linux-kernel - [PATCH 1/3] arm64: dts: rockchip: fix Quartz64-A ddr regulator voltage

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Message-Id: <20220127010023.3169415-2-pgwipeout@gmail.com>
Date:   Wed, 26 Jan 2022 20:00:21 -0500
From:   Peter Geis <pgwipeout@...il.com>
To:     Rob Herring <robh+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
        Peter Geis <pgwipeout@...il.com>
Cc:     Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] arm64: dts: rockchip: fix Quartz64-A ddr regulator voltage

The Quartz64 Model A uses a voltage divider to ensure ddr voltage is
within specification from the default regulator configuration.
Adjusting this voltage is detrimental, and currently causes the ddr
voltage to be about 0.8v.

Remove the min and max voltage setpoints for the ddr regulator.

Fixes: b33a22a1e7c4 ("arm64: dts: rockchip: add basic dts for Pine64
Quartz64-A")

Signed-off-by: Peter Geis <pgwipeout@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
index 166399b7f13f..d9eb92d59099 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3566-quartz64-a.dts
@@ -285,8 +285,6 @@ regulator-state-mem {
 			vcc_ddr: DCDC_REG3 {
 				regulator-always-on;
 				regulator-boot-on;
-				regulator-min-microvolt = <1100000>;
-				regulator-max-microvolt = <1100000>;
 				regulator-initial-mode = <0x2>;
 				regulator-name = "vcc_ddr";
 				regulator-state-mem {
-- 
2.25.1