[RFC PATCH 2/2] riscv: dts: allwinner: Fill in OPPs

[Brandon Cheo Fusi]

Specifies two voltage ranges, in order of increasing stability,
for each OPP. This is heavily inspired by

https://github.com/Tina-Linux/linux-5.4/blob/master/arch/riscv/boot/dts/sunxi/sun20iw1p1.dtsi#L118-L133

and

https://github.com/mangopi-sbc/tina-linux-5.4/blob/0d4903ebd9d2194ad914686d5b0fc1ddacf11a9d/arch/riscv/boot/dts/sunxi/sun20iw1p1.dtsi#L118-L182

Signed-off-by: Brandon Cheo Fusi <fusibrandon13 at gmail.com>
---
 arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi b/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
index 2f1771c19..8e7bc8bd0 100644
--- a/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1s.dtsi
@@ -48,13 +48,17 @@ opp_table_cpu: opp-table-cpu {
 		opp-408000000 {
 			clock-latency-ns = <244144>; /* 8 32k periods */
 			opp-hz = /bits/ 64 <408000000>;
-			opp-microvolt-speed0 = <900000 900000 1100000>;
+
+			opp-microvolt-speed0 = <950000 900000 1100000>;
+			opp-microvolt-speed1 = <900000 900000 1100000>;
 		};
 
 		opp-1080000000 {
 			clock-latency-ns = <244144>; /* 8 32k periods */
 			opp-hz = /bits/ 64 <1008000000>;
-			opp-microvolt-speed0 = <900000 900000 1100000>;
+
+			opp-microvolt-speed0 = <1100000 900000 1100000>;
+			opp-microvolt-speed1 = <950000 900000 1100000>;
 		};
 	};
 
-- 
2.30.2