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authorLinus Walleij <linus.walleij@linaro.org>2012-11-21 10:48:33 +0100
committerLinus Walleij <linus.walleij@linaro.org>2012-11-21 10:48:33 +0100
commit17d6b293e72547f75f5d9b680b75459cb8f2c9cf (patch)
tree54e794b046e0c7c1f819d49e9ff4499f9b6f19e5 /drivers/pinctrl
parente59d969f441fb8e25b30125bdf201153adc5a7e3 (diff)
parentad8a15d99cf2c8ab8ac1ab28402c49ec2548358d (diff)
downloadlinux-17d6b293e72547f75f5d9b680b75459cb8f2c9cf.tar.bz2
Merge branch 'delivery/pinctrl-at91-3.8' of http://github.com/at91linux/linux-at91 into at91
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/pinctrl-at91.c126
1 files changed, 125 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index b9e2cbd2ea7b..0d7e6c3c33a7 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -59,6 +59,12 @@ static int gpio_banks;
#define PULL_UP (1 << 0)
#define MULTI_DRIVE (1 << 1)
+#define DEGLITCH (1 << 2)
+#define PULL_DOWN (1 << 3)
+#define DIS_SCHMIT (1 << 4)
+#define DEBOUNCE (1 << 16)
+#define DEBOUNCE_VAL_SHIFT 17
+#define DEBOUNCE_VAL (0x3fff << DEBOUNCE_VAL_SHIFT)
/**
* struct at91_pmx_func - describes AT91 pinmux functions
@@ -122,6 +128,14 @@ struct at91_pin_group {
* @mux_B_periph: mux as periph B
* @mux_C_periph: mux as periph C
* @mux_D_periph: mux as periph D
+ * @get_deglitch: get deglitch status
+ * @set_deglitch: enable/disable deglitch
+ * @get_debounce: get debounce status
+ * @set_debounce: enable/disable debounce
+ * @get_pulldown: get pulldown status
+ * @set_pulldown: enable/disable pulldown
+ * @get_schmitt_trig: get schmitt trigger status
+ * @disable_schmitt_trig: disable schmitt trigger
* @irq_type: return irq type
*/
struct at91_pinctrl_mux_ops {
@@ -130,6 +144,14 @@ struct at91_pinctrl_mux_ops {
void (*mux_B_periph)(void __iomem *pio, unsigned mask);
void (*mux_C_periph)(void __iomem *pio, unsigned mask);
void (*mux_D_periph)(void __iomem *pio, unsigned mask);
+ bool (*get_deglitch)(void __iomem *pio, unsigned pin);
+ void (*set_deglitch)(void __iomem *pio, unsigned mask, bool in_on);
+ bool (*get_debounce)(void __iomem *pio, unsigned pin, u32 *div);
+ void (*set_debounce)(void __iomem *pio, unsigned mask, bool in_on, u32 div);
+ bool (*get_pulldown)(void __iomem *pio, unsigned pin);
+ void (*set_pulldown)(void __iomem *pio, unsigned mask, bool in_on);
+ bool (*get_schmitt_trig)(void __iomem *pio, unsigned pin);
+ void (*disable_schmitt_trig)(void __iomem *pio, unsigned mask);
/* irq */
int (*irq_type)(struct irq_data *d, unsigned type);
};
@@ -386,10 +408,68 @@ static enum at91_mux at91_mux_get_periph(void __iomem *pio, unsigned mask)
return select + 1;
}
+static bool at91_mux_get_deglitch(void __iomem *pio, unsigned pin)
+{
+ return (__raw_readl(pio + PIO_IFSR) >> pin) & 0x1;
+}
+
+static void at91_mux_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
+{
+ __raw_writel(mask, pio + (is_on ? PIO_IFER : PIO_IFDR));
+}
+
+static void at91_mux_pio3_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
+{
+ if (is_on)
+ __raw_writel(mask, pio + PIO_IFSCDR);
+ at91_mux_set_deglitch(pio, mask, is_on);
+}
+
+static bool at91_mux_pio3_get_debounce(void __iomem *pio, unsigned pin, u32 *div)
+{
+ *div = __raw_readl(pio + PIO_SCDR);
+
+ return (__raw_readl(pio + PIO_IFSCSR) >> pin) & 0x1;
+}
+
+static void at91_mux_pio3_set_debounce(void __iomem *pio, unsigned mask,
+ bool is_on, u32 div)
+{
+ if (is_on) {
+ __raw_writel(mask, pio + PIO_IFSCER);
+ __raw_writel(div & PIO_SCDR_DIV, pio + PIO_SCDR);
+ __raw_writel(mask, pio + PIO_IFER);
+ } else {
+ __raw_writel(mask, pio + PIO_IFDR);
+ }
+}
+
+static bool at91_mux_pio3_get_pulldown(void __iomem *pio, unsigned pin)
+{
+ return (__raw_readl(pio + PIO_PPDSR) >> pin) & 0x1;
+}
+
+static void at91_mux_pio3_set_pulldown(void __iomem *pio, unsigned mask, bool is_on)
