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39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
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From ddceddec2cedffd4af0e54dec3ab54843b1d5894 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Fri, 19 Apr 2024 15:00:52 +0100
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Subject: [PATCH 1043/1085] pinctrl: rp1: Add strict_gpiod module parameter
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Setting strict_gpiod to Y makes libgpiod and the gpiod utilities behave
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as documented, i.e. pins are returned to being GPIO inputs when they are
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released.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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drivers/pinctrl/pinctrl-rp1.c | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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--- a/drivers/pinctrl/pinctrl-rp1.c
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+++ b/drivers/pinctrl/pinctrl-rp1.c
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@@ -573,6 +573,10 @@ static const char * const irq_type_names
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[IRQ_TYPE_LEVEL_LOW] = "level-low",
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};
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+static bool strict_gpiod;
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+module_param(strict_gpiod, bool, 0644);
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+MODULE_PARM_DESC(strict_gpiod, "unless true, outputs remain outputs when freed");
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+
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static int rp1_pinconf_set(struct pinctrl_dev *pctldev,
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unsigned int offset, unsigned long *configs,
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unsigned int num_configs);
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@@ -1201,8 +1205,8 @@ static int rp1_pmx_free(struct pinctrl_d
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struct rp1_pin_info *pin = rp1_get_pin_pctl(pctldev, offset);
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u32 fsel = rp1_get_fsel(pin);
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- /* Return non-GPIOs to GPIO_IN */
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- if (fsel != RP1_FSEL_GPIO) {
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+ /* Return non-GPIOs to GPIO_IN, unless strict_gpiod is set */
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+ if (strict_gpiod || fsel != RP1_FSEL_GPIO) {
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rp1_set_dir(pin, RP1_DIR_INPUT);
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rp1_set_fsel(pin, RP1_FSEL_GPIO);
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}
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