linux-kernel - [PATCH v2] ARM: dts: imx7d-sdb: Set VLDO4 outpt to 2.8V for MIPI CSI/DSI

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Date:   Sat,  1 Jul 2017 13:09:11 +0530
From:   mindentropy <mindentropy@...il.com>
To:     festevam@...il.com
Cc:     Gautam Bhat <mindentropy@...il.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/FREESCALE IMX
        / MXC ARM ARCHITECTURE),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2] ARM: dts: imx7d-sdb: Set VLDO4 outpt to 2.8V for MIPI CSI/DSI

From: Gautam Bhat <mindentropy@...il.com>

 * According to mx7sabresd schematics the MIPI CSI/DSI voltage rails
   should be 2.8V but the voltage provided is a maximum of 3.3V and
   minimum of 1.8V. Providing such a higher voltage might damage the
   peripherals and violates the schematic settings.

Signed-off-by: Gautam Bhat <mindentropy@...il.com>
---
Changes in v2:
 - Added subject line according to convention

 arch/arm/boot/dts/imx7d-sdb.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
index 5be01a1bf840..1da1f97ec342 100644
--- a/arch/arm/boot/dts/imx7d-sdb.dts
+++ b/arch/arm/boot/dts/imx7d-sdb.dts
@@ -262,8 +262,8 @@
 			};
 
 			vgen6_reg: vldo4 {
-				regulator-min-microvolt = <1800000>;
-				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <2800000>;
+				regulator-max-microvolt = <2800000>;
 				regulator-always-on;
 			};
 		};
-- 
2.11.0