drivers: i2s: Initial driver support for SSIE on Renesas RA

Add i2s driver support for Renesas RA SSIE

Signed-off-by: Khoa Tran <khoa.tran.yj@bp.renesas.com>

drivers/i2s/CMakeLists.txt

@@ -17,3 +17,4 @@ zephyr_library_sources_ifdef(CONFIG_I2S_ESP32		i2s_esp32.c)
 zephyr_library_sources_ifdef(CONFIG_I2S_SILABS_SIWX91X	i2s_silabs_siwx91x.c)
 zephyr_library_sources_ifdef(CONFIG_I2S_TEST		i2s_test.c)
 zephyr_library_sources_ifdef(CONFIG_I2S_STM32_SAI   i2s_stm32_sai.c)
+zephyr_library_sources_ifdef(CONFIG_I2S_RENESAS_RA_SSIE  i2s_renesas_ra_ssie.c)

drivers/i2s/Kconfig.renesas_ra

@@ -0,0 +1,32 @@
+# Renesas RA Family
+
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config I2S_RENESAS_RA_SSIE
+	bool "Renesas RA I2S SSIE"
+	default y
+	depends on DT_HAS_RENESAS_RA_I2S_SSIE_ENABLED
+	select USE_RA_FSP_SSI
+	select PINCTRL
+	help
+	  Enable Renesas RA I2S SSIE Driver.
+
+if I2S_RENESAS_RA_SSIE
+
+config I2S_RENESAS_RA_SSIE_DTC
+	bool "DTC on Transmission and Reception"
+	default y
+	select USE_RA_FSP_DTC
+	help
+	  Enable DTC on transmission and reception
+
+config I2S_RENESAS_RA_SSIE_RX_BLOCK_COUNT
+	int "RX queue length"
+	default 4
+
+config I2S_RENESAS_RA_SSIE_TX_BLOCK_COUNT
+	int "TX queue length"
+	default 4
+
+endif # I2S_RENESAS_RA_SSIE

dts/bindings/i2s/renesas,ra-i2s-ssie.yaml

@@ -0,0 +1,62 @@
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+description: Renesas RA I2S controller
+
+compatible: "renesas,ra-i2s-ssie"
+
+include: [i2s-controller.yaml, pinctrl-device.yaml]
+
+properties:
+  reg:
+    required: true
+
+  channel:
+    required: true
+    type: int
+
+  clocks:
+    required: true
+
+  clock-names:
+    required: true
+    enum:
+      - "pclk"
+      - "audio-clock"
+
+  pinctrl-0:
+    required: true
+
+  pinctrl-names:
+    required: true
+
+  interrupts:
+    required: true
+
+  interrupt-names:
+    required: true
+    enum:
+      - "ssi_txi"
+      - "ssi_rxi"
+      - "ssi_if"
+      - "ssi_rt"
+    description: |
+      A list of interrupt identifiers that correspond to the interrupt lines
+      provided in the `interrupts` property. The names must be listed in the
+      same order as their matching entries in `interrupts`.
+
+      Common configurations based on the operating mode:
+
+      - Full-duplex mode: "ssi_txi", "ssi_rxi", "ssi_if"
+          "ssi_txi": Transmit interrupt
+          "ssi_rxi": Receive interrupt
+          "ssi_if" : Idle/Error interrupt
+
+      - Half-duplex mode: "ssi_rt", "ssi_if"
+          "ssi_rt" : Combined receive/transmit interrupt
+          "ssi_if" : Idle/Error interrupt
+
+  full-duplex:
+    type: boolean
+    description: |
+      Indicates whether the device node supports full-duplex operation.

modules/Kconfig.renesas

@@ -191,6 +191,11 @@ config USE_RA_FSP_ELC
 	help
 	  Enable RA FSP ELC driver
 
+config USE_RA_FSP_SSI
+	bool
+	help
+	  Enable RA FSP I2S SSI driver
+
 endif # HAS_RENESAS_RA_FSP
 
 if HAS_RENESAS_RZ_FSP