linux-kernel - [PATCH] arm64: dts: qcom: msm8939-samsung-a7: Drop internal pull for SD CD

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Message-Id: <20230723-a7sdc2cdnopull-v1-1-699fd730afcb@gerhold.net>
Date:   Sun, 23 Jul 2023 12:54:41 +0200
From:   Stephan Gerhold <stephan@...hold.net>
To:     Bjorn Andersson <andersson@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Lin, Meng-Bo" <linmengbo0689@...tonmail.com>,
        Stephan Gerhold <stephan@...hold.net>
Subject: [PATCH] arm64: dts: qcom: msm8939-samsung-a7: Drop internal pull
 for SD CD

A7 seems to have external pull-up for the SD card chip detect (like
most MSM8916/MSM8939 devices) so drop the internal pull-up. It's not
necessary.

Tested-by: "Lin, Meng-Bo" <linmengbo0689@...tonmail.com>
Signed-off-by: Stephan Gerhold <stephan@...hold.net>
---
 arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts b/arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts
index 66e56ac59998..ba652909d162 100644
--- a/arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts
+++ b/arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts
@@ -448,7 +448,7 @@ sdc2_cd_default: sdc2-cd-default-state {
 		pins = "gpio38";
 		function = "gpio";
 		drive-strength = <2>;
-		bias-pull-up;
+		bias-disable;
 	};
 
 	sensor_i2c_default: sensor-i2c-default-state {

---
base-commit: 34e472f41d9cd04400b80649ce82cfe11fbe135a
change-id: 20230723-a7sdc2cdnopull-3eb4cadf8f1f

Best regards,
-- 
Stephan Gerhold <stephan@...hold.net>