1 files changed, 97 insertions, 17 deletions

diff --git a/arch/arm/plat-nomadik/gpio.c b/arch/arm/plat-nomadik/gpio.c
index 45b1cf95e37..70620426ee5 100644
--- a/arch/arm/plat-nomadik/gpio.c
+++ b/arch/arm/plat-nomadik/gpio.c
@@ -50,6 +50,10 @@ struct nmk_gpio_chip {
 	/* Keep track of configured edges */
 	u32 edge_rising;
 	u32 edge_falling;
+	u32 real_wake;
+	u32 rwimsc;
+	u32 fwimsc;
+	u32 slpm;
 };
 
 static struct nmk_gpio_chip *
@@ -534,8 +538,20 @@ static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
 	}
 }
 
-static int nmk_gpio_irq_modify(struct irq_data *d, enum nmk_gpio_irq_type which,
-			       bool enable)
+static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip,
+				int gpio, bool on)
+{
+#ifdef CONFIG_ARCH_U8500
+	if (cpu_is_u8500v2()) {
+		__nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base,
+				    on ? NMK_GPIO_SLPM_WAKEUP_ENABLE
+				       : NMK_GPIO_SLPM_WAKEUP_DISABLE);
+	}
+#endif
+	__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on);
+}
+
+static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable)
 {
 	int gpio;
 	struct nmk_gpio_chip *nmk_chip;
@@ -548,45 +564,55 @@ static int nmk_gpio_irq_modify(struct irq_data *d, enum nmk_gpio_irq_type which,
 	if (!nmk_chip)
 		return -EINVAL;
 
-	spin_lock_irqsave(&nmk_chip->lock, flags);
-	__nmk_gpio_irq_modify(nmk_chip, gpio, which, enable);
-	spin_unlock_irqrestore(&nmk_chip->lock, flags);
+	spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
+	spin_lock(&nmk_chip->lock);
+
+	__nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, enable);
+
+	if (!(nmk_chip->real_wake & bitmask))
+		__nmk_gpio_set_wake(nmk_chip, gpio, enable);
+
+	spin_unlock(&nmk_chip->lock);
+	spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
 
 	return 0;
 }
 
 static void nmk_gpio_irq_mask(struct irq_data *d)
 {
-	nmk_gpio_irq_modify(d, NORMAL, false);
+	nmk_gpio_irq_maskunmask(d, false);
 }
 
 static void nmk_gpio_irq_unmask(struct irq_data *d)
 {
-	nmk_gpio_irq_modify(d, NORMAL, true);
+	nmk_gpio_irq_maskunmask(d, true);
 }
 
 static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
 {
+	struct irq_desc *desc = irq_to_desc(d->irq);
+	bool enabled = !(desc->status & IRQ_DISABLED);
 	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);
 
 	spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
 	spin_lock(&nmk_chip->lock);
 
-#ifdef CONFIG_ARCH_U8500
-	if (cpu_is_u8500v2()) {
-		__nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base,
-				    on ? NMK_GPIO_SLPM_WAKEUP_ENABLE
-				       : NMK_GPIO_SLPM_WAKEUP_DISABLE);
-	}
-#endif
-	__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on);
+	if (!enabled)
+		__nmk_gpio_set_wake(nmk_chip, gpio, 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);
@@ -620,7 +646,7 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 	if (enabled)
 		__nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, false);
 
-	if (wake)
+	if (enabled || wake)
 		__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, false);
 
 	nmk_chip->edge_rising &= ~bitmask;
@@ -634,7 +660,7 @@ static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 	if (enabled)
 		__nmk_gpio_irq_modify(nmk_chip, gpio, NORMAL, true);
 
-	if (wake)
+	if (enabled || wake)
 		__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, true);
 
 	spin_unlock_irqrestore(&nmk_chip->lock, flags);
@@ -870,6 +896,60 @@ static struct gpio_chip nmk_gpio_template = {
 	.can_sleep		= 0,
 };
 
+/*
+ * 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;
+
+		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,
+		       chip->addr + NMK_GPIO_FWIMSC);
+
+		if (cpu_is_u8500v2()) {
+			chip->slpm = readl(chip->addr + NMK_GPIO_SLPC);
+
+			/* 0 -> wakeup enable */
+			writel(~chip->real_wake, chip->addr + NMK_GPIO_SLPC);
+		}
+	}
+}
+
+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;
+
+		writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC);
+		writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC);
+
+		if (cpu_is_u8500v2())
+			writel(chip->slpm, chip->addr + NMK_GPIO_SLPC);
+	}
+}
+
 static int __devinit nmk_gpio_probe(struct platform_device *dev)
 {
 	struct nmk_gpio_platform_data *pdata = dev->dev.platform_data;