linux-kernel - Re: [PATCH V2] ARM: dts: imx6q-logicpd: Shutdown LCD regulator during suspend

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Message-ID: <20190411054724.GU26817@dragon>
Date:   Thu, 11 Apr 2019 13:47:25 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Adam Ford <aford173@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, adam.ford@...icpd.com,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2] ARM: dts: imx6q-logicpd: Shutdown LCD regulator
 during suspend

On Tue, Apr 02, 2019 at 02:25:46PM -0500, Adam Ford wrote:
> The LCD power sequencer is very finicky.  The backlight cannot
> be driven until after the sequencer is done.  Until now, the
> regulators were marked with 'regulator-always-on' to make sure
> it came up before the backlight.  This patch allows the LCD
> regulators to power down and prevent the backlight from being
> used again until the sequencer is ready.  This reduces
> standby power consumption by ~100mW.
> 
> Signed-off-by: Adam Ford <aford173@...il.com>

Applied, thanks.