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drivers: pinctrl: nrf: patch pin retain to follow lp mode

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Pins can be configured to retain their config even when the power
domain they belong to is suspended. Update pinctrl_nrf to enable
retain only if the pin has been configured and is not in use
(pincnf is low-power/sleep), disable retain otherwise.

Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>
This commit is contained in:
Bjarki Arge Andreasen 2025-06-25 15:55:03 +02:00 committed by Benjamin Cabé
parent 691b3356f8
commit 652635fab9
1 changed files with 13 additions and 3 deletions
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16
drivers/pinctrl/pinctrl_nrf.c
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@ -483,9 +483,13 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,
}
gpd_requested = true;
}
nrf_gpio_pin_retain_disable(pin);
}
/*
* Pad power domain now on, retain no longer needed
* as pad config will be persists as pad is powered.
*/
nrf_gpio_pin_retain_disable(pin);
#endif /* CONFIG_SOC_NRF54H20_GPD */
if (write != NO_WRITE) {
@ -504,7 +508,13 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,
nrf_gpio_pin_clock_set(pin, NRF_GET_CLOCKPIN_ENABLE(pins[i]));
#endif
#ifdef CONFIG_SOC_NRF54H20_GPD
if (NRF_GET_GPD_FAST_ACTIVE1(pins[i]) == 1U) {
if (NRF_GET_LP(pins[i]) == NRF_LP_ENABLE) {
/*
* Pad power domain may be turned off, and pad is not
* actively used as pincnf is low-power. Enable retain
* to ensure pad output and config persists if pad
* power domain is suspended.
*/
nrf_gpio_pin_retain_enable(pin);
}
#endif /* CONFIG_SOC_NRF54H20_GPD */