drivers: pinctrl: nrf: add flag to signal the FAST_ACTIVE1 peripherals

This patch introduces a new flag to indicate if a peripheral belongs
to FAST_ACTIVE1 domain. This way, pinctrl knows when to request the
SLOW_ACTIVE domain (where CTRLSEL multiplexer resides).

Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>

drivers/pinctrl/pinctrl_nrf.c

@@ -7,6 +7,9 @@
 #include <zephyr/drivers/pinctrl.h>
 
 #include <hal/nrf_gpio.h>
+#ifdef CONFIG_SOC_NRF54H20_GPD
+#include <nrf/gpd.h>
+#endif
 
 BUILD_ASSERT(((NRF_PULL_NONE == NRF_GPIO_PIN_NOPULL) &&
 	      (NRF_PULL_DOWN == NRF_GPIO_PIN_PULLDOWN) &&
@@ -352,6 +355,21 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,
 		if (psel != PSEL_DISCONNECTED) {
 			uint32_t pin = psel;
 
+#ifdef CONFIG_SOC_NRF54H20_GPD
+			if (NRF_GET_GPD_FAST_ACTIVE1(pins[i]) == 1U) {
+				int ret;
+				uint32_t d_pin = pin;
+				NRF_GPIO_Type *port = nrf_gpio_pin_port_decode(&d_pin);
+
+				ret = nrf_gpd_request(NRF_GPD_SLOW_ACTIVE);
+				if (ret < 0) {
+					return ret;
+				}
+
+				port->RETAINCLR = BIT(d_pin);
+			}
+#endif /* CONFIG_SOC_NRF54H20_GPD */
+
 			if (write != NO_WRITE) {
 				nrf_gpio_pin_write(pin, write);
 			}
@@ -367,6 +385,20 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,
 #if NRF_GPIO_HAS_CLOCKPIN
 			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) {
+				int ret;
+				uint32_t d_pin = pin;
+				NRF_GPIO_Type *port = nrf_gpio_pin_port_decode(&d_pin);
+
+				port->RETAINSET = BIT(d_pin);
+
+				ret = nrf_gpd_release(NRF_GPD_SLOW_ACTIVE);
+				if (ret < 0) {
+					return ret;
+				}
+			}
+#endif /* CONFIG_SOC_NRF54H20_GPD */
 		}
 	}
 

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

@@ -10,7 +10,9 @@
  * The whole nRF pin configuration information is encoded in a 32-bit bitfield
  * organized as follows:
  *
- * - 31..18: Pin function.
+ * - 31..24: Pin function.
+ * - 19-23:  Reserved.
+ * - 18:     Associated peripheral belongs to GD FAST ACTIVE1 (nRF54H only)
  * - 17:     Clockpin enable.
  * - 16:     Pin inversion mode.
  * - 15:     Pin low power mode.
@@ -25,9 +27,13 @@
  */
 
 /** Position of the function field. */
-#define NRF_FUN_POS 18U
+#define NRF_FUN_POS 24U
 /** Mask for the function field. */
-#define NRF_FUN_MSK 0x3FFFU
+#define NRF_FUN_MSK 0xFFU
+/** Position of the GPD FAST ACTIVE1 */
+#define NRF_GPD_FAST_ACTIVE1_POS 18U
+/** Mask for the GPD FAST ACTIVE1 */
+#define NRF_GPD_FAST_ACTIVE1_MSK 0x1U
 /** Position of the clockpin enable field. */
 #define NRF_CLOCKPIN_ENABLE_POS 17U
 /** Mask for the clockpin enable field. */

soc/nordic/common/pinctrl_soc.h

@@ -14,6 +14,7 @@
 
 #include <zephyr/devicetree.h>
 #include <zephyr/dt-bindings/pinctrl/nrf-pinctrl.h>
+#include <zephyr/dt-bindings/power/nordic-nrf-gpd.h>
 #include <zephyr/types.h>
 
 #ifdef __cplusplus
@@ -55,6 +56,16 @@ typedef uint32_t pinctrl_soc_pin_t;
 			(), NRF_GET_FUN(DT_PROP_BY_IDX(node_id, prop, idx)))        \
 		      0)), (0))
 
+/**
+ * @brief Utility macro to get the GPD_FAST_ACTIVE1 flag
+ *
+ * @param p_node_id Parent node identifier.
+ */
+#define Z_GET_GPD_FAST_ACTIVE1(p_node_id)				       \
+	COND_CODE_1(DT_NODE_HAS_PROP(p_node_id, power_domains),		       \
+		    ((DT_PHA(p_node_id, power_domains, id) ==		       \
+		      NRF_GPD_FAST_ACTIVE1) << NRF_GPD_FAST_ACTIVE1_POS), (0))
+
 /**
  * @brief Utility macro to initialize each pin.
  *
@@ -70,7 +81,8 @@ typedef uint32_t pinctrl_soc_pin_t;
 	 (DT_PROP(node_id, nordic_drive_mode) << NRF_DRIVE_POS) |	       \
 	 ((NRF_LP_ENABLE * DT_PROP(node_id, low_power_enable)) << NRF_LP_POS) |\
 	 (DT_PROP(node_id, nordic_invert) << NRF_INVERT_POS) |		       \
-	 Z_GET_CLOCKPIN_ENABLE(node_id, prop, idx, p_node_id)		       \
+	 Z_GET_CLOCKPIN_ENABLE(node_id, prop, idx, p_node_id) |		       \
+	 Z_GET_GPD_FAST_ACTIVE1(p_node_id)				       \
 	),
 
 /**
@@ -99,6 +111,14 @@ typedef uint32_t pinctrl_soc_pin_t;
 #define NRF_GET_CLOCKPIN_ENABLE(pincfg) \
 	(((pincfg) >> NRF_CLOCKPIN_ENABLE_POS) & NRF_CLOCKPIN_ENABLE_MSK)
 
+/**
+ * @brief Utility macro to obtain GPD_FAST_ACTIVE1 flag
+ *
+ * @param pincfg Pin configuration bit field.
+ */
+#define NRF_GET_GPD_FAST_ACTIVE1(pincfg) \
+	(((pincfg) >> NRF_GPD_FAST_ACTIVE1_POS) & NRF_GPD_FAST_ACTIVE1_MSK)
+
 /**
  * @brief Utility macro to obtain pin inversion flag.
  *