[PATCH] arm64: dts: qcom: sc7280: Enable keyboard backlight for villager

[PATCH] arm64: dts: qcom: sc7280: Enable keyboard backlight for villager

[Matthias Kaehlcke]

Villager has a backlit keyboard, enable support for the backlight.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
---

 arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts | 8 ++++++++
 arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi            | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
index d3d6ffad4eff..b6a6a1454883 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
+++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
@@ -58,6 +58,10 @@ &ap_sar_sensor1 {
 	status = "okay";
 };
 
+&keyboard_backlight {
+	status = "okay";
+};
+
 &mdss_edp {
 	status = "okay";
 };
@@ -76,6 +80,10 @@ &pcie1_phy {
 	status = "okay";
 };
 
+&pwmleds {
+	status = "okay";
+};
+
 /* For eMMC */
 &sdhc_1 {
 	status = "okay";
diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
index 9cb1bc8ed6b5..4b8bdcd6d9f4 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi
@@ -295,7 +295,7 @@ pp1200_wf_cam: pp1200-wf-cam-regulator {
 
 	/* BOARD-SPECIFIC TOP LEVEL NODES */
 
-	pwmleds {
+	pwmleds: pwmleds {
 		compatible = "pwm-leds";
 		status = "disabled";
 		keyboard_backlight: keyboard-backlight {
-- 
2.36.1.124.g0e6072fb45-goog

Re: [PATCH] arm64: dts: qcom: sc7280: Enable keyboard backlight for villager

[Doug Anderson]

Hi,

On Fri, May 20, 2022 at 12:48 PM Matthias Kaehlcke <mka@chromium.org> wrote:
>
> Villager has a backlit keyboard, enable support for the backlight.
>
> Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> ---
>
>  arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts | 8 ++++++++
>  arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi            | 2 +-
>  2 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> index d3d6ffad4eff..b6a6a1454883 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> @@ -58,6 +58,10 @@ &ap_sar_sensor1 {
>         status = "okay";
>  };
>
> +&keyboard_backlight {
> +       status = "okay";
> +};

Instead of doing this, can you just get rid of the status = "disabled"
in herobrine.dtsi? I don't think there's any benefit to having two
levels of "disabled" in the herobrine device tree.

Re: [PATCH] arm64: dts: qcom: sc7280: Enable keyboard backlight for villager

[Matthias Kaehlcke]

On Fri, May 20, 2022 at 12:57:50PM -0700, Doug Anderson wrote:
> Hi,
> 
> On Fri, May 20, 2022 at 12:48 PM Matthias Kaehlcke <mka@chromium.org> wrote:
> >
> > Villager has a backlit keyboard, enable support for the backlight.
> >
> > Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> > ---
> >
> >  arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts | 8 ++++++++
> >  arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi            | 2 +-
> >  2 files changed, 9 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> > index d3d6ffad4eff..b6a6a1454883 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> > +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> > @@ -58,6 +58,10 @@ &ap_sar_sensor1 {
> >         status = "okay";
> >  };
> >
> > +&keyboard_backlight {
> > +       status = "okay";
> > +};
> 
> Instead of doing this, can you just get rid of the status = "disabled"
> in herobrine.dtsi? I don't think there's any benefit to having two
> levels of "disabled" in the herobrine device tree.

Sure.

I guess the 'disabled' status was put as a micro-optimization to avoid
probing the 'pwm-leds' driver on boards that don't have any such LEDs. In
practical terms it shouldn't really make a difference in terms of memory
or CPU.

Re: [PATCH] arm64: dts: qcom: sc7280: Enable keyboard backlight for villager

[Doug Anderson]

Hi,

On Fri, May 20, 2022 at 1:29 PM Matthias Kaehlcke <mka@chromium.org> wrote:
>
> On Fri, May 20, 2022 at 12:57:50PM -0700, Doug Anderson wrote:
> > Hi,
> >
> > On Fri, May 20, 2022 at 12:48 PM Matthias Kaehlcke <mka@chromium.org> wrote:
> > >
> > > Villager has a backlit keyboard, enable support for the backlight.
> > >
> > > Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> > > ---
> > >
> > >  arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts | 8 ++++++++
> > >  arch/arm64/boot/dts/qcom/sc7280-herobrine.dtsi            | 2 +-
> > >  2 files changed, 9 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> > > index d3d6ffad4eff..b6a6a1454883 100644
> > > --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> > > +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r0.dts
> > > @@ -58,6 +58,10 @@ &ap_sar_sensor1 {
> > >         status = "okay";
> > >  };
> > >
> > > +&keyboard_backlight {
> > > +       status = "okay";
> > > +};
> >
> > Instead of doing this, can you just get rid of the status = "disabled"
> > in herobrine.dtsi? I don't think there's any benefit to having two
> > levels of "disabled" in the herobrine device tree.
>
> Sure.
>
> I guess the 'disabled' status was put as a micro-optimization to avoid
> probing the 'pwm-leds' driver on boards that don't have any such LEDs. In
> practical terms it shouldn't really make a difference in terms of memory
> or CPU.

Just to be clear, I was suggesting leaving the "disabled" at the
pwm-leds level but removing the one at the "keyboard_backlight" level.
I don't expect us to have any pwm_leds on herobrine devices that
aren't for the keyboard backlight. If/when we do we can always add the
two-levels of disabled back in...

-Doug