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| author | Thierry Reding <treding@nvidia.com> | 2020-03-19 13:27:29 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-03-27 11:34:53 +0100 |
| commit | 2ab73c6d8323fa1eb02c16c07c40ba2ed17da729 (patch) | |
| tree | 63248ef39eecb4f2ddb7bb8ad7607fcb3747bcec /drivers/gpio | |
| parent | da3f594737cfa24c44769ff17ce2643f85eb0ef5 (diff) | |
| download | linux-2ab73c6d8323fa1eb02c16c07c40ba2ed17da729.tar.gz linux-2ab73c6d8323fa1eb02c16c07c40ba2ed17da729.tar.bz2 linux-2ab73c6d8323fa1eb02c16c07c40ba2ed17da729.zip | |
gpio: Support GPIO controllers without pin-ranges
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>
Link: https://lore.kernel.org/r/20200319122737.3063291-2-thierry.reding@gmail.com
Tested-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index c7ee224bcb86..4a36164843d9 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -2745,7 +2745,10 @@ 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); |