| Message ID | 1441711176-4258-4-git-send-email-tomi.valkeinen@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Sep 08, 2015 at 02:19:36PM +0300, Tomi Valkeinen wrote: > Add DT binding for led-backlight. > > Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> > --- > .../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 -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 08/09/15 16:41, Andrew Lunn wrote: > On Tue, Sep 08, 2015 at 02:19:36PM +0300, Tomi Valkeinen wrote: >> Add DT binding for led-backlight. >> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> >> --- >> .../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. Yes, I think so. Especially in this case as this led-backlight device is not exactly a specific HW device, but more of a virtual device. Tomi
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 + +Optional properties: + - enable-gpios: contains a single GPIO specifier for the GPIO which enables + and disables the backlight (see GPIO binding[1]) + +[0]: Documentation/devicetree/bindings/leds/common.txt +[1]: Documentation/devicetree/bindings/gpio/gpio.txt + +Example: + + backlight { + compatible = "led-backlight"; + leds = <&backlight_led>; + + brightness-levels = <0 4 8 16 32 64 128 255>; + default-brightness-level = <6>; + + power-supply = <&vdd_bl_reg>; + enable-gpios = <&gpio 58 0>; + };
Add DT binding for led-backlight. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> --- .../bindings/video/backlight/led-backlight.txt | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 Documentation/devicetree/bindings/video/backlight/led-backlight.txt