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- From 2e4f06a9b7276db1e2dafe33564ad5115f63a210 Mon Sep 17 00:00:00 2001
- From: Phil Elwell <phil@raspberrypi.org>
- Date: Fri, 6 May 2016 12:32:47 +0100
- Subject: [PATCH 321/381] pinctrl-bcm2835: Return pins to inputs when freed
- 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.
- Signed-off-by: Phil Elwell <phil@raspberrypi.org>
- ---
- drivers/pinctrl/bcm/pinctrl-bcm2835.c | 10 ++++++++++
- 1 file changed, 10 insertions(+)
- --- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
- +++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
- @@ -831,6 +831,15 @@ static const struct pinctrl_ops bcm2835_
- .dt_free_map = bcm2835_pctl_dt_free_map,
- };
-
- +static void 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);
- +}
- +
- static int bcm2835_pmx_get_functions_count(struct pinctrl_dev *pctldev)
- {
- return BCM2835_FSEL_COUNT;
- @@ -890,6 +899,7 @@ static int bcm2835_pmx_gpio_set_directio
- }
-
- 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,
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