[PATCH] arm64: dts: qcom: qcs615-ride: fix sdhc_2 vqmmc-supply for UHS-I mode

[PATCH] arm64: dts: qcom: qcs615-ride: fix sdhc_2 vqmmc-supply for UHS-I mode

[monish.chunara]

From: Monish Chunara <monish.chunara@oss.qualcomm.com>

SD card is detected as SDHS instead of UHS-I because sdhc_2 was
configured with vreg_s4a as vqmmc-supply, which cannot switch
between 1.8V and 3.3V.

Switch vqmmc-supply to vreg_l2a and update its voltage range to
1800000-2960000 uV to enable proper UHS-I signaling.

Signed-off-by: Monish Chunara <monish.chunara@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/qcs615-ride.dts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/qcs615-ride.dts b/arch/arm64/boot/dts/qcom/qcs615-ride.dts
index 51b13b492472..047b4efb04b9 100644
--- a/arch/arm64/boot/dts/qcom/qcs615-ride.dts
+++ b/arch/arm64/boot/dts/qcom/qcs615-ride.dts
@@ -232,8 +232,8 @@ vreg_l1a: ldo1 {
 
 		vreg_l2a: ldo2 {
 			regulator-name = "vreg_l2a";
-			regulator-min-microvolt = <1650000>;
-			regulator-max-microvolt = <3100000>;
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <2960000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
 			regulator-allow-set-load;
 			regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
@@ -599,7 +599,7 @@ &sdhc_2 {
 	cd-gpios = <&tlmm 99 GPIO_ACTIVE_LOW>;
 
 	vmmc-supply = <&vreg_l10a>;
-	vqmmc-supply = <&vreg_s4a>;
+	vqmmc-supply = <&vreg_l2a>;
 
 	status = "okay";
 };
-- 
2.34.1

Re: [PATCH] arm64: dts: qcom: qcs615-ride: fix sdhc_2 vqmmc-supply for UHS-I mode

[Konrad Dybcio]

On 5/22/26 12:50 PM, monish.chunara@oss.qualcomm.com wrote:
> From: Monish Chunara <monish.chunara@oss.qualcomm.com>
> 
> SD card is detected as SDHS instead of UHS-I because sdhc_2 was
> configured with vreg_s4a as vqmmc-supply, which cannot switch
> between 1.8V and 3.3V.
> 
> Switch vqmmc-supply to vreg_l2a and update its voltage range to
> 1800000-2960000 uV to enable proper UHS-I signaling.

The way the commit message is worded almost makes it sound like
switching the supply in DT rewires the hardware power grid.. 

anyway

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH] arm64: dts: qcom: qcs615-ride: fix sdhc_2 vqmmc-supply for UHS-I mode

[Bjorn Andersson]

On Fri, 22 May 2026 16:20:20 +0530, monish.chunara@oss.qualcomm.com wrote:
> SD card is detected as SDHS instead of UHS-I because sdhc_2 was
> configured with vreg_s4a as vqmmc-supply, which cannot switch
> between 1.8V and 3.3V.
> 
> Switch vqmmc-supply to vreg_l2a and update its voltage range to
> 1800000-2960000 uV to enable proper UHS-I signaling.
> 
> [...]

Applied, thanks!

[1/1] arm64: dts: qcom: qcs615-ride: fix sdhc_2 vqmmc-supply for UHS-I mode
      commit: 4614628bea862cbad0ec3323200900a1f34e98c5

Best regards,
-- 
Bjorn Andersson <andersson@kernel.org>