From: Théo Lebrun theo.lebrun@bootlin.com
[ Upstream commit 53cf6b72e074864b94ade97dcb6f30b5ac1a82dc ]
Previously, the statement looked like:
slpm[x] &= ~BIT(g->grp.pins[i]);
Where: - slpm is a unsigned int pointer; - g->grp.pins[i] is a pin number. It can grow to more than 32.
The expected shift amount is a pin bank offset.
This bug does not occur on every group or pin: the altsetting must be NMK_GPIO_ALT_C and the pin must be 32 or above. It might have occured. For example, in pinctrl-nomadik-db8500.c, pin group i2c3_c_2 has the right altsetting and pins 229 and 230.
Fixes: dbfe8ca259e1 ("pinctrl/nomadik: implement pin multiplexing") Reviewed-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Théo Lebrun theo.lebrun@bootlin.com Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-5-3ba757474006@bootlin.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/nomadik/pinctrl-nomadik.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.c b/drivers/pinctrl/nomadik/pinctrl-nomadik.c index 7911353ac97d5..4f7c4af4f93cb 100644 --- a/drivers/pinctrl/nomadik/pinctrl-nomadik.c +++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.c @@ -1579,8 +1579,10 @@ static int nmk_pmx_set(struct pinctrl_dev *pctldev, unsigned function, * Then mask the pins that need to be sleeping now when we're * switching to the ALT C function. */ - for (i = 0; i < g->grp.npins; i++) - slpm[g->grp.pins[i] / NMK_GPIO_PER_CHIP] &= ~BIT(g->grp.pins[i]); + for (i = 0; i < g->grp.npins; i++) { + unsigned int bit = g->grp.pins[i] % NMK_GPIO_PER_CHIP; + slpm[g->grp.pins[i] / NMK_GPIO_PER_CHIP] &= ~BIT(bit); + } nmk_gpio_glitch_slpm_init(slpm); }