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-rw-r--r--arch/arm/plat-nomadik/gpio.c114
-rw-r--r--arch/arm/plat-nomadik/include/plat/gpio.h3
2 files changed, 100 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;
diff --git a/arch/arm/plat-nomadik/include/plat/gpio.h b/arch/arm/plat-nomadik/include/plat/gpio.h
index e3a4837e86f..1b9f6f0843d 100644
--- a/arch/arm/plat-nomadik/include/plat/gpio.h
+++ b/arch/arm/plat-nomadik/include/plat/gpio.h
@@ -75,6 +75,9 @@ extern int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull);
extern int nmk_gpio_set_mode(int gpio, int gpio_mode);
extern int nmk_gpio_get_mode(int gpio);
+extern void nmk_gpio_wakeups_suspend(void);
+extern void nmk_gpio_wakeups_resume(void);
+
/*
* Platform data to register a block: only the initial gpio/irq number.
*/
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 11:01:10 +0000