diff options
Diffstat (limited to 'drivers/gpio/gpio-pcf857x.c')
| -rw-r--r-- | drivers/gpio/gpio-pcf857x.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c index 945f0cda8529..83db0e19ec7e 100644 --- a/drivers/gpio/gpio-pcf857x.c +++ b/drivers/gpio/gpio-pcf857x.c @@ -91,6 +91,7 @@ struct pcf857x { spinlock_t slock; /* protect irq demux */ unsigned out; /* software latch */ unsigned status; /* current status */ + unsigned int irq_parent; int (*write)(struct i2c_client *client, unsigned data); int (*read)(struct i2c_client *client); @@ -217,9 +218,19 @@ static unsigned int noop_ret(struct irq_data *data) static int pcf857x_irq_set_wake(struct irq_data *data, unsigned int on) { struct pcf857x *gpio = irq_data_get_irq_chip_data(data); + int error = 0; + + if (gpio->irq_parent) { + error = irq_set_irq_wake(gpio->irq_parent, on); + if (error) { + dev_dbg(&gpio->client->dev, + "irq %u doesn't support irq_set_wake\n", + gpio->irq_parent); + gpio->irq_parent = 0; + } + } - irq_set_irq_wake(gpio->client->irq, on); - return 0; + return error; } static struct irq_chip pcf857x_irq_chip = { @@ -364,6 +375,7 @@ static int pcf857x_probe(struct i2c_client *client, gpiochip_set_chained_irqchip(&gpio->chip, &pcf857x_irq_chip, client->irq, NULL); + gpio->irq_parent = client->irq; } /* Let platform code set up the GPIOs and their users. |