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drivers: can: nrf: disable pin retention if GPD is enabled

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When GPD is enabled, the pinctrl driver enables pin retention if the
peripheral is in the FAST_ACTIVE1 domain. This seems to break CAN, so
make sure retention is not active.

Investigations on why this is needed are ongoing, however, this makes
CAN functional again with some minor changes.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
This commit is contained in:
Gerard Marull-Paretas 2025-02-06 11:29:21 +01:00 committed by Benjamin Cabé
parent afca69d162
commit e9eee4eb23
1 changed files with 12 additions and 0 deletions
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12
drivers/can/can_nrf.c
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@ -17,6 +17,10 @@
#include <zephyr/drivers/pinctrl.h>
#include <zephyr/irq.h>
#ifdef CONFIG_SOC_NRF54H20_GPD
#include <nrf/gpd.h>
#endif
/* nRF CAN wrapper offsets */
#define CAN_TASKS_START offsetof(NRF_CAN_Type, TASKS_START)
#define CAN_EVENTS_CORE_0 offsetof(NRF_CAN_Type, EVENTS_CORE[0])
@ -177,11 +181,19 @@ static int can_nrf_init(const struct device *dev)
return ret;
}
sys_write32(0U, config->wrapper + CAN_EVENTS_CORE_0);
sys_write32(0U, config->wrapper + CAN_EVENTS_CORE_1);
sys_write32(CAN_INTEN_CORE0_Msk | CAN_INTEN_CORE1_Msk, config->wrapper + CAN_INTEN);
sys_write32(1U, config->wrapper + CAN_TASKS_START);
#ifdef CONFIG_SOC_NRF54H20_GPD
ret = nrf_gpd_retain_pins_set(config->pcfg, false);
if (ret < 0) {
return ret;
}
#endif
config->irq_configure();
ret = can_mcan_configure_mram(dev, config->mrba, config->mram);