linux-kernel - [PATCH] arm64: dts: qcom: sm8450-hdk: use recommended drive strength for speaker SD

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Message-Id: <20230308142712.277659-1-krzysztof.kozlowski@linaro.org>
Date:   Wed,  8 Mar 2023 15:27:12 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH] arm64: dts: qcom: sm8450-hdk: use recommended drive strength for speaker SD_N

Downstream DTS (and sc8280xp-lenovo-thinkpad-x13s with the same
speakers) uses 16 mA drive strength for the WSA8835 speaker SD_N
reset/shutdown pin.  Use the same for HDK8450, as it is seem the
recommended value.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

Not adding Fixes tag because 4 mA seems to work, so this is just
choosing safer value, based on downstream DTS.
---
 arch/arm64/boot/dts/qcom/sm8450-hdk.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
index 9fa1a83d9554..e04de4bb7fae 100644
--- a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
+++ b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
@@ -754,7 +754,7 @@ &tlmm {
 	spkr_1_sd_n_active: spkr-1-sd-n-active-state {
 		pins = "gpio1";
 		function = "gpio";
-		drive-strength = <4>;
+		drive-strength = <16>;
 		bias-disable;
 		output-low;
 	};
@@ -762,7 +762,7 @@ spkr_1_sd_n_active: spkr-1-sd-n-active-state {
 	spkr_2_sd_n_active: spkr-2-sd-n-active-state {
 		pins = "gpio89";
 		function = "gpio";
-		drive-strength = <4>;
+		drive-strength = <16>;
 		bias-disable;
 		output-low;
 	};
-- 
2.34.1