diff options
| author | Hoan Tran <hotran@apm.com> | 2017-09-08 15:41:15 -0700 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-09-19 09:39:24 +0200 |
| commit | 6437c7ba69c30a2d3dfd6aa9e8b464c3c4a8cd43 (patch) | |
| tree | af3d0a473acc0d2f4ac4eda31a9ea0b6e23c0736 /drivers | |
| parent | a621c99a96e64e3d6d5d47745a5e832262ac8f7c (diff) | |
| download | linux-6437c7ba69c30a2d3dfd6aa9e8b464c3c4a8cd43.tar.bz2 | |
gpio: dwapb: Add wakeup source support
This patch supports irq_set_wake for dwapb gpio. It allows GPIOs
to be configured as wakeup sources and wake the system from suspend.
Signed-off-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-dwapb.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index c07ada9c7af6..5cdb7bc3ad99 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -77,6 +77,7 @@ struct dwapb_context { u32 int_type; u32 int_pol; u32 int_deb; + u32 wake_en; }; #endif @@ -295,6 +296,22 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type) return 0; } +#ifdef CONFIG_PM_SLEEP +static int dwapb_irq_set_wake(struct irq_data *d, unsigned int enable) +{ + struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d); + struct dwapb_gpio *gpio = igc->private; + struct dwapb_context *ctx = gpio->ports[0].ctx; + + if (enable) + ctx->wake_en |= BIT(d->hwirq); + else + ctx->wake_en &= ~BIT(d->hwirq); + + return 0; +} +#endif + static int dwapb_gpio_set_debounce(struct gpio_chip *gc, unsigned offset, unsigned debounce) { @@ -385,6 +402,9 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, ct->chip.irq_disable = dwapb_irq_disable; ct->chip.irq_request_resources = dwapb_irq_reqres; ct->chip.irq_release_resources = dwapb_irq_relres; +#ifdef CONFIG_PM_SLEEP + ct->chip.irq_set_wake = dwapb_irq_set_wake; +#endif ct->regs.ack = gpio_reg_convert(gpio, GPIO_PORTA_EOI); ct->regs.mask = gpio_reg_convert(gpio, GPIO_INTMASK); ct->type = IRQ_TYPE_LEVEL_MASK; @@ -699,7 +719,8 @@ static int dwapb_gpio_suspend(struct device *dev) ctx->int_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE); /* Mask out interrupts */ - dwapb_write(gpio, GPIO_INTMASK, 0xffffffff); + dwapb_write(gpio, GPIO_INTMASK, + 0xffffffff & ~ctx->wake_en); } } spin_unlock_irqrestore(&gc->bgpio_lock, flags); |