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authorPaul Mundt <lethal@linux-sh.org>2012-07-20 16:42:59 +0900
committerPaul Mundt <lethal@linux-sh.org>2012-07-20 16:42:59 +0900
commit9ff561fdf73493d757bbc74aa58627e1381650fb (patch)
tree4484d230662126b1ac94ea545ca5429c91e0a68b /drivers/sh
parent7b98cf0cf4e8798b9e7435f966ed0d90a2a925de (diff)
parentfdd85ec3eb8cc1b663678a3efa16ee59a32e0277 (diff)
downloadlinux-9ff561fdf73493d757bbc74aa58627e1381650fb.tar.bz2
Merge branch 'common/pinctrl' into sh-latest
Diffstat (limited to 'drivers/sh')
-rw-r--r--drivers/sh/Kconfig16
-rw-r--r--drivers/sh/Makefile4
-rw-r--r--drivers/sh/pfc/Kconfig26
-rw-r--r--drivers/sh/pfc/Makefile3
-rw-r--r--drivers/sh/pfc/core.c (renamed from drivers/sh/pfc.c)86
-rw-r--r--drivers/sh/pfc/gpio.c (renamed from drivers/sh/pfc-gpio.c)104
-rw-r--r--drivers/sh/pfc/pinctrl.c530
7 files changed, 619 insertions, 150 deletions
diff --git a/drivers/sh/Kconfig b/drivers/sh/Kconfig
index d7dbfee1bc70..d860ef743568 100644
--- a/drivers/sh/Kconfig
+++ b/drivers/sh/Kconfig
@@ -1,20 +1,6 @@
menu "SuperH / SH-Mobile Driver Options"
source "drivers/sh/intc/Kconfig"
-
-comment "Pin function controller options"
-
-config SH_PFC
- # XXX move off the gpio dependency
- depends on GENERIC_GPIO
- select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB
- def_bool y
-
-config GPIO_SH_PFC
- tristate "SuperH PFC GPIO support"
- depends on SH_PFC && GPIOLIB
- help
- This enables support for GPIOs within the SoC's pin function
- controller.
+source "drivers/sh/pfc/Kconfig"
endmenu
diff --git a/drivers/sh/Makefile b/drivers/sh/Makefile
index f5d93e8de090..e57895b1a425 100644
--- a/drivers/sh/Makefile
+++ b/drivers/sh/Makefile
@@ -5,7 +5,7 @@ obj-y := intc/
obj-$(CONFIG_HAVE_CLK) += clk/
obj-$(CONFIG_MAPLE) += maple/
+obj-$(CONFIG_SH_PFC) += pfc/
obj-$(CONFIG_SUPERHYWAY) += superhyway/
-obj-$(CONFIG_SH_PFC) += pfc.o
-obj-$(CONFIG_GPIO_SH_PFC) += pfc-gpio.o
+
obj-y += pm_runtime.o
diff --git a/drivers/sh/pfc/Kconfig b/drivers/sh/pfc/Kconfig
new file mode 100644
index 000000000000..804f9ad1bf4a
--- /dev/null
+++ b/drivers/sh/pfc/Kconfig
@@ -0,0 +1,26 @@
+comment "Pin function controller options"
+
+config SH_PFC
+ # XXX move off the gpio dependency
+ depends on GENERIC_GPIO
+ select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB
+ select PINCTRL_SH_PFC
+ def_bool y
+
+#
+# Placeholder for now, rehome to drivers/pinctrl once the PFC APIs
+# have settled.
+#
+config PINCTRL_SH_PFC
+ tristate "SuperH PFC pin controller driver"
+ depends on SH_PFC
+ select PINCTRL
+ select PINMUX
+ select PINCONF
+
+config GPIO_SH_PFC
+ tristate "SuperH PFC GPIO support"
+ depends on SH_PFC && GPIOLIB
+ help
+ This enables support for GPIOs within the SoC's pin function
+ controller.
