drivers: dai: esai: support applying default pin configuration

Add support for applying the default pin configuration.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>

drivers/dai/nxp/esai/Kconfig.esai

@@ -1,9 +1,10 @@
-# Copyright 2024 NXP
+# Copyright 2024-2025 NXP
 # SPDX-License-Identifier: Apache-2.0
 
 config DAI_NXP_ESAI
 	bool "NXP Enhanced Serial Audio Interface (ESAI) driver"
 	default y
 	depends on DT_HAS_NXP_DAI_ESAI_ENABLED
+	select PINCTRL
 	help
 		Select this to enable NXP ESAI driver.

drivers/dai/nxp/esai/esai.c

@@ -740,6 +740,12 @@ static int esai_init(const struct device *dev)
 	}
 #endif /* CONFIG_PM_DEVICE_RUNTIME */
 
+	/* note: optional operation so -ENOENT is allowed */
+	ret = pinctrl_apply_state(cfg->pincfg, PINCTRL_STATE_DEFAULT);
+	if (ret < 0 && ret != -ENOENT) {
+		return ret;
+	}
+
 	ret = esai_parse_pinmodes(cfg, data);
 	if (ret < 0) {
 		return ret;
@@ -750,6 +756,8 @@ static int esai_init(const struct device *dev)
 
 #define ESAI_INIT(inst)							\
 									\
+PINCTRL_DT_INST_DEFINE(inst);						\
+									\
 BUILD_ASSERT(ESAI_TX_FIFO_WATERMARK(inst) >= 1 &&			\
 	     ESAI_TX_FIFO_WATERMARK(inst) <= _ESAI_FIFO_DEPTH(inst),	\
 	     "invalid TX watermark value");				\
@@ -806,6 +814,7 @@ static struct esai_config esai_config_##inst = {			\
 	.clock_cfg = clock_cfg_##inst,					\
 	.clock_cfg_size = ARRAY_SIZE(clock_cfg_##inst),			\
 	.clk_data = ESAI_CLOCK_DATA_DECLARE(inst),			\
+	.pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(inst),			\
 };									\
 									\
 static struct esai_data esai_data_##inst = {				\

drivers/dai/nxp/esai/esai.h

@@ -12,6 +12,7 @@
 #include <zephyr/device.h>
 #include <zephyr/dt-bindings/dai/esai.h>
 #include <zephyr/drivers/clock_control.h>
+#include <zephyr/drivers/pinctrl.h>
 
 #include <fsl_esai.h>
 
@@ -218,6 +219,7 @@ struct esai_config {
 	uint32_t *clock_cfg;
 	uint32_t clock_cfg_size;
 	struct esai_clock_data clk_data;
+	const struct pinctrl_dev_config *pincfg;
 };
 
 /* this needs to perfectly match SOF's struct sof_ipc_dai_esai_params */