Merge branch 'at91' into devel

2026-05-01 15:00:59 -07:00 · 2012-11-21 16:06:33 +01:00
parent b4d4b1f087 c12a819e3a
commit 5f007db68c
32 changed files with 1908 additions and 142 deletions
@@ -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;