diff --git a/drivers/sh/pfc/Makefile b/drivers/sh/pfc/Makefile
new file mode 100644
index 000000000000..7916027cce37
--- /dev/null
+++ b/drivers/sh/pfc/Makefile
@@ -0,0 +1,3 @@
+obj-y += core.o
+obj-$(CONFIG_PINCTRL_SH_PFC) += pinctrl.o
+obj-$(CONFIG_GPIO_SH_PFC) += gpio.o
diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc/core.c
index ce4579ebd602..68169373c98b 100644
--- a/drivers/sh/pfc.c
+++ b/drivers/sh/pfc/core.c
@@ -8,7 +8,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define pr_fmt(fmt) "sh_pfc " KBUILD_MODNAME ": " fmt
#include <linux/errno.h>
#include <linux/kernel.h>
@@ -19,6 +19,7 @@
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/ioport.h>
+#include <linux/pinctrl/machine.h>
static struct sh_pfc *sh_pfc __read_mostly;
@@ -501,49 +502,6 @@ int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
}
EXPORT_SYMBOL_GPL(sh_pfc_config_gpio);
-int sh_pfc_set_direction(struct sh_pfc *pfc, unsigned gpio,
- int new_pinmux_type)
-{
- int pinmux_type;
- int ret = -EINVAL;
-
- if (!pfc)
- goto err_out;
-
- pinmux_type = pfc->gpios[gpio].flags & PINMUX_FLAG_TYPE;
-
- switch (pinmux_type) {
- case PINMUX_TYPE_GPIO:
- break;
- case PINMUX_TYPE_OUTPUT:
- case PINMUX_TYPE_INPUT:
- case PINMUX_TYPE_INPUT_PULLUP:
- case PINMUX_TYPE_INPUT_PULLDOWN:
- sh_pfc_config_gpio(pfc, gpio, pinmux_type, GPIO_CFG_FREE);
- break;
- default:
- goto err_out;
- }
-
- if (sh_pfc_config_gpio(pfc, gpio,
- new_pinmux_type,
- GPIO_CFG_DRYRUN) != 0)
- goto err_out;
-
- if (sh_pfc_config_gpio(pfc, gpio,
- new_pinmux_type,
- GPIO_CFG_REQ) != 0)
- BUG();
-
- pfc->gpios[gpio].flags &= ~PINMUX_FLAG_TYPE;
- pfc->gpios[gpio].flags |= new_pinmux_type;
-
- ret = 0;
- err_out:
- return ret;
-}
-EXPORT_SYMBOL_GPL(sh_pfc_set_direction);
-
int register_sh_pfc(struct sh_pfc *pfc)
{
int (*initroutine)(struct sh_pfc *) = NULL;
@@ -563,16 +521,52 @@ int register_sh_pfc(struct sh_pfc *pfc)
spin_lock_init(&pfc->lock);
+ pinctrl_provide_dummies();
setup_data_regs(pfc);
sh_pfc = pfc;
- pr_info("%s support registered\n", pfc->name);
+ /*
+ * Initialize pinctrl bindings first
+ */
+ initroutine = symbol_request(sh_pfc_register_pinctrl);
+ if (initroutine) {
+ ret = (*initroutine)(pfc);
+ symbol_put_addr(initroutine);
+
+ if (unlikely(ret != 0))
+ goto err;
+ } else {
+ pr_err("failed to initialize pinctrl bindings\n");
+ goto err;
+ }
+
+ /*
+ * Then the GPIO chip
+ */
initroutine = symbol_request(sh_pfc_register_gpiochip);
if (initroutine) {
- (*initroutine)(pfc);
+ ret = (*initroutine)(pfc);
symbol_put_addr(initroutine);
+
+ /*
+ * If the GPIO chip fails to come up we still leave the
+ * PFC state as it is, given that there are already
+ * extant users of it that have succeeded by this point.
