_chip) + return; + + clk_enable(nmk_chip->clk); + writel(nmk_gpio_get_bitmask(d->hwirq), nmk_chip->addr + NMK_GPIO_IC); + clk_disable(nmk_chip->clk); +} + +enum nmk_gpio_irq_type { + NORMAL, + WAKE, +}; + +static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip, + int gpio, enum nmk_gpio_irq_type which, + bool enable) +{ + u32 bitmask = nmk_gpio_get_bitmask(gpio); + u32 *rimscval; + u32 *fimscval; + u32 rimscreg; + u32 fimscreg; + + if (which == NORMAL) { + rimscreg = NMK_GPIO_RIMSC; + fimscreg = NMK_GPIO_FIMSC; + rimscval = &nmk_chip->rimsc; + fimscval = &nmk_chip->fimsc; + } else { + rimscreg = NMK_GPIO_RWIMSC; + fimscreg = NMK_GPIO_FWIMSC; + rimscval = &nmk_chip->rwimsc; + fimscval = &nmk_chip->fwimsc; + } + + /* we must individually set/clear the two edges */ + if (nmk_chip->edge_rising & bitmask) { + if (enable) + *rimscval |= bitmask; + else + *rimscval &= ~bitmask; + writel(*rimscval, nmk_chip->addr + rimscreg); + } + if (nmk_chip->edge_falling & bitmask) { + if (enable) + *fimscval |= bitmask; + else + *fimscval &= ~bitmask; + writel(*fimscval, nmk_chip->addr + fimscreg); + } +} + +static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip, + int gpio, bool on) +{ + /* + * Ensure WAKEUP_ENABLE is on. No need to disable it if wakeup is + * disabled, since setting SLPM to 1 increases power consumption, and + * wakeup is anyhow controlled by the RIMSC and FIMSC registers. + */ + if (nmk_chip->sleepmode && on) { + __nmk_gpio_set_slpm(nmk_chip, gpio % nmk_chip->chip.base, + NMK_GPIO_SLPM_WAKEUP_ENABLE); + } + + __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on); +} + +static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable) +{ + struct nmk_gpio_chip *nmk_chip; + unsigned long flags; + u32 bitmask; + + nmk_chip = irq_data_get_irq_chip_data(d); + bitmask = nmk_gpio_get_bitmask(d->hwirq); + if (!nmk_chip) + return -EINVAL; + + clk_enable(nmk_chip->clk); + spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); + spin_lock(&nmk_chip->lock); + + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, enable); + + if (!(nmk_chip->real_wake & bitmask)) + __nmk_gpio_set_wake(nmk_chip, d->hwirq, enable); + + spin_unlock(&nmk_chip->lock); + spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); + clk_disable(nmk_chip->clk); + + return 0; +} + +static void nmk_gpio_irq_mask(struct irq_data *d) +{ + nmk_gpio_irq_maskunmask(d, false); +} + +static void nmk_gpio_irq_unmask(struct irq_data *d) +{ + nmk_gpio_irq_maskunmask(d, true); +} + +static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on) +{ + struct nmk_gpio_chip *nmk_chip; + unsigned long flags; + u32 bitmask; + + nmk_chip = irq_data_get_irq_chip_data(d); + if (!nmk_chip) + return -EINVAL; + bitmask = nmk_gpio_get_bitmask(d->hwirq); + + clk_enable(nmk_chip->clk); + spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); + spin_lock(&nmk_chip->lock); + + if (irqd_irq_disabled(d)) + __nmk_gpio_set_wake(nmk_chip, d->hwirq, on); + + if (on) + nmk_chip->real_wake |= bitmask; + else + nmk_chip->real_wake &= ~bitmask; + + spin_unlock(&nmk_chip->lock); + spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); + clk_disable(nmk_chip->clk); + + return 0; +} + +static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) +{ + bool enabled = !irqd_irq_disabled(d); + bool wake = irqd_is_wakeup_set(d); + struct nmk_gpio_chip *nmk_chip; + unsigned long flags; + u32 bitmask; + + nmk_chip = irq_data_get_irq_chip_data(d); + bitmask = nmk_gpio_get_bitmask(d->hwirq); + if (!nmk_chip) + return -EINVAL; + if (type & IRQ_TYPE_LEVEL_HIGH) + return -EINVAL; + if (type & IRQ_TYPE_LEVEL_LOW) + return -EINVAL; + + clk_enable(nmk_chip->clk); + spin_lock_irqsave(&nmk_chip->lock, flags); + + if (enabled) + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, false); + + if (enabled || wake) + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, false); + + nmk_chip->edge_rising &= ~bitmask; + if (type & IRQ_TYPE_EDGE_RISING) + nmk_chip->edge_rising |= bitmask; + + nmk_chip->edge_falling &= ~bitmask; + if (type & IRQ_TYPE_EDGE_FALLING) + nmk_chip->edge_falling |= bitmask; + + if (enabled) + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, true); + + if (enabled || wake) + __nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, true); + + spin_unlock_irqrestore(&nmk_chip->lock, flags); + clk_disable(nmk_chip->clk); + + return 0; +} + +static unsigned int nmk_gpio_irq_startup(struct irq_data *d) +{ + struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d); + + clk_enable(nmk_chip->clk); + nmk_gpio_irq_unmask(d); + return 0; +} + +static void nmk_gpio_irq_shutdown(struct irq_data *d) +{ + struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d); + + nmk_gpio_irq_mask(d); + clk_disable(nmk_chip->clk); +} + +static struct irq_chip nmk_gpio_irq_chip = { + .name = "Nomadik-GPIO", + .irq_ack = nmk_gpio_irq_ack, + .irq_mask = nmk_gpio_irq_mask, + .irq_unmask = nmk_gpio_irq_unmask, + .irq_set_type = nmk_gpio_irq_set_type, + .irq_set_wake = nmk_gpio_irq_set_wake, + .irq_startup = nmk_gpio_irq_startup, + .irq_shutdown = nmk_gpio_irq_shutdown, +}; + +static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc, + u32 status) +{ + struct nmk_gpio_chip *nmk_chip; + struct irq_chip *host_chip = irq_get_chip(irq); + unsigned int first_irq; + + chained_irq_enter(host_chip, desc); + + nmk_chip = irq_get_handler_data(irq); + first_irq = nmk_chip->domain->revmap_data.legacy.first_irq; + while (status) { + int bit = __ffs(status); + + generic_handle_irq(first_irq + bit); + status &= ~BIT(bit); + } + + chained_irq_exit(host_chip, desc); +} + +static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) +{ + struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq); + u32 status; + + clk_enable(nmk_chip->clk); + status = readl(nmk_chip->addr + NMK_GPIO_IS); + clk_disable(nmk_chip->clk); + + __nmk_gpio_irq_handler(irq, desc, status); +} + +static void nmk_gpio_secondary_irq_handler(unsigned int irq, + struct irq_desc *desc) +{ + struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq); + u32 status = nmk_chip->get_secondary_status(nmk_chip->bank); + + __nmk_gpio_irq_handler(irq, desc, status); +} + +static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip) +{ + irq_set_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler); + irq_set_handler_data(nmk_chip->parent_irq, nmk_chip); + + if (nmk_chip->secondary_parent_irq >= 0) { + irq_set_chained_handler(nmk_chip->secondary_parent_irq, + nmk_gpio_secondary_irq_handler); + irq_set_handler_data(nmk_chip->secondary_parent_irq, nmk_chip); + } + + return 0; +} + +/* I/O Functions */ +static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset) +{ + struct nmk_gpio_chip *nmk_chip = + container_of(chip, struct nmk_gpio_chip, chip); + + clk_enable(nmk_chip->clk); + + writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC); + + clk_disable(nmk_chip->clk); + + return 0; +} + +static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset) +{ + struct nmk_gpio_chip *nmk_chip = + container_of(chip, struct nmk_gpio_chip, chip); + u32 bit = 1 << offset; + int value; + + clk_enable(nmk_chip->clk); + + value = (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0; + + clk_disable(nmk_chip->clk); + + return value; +} + +static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset, + int val) +{ + struct nmk_gpio_chip *nmk_chip = + container_of(chip, struct nmk_gpio_chip, chip); + + clk_enable(nmk_chip->clk); + + __nmk_gpio_set_output(nmk_chip, offset, val); + + clk_disable(nmk_chip->clk); +} + +static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset, + int val) +{ + struct nmk_gpio_chip *nmk_chip = + container_of(chip, struct nmk_gpio_chip, chip); + + clk_enable(nmk_chip->clk); + + __nmk_gpio_make_output(nmk_chip, offset, val); + + clk_disable(nmk_chip->clk); + + return 0; +} + +static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) +{ + struct nmk_gpio_chip *nmk_chip = + container_of(chip, struct nmk_gpio_chip, chip); + + return irq_find_mapping(nmk_chip->domain, offset); +} + +#ifdef CONFIG_DEBUG_FS + +#include + +static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) +{ + int mode; + unsigned i; + unsigned gpio = chip->base; + int is_out; + struct nmk_gpio_chip *nmk_chip = + container_of(chip, struct nmk_gpio_chip, chip); + const