linux-kernel - [PATCH AUTOSEL for 4.9 050/281] ARM: dts: imx6qdl-wandboard: Fix audio channel swap

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Message-ID: <20180319155742.13731-50-alexander.levin@microsoft.com>
Date:   Mon, 19 Mar 2018 15:58:49 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Fabio Estevam <fabio.estevam@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.9 050/281] ARM: dts: imx6qdl-wandboard: Fix
 audio channel swap

From: Fabio Estevam <fabio.estevam@....com>

[ Upstream commit 79935915300c5eb88a0e94fa9148a7505c14a02a ]

When running a stress playback/stop loop test on a mx6wandboard channel
swaps can be noticed randomly.

Increasing the SGTL5000 LRCLK pad strength to its maximum value fixes
the issue, so add the 'lrclk-strength' property to avoid the audio
channel swaps.

Signed-off-by: Fabio Estevam <fabio.estevam@....com>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 arch/arm/boot/dts/imx6qdl-wandboard.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/imx6qdl-wandboard.dtsi b/arch/arm/boot/dts/imx6qdl-wandboard.dtsi
index 2b9c2be436f9..47c955458a77 100644
--- a/arch/arm/boot/dts/imx6qdl-wandboard.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-wandboard.dtsi
@@ -88,6 +88,7 @@
 		clocks = <&clks IMX6QDL_CLK_CKO>;
 		VDDA-supply = <&reg_2p5v>;
 		VDDIO-supply = <&reg_3p3v>;
+		lrclk-strength = <3>;
 	};
 };
 
-- 
2.14.1