+ */
+ if (unlikely(ret != 0)) {
+ pr_notice("failed to init GPIO chip, ignoring...\n");
+ ret = 0;
+ }
}
+ pr_info("%s support registered\n", pfc->name);
+
return 0;
+
+err:
+ pfc_iounmap(pfc);
+ sh_pfc = NULL;
+
+ return ret;
}
diff --git a/drivers/sh/pfc-gpio.c b/drivers/sh/pfc/gpio.c
index d74e5a96024b..62bca98474a9 100644
--- a/drivers/sh/pfc-gpio.c
+++ b/drivers/sh/pfc/gpio.c
@@ -8,7 +8,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define pr_fmt(fmt) "sh_pfc " KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/gpio.h>
@@ -16,6 +16,7 @@
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
struct sh_pfc_chip {
struct sh_pfc *pfc;
@@ -34,80 +35,12 @@ static struct sh_pfc *gpio_to_pfc(struct gpio_chip *gc)
static int sh_gpio_request(struct gpio_chip *gc, unsigned offset)
{
- struct sh_pfc *pfc = gpio_to_pfc(gc);
- struct pinmux_data_reg *dummy;
- unsigned long flags;
- int i, ret, pinmux_type;
-
- ret = -EINVAL;
-
- if (!pfc)
- goto err_out;
-
- spin_lock_irqsave(&pfc->lock, flags);
-
- if ((pfc->gpios[offset].flags & PINMUX_FLAG_TYPE) != PINMUX_TYPE_NONE)
- goto err_unlock;
-
- /* setup pin function here if no data is associated with pin */
-
- if (sh_pfc_get_data_reg(pfc, offset, &dummy, &i) != 0)
- pinmux_type = PINMUX_TYPE_FUNCTION;
- else
- pinmux_type = PINMUX_TYPE_GPIO;
-
- if (pinmux_type == PINMUX_TYPE_FUNCTION) {
- if (sh_pfc_config_gpio(pfc, offset,
- pinmux_type,
- GPIO_CFG_DRYRUN) != 0)
- goto err_unlock;
-
- if (sh_pfc_config_gpio(pfc, offset,
- pinmux_type,
- GPIO_CFG_REQ) != 0)
- BUG();
- }
-
- pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
- pfc->gpios[offset].flags |= pinmux_type;
-
- ret = 0;
- err_unlock:
- spin_unlock_irqrestore(&pfc->lock, flags);
- err_out:
- return ret;
+ return pinctrl_request_gpio(offset);
}
static void sh_gpio_free(struct gpio_chip *gc, unsigned offset)
{
- struct sh_pfc *pfc = gpio_to_pfc(gc);
- unsigned long flags;
- int pinmux_type;
-
- if (!pfc)
- return;
-
- spin_lock_irqsave(&pfc->lock, flags);
-
- pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
- sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
- pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
- pfc->gpios[offset].flags |= PINMUX_TYPE_NONE;
-
- spin_unlock_irqrestore(&pfc->lock, flags);
-}
-
-static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
-{
- struct sh_pfc *pfc = gpio_to_pfc(gc);
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&pfc->lock, flags);
- ret = sh_pfc_set_direction(pfc, offset, PINMUX_TYPE_INPUT);
- spin_unlock_irqrestore(&pfc->lock, flags);
-
- return ret;
+ pinctrl_free_gpio(offset);
}
static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value)
@@ -121,22 +54,6 @@ static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value)
sh_pfc_write_bit(dr, bit, value);
}
-static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
- int value)
-{
- struct sh_pfc *pfc = gpio_to_pfc(gc);
- unsigned long flags;
- int ret;
-
- sh_gpio_set_value(pfc, offset, value);
-
- spin_lock_irqsave(&pfc->lock, flags);
- ret = sh_pfc_set_direction(pfc, offset, PINMUX_TYPE_OUTPUT);
- spin_unlock_irqrestore(&pfc->lock, flags);
-
- return ret;
-}
-
static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio)
{
struct pinmux_data_reg *dr = NULL;
@@ -148,6 +65,19 @@ static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio)
return sh_pfc_read_bit(dr, bit);
}
+static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+ return pinctrl_gpio_direction_input(offset);
+}
+
+static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ sh_gpio_set_value(gpio_to_pfc(gc), offset, value);
+
+ return pinctrl_gpio_direction_output(offset);
+}
+
static int sh_gpio_get(struct gpio_chip *gc, unsigned offset)
{
return sh_gpio_get_value(gpio_to_pfc(gc), offset);
diff --git a/drivers/sh/pfc/pinctrl.c b/drivers/sh/pfc/pinctrl.c
new file mode 100644
index 000000000000..0802b6c0d653
--- /dev/null
+++ b/drivers/sh/pfc/pinctrl.c
@@ -0,0 +1,530 @@
+/*
+ * SuperH Pin Function Controller pinmux support.
