linux-kernel - [PATCH] arm64: dts: qcom: msm8998-mtp: Increase load on l21 for sdcard

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Date:   Tue, 18 Dec 2018 11:04:43 -0700
From:   Jeffrey Hugo <jhugo@...eaurora.org>
To:     andy.gross@...aro.org, david.brown@...aro.org
Cc:     robh+dt@...nel.org, mark.rutland@....com,
        bjorn.andersson@...aro.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jeffrey Hugo <jhugo@...eaurora.org>
Subject: [PATCH] arm64: dts: qcom: msm8998-mtp: Increase load on l21 for sdcard

l21 is used as sdcard vmmc, and needs the load increased to prevent
voltage drop issues with some sdcards.  This addresses -84 errors seen
during sdcard init with SDR104 cards.

Signed-off-by: Jeffrey Hugo <jhugo@...eaurora.org>
---
 arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi b/arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi
index 50e9033..288adbf 100644
--- a/arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi
@@ -192,6 +192,8 @@
 		vreg_l21a_2p95: l21 {
 			regulator-min-microvolt = <2960000>;
 			regulator-max-microvolt = <2960000>;
+			regulator-allow-set-load;
+			regulator-system-load = <800000>;
 		};
 		vreg_l22a_2p85: l22 {
 			regulator-min-microvolt = <2864000>;
-- 
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