From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Lunn Date: Tue, 08 Sep 2015 13:41:40 +0000 Subject: Re: [PATCHv2 3/3] devicetree: Add led-backlight binding Message-Id: <20150908134140.GH30736@lunn.ch> List-Id: References: <1441711176-4258-1-git-send-email-tomi.valkeinen@ti.com> <1441711176-4258-4-git-send-email-tomi.valkeinen@ti.com> In-Reply-To: <1441711176-4258-4-git-send-email-tomi.valkeinen@ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Tomi Valkeinen Cc: Jacek Anaszewski , Jingoo Han , Lee Jones , linux-leds@vger.kernel.org, linux-fbdev@vger.kernel.org On Tue, Sep 08, 2015 at 02:19:36PM +0300, Tomi Valkeinen wrote: > Add DT binding for led-backlight. > > Signed-off-by: Tomi Valkeinen > --- > .../bindings/video/backlight/led-backlight.txt | 30 ++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > create mode 100644 Documentation/devicetree/bindings/video/backlight/led-backlight.txt > > diff --git a/Documentation/devicetree/bindings/video/backlight/led-backlight.txt b/Documentation/devicetree/bindings/video/backlight/led-backlight.txt > new file mode 100644 > index 000000000000..fb77051ac230 > --- /dev/null > +++ b/Documentation/devicetree/bindings/video/backlight/led-backlight.txt > @@ -0,0 +1,30 @@ > +led-backlight bindings > + > +Required properties: > + - compatible: "led-backlight" > + - leds: phandle to a led OF node [0] > + - brightness-levels: Array of distinct LED brightness levels. These > + are in the range from 0 to 255, passed to the LED class driver. > + - default-brightness-level: the default brightness level (index into the > + array defined by the "brightness-levels" property) > + - power-supply: regulator for supply voltage Hi Tomi Maybe this regulator should be optional? I could imagine blacklights without one, in none power sensitive cases, e.g. industrial PC with a touch screen display, train ticket machine, etc. Andrew