+ *
+ * Copyright (C) 2012 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define DRV_NAME "pinctrl-sh_pfc"
+
+#define pr_fmt(fmt) DRV_NAME " " KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sh_pfc.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+struct sh_pfc_pinctrl {
+ struct pinctrl_dev *pctl;
+ struct sh_pfc *pfc;
+
+ struct pinmux_gpio **functions;
+ unsigned int nr_functions;
+
+ struct pinctrl_pin_desc *pads;
+ unsigned int nr_pads;
+
+ spinlock_t lock;
+};
+
+static struct sh_pfc_pinctrl *sh_pfc_pmx;
+
+static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+ return pmx->nr_pads;
+}
+
+static const char *sh_pfc_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+ return pmx->pads[selector].name;
+}
+
+static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned group,
+ const unsigned **pins, unsigned *num_pins)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = &pmx->pads[group].number;
+ *num_pins = 1;
+
+ return 0;
+}
+
+static void sh_pfc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+ unsigned offset)
+{
+ seq_printf(s, "%s", DRV_NAME);
+}
+
+static struct pinctrl_ops sh_pfc_pinctrl_ops = {
+ .get_groups_count = sh_pfc_get_groups_count,
+ .get_group_name = sh_pfc_get_group_name,
+ .get_group_pins = sh_pfc_get_group_pins,
+ .pin_dbg_show = sh_pfc_pin_dbg_show,
+};
+
+static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+ return pmx->nr_functions;
+}
+
+static const char *sh_pfc_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+ return pmx->functions[selector]->name;
+}
+
+static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = &pmx->functions[func]->name;
+ *num_groups = 1;
+
+ return 0;
+}
+
+static int sh_pfc_noop_enable(struct pinctrl_dev *pctldev, unsigned func,
+ unsigned group)
+{
+ return 0;
+}
+
+static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func,
+ unsigned group)
+{
+}
+
+static inline int sh_pfc_config_function(struct sh_pfc *pfc, unsigned offset)
+{
+ if (sh_pfc_config_gpio(pfc, offset,
+ PINMUX_TYPE_FUNCTION,
+ GPIO_CFG_DRYRUN) != 0)
+ return -EINVAL;
+
+ if (sh_pfc_config_gpio(pfc, offset,
+ PINMUX_TYPE_FUNCTION,
+ GPIO_CFG_REQ) != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int sh_pfc_reconfig_pin(struct sh_pfc *pfc, unsigned offset,
+ int new_type)
+{
+ unsigned long flags;
+ int pinmux_type;
+ int ret = -EINVAL;
+
+ spin_lock_irqsave(&pfc->lock, flags);
+
+ pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
+
+ /*
+ * See if the present config needs to first be de-configured.
+ */
+ switch (pinmux_type) {
+ case PINMUX_TYPE_GPIO:
+ break;
+ case PINMUX_TYPE_OUTPUT:
+ case PINMUX_TYPE_INPUT:
+ case PINMUX_TYPE_INPUT_PULLUP:
+ case PINMUX_TYPE_INPUT_PULLDOWN:
+ sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
+ break;
+ default:
+ goto err;
+ }
+
+ /*
+ * Dry run
+ */
+ if (sh_pfc_config_gpio(pfc, offset, new_type,
+ GPIO_CFG_DRYRUN) != 0)
+ goto err;
+
+ /*
+ * Request
+ */
+ if (sh_pfc_config_gpio(pfc, offset, new_type,
+ GPIO_CFG_REQ) != 0)
+ goto err;
+
+ pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
+ pfc->gpios[offset].flags |= new_type;
+
+ ret = 0;
+
+err:
+ spin_unlock_irqrestore(&pfc->lock, flags);
+
+ return ret;
+}
+
+
+static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+ struct sh_pfc *pfc = pmx->pfc;
+ unsigned long flags;
+ int ret, pinmux_type;
+
+ spin_lock_irqsave(&pfc->lock, flags);
+
+ pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
+
+ switch (pinmux_type) {
+ case PINMUX_TYPE_FUNCTION:
+ pr_notice_once("Use of GPIO API for function requests is "
+ "deprecated, convert to pinctrl\n");
+ /* handle for now */
+ ret = sh_pfc_config_function(pfc, offset);
+ if (unlikely(ret < 0))
+ goto err;
+
+ break;
+ case PINMUX_TYPE_GPIO:
+ break;
+ default:
+ pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type);
+ return -ENOTSUPP;
+ }
+
+ ret = 0;
+
+err:
+ spin_unlock_irqrestore(&pfc->lock, flags);
+
+ return ret;
+}
+
+static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+ struct sh_pfc *pfc = pmx->pfc;
