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Date: Wed, 17 Jan 2024 14:37:30 +0800
From: Nylon Chen <nylon.chen@...ive.com>
To: Conor Dooley <conor.dooley@...rochip.com>
Cc: Emil Renner Berthing <emil.renner.berthing@...onical.com>, paul.walmsley@...ive.com,
palmer@...belt.com, conor+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
robh+dt@...nel.org, u.kleine-koenig@...gutronix.de, thierry.reding@...il.com,
aou@...s.berkeley.edu, zong.li@...ve.com, vincent.chen@...ive.com,
linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
nylon7717@...il.com
Subject: Re: [v6 1/3] riscv: dts: sifive: unleashed/unmatched: Remove PWM
controlled LED's active-low properties
Conor Dooley <conor.dooley@...rochip.com> 於 2024年1月16日 週二 下午6:45寫道：
>
> On Tue, Jan 16, 2024 at 02:20:57AM -0800, Emil Renner Berthing wrote:
> > 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]
> > >
> > > Acked-by: Conor Dooley <conor.dooley@...rochip.com>
> > > Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
> > > Co-developed-by: Zong Li <zong.li@...ve.com>
> > > Signed-off-by: Zong Li <zong.li@...ve.com>
> > > Co-developed-by: Vincent Chen <vincent.chen@...ive.com>
> > > Signed-off-by: Vincent Chen <vincent.chen@...ive.com>
> > > Signed-off-by: Nylon Chen <nylon.chen@...ive.com>
> > > ---
> > > 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>;
> >
Hi Emil and Conor, thanks for your feedback.
>
>
> > Here you remove the active-low property, but you don't above. I'm not sure
> > what's the right thing to do, but I would have expected the same change in both
> > places.
>
For this patch, all "active-low" should be deleted. This is my
mistake. I will fix it in the next version.
>
>
> Just to note, the original version of this that I acked/reviewed removed
> the property from all led nodes. I then apparently didn't look closely
> enough at v5 and left acked/reviewed tags on it too. It did not remove
> the active-low properties but this change was not mentioned in the
> changelog for the series.
Sorry Conor, I apologize for any confusion I may have caused.
>
> D4 on the unleashed and D12 on the unmatched have the same circuitry
> (modulo the placement of the series resistor) so I don't get why the
> property is being removed from only D12.
>
> I rescind my ack/review until that is clarified and/or fixed.
>
> Thanks,
> Conor.
>
>
> > > 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
> > >
> > >
> > > _______________________________________________
> > > linux-riscv mailing list
> > > linux-riscv@...ts.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-riscv
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