char *modes[] = { + [NMK_GPIO_ALT_GPIO] = "gpio", + [NMK_GPIO_ALT_A] = "altA", + [NMK_GPIO_ALT_B] = "altB", + [NMK_GPIO_ALT_C] = "altC", + }; + + clk_enable(nmk_chip->clk); + + for (i = 0; i < chip->ngpio; i++, gpio++) { + const char *label = gpiochip_is_requested(chip, i); + bool pull; + u32 bit = 1 << i; + + is_out = readl(nmk_chip->addr + NMK_GPIO_DIR) & bit; + pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit); + mode = nmk_gpio_get_mode(gpio); + seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s", + gpio, label ?: "(none)", + is_out ? "out" : "in ", + chip->get + ? (chip->get(chip, i) ? "hi" : "lo") + : "? ", + (mode < 0) ? "unknown" : modes[mode], + pull ? "pull" : "none"); + + if (label && !is_out) { + int irq = gpio_to_irq(gpio); + struct irq_desc *desc = irq_to_desc(irq); + + /* This races with request_irq(), set_irq_type(), + * and set_irq_wake() ... but those are "rare". + */ + if (irq >= 0 && desc->action) { + char *trigger; + u32 bitmask = nmk_gpio_get_bitmask(gpio); + + if (nmk_chip->edge_rising & bitmask) + trigger = "edge-rising"; + else if (nmk_chip->edge_falling & bitmask) + trigger = "edge-falling"; + else + trigger = "edge-undefined"; + + seq_printf(s, " irq-%d %s%s", + irq, trigger, + irqd_is_wakeup_set(&desc->irq_data) + ? " wakeup" : ""); + } + } + + seq_printf(s, "\n"); + } + + clk_disable(nmk_chip->clk); +} + +#else +#define nmk_gpio_dbg_show NULL +#endif + +/* This structure is replicated for each GPIO block allocated at probe time */ +static struct gpio_chip nmk_gpio_template = { + .direction_input = nmk_gpio_make_input, + .get = nmk_gpio_get_input, + .direction_output = nmk_gpio_make_output, + .set = nmk_gpio_set_output, + .to_irq = nmk_gpio_to_irq, + .dbg_show = nmk_gpio_dbg_show, + .can_sleep = 0, +}; + +void nmk_gpio_clocks_enable(void) +{ + int i; + + for (i = 0; i < NUM_BANKS; i++) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; + + if (!chip) + continue; + + clk_enable(chip->clk); + } +} + +void nmk_gpio_clocks_disable(void) +{ + int i; + + for (i = 0; i < NUM_BANKS; i++) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; + + if (!chip) + continue; + + clk_disable(chip->clk); + } +} + +/* + * Called from the suspend/resume path to only keep the real wakeup interrupts + * (those that have had set_irq_wake() called on them) as wakeup interrupts, + * and not the rest of the interrupts which we needed to have as wakeups for + * cpuidle. + * + * PM ops are not used since this needs to be done at the end, after all the + * other drivers are done with their suspend callbacks. + */ +void nmk_gpio_wakeups_suspend(void) +{ + int i; + + for (i = 0; i < NUM_BANKS; i++) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; + + if (!chip) + break; + + clk_enable(chip->clk); + + writel(chip->rwimsc & chip->real_wake, + chip->addr + NMK_GPIO_RWIMSC); + writel(chip->fwimsc & chip->real_wake, + chip->addr + NMK_GPIO_FWIMSC); + + clk_disable(chip->clk); + } +} + +void nmk_gpio_wakeups_resume(void) +{ + int i; + + for (i = 0; i < NUM_BANKS; i++) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; + + if (!chip) + break; + + clk_enable(chip->clk); + + writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC); + writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC); + + clk_disable(chip->clk); + } +} + +/* + * Read the pull up/pull down status. + * A bit set in 'pull_up' means that pull up + * is selected if pull is enabled in PDIS register. + * Note: only pull up/down set via this driver can + * be detected due to HW limitations. + */ +void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up) +{ + if (gpio_bank < NUM_BANKS) { + struct nmk_gpio_chip *chip = nmk_gpio_chips[gpio_bank]; + + if (!chip) + return; + + *pull_up = chip->pull_up; + } +} + +int nmk_gpio_irq_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hwirq) +{ + struct nmk_gpio_chip *nmk_chip = d->host_data; + + if (!nmk_chip) + return -EINVAL; + + irq_set_chip_and_handler(irq, &nmk_gpio_irq_chip, handle_edge_irq); + set_irq_flags(irq, IRQF_VALID); + irq_set_chip_data(irq, nmk_chip); + irq_set_irq_type(irq, IRQ_TYPE_EDGE_FALLING); + + return 0; +} + +const struct