+ unsigned long flags;
+ int pinmux_type;
+
+ spin_lock_irqsave(&pfc->lock, flags);
+
+ pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
+
+ sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
+
+ spin_unlock_irqrestore(&pfc->lock, flags);
+}
+
+static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset, bool input)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+ int type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT;
+
+ return sh_pfc_reconfig_pin(pmx->pfc, offset, type);
+}
+
+static struct pinmux_ops sh_pfc_pinmux_ops = {
+ .get_functions_count = sh_pfc_get_functions_count,
+ .get_function_name = sh_pfc_get_function_name,
+ .get_function_groups = sh_pfc_get_function_groups,
+ .enable = sh_pfc_noop_enable,
+ .disable = sh_pfc_noop_disable,
+ .gpio_request_enable = sh_pfc_gpio_request_enable,
+ .gpio_disable_free = sh_pfc_gpio_disable_free,
+ .gpio_set_direction = sh_pfc_gpio_set_direction,
+};
+
+static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long *config)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+ struct sh_pfc *pfc = pmx->pfc;
+
+ *config = pfc->gpios[pin].flags & PINMUX_FLAG_TYPE;
+
+ return 0;
+}
+
+static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long config)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+ struct sh_pfc *pfc = pmx->pfc;
+
+ /* Validate the new type */
+ if (config >= PINMUX_FLAG_TYPE)
+ return -EINVAL;
+
+ return sh_pfc_reconfig_pin(pmx->pfc, pin, config);
+}
+
+static void sh_pfc_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned pin)
+{
+ const char *pinmux_type_str[] = {
+ [PINMUX_TYPE_NONE] = "none",
+ [PINMUX_TYPE_FUNCTION] = "function",
+ [PINMUX_TYPE_GPIO] = "gpio",
+ [PINMUX_TYPE_OUTPUT] = "output",
+ [PINMUX_TYPE_INPUT] = "input",
+ [PINMUX_TYPE_INPUT_PULLUP] = "input bias pull up",
+ [PINMUX_TYPE_INPUT_PULLDOWN] = "input bias pull down",
+ };
+ unsigned long config;
+ int rc;
+
+ rc = sh_pfc_pinconf_get(pctldev, pin, &config);
+ if (unlikely(rc != 0))
+ return;
+
+ seq_printf(s, " %s", pinmux_type_str[config]);
+}
+
+static struct pinconf_ops sh_pfc_pinconf_ops = {
+ .pin_config_get = sh_pfc_pinconf_get,
+ .pin_config_set = sh_pfc_pinconf_set,
+ .pin_config_dbg_show = sh_pfc_pinconf_dbg_show,
+};
+
+static struct pinctrl_gpio_range sh_pfc_gpio_range = {
+ .name = DRV_NAME,
+ .id = 0,
+};
+
+static struct pinctrl_desc sh_pfc_pinctrl_desc = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .pctlops = &sh_pfc_pinctrl_ops,
+ .pmxops = &sh_pfc_pinmux_ops,
+ .confops = &sh_pfc_pinconf_ops,
+};
+
+int sh_pfc_register_pinctrl(struct sh_pfc *pfc)
+{
+ sh_pfc_pmx = kzalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL);
+ if (unlikely(!sh_pfc_pmx))
+ return -ENOMEM;
+
+ spin_lock_init(&sh_pfc_pmx->lock);
+
+ sh_pfc_pmx->pfc = pfc;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(sh_pfc_register_pinctrl);
+
+static inline void __devinit sh_pfc_map_one_gpio(struct sh_pfc *pfc,
+ struct sh_pfc_pinctrl *pmx,
+ struct pinmux_gpio *gpio,
+ unsigned offset)
+{
+ struct pinmux_data_reg *dummy;
+ unsigned long flags;
+ int bit;
+
+ gpio->flags &= ~PINMUX_FLAG_TYPE;
+
+ if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0)
+ gpio->flags |= PINMUX_TYPE_GPIO;
+ else {
+ gpio->flags |= PINMUX_TYPE_FUNCTION;
+
+ spin_lock_irqsave(&pmx->lock, flags);
+ pmx->nr_functions++;
+ spin_unlock_irqrestore(&pmx->lock, flags);
+ }
+}
+
+/* pinmux ranges -> pinctrl pin descs */
+static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc,
+ struct sh_pfc_pinctrl *pmx)
+{
+ unsigned long flags;
+ int i;
+
+ pmx->nr_pads = pfc->last_gpio - pfc->first_gpio + 1;
+
+ pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads,
+ GFP_KERNEL);
+ if (unlikely(!pmx->pads)) {
+ pmx->nr_pads = 0;
+ return -ENOMEM;
+ }
+
+ spin_lock_irqsave(&pfc->lock, flags);
+
+ /*
+ * We don't necessarily have a 1:1 mapping between pin and linux
+ * GPIO number, as the latter maps to the associated enum_id.
+ * Care needs to be taken to translate back to pin space when
+ * dealing with any pin configurations.
