diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2017-05-23 20:03:24 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-05-29 11:22:48 +0200 |
| commit | 25e3ef894eef419ee239da42edc6c1f8a4f1cfb5 (patch) | |
| tree | be2358271afc2732349ca8a6e40c5eac78b87cba /drivers/gpio/gpiolib-acpi.c | |
| parent | a31f5c3a68520ee6a2adee7d5f13f2e6ef209875 (diff) | |
| download | lwn-25e3ef894eef419ee239da42edc6c1f8a4f1cfb5.tar.gz lwn-25e3ef894eef419ee239da42edc6c1f8a4f1cfb5.zip | |
gpio: acpi: Split out acpi_gpio_get_irq_resource() helper
The helper does retrieve pointer to struct acpi_resource_gpio from
struct acpi_resource if it represents GpioInt() resource.
It will be used by PNP code later on.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpiolib-acpi.c')
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index e431222edc2b..6bea176b066c 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -165,6 +165,23 @@ static void acpi_gpio_chip_dh(acpi_handle handle, void *data) /* The address of this function is used as a key. */ } +bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, + struct acpi_resource_gpio **agpio) +{ + struct acpi_resource_gpio *gpio; + + if (ares->type != ACPI_RESOURCE_TYPE_GPIO) + return false; + + gpio = &ares->data.gpio; + if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT) + return false; + + *agpio = gpio; + return true; +} +EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource); + static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, void *context) { @@ -178,11 +195,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, unsigned long irqflags; int ret, pin, irq; - if (ares->type != ACPI_RESOURCE_TYPE_GPIO) - return AE_OK; - - agpio = &ares->data.gpio; - if (agpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT) + if (!acpi_gpio_get_irq_resource(ares, &agpio)) return AE_OK; handle = ACPI_HANDLE(chip->parent); |