irq_domain_ops nmk_gpio_irq_simple_ops = { + .map = nmk_gpio_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + +static int __devinit nmk_gpio_probe(struct platform_device *dev) +{ + struct nmk_gpio_platform_data *pdata = dev->dev.platform_data; + struct device_node *np = dev->dev.of_node; + struct nmk_gpio_chip *nmk_chip; + struct gpio_chip *chip; + struct resource *res; + struct clk *clk; + int secondary_irq; + void __iomem *base; + int irq; + int ret; + + if (!pdata && !np) { + dev_err(&dev->dev, "No platform data or device tree found\n"); + return -ENODEV; + } + + if (np) { + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + if (of_get_property(np, "supports-sleepmode", NULL)) + pdata->supports_sleepmode = true; + + if (of_property_read_u32(np, "gpio-bank", &dev->id)) { + dev_err(&dev->dev, "gpio-bank property not found\n"); + ret = -EINVAL; + goto out; + } + + pdata->first_gpio = dev->id * NMK_GPIO_PER_CHIP; + pdata->num_gpio = NMK_GPIO_PER_CHIP; + } + + res = platform_get_resource(dev, IORESOURCE_MEM, 0); + if (!res) { + ret = -ENOENT; + goto out; + } + + irq = platform_get_irq(dev, 0); + if (irq < 0) { + ret = irq; + goto out; + } + + secondary_irq = platform_get_irq(dev, 1); + if (secondary_irq >= 0 && !pdata->get_secondary_status) { + ret = -EINVAL; + goto out; + } + + if (request_mem_region(res->start, resource_size(res), + dev_name(&dev->dev)) == NULL) { + ret = -EBUSY; + goto out; + } + + base = ioremap(res->start, resource_size(res)); + if (!base) { + ret = -ENOMEM; + goto out_release; + } + + clk = clk_get(&dev->dev, NULL); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + goto out_unmap; + } + + nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL); + if (!nmk_chip) { + ret = -ENOMEM; + goto out_clk; + } + + /* + * The virt address in nmk_chip->addr is in the nomadik register space, + * so we can simply convert the resource address, without remapping + */ + nmk_chip->bank = dev->id; + nmk_chip->clk = clk; + nmk_chip->addr = base; + nmk_chip->chip = nmk_gpio_template; + nmk_chip->parent_irq = irq; + nmk_chip->secondary_parent_irq = secondary_irq; + nmk_chip->get_secondary_status = pdata->get_secondary_status; + nmk_chip->set_ioforce = pdata->set_ioforce; + nmk_chip->sleepmode = pdata->supports_sleepmode; + spin_lock_init(&nmk_chip->lock); + + chip = &nmk_chip->chip; + chip->base = pdata->first_gpio; + chip->ngpio = pdata->num_gpio; + chip->label = pdata->name ?: dev_name(&dev->dev); + chip->dev = &dev->dev; + chip->owner = THIS_MODULE; + + clk_enable(nmk_chip->clk); + nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI); + clk_disable(nmk_chip->clk); + + chip->of_node = np; + + ret = gpiochip_add(&nmk_chip->chip); + if (ret) + goto out_free; + + BUG_ON(nmk_chip->bank >= ARRAY_SIZE(nmk_gpio_chips)); + + nmk_gpio_chips[nmk_chip->bank] = nmk_chip; + + platform_set_drvdata(dev, nmk_chip); + + nmk_chip->domain = irq_domain_add_legacy(np, NMK_GPIO_PER_CHIP, + NOMADIK_GPIO_TO_IRQ(pdata->first_gpio), + 0, &nmk_gpio_irq_simple_ops, nmk_chip); + if (!nmk_chip->domain) { + pr_err("%s: Failed to create irqdomain\n", np->full_name); + ret = -ENOSYS; + goto out_free; + } + + nmk_gpio_init_irq(nmk_chip); + + dev_info(&dev->dev, "at address %p\n", nmk_chip->addr); + + return 0; + +out_free: + kfree(nmk_chip); +out_clk: + clk_disable(clk); + clk_put(clk); +out_unmap: + iounmap(base); +out_release: + release_mem_region(res->start, resource_size(res)); +out: + dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret, + pdata->first_gpio, pdata->first_gpio+31); + if (np) + kfree(pdata); + + return ret; +} + +static const struct of_device_id nmk_gpio_match[] = { + { .compatible = "st,nomadik-gpio", }, + {} +}; + +static struct platform_driver nmk_gpio_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "gpio", + .of_match_table = nmk_gpio_match, + }, + .probe = nmk_gpio_probe, +}; + +static int __init nmk_gpio_init(void) +{ + return platform_driver_register(&nmk_gpio_driver); +} + +core_initcall(nmk_gpio_init); + +MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini"); +MODULE_DESCRIPTION("Nomadik GPIO Driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3