diff options
Diffstat (limited to 'arch/arm/plat-nomadik')
| -rw-r--r-- | arch/arm/plat-nomadik/gpio.c | 114 | ||||
| -rw-r--r-- | arch/arm/plat-nomadik/include/plat/gpio.h | 3 |
2 files changed, 100 insertions, 17 deletions
diff --git a/arch/arm/plat-nomadik/gpio.c b/arch/arm/plat-nomadik/gpio.c index 45b1cf95e378..70620426ee55 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 e3a4837e86f4..1b9f6f0843d1 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. */ |