tests: drivers: dac: Add support to test DAC on RA devices

Add support ek_ra8m1, ek_ra8d1, mck_ra8t1, ek_ra6m5,
ek_ra6m4, ek_ra6m3, ek_ra6m2, ek_ra6m1, ek_ra6e2,
fpb_ra6e2, fpb_ra6e1, ek_ra4m3, ek_ra4m2, ek_ra4e2,
ek_ra2a1 to test:
- zephyr/tests/drivers/dac/dac_api
- zephyr/tests/drivers/dac/dac_loopback (except ek_ra2a1)

Signed-off-by: Khoa Nguyen <khoa.nguyen.xh@renesas.com>

Author: khoa-nguyen-18

tests/drivers/dac/dac_api/src/test_dac.c

@@ -99,6 +99,12 @@
 #define DAC_RESOLUTION		10
 #define DAC_CHANNEL_ID		0
 
+#elif DT_HAS_COMPAT_STATUS_OKAY(renesas_ra_dac)
+
+#define DAC_DEVICE_NODE DT_NODELABEL(dac0)
+#define DAC_RESOLUTION  12
+#define DAC_CHANNEL_ID  0
+
 #else
 #error "Unsupported board."
 #endif

tests/drivers/dac/dac_loopback/src/test_dac.c

@@ -165,6 +165,19 @@
 #define ADC_CHANNEL_ID		1
 #define ADC_1ST_CHANNEL_INPUT	NRF_SAADC_INPUT_AIN1
 
+#elif DT_HAS_COMPAT_STATUS_OKAY(renesas_ra_dac)
+
+#define DAC_DEVICE_NODE DT_NODELABEL(dac0)
+#define DAC_RESOLUTION  12
+#define DAC_CHANNEL_ID  0
+
+#define ADC_DEVICE_NODE      DT_NODELABEL(adc0)
+#define ADC_RESOLUTION       12
+#define ADC_GAIN             ADC_GAIN_1
+#define ADC_REFERENCE        ADC_REF_INTERNAL
+#define ADC_ACQUISITION_TIME ADC_ACQ_TIME_DEFAULT
+#define ADC_CHANNEL_ID       0
+
 #else
 #error "Unsupported board."
 #endif