From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Stephan Gerhold <stephan@gerhold.net>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Sasha Levin <sashal@kernel.org>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 09/48] arm64: dts: qcom: msm8916: Pull down PDM GPIOs during sleep
Date: Fri, 21 Aug 2020 12:16:25 -0400 [thread overview]
Message-ID: <20200821161704.348164-9-sashal@kernel.org> (raw)
In-Reply-To: <20200821161704.348164-1-sashal@kernel.org>
From: Stephan Gerhold <stephan@gerhold.net>
[ Upstream commit e2ee9edc282961783d519c760bbaa20fed4dec38 ]
The original qcom kernel changed the PDM GPIOs to be pull-down
during sleep at some point. Reportedly this was done because
there was some "leakage at PDM outputs during sleep":
https://source.codeaurora.org/quic/la/kernel/msm-3.10/commit/?id=0f87e08c1cd3e6484a6f7fb3e74e37340bdcdee0
I cannot say how effective this is, but everything seems to work
fine with this change so let's apply the same to mainline just
to be sure.
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20200605185916.318494-3-stephan@gerhold.net
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm64/boot/dts/qcom/msm8916-pins.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
index 1235830ffd0b7..38c0d74767e3f 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
@@ -521,7 +521,7 @@ pinconf {
pins = "gpio63", "gpio64", "gpio65", "gpio66",
"gpio67", "gpio68";
drive-strength = <2>;
- bias-disable;
+ bias-pull-down;
};
};
};
--
2.25.1
parent reply other threads:[~2020-08-21 17:11 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20200821161704.348164-1-sashal@kernel.org>]
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