+{
+ __raw_writel(mask, pio + (is_on ? PIO_PPDER : PIO_PPDDR));
+}
+
+static void at91_mux_pio3_disable_schmitt_trig(void __iomem *pio, unsigned mask)
+{
+ __raw_writel(__raw_readl(pio + PIO_SCHMITT) | mask, pio + PIO_SCHMITT);
+}
+
+static bool at91_mux_pio3_get_schmitt_trig(void __iomem *pio, unsigned pin)
+{
+ return (__raw_readl(pio + PIO_SCHMITT) >> pin) & 0x1;
+}
+
static struct at91_pinctrl_mux_ops at91rm9200_ops = {
.get_periph = at91_mux_get_periph,
.mux_A_periph = at91_mux_set_A_periph,
.mux_B_periph = at91_mux_set_B_periph,
+ .get_deglitch = at91_mux_get_deglitch,
+ .set_deglitch = at91_mux_set_deglitch,
.irq_type = gpio_irq_type,
};
@@ -399,6 +479,14 @@ static struct at91_pinctrl_mux_ops at91sam9x5_ops = {
.mux_B_periph = at91_mux_pio3_set_B_periph,
.mux_C_periph = at91_mux_pio3_set_C_periph,
.mux_D_periph = at91_mux_pio3_set_D_periph,
+ .get_deglitch = at91_mux_get_deglitch,
+ .set_deglitch = at91_mux_pio3_set_deglitch,
+ .get_debounce = at91_mux_pio3_get_debounce,
+ .set_debounce = at91_mux_pio3_set_debounce,
+ .get_pulldown = at91_mux_pio3_get_pulldown,
+ .set_pulldown = at91_mux_pio3_set_pulldown,
+ .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig,
+ .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig,
.irq_type = alt_gpio_irq_type,
};
@@ -624,6 +712,7 @@ static int at91_pinconf_get(struct pinctrl_dev *pctldev,
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
void __iomem *pio;
unsigned pin;
+ int div;
dev_dbg(info->dev, "%s:%d, pin_id=%d, config=0x%lx", __func__, __LINE__, pin_id, *config);
pio = pin_to_controller(info, pin_to_bank(pin_id));
@@ -635,6 +724,15 @@ static int at91_pinconf_get(struct pinctrl_dev *pctldev,
if (at91_mux_get_pullup(pio, pin))
*config |= PULL_UP;
+ if (info->ops->get_deglitch && info->ops->get_deglitch(pio, pin))
+ *config |= DEGLITCH;
+ if (info->ops->get_debounce && info->ops->get_debounce(pio, pin, &div))
+ *config |= DEBOUNCE | (div << DEBOUNCE_VAL_SHIFT);
+ if (info->ops->get_pulldown && info->ops->get_pulldown(pio, pin))
+ *config |= PULL_DOWN;
+ if (info->ops->get_schmitt_trig && info->ops->get_schmitt_trig(pio, pin))
+ *config |= DIS_SCHMIT;
+
return 0;
}
@@ -649,8 +747,21 @@ static int at91_pinconf_set(struct pinctrl_dev *pctldev,
pio = pin_to_controller(info, pin_to_bank(pin_id));
mask = pin_to_mask(pin_id % MAX_NB_GPIO_PER_BANK);
+ if (config & PULL_UP && config & PULL_DOWN)
+ return -EINVAL;
+
at91_mux_set_pullup(pio, mask, config & PULL_UP);
at91_mux_set_multidrive(pio, mask, config & MULTI_DRIVE);
+ if (info->ops->set_deglitch)
+ info->ops->set_deglitch(pio, mask, config & DEGLITCH);
+ if (info->ops->set_debounce)
+ info->ops->set_debounce(pio, mask, config & DEBOUNCE,
+ (config & DEBOUNCE_VAL) >> DEBOUNCE_VAL_SHIFT);
+ if (info->ops->set_pulldown)
+ info->ops->set_pulldown(pio, mask, config & PULL_DOWN);
+ if (info->ops->disable_schmitt_trig && config & DIS_SCHMIT)
+ info->ops->disable_schmitt_trig(pio, mask);
+
return 0;
}
@@ -1364,9 +1475,10 @@ static int __devinit at91_gpio_probe(struct platform_device *pdev)
struct gpio_chip *chip;
struct pinctrl_gpio_range *range;
int ret = 0;
- int irq;
+ int irq, i;
int alias_idx = of_alias_get_id(np, "gpio");
uint32_t ngpio;
+ char **names;
BUG_ON(alias_idx >= ARRAY_SIZE(gpio_chips));
if (gpio_chips[alias_idx]) {
@@ -1436,6 +1548,18 @@ static int __devinit at91_gpio_probe(struct platform_device *pdev)
chip->ngpio = ngpio;
}
+ names = devm_kzalloc(&pdev->dev, sizeof(char*) * chip->ngpio, GFP_KERNEL);
+
+ if (!names) {
+ ret = -ENOMEM;
+ goto clk_err;
+ }
+
+ for (i = 0; i < chip->ngpio; i++)
+ names[i] = kasprintf(GFP_KERNEL, "pio%c%d", alias_idx + 'A', i);
+
+ chip->names = (const char*const*)names;
+
range = &at91_chip->range;
range->name = chip->label;
range->id = alias_idx;