diff --git a/drivers/clock_control/clock_control_renesas_ra.c b/drivers/clock_control/clock_control_renesas_ra.c
index 072687ad267efcc..cec48cba46c51ac 100644
--- a/drivers/clock_control/clock_control_renesas_ra.c
+++ b/drivers/clock_control/clock_control_renesas_ra.c
@@ -219,7 +219,7 @@ static int clock_control_ra_get_rate(const struct device *dev, clock_control_sub
 
 	switch (clkid & 0xFFFFFF00) {
 	case RA_CLOCK_SCI(0):
-		*rate = FREQ_pclka;
+		*rate = FREQ_pclkb;
 		break;
 	default:
 		return -EINVAL;
diff --git a/dts/arm/renesas/ra/ra-cm23-common.dtsi b/dts/arm/renesas/ra/ra-cm23-common.dtsi
index 4b96b16080dbcfd..90bf4585bad1209 100644
--- a/dts/arm/renesas/ra/ra-cm23-common.dtsi
+++ b/dts/arm/renesas/ra/ra-cm23-common.dtsi
@@ -90,9 +90,7 @@
 
 			clock-source = <&moco>;
 			iclk-div = <16>;
-			pclka-div = <16>;
 			pclkb-div = <16>;
-			pclkc-div = <16>;
 			pclkd-div = <16>;
 			fclk-div = <16>;
 		};