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gpio: pca953x: Add wake-up support 

Implement the irq_set_wake() method in the (optional) irq_chip of the
GPIO expander, and propagate wake-up settings to the upstream interrupt
controller.  This allows GPIOs connected to a PCA953X GPIO expander to
serve as wake-up sources.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Geert Uytterhoeven 2019-02-13 14:15:03 +01:00 committed by Linus Walleij
parent 2f7db3c70f
commit 2a9a2f27d3
1 changed files with 9 additions and 0 deletions
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9
drivers/gpio/gpio-pca953x.c
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@ -576,6 +576,14 @@ static void pca953x_irq_unmask(struct irq_data *d)
chip->irq_mask[d->hwirq / BANK_SZ] |= 1 << (d->hwirq % BANK_SZ);
}
static int pca953x_irq_set_wake(struct irq_data *d, unsigned int on)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct pca953x_chip *chip = gpiochip_get_data(gc);
return irq_set_irq_wake(chip->client->irq, on);
}
static void pca953x_irq_bus_lock(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
@ -795,6 +803,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
irq_chip->name = dev_name(&chip->client->dev);
irq_chip->irq_mask = pca953x_irq_mask;
irq_chip->irq_unmask = pca953x_irq_unmask;
irq_chip->irq_set_wake = pca953x_irq_set_wake;
irq_chip->irq_bus_lock = pca953x_irq_bus_lock;
irq_chip->irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock;
irq_chip->irq_set_type = pca953x_irq_set_type;