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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-05-23 20:03:24 +0300
committerLinus Walleij <linus.walleij@linaro.org>2017-05-29 11:22:48 +0200
commit25e3ef894eef419ee239da42edc6c1f8a4f1cfb5 (patch)
treebe2358271afc2732349ca8a6e40c5eac78b87cba /drivers/gpio
parenta31f5c3a68520ee6a2adee7d5f13f2e6ef209875 (diff)
downloadlinux-25e3ef894eef419ee239da42edc6c1f8a4f1cfb5.tar.bz2
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')
-rw-r--r--drivers/gpio/gpiolib-acpi.c23
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);