gpio: acpi: Add managed variant of acpi_dev_add_driver_gpios()
Introduce device managed variant of acpi_dev_add_driver_gpios() and its
counterpart acpi_dev_remove_driver_gpios().
The functions in most cases are used in driver's ->probe() and
->remove() callbacks, that's why it's useful to have managed variant of
them.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 9b37a36..108331d 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -362,6 +362,37 @@ int acpi_dev_add_driver_gpios(struct acpi_device *adev,
}
EXPORT_SYMBOL_GPL(acpi_dev_add_driver_gpios);
+static void devm_acpi_dev_release_driver_gpios(struct device *dev, void *res)
+{
+ acpi_dev_remove_driver_gpios(ACPI_COMPANION(dev));
+}
+
+int devm_acpi_dev_add_driver_gpios(struct device *dev,
+ const struct acpi_gpio_mapping *gpios)
+{
+ void *res;
+ int ret;
+
+ res = devres_alloc(devm_acpi_dev_release_driver_gpios, 0, GFP_KERNEL);
+ if (!res)
+ return -ENOMEM;
+
+ ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev), gpios);
+ if (ret) {
+ devres_free(res);
+ return ret;
+ }
+ devres_add(dev, res);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_acpi_dev_add_driver_gpios);
+
+void devm_acpi_dev_remove_driver_gpios(struct device *dev)
+{
+ WARN_ON(devres_release(dev, devm_acpi_dev_release_driver_gpios, NULL, NULL));
+}
+EXPORT_SYMBOL_GPL(devm_acpi_dev_remove_driver_gpios);
+
static bool acpi_get_driver_gpio_data(struct acpi_device *adev,
const char *name, int index,
struct acpi_reference_args *args)
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 673acda..c8eaaad 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -952,6 +952,10 @@ static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev)
adev->driver_gpios = NULL;
}
+int devm_acpi_dev_add_driver_gpios(struct device *dev,
+ const struct acpi_gpio_mapping *gpios);
+void devm_acpi_dev_remove_driver_gpios(struct device *dev);
+
int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index);
#else
static inline int acpi_dev_add_driver_gpios(struct acpi_device *adev,
@@ -961,6 +965,13 @@ static inline int acpi_dev_add_driver_gpios(struct acpi_device *adev,
}
static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev) {}
+static inline int devm_acpi_dev_add_driver_gpios(struct device *dev,
+ const struct acpi_gpio_mapping *gpios)
+{
+ return -ENXIO;
+}
+static inline void devm_acpi_dev_remove_driver_gpios(struct device *dev) {}
+
static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
{
return -ENXIO;