[PATCH] arm64: dts: qcom: qrb5165-rb5: fix uSD pins drive strength

* [PATCH] arm64: dts: qcom: qrb5165-rb5: fix uSD pins drive strength
@ 2020-12-17 18:33 Dmitry Baryshkov
  2021-01-15 15:00 ` patchwork-bot+linux-arm-msm
  0 siblings, 1 reply; 2+ messages in thread
From: Dmitry Baryshkov @ 2020-12-17 18:33 UTC (permalink / raw)
  To: Andy Gross, Bjorn Andersson, Rob Herring
  Cc: linux-arm-msm, devicetree, Manivannan Sadhasivam,
	Veerabhadrarao Badiganti

Lower drive strength for microSD data and CMD pins from 16 to 10. This
fixes spurious card removal issues observed on some boards. Also this
change allows us to re-enable 1.8V support, which seems to work with
lowered drive strength.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Fixes: 53a8ccf1c7e5 ("arm64: dts: qcom: rb5: Add support for uSD card")
---
 arch/arm64/boot/dts/qcom/qrb5165-rb5.dts | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
index f3da4b0a63bc..3cb3914b8305 100644
--- a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
+++ b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
@@ -1081,8 +1081,6 @@ &sdhc_2 {
 	vqmmc-supply = <&vreg_l6c_2p96>;
 	cd-gpios = <&tlmm 77 GPIO_ACTIVE_LOW>;
 	bus-width = <4>;
-	/* there seem to be issues with HS400-1.8V mode, so disable it */
-	no-1-8-v;
 	no-sdio;
 	no-emmc;
 };
@@ -1382,13 +1380,13 @@ clk {
 		cmd {
 			pins = "sdc2_cmd";
 			bias-pull-up;
-			drive-strength = <16>;
+			drive-strength = <10>;
 		};
 
 		data {
 			pins = "sdc2_data";
 			bias-pull-up;
-			drive-strength = <16>;
+			drive-strength = <10>;
 		};
 	};
 
-- 
2.29.2


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