[PATCH] arm64: dts: salvator-common: add 12V regulator to backlight

[PATCH] arm64: dts: salvator-common: add 12V regulator to backlight

[Ulrich Hecht]

This fixes the warning "pwm-backlight backlight: backlight supply power
not found, using dummy regulator".

Fixes: b33be33670217533 ("arm64: dts: salvator-x: Add panel backlight support")
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
---
 arch/arm64/boot/dts/renesas/salvator-common.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
index e3d8310..fa2a1f7 100644
--- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
@@ -63,6 +63,7 @@
 		brightness-levels = <256 128 64 16 8 4 0>;
 		default-brightness-level = <6>;
 
+		power-supply = <&reg_12v>;
 		enable-gpios = <&gpio6 7 GPIO_ACTIVE_HIGH>;
 	};
 
@@ -107,6 +108,15 @@
 		regulator-always-on;
 	};
 
+	reg_12v: regulator2 {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-12V";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
 	rsnd_ak4613: sound {
 		compatible = "simple-audio-card";
 
-- 
2.7.4

Re: [PATCH] arm64: dts: salvator-common: add 12V regulator to backlight

[Laurent Pinchart]

Hi Ulrich,

Thank you for the patch.

On Monday, 18 September 2017 18:56:14 EEST Ulrich Hecht wrote:
> This fixes the warning "pwm-backlight backlight: backlight supply power
> not found, using dummy regulator".
> 
> Fixes: b33be33670217533 ("arm64: dts: salvator-x: Add panel backlight
> support")
> Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
> ---
>  arch/arm64/boot/dts/renesas/salvator-common.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
> b/arch/arm64/boot/dts/renesas/salvator-common.dtsi index e3d8310..fa2a1f7
> 100644
> --- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
> +++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
> @@ -63,6 +63,7 @@
>  		brightness-levels = <256 128 64 16 8 4 0>;
>  		default-brightness-level = <6>;
> 
> +		power-supply = <&reg_12v>;
>  		enable-gpios = <&gpio6 7 GPIO_ACTIVE_HIGH>;
>  	};
> 
> @@ -107,6 +108,15 @@
>  		regulator-always-on;
>  	};
> 
> +	reg_12v: regulator2 {

Nitpicking, should be call this reg_12p0v to match the naming scheme of the 
other fixed regulators ?

Apart from that, and regardless of whether you want to change the name or not,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +		compatible = "regulator-fixed";
> +		regulator-name = "fixed-12V";
> +		regulator-min-microvolt = <12000000>;
> +		regulator-max-microvolt = <12000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> +
>  	rsnd_ak4613: sound {
>  		compatible = "simple-audio-card";


-- 
Regards,

Laurent Pinchart

Re: [PATCH] arm64: dts: salvator-common: add 12V regulator to backlight

[Geert Uytterhoeven]

On Mon, Sep 18, 2017 at 5:56 PM, Ulrich Hecht
<ulrich.hecht+renesas@gmail.com> wrote:
> This fixes the warning "pwm-backlight backlight: backlight supply power
> not found, using dummy regulator".
>
> Fixes: b33be33670217533 ("arm64: dts: salvator-x: Add panel backlight support")
> Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH] arm64: dts: salvator-common: add 12V regulator to backlight

[Simon Horman]

On Wed, Sep 20, 2017 at 01:55:09PM +0200, Geert Uytterhoeven wrote:
> On Mon, Sep 18, 2017 at 5:56 PM, Ulrich Hecht
> <ulrich.hecht+renesas@gmail.com> wrote:
> > This fixes the warning "pwm-backlight backlight: backlight supply power
> > not found, using dummy regulator".
> >
> > Fixes: b33be33670217533 ("arm64: dts: salvator-x: Add panel backlight support")
> > Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
> > Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
> 
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Thanks, applied as a fix for v4.14.