43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
From 5e59ca8ad881317cf15fc4b0e7423cc3d411a969 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Wed, 30 Mar 2022 09:48:41 +0100
|
|
Subject: [PATCH] pinctrl: bcm2835: Only return non-GPIOs to inputs
|
|
|
|
Allowing GPIO state to persist allows the use of gpioset to control
|
|
GPIO levels without having to use the --mode=wait feature.
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
drivers/pinctrl/bcm/pinctrl-bcm2835.c | 12 ++++++------
|
|
1 file changed, 6 insertions(+), 6 deletions(-)
|
|
|
|
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
|
|
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
|
|
@@ -926,9 +926,12 @@ static int bcm2835_pmx_free(struct pinct
|
|
unsigned offset)
|
|
{
|
|
struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
|
|
+ enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);
|
|
+
|
|
+ /* Return non-GPIOs to GPIO_IN */
|
|
+ if (fsel != BCM2835_FSEL_GPIO_IN && fsel != BCM2835_FSEL_GPIO_OUT)
|
|
+ bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN);
|
|
|
|
- /* disable by setting to GPIO_IN */
|
|
- bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN);
|
|
return 0;
|
|
}
|
|
|
|
@@ -970,10 +973,7 @@ static void bcm2835_pmx_gpio_disable_fre
|
|
struct pinctrl_gpio_range *range,
|
|
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);
|
|
+ (void)bcm2835_pmx_free(pctldev, offset);
|
|
}
|
|
|
|
static int bcm2835_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
|