linux-kernel - [PATCH 4.9 009/164] ARM: tegra: paz00: Mark panel regulator as enabled on boot

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Date:   Tue, 23 May 2017 22:07:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Marc Dietrich <marvin24@....de>,
        Misha Komarovskiy <zombah@...il.com>,
        Thierry Reding <treding@...dia.com>
Subject: [PATCH 4.9 009/164] ARM: tegra: paz00: Mark panel regulator as enabled on boot

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Marc Dietrich <marvin24@....de>

commit 0c18927f51f4d390abdcf385bff5f995407ee732 upstream.

Current U-Boot enables the display already. Marking the regulator as
enabled on boot fixes sporadic panel initialization failures.

Signed-off-by: Marc Dietrich <marvin24@....de>
Tested-by: Misha Komarovskiy <zombah@...il.com>
Signed-off-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/boot/dts/tegra20-paz00.dts |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/arm/boot/dts/tegra20-paz00.dts
+++ b/arch/arm/boot/dts/tegra20-paz00.dts
@@ -569,6 +569,7 @@
 			regulator-name = "+3VS,vdd_pnl";
 			regulator-min-microvolt = <3300000>;
 			regulator-max-microvolt = <3300000>;
+			regulator-boot-on;
 			gpio = <&gpio TEGRA_GPIO(A, 4) GPIO_ACTIVE_HIGH>;
 			enable-active-high;
 		};