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Subject[PATCH v2 1/2] gpiolib: Provide to_gpio_device() helper
Date
Provide to_gpio_device() helper which can be utilized in the existing
and future code.

While at it, make sure it becomes no-op at compilation time.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: made helper static inline (Bart)
drivers/gpio/gpiolib.c | 2 +-
drivers/gpio/gpiolib.h | 9 +++++++--
2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index a11480634213..ccd47da4ec66 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -548,7 +548,7 @@ EXPORT_SYMBOL_GPL(gpiochip_line_is_valid);

static void gpiodevice_release(struct device *dev)
{
- struct gpio_device *gdev = container_of(dev, struct gpio_device, dev);
+ struct gpio_device *gdev = to_gpio_device(dev);
unsigned long flags;

spin_lock_irqsave(&gpio_lock, flags);
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index d900ecdbac46..e443c1023a37 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -20,9 +20,9 @@

/**
* struct gpio_device - internal state container for GPIO devices
- * @id: numerical ID number for the GPIO chip
* @dev: the GPIO device struct
* @chrdev: character device for the GPIO device
+ * @id: numerical ID number for the GPIO chip
* @mockdev: class device used by the deprecated sysfs interface (may be
* NULL)
* @owner: helps prevent removal of modules exporting active GPIOs
@@ -47,9 +47,9 @@
* userspace.
*/
struct gpio_device {
- int id;
struct device dev;
struct cdev chrdev;
+ int id;
struct device *mockdev;
struct module *owner;
struct gpio_chip *chip;
@@ -72,6 +72,11 @@ struct gpio_device {
#endif
};

+static inline struct gpio_device *to_gpio_device(struct device *dev)
+{
+ return container_of(dev, struct gpio_device, dev);
+}
+
/* gpio suffixes used for ACPI and device tree lookup */
static __maybe_unused const char * const gpio_suffixes[] = { "gpios", "gpio" };

--
2.35.1
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