From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Let's start adding getters for the opaque struct gpio_device. Start with
a function allowing to retrieve the base GPIO number.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
---
drivers/gpio/gpiolib.c | 13 +++++++++++++
include/linux/gpio/driver.h | 3 +++
2 files changed, 16 insertions(+)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 9637a79a9a60..9715bbc698e9 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -233,6 +233,19 @@ struct gpio_device *gpiod_to_device(struct gpio_desc *desc)
}
EXPORT_SYMBOL_GPL(gpiod_to_device);
+/**
+ * gpio_device_get_base() - Get the base GPIO number allocated by this device
+ * @gdev: GPIO device
+ *
+ * Returns:
+ * First GPIO number in the global GPIO numberspace for this device.
+ */
+int gpio_device_get_base(struct gpio_device *gdev)
+{
+ return gdev->base;
+}
+EXPORT_SYMBOL_GPL(gpio_device_get_base);
+
/* dynamic allocation of GPIOs, e.g. on a hotplugged device */
static int gpiochip_find_base(int ngpio)
{
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index e3747e730ed1..b68b3493b29d 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -780,6 +780,9 @@ void gpiochip_unlock_as_irq(struct gpio_chip *gc, unsigned int offset);
struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);
struct gpio_device *gpiod_to_device(struct gpio_desc *desc);
+/* struct gpio_device getters */
+int gpio_device_get_base(struct gpio_device *gdev);
+
#else /* CONFIG_GPIOLIB */
#include <linux/err.h>
--
2.39.2
