Hi, since backlight will only come in 3.9, I can add some remarks myself, so I don't forget them next time.
On Saturday 17 November 2012 00:20:32 Marc Dietrich wrote: > This enables backlight using power sequences. > > Signed-off-by: Marc Dietrich <[email protected]> > --- > arch/arm/boot/dts/tegra20-paz00.dts | 72 > +++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) > > diff --git a/arch/arm/boot/dts/tegra20-paz00.dts > b/arch/arm/boot/dts/tegra20-paz00.dts index 8a14e1d..7349aa3 100644 > --- a/arch/arm/boot/dts/tegra20-paz00.dts > +++ b/arch/arm/boot/dts/tegra20-paz00.dts > @@ -15,6 +15,10 @@ > rgb { > status = "okay"; > nvidia,ddc-i2c-bus = <&lvds_ddc>; > + > + display { > + nvidia,backlight = <&backlight>; > + }; > }; > }; > }; > @@ -461,6 +465,74 @@ > }; > }; > > + backlight: backlight { > + compatible = "pwm-backlight"; > + brightness-levels = <0 16 32 48 64 80 96 112 128 144 160 176 > 192 208 224 > 240 255>; + default-brightness-level = <12>; > + > + /* resources used by the power sequences */ > + pwms = <&pwm 0 5000000>; > + pwm-names = "backlight"; > + > + power-sequences { > + power-on { > + step0 { > + type = "pwm"; > + id = "backlight"; > + enable; > + }; > + step1 { > + type = "gpio"; > + gpio = <&gpio 4 0>; /* gpio PA4, > en_vdd_pnl */ > + value = <1>; > + }; > + step2 { > + type = "gpio"; > + gpio = <&gpio 176 0>; /* gpio PW0, > bl_vdd */ this one needs to be removed as it is not used. There is bl_pwm (gpio U3) however which I cannot sort in here. > + value = <1>; > + }; > + step3 { > + type = "gpio"; > + gpio = <&gpio 102 0>; /* gpio PM6, > lvds_shdn */ > + value = <1>; > + }; > + step4 { > + type = "gpio"; > + gpio = <&gpio 164 0>; /* gpio PU4, > bl_enb */ > + value = <1>; > + }; > + }; > + > + power-off { > + step4 { > + type = "gpio"; > + gpio = <&gpio 164 0>; /* gpio PU4, > bl_enb */ > + value = <0>; and this is totally bogus. /me notes: better do not send patches after midnight! Marc -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
