Add SARARC node and associated regulator to support reading the
ADC inputs on the Vega S95

Suggested-by: Christian Hewitt <[email protected]>
Signed-off-by: Neil Armstrong <[email protected]>
---
 arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95.dtsi
index be8799653ad7..4d2aa4dc59e7 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95.dtsi
@@ -54,6 +54,13 @@
                regulator-max-microvolt = <3300000>;
        };
 
+       vddio_ao18: regulator-vddio_ao18 {
+               compatible = "regulator-fixed";
+               regulator-name = "VDDIO_AO18";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+       };
+
        vcc_3v3: regulator-vcc_3v3 {
                compatible = "regulator-fixed";
                regulator-name = "VCC_3V3";
@@ -152,6 +159,11 @@
        clock-names = "clkin0";
 };
 
+&saradc {
+       status = "okay";
+       vref-supply = <&vddio_ao18>;
+};
+
 /* Wireless SDIO Module */
 &sd_emmc_a {
        status = "okay";
-- 
2.21.0

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