linux-kernel - Re: [PATCH] arm64: dts: sun50i-pinephone: add led flash

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Date:   Wed, 29 Jul 2020 18:23:30 +0200
From:   Luca Weiss <luca@...tu.xyz>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     linux-arm-kernel@...ts.infradead.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: sun50i-pinephone: add led flash

Hi Maxime,

On Mittwoch, 29. Juli 2020 14:34:44 CEST Maxime Ripard wrote:
> Hi!
> 
> On Sat, Jul 25, 2020 at 01:08:12PM +0200, Luca Weiss wrote:
> > All revisions of the PinePhone have an SGM3140 LED flash. The gpios were
> > swapped on v1.0 of the board but this was fixed in later revisions.
> > 
> > Signed-off-by: Luca Weiss <luca@...tu.xyz>
> > ---
> > 
> >  .../boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts   |  5 +++++
> >  .../boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts   |  5 +++++
> >  .../boot/dts/allwinner/sun50i-a64-pinephone-1.2.dts   |  5 +++++
> >  .../boot/dts/allwinner/sun50i-a64-pinephone.dtsi      | 11 +++++++++++
> >  4 files changed, 26 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts
> > b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts index
> > 0c42272106afa..b579b03d4e026 100644
> > --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts
> > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.0.dts
> > @@ -9,3 +9,8 @@ / {
> > 
> >  	model = "Pine64 PinePhone Developer Batch (1.0)";
> >  	compatible = "pine64,pinephone-1.0", "allwinner,sun50i-a64";
> >  
> >  };
> > 
> > +
> > +&sgm3140 {
> > +	flash-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
> > +	enable-gpios = <&pio 2 3 GPIO_ACTIVE_HIGH>; /* PC3 */
> > +};
> > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts
> > b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts index
> > 3e99a87e9ce52..8552587aac248 100644
> > --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts
> > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.1.dts
> > @@ -28,3 +28,8 @@ &backlight {
> > 
> >  	num-interpolated-steps = <50>;
> >  	default-brightness-level = <400>;
> >  
> >  };
> > 
> > +
> > +&sgm3140 {
> > +	flash-gpios = <&pio 2 3 GPIO_ACTIVE_HIGH>; /* PC3 */
> > +	enable-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
> > +};
> > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.2.dts
> > b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.2.dts index
> > a9f5b670c9b82..ec77715ba4a2a 100644
> > --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.2.dts
> > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.2.dts
> > @@ -38,3 +38,8 @@ &lis3mdl {
> > 
> >  	interrupt-parent = <&pio>;
> >  	interrupts = <1 1 IRQ_TYPE_EDGE_RISING>; /* PB1 */
> >  
> >  };
> > 
> > +
> > +&sgm3140 {
> > +	flash-gpios = <&pio 2 3 GPIO_ACTIVE_HIGH>; /* PC3 */
> > +	enable-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
> > +};
> > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> > b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi index
> > 25150aba749dc..e0bc1bcc1c1f3 100644
> > --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> > @@ -60,6 +60,17 @@ vibrator {
> > 
> >  		enable-gpios = <&pio 3 2 GPIO_ACTIVE_HIGH>; /* PD2 */
> >  		vcc-supply = <&reg_dcdc1>;
> >  	
> >  	};
> > 
> > +
> > +	sgm3140: led-controller {
> 
> The nodes should be ordered by node-name here

Will update the patch, forgot about that.

> > +		compatible = "sgmicro,sgm3140";
> > +		vin-supply = <&reg_dcdc1>;
> > +
> > +		sgm3140_flash: led {
> 
> What do you need the label for?

The label will be used for connecting the flash to the rear camera (which 
hasn't been upstreamed yet) using:

    flash-leds = <&sgm3140_flash>;

Hope that clears it up.

> 
> Thanks!
> Maxime

Regards
Luca