From: linux@prisktech.co.nz (Tony Prisk)
To: linux-arm-kernel@lists.infradead.org
Subject: Devicetree node to turn off LCD when backlight is 'disabled'
Date: Mon, 11 Feb 2013 19:25:05 +1300 [thread overview]
Message-ID: <1360563905.4130.6.camel@gitbox> (raw)
I was just wondering if the following would be an acceptable way to turn
off an lcd backlight when the pwm-backlight driver is set to level 0.
The LCD backlight is 'powered' by the gpio.
leds {
compatible = "gpio-leds";
backlight {
label = "lcd-power";
gpios = <&gpio 0 0 0>; /* bank pin active_low */
linux,default-trigger = "backlight";
default-state = "on";
};
};
The method has been tested by an end-user and confirmed as working - I
just wanted to check whether it is the 'accepted' way of doing it.
Regards
Tony Prisk
WARNING: multiple messages have this Message-ID (diff)
From: Tony Prisk <linux@prisktech.co.nz>
To: Arm Kernel Mailing List <linux-arm-kernel@lists.infradead.org>,
Devicetree Mailing List <devicetree-discuss@lists.ozlabs.org>
Subject: Devicetree node to turn off LCD when backlight is 'disabled'
Date: Mon, 11 Feb 2013 19:25:05 +1300 [thread overview]
Message-ID: <1360563905.4130.6.camel@gitbox> (raw)
I was just wondering if the following would be an acceptable way to turn
off an lcd backlight when the pwm-backlight driver is set to level 0.
The LCD backlight is 'powered' by the gpio.
leds {
compatible = "gpio-leds";
backlight {
label = "lcd-power";
gpios = <&gpio 0 0 0>; /* bank pin active_low */
linux,default-trigger = "backlight";
default-state = "on";
};
};
The method has been tested by an end-user and confirmed as working - I
just wanted to check whether it is the 'accepted' way of doing it.
Regards
Tony Prisk
next reply other threads:[~2013-02-11 6:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-11 6:25 Tony Prisk [this message]
2013-02-11 6:25 ` Devicetree node to turn off LCD when backlight is 'disabled' Tony Prisk
2013-02-12 7:04 ` Thierry Reding
2013-02-12 7:04 ` Thierry Reding
2013-02-12 8:26 ` Tony Prisk
2013-02-12 8:26 ` Tony Prisk
2013-02-12 7:35 ` Alex Courbot
2013-02-12 7:35 ` Alex Courbot
2013-02-12 18:05 ` Grant Likely
2013-02-12 18:05 ` Grant Likely
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