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Date:   Wed, 25 Oct 2023 17:32:21 +0800
From:   Nylon Chen <nylon.chen@...ive.com>
To:     Conor Dooley <conor@...nel.org>
Cc:     linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, thierry.reding@...il.com,
        u.kleine-koenig@...gutronix.de, emil.renner.berthing@...onical.com,
        vincent.chen@...ive.com, greentime.hu@...ive.com,
        zong.li@...ive.com, nylon7717@...il.com
Subject: Re: [v5 1/2] riscv: dts: sifive: unleashed/unmatched: Remove PWM
 controlled LED's active-low properties

Hi Conor,

Conor Dooley <conor@...nel.org> 於 2023年10月24日 週二 下午10:55寫道:
>
> Hey,
>
> On Tue, Oct 24, 2023 at 06:19:01PM +0800, Nylon Chen wrote:
> > This removes the active-low properties of the PWM-controlled LEDs in
> > the HiFive Unmatched device tree.
> >
> > The reference is hifive-unleashed-a00.pdf[0] and hifive-unmatched-schematics-v3.pdf[1].
> >
> > Link: https://sifive.cdn.prismic.io/sifive/c52a8e32-05ce-4aaf-95c8-7bf8453f8698_hifive-unleashed-a00-schematics-1.pdf [0]
> > Link: https://sifive.cdn.prismic.io/sifive/6a06d6c0-6e66-49b5-8e9e-e68ce76f4192_hifive-unmatched-schematics-v3.pdf [1]
>
> >
>
> This blank line should be removed if there is a follow-up.
thanks, I got it.
>
> > Signed-off-by: Vincent Chen <vincent.chen@...ive.com>
>
> What did Vincent contribute to this patch? Are you missing a
> co-developed-by tag, perhaps?
Yes, Vincent was the first person to find the PWM driver problem, and
Zong Li helped me with the relevant review internally.

so in the next version, I will add the correct tags for these two developers.

Thank you again for your time.
>
> > Signed-off-by: Nylon Chen <nylon.chen@...ive.com>
>
> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> Acked-by: Conor Dooley <conor.dooley@...rochip.com>
>
> I expect this to go via the pwm tree since this is going to "break" (in
> the loosest possible sense) existing systems if merged separately.
>
> Cheers,
> Conor.
>
> > ---
> >  arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts |  8 ++++----
> >  arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 12 ++++--------
> >  2 files changed, 8 insertions(+), 12 deletions(-)
> >
> > diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> > index 900a50526d77..11e7ac1c54bb 100644
> > --- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> > +++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> > @@ -49,7 +49,7 @@ led-controller {
> >               compatible = "pwm-leds";
> >
> >               led-d1 {
> > -                     pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>;
> > +                     pwms = <&pwm0 0 7812500 0>;
> >                       active-low;
> >                       color = <LED_COLOR_ID_GREEN>;
> >                       max-brightness = <255>;
> > @@ -57,7 +57,7 @@ led-d1 {
> >               };
> >
> >               led-d2 {
> > -                     pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>;
> > +                     pwms = <&pwm0 1 7812500 0>;
> >                       active-low;
> >                       color = <LED_COLOR_ID_GREEN>;
> >                       max-brightness = <255>;
> > @@ -65,7 +65,7 @@ led-d2 {
> >               };
> >
> >               led-d3 {
> > -                     pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>;
> > +                     pwms = <&pwm0 2 7812500 0>;
> >                       active-low;
> >                       color = <LED_COLOR_ID_GREEN>;
> >                       max-brightness = <255>;
> > @@ -73,7 +73,7 @@ led-d3 {
> >               };
> >
> >               led-d4 {
> > -                     pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>;
> > +                     pwms = <&pwm0 3 7812500 0>;
> >                       active-low;
> >                       color = <LED_COLOR_ID_GREEN>;
> >                       max-brightness = <255>;
> > diff --git a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
> > index 07387f9c135c..b328ee80693f 100644
> > --- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
> > +++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
> > @@ -51,8 +51,7 @@ led-controller-1 {
> >               compatible = "pwm-leds";
> >
> >               led-d12 {
> > -                     pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>;
> > -                     active-low;
> > +                     pwms = <&pwm0 0 7812500 0>;
> >                       color = <LED_COLOR_ID_GREEN>;
> >                       max-brightness = <255>;
> >                       label = "d12";
> > @@ -68,20 +67,17 @@ multi-led {
> >                       label = "d2";
> >
> >                       led-red {
> > -                             pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>;
> > -                             active-low;
> > +                             pwms = <&pwm0 2 7812500 0>;
> >                               color = <LED_COLOR_ID_RED>;
> >                       };
> >
> >                       led-green {
> > -                             pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>;
> > -                             active-low;
> > +                             pwms = <&pwm0 1 7812500 0>;
> >                               color = <LED_COLOR_ID_GREEN>;
> >                       };
> >
> >                       led-blue {
> > -                             pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>;
> > -                             active-low;
> > +                             pwms = <&pwm0 3 7812500 0>;
> >                               color = <LED_COLOR_ID_BLUE>;
> >                       };
> >               };
> > --
> > 2.42.0
> >

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