drivers: adc: Adding different compatible for ADC16

Adding different compatible to support ADC16

Signed-off-by: Thinh Le Cong <[email protected]>

Author: Thinh Le Cong

drivers/adc/Kconfig.renesas_ra

@@ -6,7 +6,7 @@
 config ADC_RENESAS_RA
 	bool "Renesas RA ADC"
 	default y
-	depends on DT_HAS_RENESAS_RA_ADC_ENABLED
+	depends on DT_HAS_RENESAS_RA_ADC12_ENABLED || DT_HAS_RENESAS_RA_ADC16_ENABLED
 	select USE_RA_FSP_ADC
 	select PINCTRL
 	help

drivers/adc/adc_renesas_ra.c

@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-#define DT_DRV_COMPAT renesas_ra_adc
-
 #include <zephyr/drivers/adc.h>
 #include <zephyr/drivers/clock_control.h>
 #include <zephyr/drivers/pinctrl.h>
@@ -29,9 +27,6 @@ LOG_MODULE_REGISTER(adc_ra, CONFIG_ADC_LOG_LEVEL);
 #define ADC_AVERAGE_8  ADC_ADD_AVERAGE_EIGHT
 #define ADC_AVERAGE_16 ADC_ADD_AVERAGE_SIXTEEN
 
-#define ADC_RES_12 ADC_RESOLUTION_12_BIT
-#define ADC_RES_16 ADC_RESOLUTION_16_BIT
-
 #define ADC_VARIANT_ADC12 12
 #define ADC_VARIANT_ADC16 16
 
@@ -399,7 +394,7 @@ static int adc_ra_init(const struct device *dev)
 
 #define IRQ_CONFIGURE_DEFINE(idx) .irq_configure = adc_ra_configure_func_##idx
 
-#define ADC_RA_INIT(idx)                                                                           \
+#define ADC_RA_INIT_VARIANT(idx, VARIANT, RES_NUM, RES_ENUM)                                       \
 	IRQ_CONFIGURE_FUNC(idx)                                                                    \
 	PINCTRL_DT_INST_DEFINE(idx);                                                               \
 	static adc_extended_cfg_t g_adc_cfg_extend_##idx = {                                       \
@@ -422,9 +417,9 @@ static int adc_ra_init(const struct device *dev)
 		IF_ENABLED(CONFIG_ADC_ASYNC, (.read_async = adc_ra_read_async))};                     \
 	static const struct adc_ra_config adc_ra_config_##idx = {                                  \
 		.channel_available_mask = DT_INST_PROP(idx, channel_available_mask),               \
-		.variant = DT_INST_PROP(idx, variant),                                             \
+		.variant = VARIANT,                                                                \
 		.reference = DT_INST_ENUM_IDX(idx, reference),                                     \
-		.resolution = DT_INST_PROP(idx, variant),                                          \
+		.resolution = RES_NUM,                                                             \
 		.sampling_time_ns = DT_INST_PROP_OR(idx, sampling_time_ns, UNSPECIFIED),           \
 		.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(idx),                                       \
 		IRQ_CONFIGURE_DEFINE(idx),                                                         \
@@ -438,7 +433,7 @@ static int adc_ra_init(const struct device *dev)
 			{                                                                          \
 				.unit = DT_INST_PROP(idx, unit),                                   \
 				.mode = ADC_MODE_SINGLE_SCAN,                                      \
-				.resolution = UTIL_CAT(ADC_RES_, DT_INST_PROP(idx, variant)),      \
+				.resolution = RES_ENUM,                                            \
 				.alignment = (adc_alignment_t)ADC_ALIGNMENT_RIGHT,                 \
 				.trigger = 0,                                                      \
 				.p_callback = renesas_ra_adc_callback,                             \
@@ -464,4 +459,10 @@ static int adc_ra_init(const struct device *dev)
 	DEVICE_DT_INST_DEFINE(idx, adc_ra_init, NULL, &adc_ra_data_##idx, &adc_ra_config_##idx,    \
 			      POST_KERNEL, CONFIG_ADC_INIT_PRIORITY, &adc_ra_api_##idx)
 
-DT_INST_FOREACH_STATUS_OKAY(ADC_RA_INIT);
+#define DT_DRV_COMPAT renesas_ra_adc12
+DT_INST_FOREACH_STATUS_OKAY_VARGS(ADC_RA_INIT_VARIANT, ADC_VARIANT_ADC12, 12, ADC_RESOLUTION_12_BIT)
+#undef DT_DRV_COMPAT
+
+#define DT_DRV_COMPAT renesas_ra_adc16
+DT_INST_FOREACH_STATUS_OKAY_VARGS(ADC_RA_INIT_VARIANT, ADC_VARIANT_ADC16, 16, ADC_RESOLUTION_16_BIT)
+#undef DT_DRV_COMPAT

dts/bindings/adc/renesas,ra-adc.yaml renamed to dts/bindings/adc/renesas,ra-adc-base.yaml

@@ -1,10 +1,6 @@
-# Copyright (c) 2024 Renesas Electronics Corporation
+# Copyright (c) 2025 Renesas Electronics Corporation
 # SPDX-License-Identifier: Apache-2.0
 
-description: Renesas RA ADC node
-
-compatible: "renesas,ra-adc"
-
 include: [adc-controller.yaml, pinctrl-device.yaml]
 
 properties:
@@ -45,12 +41,6 @@ properties:
         - internal: use internal reference
         - external: use external reference
 
-  variant:
-    type: int
-    enum: [12, 16]
-    default: 12
-    description: Select ADC variant for RA SoC
-
   sampling-time-ns:
     type: int
     description: |

dts/bindings/adc/renesas,ra-adc12.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+description: Renesas RA 12-bit resolution (ADC12) device binding.
+
+compatible: "renesas,ra-adc12"
+
+include: renesas,ra-adc-base.yaml

dts/bindings/adc/renesas,ra-adc16.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+description: Renesas RA 16-bit resolution (ADC16) device binding.
+
+compatible: "renesas,ra-adc16"
+
+include: renesas,ra-adc-base.yaml