From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Enable the VBATTB controller. It provides the clock for RTC.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v6:
- none

Changes in v5:
- dropped the status = "okay"; from vbattb_xtal node

Changes in v4:
- added assigned-clocks, assigned-clock-parents properties
- set vbattb_xtal status = "okay"
- collected tags

Changes in v3:
- updated patch description
- dropped vbattclk
- added renesas,vbattb-load-nanofarads on vbattb
- moved vbattb before vbattb_xtal

Changes in v2:
- none

 arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
index 71424e69939e..30bb4f5a7dfd 100644
--- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
@@ -5,6 +5,7 @@
  * Copyright (C) 2023 Renesas Electronics Corp.
  */
 
+#include <dt-bindings/clock/renesas,r9a08g045-vbattb.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/pinctrl/rzg2l-pinctrl.h>
 
@@ -344,6 +345,17 @@ mux {
 	};
 };
 
+&vbattb {
+	assigned-clocks = <&vbattb VBATTB_MUX>;
+	assigned-clock-parents = <&vbattb VBATTB_XC>;
+	quartz-load-femtofarads = <12500>;
+	status = "okay";
+};
+
+&vbattb_xtal {
+	clock-frequency = <32768>;
+};
+
 &wdt0 {
 	timeout-sec = <60>;
 	status = "okay";
-- 
2.39.2