linux-kernel - Re: [PATCH] ARM: dts: at91: nattis: initialize the BLON pin as output-low early

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Message-ID: <20181121112521.GL8367@piout.net>
Date:   Wed, 21 Nov 2018 12:25:21 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Peter Rosin <peda@...ntia.se>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: at91: nattis: initialize the BLON pin as
 output-low early

On 20/11/2018 21:20:43+0000, Peter Rosin wrote:
> The pwm-backlight driver initializes BLON (the enable gpio) to
> output-high if the gpio is input on probe. Initializing the gpio
> to output-low before the driver probes prevents this action by
> the pwm-backlight driver and gets rid of a nasty blink of full
> backlight with an uninitialized panel.
> 
> Signed-off-by: Peter Rosin <peda@...ntia.se>
> ---
>  arch/arm/boot/dts/at91-nattis-2-natte-2.dts | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
Applied, thanks.

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com