linux-kernel - [PATCH 5.16 122/186] arm64: dts: rockchip: fix Quartz64-A ddr regulator voltage

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Date:   Mon,  7 Mar 2022 10:19:20 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Peter Geis <pgwipeout@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 122/186] arm64: dts: rockchip: fix Quartz64-A ddr regulator voltage

From: Peter Geis <pgwipeout@...il.com>

[ Upstream commit ad02776cf8d083e28b1ca4d93d8b1949668c27cc ]

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>
Link: https://lore.kernel.org/r/20220128003809.3291407-2-pgwipeout@gmail.com
Signed-off-by: Heiko Stuebner <heiko@...ech.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 4d4b2a301b1a..f6290538c8a4 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 @@
 			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 {
-- 
2.34.1