drivers: dac: Update Renesas DAC driver to support for RA4

Update Renesas DAC driver to support DAC for RA4

Signed-off-by: Khoa Nguyen <[email protected]>

Author: khoa-nguyen-18

drivers/dac/dac_renesas_ra.c

@@ -14,6 +14,10 @@
 
 LOG_MODULE_REGISTER(dac_renesas_ra, CONFIG_DAC_LOG_LEVEL);
 
+#define HAS_CHARGEPUMP       DT_PROP(DT_PARENT(DT_DRV_INST(0)), has_chargepump)
+#define HAS_OUTPUT_AMPLIFIER DT_PROP(DT_PARENT(DT_DRV_INST(0)), has_output_amplifier)
+#define HAS_INTERNAL_OUTPUT  DT_PROP(DT_PARENT(DT_DRV_INST(0)), has_internal_output)
+
 struct dac_renesas_ra_config {
 	const struct pinctrl_dev_config *pcfg;
 };
@@ -46,7 +50,9 @@ static int dac_renesas_ra_channel_setup(const struct device *dev,
 					const struct dac_channel_cfg *channel_cfg)
 {
 	struct dac_renesas_ra_data *data = dev->data;
+#if (HAS_OUTPUT_AMPLIFIER || HAS_CHARGEPUMP || HAS_INTERNAL_OUTPUT)
 	dac_extended_cfg_t *config_extend = (dac_extended_cfg_t *)data->f_config.p_extend;
+#endif
 	fsp_err_t fsp_err;
 
 	if (channel_cfg->channel_id != 0) {
@@ -66,9 +72,9 @@ static int dac_renesas_ra_channel_setup(const struct device *dev,
 		}
 	}
 
-#if DT_PROP(DT_PARENT(DT_DRV_INST(0)), has_output_amplifier)
+#if HAS_OUTPUT_AMPLIFIER
 	config_extend->output_amplifier_enabled = channel_cfg->buffered;
-#elif DT_PROP(DT_PARENT(DT_DRV_INST(0)), has_chargepump)
+#elif HAS_CHARGEPUMP
 #if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(moco))
 	config_extend->enable_charge_pump = channel_cfg->buffered;
 #else
@@ -84,7 +90,7 @@ static int dac_renesas_ra_channel_setup(const struct device *dev,
 	}
 #endif
 
-#if DT_PROP(DT_PARENT(DT_DRV_INST(0)), has_internal_output)
+#if HAS_INTERNAL_OUTPUT
 	config_extend->internal_output_enabled = channel_cfg->internal;
 #else
 	if (channel_cfg->internal) {

dts/bindings/dac/renesas,ra-dac-global.yaml

@@ -10,16 +10,24 @@ include: [base.yaml]
 properties:
   has-internal-output:
     type: boolean
-    description: True if the SoC supports the internal output feature in the DAC HWIP
+    description: |
+      True if the SoC supports the "internal output" feature in the DAC HWIP.
+      Note: If the SoC doesn't support this "internal output" features,
+            it cannot support the "internal" feature.
 
   has-output-amplifier:
     type: boolean
-    description: True if the SoC supports the output amplifier feature in the DAC HWIP
+    description: |
+      True if the SoC supports the "output amplifier" feature in the DAC HWIP.
 
   has-chargepump:
     type: boolean
-    description: True if the SoC supports the chargepump feature in the DAC HWIP
+    description: |
+      True if the SoC supports the "chargepump" feature in the DAC HWIP.
+      Note: If the SoC doesn't support the "output amplifier" and "charge pump" features,
+            it cannot support the "buffer" feature.
 
   has-davrefcr:
     type: boolean
-    description: True if the SoC supports the D/A VREF configuration in the DAC HWIP
+    description: |
+      True if the SoC supports the D/A VREF configuration in the DAC HWIP.