[nrf fromlist] drivers: pinctrl_nrf: Add support for EXMIF pins

This is a follow-up to commit 45d827a.

Although routing for those pins is configured via UICR, pinctrl still
needs to be involved so that it is possible to set desired drive mode
for them etc.
Add also the missing RWDS pin.

Signed-off-by: Andrzej Głąbek <[email protected]>
(cherry picked from commit 2e243281b6a7fb27e44f142ee702ab0ff76cc79f)

Upstream PR: zephyrproject-rtos/zephyr#80042

Author: anangl

drivers/pinctrl/pinctrl_nrf.c

@@ -344,6 +344,24 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,
 			input = NRF_GPIO_PIN_INPUT_CONNECT;
 			break;
 #endif /* DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_can) */
+#if DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_exmif)
+		/* Pin routing is controlled by secure domain, via UICR */
+		case NRF_FUN_EXMIF_CK:
+		case NRF_FUN_EXMIF_DQ0:
+		case NRF_FUN_EXMIF_DQ1:
+		case NRF_FUN_EXMIF_DQ2:
+		case NRF_FUN_EXMIF_DQ3:
+		case NRF_FUN_EXMIF_DQ4:
+		case NRF_FUN_EXMIF_DQ5:
+		case NRF_FUN_EXMIF_DQ6:
+		case NRF_FUN_EXMIF_DQ7:
+		case NRF_FUN_EXMIF_CS0:
+		case NRF_FUN_EXMIF_CS1:
+		case NRF_FUN_EXMIF_RWDS:
+			dir = NRF_GPIO_PIN_DIR_INPUT;
+			input = NRF_GPIO_PIN_INPUT_DISCONNECT;
+			break;
+#endif /* DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_exmif) */
 		default:
 			return -ENOTSUP;
 		}

include/zephyr/dt-bindings/pinctrl/nrf-pinctrl.h

@@ -156,6 +156,8 @@
 #define NRF_FUN_CAN_TX 46U
 /** CAN RX */
 #define NRF_FUN_CAN_RX 47U
+/** EXMIF RWDS */
+#define NRF_FUN_EXMIF_RWDS 50U
 
 /** @} */