diff mbox series

[1/9] gpio: Support GPIO controllers without pin-ranges

Message ID 20200319122737.3063291-2-thierry.reding@gmail.com
State New
Headers show
Series [1/9] gpio: Support GPIO controllers without pin-ranges | expand

Commit Message

Thierry Reding March 19, 2020, 12:27 p.m. UTC 
From: Thierry Reding <treding@nvidia.com>

Wake gpiochip_generic_request() call into the pinctrl helpers only if a
GPIO controller had any pin-ranges assigned to it. This allows a driver
to unconditionally use this helper if it supports multiple devices of
which only a subset have pin-ranges assigned to them.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpio/gpiolib.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index f31b1d46599e..12f3c339da78 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2792,7 +2792,10 @@  static inline void gpiochip_irqchip_free_valid_mask(struct gpio_chip *gpiochip)
  */
 int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset)
 {
-	return pinctrl_gpio_request(chip->gpiodev->base + offset);
+	if (!list_empty(&chip->gpiodev->pin_ranges))
+		return pinctrl_gpio_request(chip->gpiodev->base + offset);
+
+	return 0;
 }
 EXPORT_SYMBOL_GPL(gpiochip_generic_request);