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pinctrl: qcom: make the pinmuxing strict 

The strict flag in struct pinmux_ops disallows the usage of the same pin
as a GPIO and for another function. Without it, a rouge user-space
process with enough privileges (or even a buggy driver) can request a
used pin as GPIO and drive it, potentially confusing devices or even
crashing the system. Set it globally for all pinctrl-msm users.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Bartosz Golaszewski 2025-09-02 13:59:25 +02:00 committed by Linus Walleij
parent 480dc19524
commit cc85cb96e2
1 changed files with 1 additions and 0 deletions
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drivers/pinctrl/qcom/pinctrl-msm.c
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@ -268,6 +268,7 @@ static const struct pinmux_ops msm_pinmux_ops = {
.function_is_gpio = pinmux_generic_function_is_gpio,
.gpio_request_enable = msm_pinmux_request_gpio,
.set_mux = msm_pinmux_set_mux,
.strict = true,
};
static int msm_config_reg(struct msm_pinctrl *pctrl,