From: Phil Elwell <[email protected]> When dynamically unloading overlays, it is important that freed pins are restored to being inputs to prevent functions from being enabled in multiple places at once.
Cc: Stefan Wahren <[email protected]> Cc: Eric Anholt <[email protected]> Cc: Stephen Warren <[email protected]> Signed-off-by: Phil Elwell <[email protected]> Signed-off-by: Linus Walleij <[email protected]> --- I want to apply this to cater for my GPIOLIB_IRQCHIP refactorings. --- drivers/pinctrl/bcm/pinctrl-bcm2835.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c index 1d8fc104e26b..2df59d9964a2 100644 --- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c +++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c @@ -844,6 +844,16 @@ static const struct pinctrl_ops bcm2835_pctl_ops = { .dt_free_map = bcm2835_pctl_dt_free_map, }; +static int bcm2835_pmx_free(struct pinctrl_dev *pctldev, + unsigned offset) +{ + struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev); + + /* disable by setting to GPIO_IN */ + bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN); + return 0; +} + static int bcm2835_pmx_get_functions_count(struct pinctrl_dev *pctldev) { return BCM2835_FSEL_COUNT; @@ -903,6 +913,7 @@ static int bcm2835_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, } static const struct pinmux_ops bcm2835_pmx_ops = { + .free = bcm2835_pmx_free, .get_functions_count = bcm2835_pmx_get_functions_count, .get_function_name = bcm2835_pmx_get_function_name, .get_function_groups = bcm2835_pmx_get_function_groups, -- 2.7.4
