michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: pinctrl: stm32: Ignore NO_REMAP pins when handling AFIO remaps

Browse source 
Some peripherals (e.g. ethernet) have remaps only on some of the pins.
Pins without remaps do not conflict and must be ignored to correctly
process the remaps.

Signed-off-by: Vegard Storheil Eriksen <zyp@jvnv.net>
This commit is contained in:
Vegard Storheil Eriksen 2025-01-03 00:01:06 +01:00 • committed by Benjamin Cabé
commit 3dc60a68c4
1 changed files with 11 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

18
drivers/pinctrl/pinctrl_stm32.c
View file

@ -169,19 +169,23 @@ static int stm32_pins_remap(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt)
uint32_t reg_val;
uint16_t remap;
remap = (uint16_t)STM32_DT_PINMUX_REMAP(pins[0].pinmux);
remap = NO_REMAP;
for (size_t i = 0U; i < pin_cnt; i++) {
if (remap == NO_REMAP) {
remap = STM32_DT_PINMUX_REMAP(pins[i].pinmux);
} else if (STM32_DT_PINMUX_REMAP(pins[i].pinmux) == NO_REMAP) {
continue;
} else if (STM32_DT_PINMUX_REMAP(pins[i].pinmux) != remap) {
return -EINVAL;
}
}
/* not remappable */
if (remap == NO_REMAP) {
return 0;
}
for (size_t i = 1U; i < pin_cnt; i++) {
if (STM32_DT_PINMUX_REMAP(pins[i].pinmux) != remap) {
return -EINVAL;
}
}
/* A valid remapping configuration is available */
/* Apply remapping before proceeding with pin configuration */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_AFIO);