+ */
+ for (i = 0; i < pmx->nr_pads; i++) {
+ struct pinctrl_pin_desc *pin = pmx->pads + i;
+ struct pinmux_gpio *gpio = pfc->gpios + i;
+
+ pin->number = pfc->first_gpio + i;
+ pin->name = gpio->name;
+
+ /* XXX */
+ if (unlikely(!gpio->enum_id))
+ continue;
+
+ sh_pfc_map_one_gpio(pfc, pmx, gpio, i);
+ }
+
+ spin_unlock_irqrestore(&pfc->lock, flags);
+
+ sh_pfc_pinctrl_desc.pins = pmx->pads;
+ sh_pfc_pinctrl_desc.npins = pmx->nr_pads;
+
+ return 0;
+}
+
+static int __devinit sh_pfc_map_functions(struct sh_pfc *pfc,
+ struct sh_pfc_pinctrl *pmx)
+{
+ unsigned long flags;
+ int i, fn;
+
+ pmx->functions = kzalloc(pmx->nr_functions * sizeof(void *),
+ GFP_KERNEL);
+ if (unlikely(!pmx->functions))
+ return -ENOMEM;
+
+ spin_lock_irqsave(&pmx->lock, flags);
+
+ for (i = fn = 0; i < pmx->nr_pads; i++) {
+ struct pinmux_gpio *gpio = pfc->gpios + i;
+
+ if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION)
+ pmx->functions[fn++] = gpio;
+ }
+
+ spin_unlock_irqrestore(&pmx->lock, flags);
+
+ return 0;
+}
+
+static int __devinit sh_pfc_pinctrl_probe(struct platform_device *pdev)
+{
+ struct sh_pfc *pfc;
+ int ret;
+
+ if (unlikely(!sh_pfc_pmx))
+ return -ENODEV;
+
+ pfc = sh_pfc_pmx->pfc;
+
+ ret = sh_pfc_map_gpios(pfc, sh_pfc_pmx);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ret = sh_pfc_map_functions(pfc, sh_pfc_pmx);
+ if (unlikely(ret != 0))
+ goto free_pads;
+
+ sh_pfc_pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, &pdev->dev,
+ sh_pfc_pmx);
+ if (IS_ERR(sh_pfc_pmx->pctl)) {
+ ret = PTR_ERR(sh_pfc_pmx->pctl);
+ goto free_functions;
+ }
+
+ sh_pfc_gpio_range.npins = pfc->last_gpio - pfc->first_gpio + 1;
+ sh_pfc_gpio_range.base = pfc->first_gpio;
+ sh_pfc_gpio_range.pin_base = pfc->first_gpio;
+
+ pinctrl_add_gpio_range(sh_pfc_pmx->pctl, &sh_pfc_gpio_range);
+
+ platform_set_drvdata(pdev, sh_pfc_pmx);
+
+ return 0;
+
+free_functions:
+ kfree(sh_pfc_pmx->functions);
+free_pads:
+ kfree(sh_pfc_pmx->pads);
+ kfree(sh_pfc_pmx);
+
+ return ret;
+}
+
+static int __devexit sh_pfc_pinctrl_remove(struct platform_device *pdev)
+{
+ struct sh_pfc_pinctrl *pmx = platform_get_drvdata(pdev);
+
+ pinctrl_remove_gpio_range(pmx->pctl, &sh_pfc_gpio_range);
+ pinctrl_unregister(pmx->pctl);
+
+ platform_set_drvdata(pdev, NULL);
+
+ kfree(sh_pfc_pmx->functions);
+ kfree(sh_pfc_pmx->pads);
+ kfree(sh_pfc_pmx);
+
+ return 0;
+}
+
+static struct platform_driver sh_pfc_pinctrl_driver = {
+ .probe = sh_pfc_pinctrl_probe,
+ .remove = __devexit_p(sh_pfc_pinctrl_remove),
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static struct platform_device sh_pfc_pinctrl_device = {
+ .name = DRV_NAME,
+ .id = -1,
+};
+
+static int __init sh_pfc_pinctrl_init(void)
+{
+ int rc;
+
+ rc = platform_driver_register(&sh_pfc_pinctrl_driver);
+ if (likely(!rc)) {
+ rc = platform_device_register(&sh_pfc_pinctrl_device);
+ if (unlikely(rc))
+ platform_driver_unregister(&sh_pfc_pinctrl_driver);
+ }
+
+ return rc;
+}
+
+static void __exit sh_pfc_pinctrl_exit(void)
+{
+ platform_driver_unregister(&sh_pfc_pinctrl_driver);
+}
+
+subsys_initcall(sh_pfc_pinctrl_init);
+module_exit(sh_pfc_pinctrl_exit);