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@xxxxxxxxx>
---
Tested with a PCA9654 and gpio-keys on an R-Car Ebisu-4D board.
v2:
- Just propagate irq_set_irq_wake(). As pca953x_irq_set_wake()
doesn't need to do anything else, there's no reason for making it
conditional.
---
drivers/gpio/gpio-pca953x.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index de52f63863dbe59b..86c00a3980c47c3b 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -513,6 +513,14 @@ 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);
@@ -732,6 +740,7 @@ 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;
--
2.17.1
