linux-kernel - [PATCH] riscv: dts: starfive: Set EMMC vqmmc maximum voltage to 3.3V on JH7110 boards

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Date: Tue, 11 Jun 2024 22:56:41 +0800
From: Shengyu Qu <wiagn233@...look.com>
To: kernel@...il.dk,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	paul.walmsley@...ive.com,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	jszhang@...nel.org,
	devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: Shengyu Qu <wiagn233@...look.com>,
	stable@...r.kernel.org
Subject: [PATCH] riscv: dts: starfive: Set EMMC vqmmc maximum voltage to 3.3V on JH7110 boards

Currently, for JH7110 boards with EMMC slot, vqmmc voltage for EMMC is
fixed to 1.8V, while the spec needs it to be 3.3V on low speed mode and
should support switching to 1.8V when using higher speed mode. Since
there are no other peripherals using the same voltage source of EMMC's
vqmmc(ALDO4) on every board currently supported by mainline kernel,
regulator-max-microvolt of ALDO4 should be set to 3.3V.

Cc: stable@...r.kernel.org
Signed-off-by: Shengyu Qu <wiagn233@...look.com>
Fixes: ac9a37e2d6b6 ("riscv: dts: starfive: introduce a common board dtsi for jh7110 based boards")
---
 arch/riscv/boot/dts/starfive/jh7110-common.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/boot/dts/starfive/jh7110-common.dtsi b/arch/riscv/boot/dts/starfive/jh7110-common.dtsi
index 37b4c294ffcc..c7a549ec7452 100644
--- a/arch/riscv/boot/dts/starfive/jh7110-common.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110-common.dtsi
@@ -244,7 +244,7 @@ emmc_vdd: aldo4 {
 				regulator-boot-on;
 				regulator-always-on;
 				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
 				regulator-name = "emmc_vdd";
 			};
 		};
-- 
2.34.1