[PATCH v5 1/5] gpio: of: support to add custom add pin range function

[Yixun Lan <dlan@xxxxxxxxxx>]

Export custom function to add gpio pin range from pinctrl
subsystem. This would make it possible to add pins to multi
gpio chips.

Signed-off-by: Yixun Lan <dlan@xxxxxxxxxx>
---
 drivers/gpio/gpiolib-of.c   | 5 ++++-
 include/linux/gpio/driver.h | 7 +++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 2e537ee979f3e2b6e8d5f86f3e121a66f2a8e083..64c8a153b823d65faebed9c4cd87952359b42765 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -1170,7 +1170,10 @@ int of_gpiochip_add(struct gpio_chip *chip)
 	if (chip->of_gpio_n_cells > MAX_PHANDLE_ARGS)
 		return -EINVAL;
 
-	ret = of_gpiochip_add_pin_range(chip);
+	if (!chip->of_add_pin_range)
+		chip->of_add_pin_range = of_gpiochip_add_pin_range;
+
+	ret = chip->of_add_pin_range(chip);
 	if (ret)
 		return ret;
 
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 2dd7cb9cc270a68ddedbcdd5d44e0d0f88dfa785..a7b966c78a2f62075fb7804f6e96028564dda161 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -528,6 +528,13 @@ struct gpio_chip {
 	 */
 	int (*of_xlate)(struct gpio_chip *gc,
 			const struct of_phandle_args *gpiospec, u32 *flags);
+
+	/**
+	 * @of_add_pin_range:
+	 *
+	 * Callback to add pin ranges from pinctrl
+	 */
+	int (*of_add_pin_range)(struct gpio_chip *chip);
 #endif /* CONFIG_OF_GPIO */
 };
 

-- 
2.48.1