drivers: pinctrl: Add sdif configs to ambiq pinctrl driver

Added sdio cd and wp pin configs to ambiq pinctrl driver

Signed-off-by: Hao Luo <[email protected]>

Author: AlessandroLuo

drivers/pinctrl/pinctrl_ambiq.c

@@ -45,6 +45,17 @@ static void pinctrl_configure_pin(const pinctrl_soc_pin_t *pin)
 	pin_config.GP.cfg_b.eDriveStrength = pin->drive_strength;
 #if defined(CONFIG_SOC_SERIES_APOLLO4X)
 	pin_config.GP.cfg_b.uSlewRate = pin->slew_rate;
+	switch (pin->sdif_cdwp) {
+	case 1:
+		am_hal_gpio_cd_pin_config(pin->pin_num);
+		break;
+	case 2:
+		am_hal_gpio_wp_pin_config(pin->pin_num);
+		break;
+	default:
+		/* not a sdif pin */
+		break;
+	}
 #else
 	switch (pin->sdif_cdwp) {
 	case 1:

dts/bindings/pinctrl/ambiq,apollo4-pinctrl.yaml

@@ -161,3 +161,11 @@ child-binding:
           Polarity select for NCE
           LOW = 0x0 - Polarity is active low
           HIGH = 0x1 - Polarity is active high
+      ambiq,sdif-cdwp:
+        type: int
+        default: 0
+        description: |
+          Configure SD Card Detection and Write Protection pin
+          0x0 - Not SDIF pin
+          0x1 - SDIFCD
+          0x2 - SDIFWP

soc/ambiq/apollo4x/pinctrl_soc.h

@@ -39,6 +39,8 @@ struct apollo4_pinctrl_soc_pin {
 	uint32_t nce : 6;
 	/** nCE module polarity */
 	uint32_t nce_pol: 1;
+	/** SDIF CD WP pad select */
+	uint32_t sdif_cdwp: 2;
 };
 
 typedef struct apollo4_pinctrl_soc_pin pinctrl_soc_pin_t;
@@ -65,6 +67,7 @@ typedef struct apollo4_pinctrl_soc_pin pinctrl_soc_pin_t;
 		DT_ENUM_IDX(node_id, ambiq_pull_up_ohms),                                          \
 		DT_PROP(node_id, ambiq_nce_src),                                                   \
 		DT_PROP(node_id, ambiq_nce_pol),                                                   \
+		DT_PROP(node_id, ambiq_sdif_cdwp),                                                 \
 	},
 
 /**