diff options
| author | Rabin Vincent <rabin.vincent@stericsson.com> | 2010-09-02 11:28:05 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-09-02 15:52:19 +0100 |
| commit | 7e3f7e59ccc6ed8b243de9941ffd09d2ad7a5b9c (patch) | |
| tree | 32cfd4d50ae95dcc0fd4b285cb49a403f6bf46a9 /arch/arm/plat-nomadik/gpio.c | |
| parent | e3726fcf263adf764a4f1b9428082837662a41c4 (diff) | |
ARM: 6353/1: nomadik-gpio: add SLPM register handing for DB8500v2
The SLPM register enables/disables wakeup detection on DB8500v2.
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/plat-nomadik/gpio.c')
| -rw-r--r-- | arch/arm/plat-nomadik/gpio.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/arch/arm/plat-nomadik/gpio.c b/arch/arm/plat-nomadik/gpio.c index 977c8f9a07a2..014da39b6a88 100644 --- a/arch/arm/plat-nomadik/gpio.c +++ b/arch/arm/plat-nomadik/gpio.c @@ -118,8 +118,8 @@ static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, [3] /* illegal */ = "??" }; static const char *slpmnames[] = { - [NMK_GPIO_SLPM_INPUT] = "input", - [NMK_GPIO_SLPM_NOCHANGE] = "no-change", + [NMK_GPIO_SLPM_INPUT] = "input/wakeup", + [NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup", }; int pin = PIN_NUM(cfg); @@ -200,6 +200,10 @@ EXPORT_SYMBOL(nmk_config_pins); * changed to an input (with pullup/down enabled) in sleep and deep sleep. If * @mode is NMK_GPIO_SLPM_NOCHANGE, the pin remains in the state it was * configured even when in sleep and deep sleep. + * + * On DB8500v2 onwards, this setting loses the previous meaning and instead + * indicates if wakeup detection is enabled on the pin. Note that + * enable_irq_wake() will automatically enable wakeup detection. */ int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode) { @@ -367,7 +371,27 @@ static void nmk_gpio_irq_unmask(unsigned int irq) static int nmk_gpio_irq_set_wake(unsigned int irq, unsigned int on) { - return nmk_gpio_irq_modify(irq, WAKE, on); + struct nmk_gpio_chip *nmk_chip; + unsigned long flags; + int gpio; + + gpio = NOMADIK_IRQ_TO_GPIO(irq); + nmk_chip = get_irq_chip_data(irq); + if (!nmk_chip) + return -EINVAL; + + spin_lock_irqsave(&nmk_chip->lock, flags); +#ifdef CONFIG_ARCH_U8500 + if (cpu_is_u8500v2()) { + __nmk_gpio_set_slpm(nmk_chip, gpio, + on ? NMK_GPIO_SLPM_WAKEUP_ENABLE + : NMK_GPIO_SLPM_WAKEUP_DISABLE); + } +#endif + __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on); + spin_unlock_irqrestore(&nmk_chip->lock, flags); + + return 0; } static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type) |