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From: "Xuyang Dong" <dongxuyang@eswincomputing.com>
To: "Philipp Zabel" <p.zabel@pengutronix.de>,
	ukleinek@kernel.org, robh@kernel.org, krzk+dt@kernel.org,
	conor+dt@kernel.org, ben-linux@fluff.org,
	ben.dooks@codethink.co.uk, linux-pwm@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	daniel.lezcano@kernel.org, tglx@kernel.org
Cc: ningyu@eswincomputing.com, linmin@eswincomputing.com,
	xuxiang@eswincomputing.com, wangguosheng@eswincomputing.com,
	pinkesh.vaghela@einfochips.com,
	"Conor Dooley" <conor.dooley@microchip.com>
Subject: Re: Re: [PATCH v12 1/4] dt-bindings: pwm: dwc: Document optional resets property
Date: Wed, 22 Jul 2026 15:41:12 +0800 (GMT+08:00)	[thread overview]
Message-ID: <74db8e52.8900.19f88c57dd0.Coremail.dongxuyang@eswincomputing.com> (raw)
In-Reply-To: <08d7d89c6b373365555571d29a97b132aeb4fc0a.camel@pengutronix.de>

> 
> On Di, 2026-07-21 at 20:08 +0800, dongxuyang@eswincomputing.com wrote:
> > From: Xuyang Dong <dongxuyang@eswincomputing.com>
> > 
> > The DesignWare PWM IP has two active-low reset inputs: presetn resets
> > the register interface logic in the pclk (bus) domain, and
> > timer_N_resetn resets the counter/timer logic in the timer_N_clk
> > domain. The existing snps,dw-apb-timers-pwm2 binding does not
> > describe either of these lines.
> > 
> > Add the resets property and describe the function of each reset to
> > support future use of resets.
> > 
> > Acked-by: Conor Dooley <conor.dooley@microchip.com>
> > Signed-off-by: Xuyang Dong <dongxuyang@eswincomputing.com>
> > ---
> >  .../devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml     | 5 +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml b/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml
> > index 7523a89a1773..213fdaef25d9 100644
> > --- a/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml
> > +++ b/Documentation/devicetree/bindings/pwm/snps,dw-apb-timers-pwm2.yaml
> > @@ -43,6 +43,11 @@ properties:
> >        - const: bus
> >        - const: timer
> >  
> > +  resets:
> > +    items:
> > +      - description: Interface bus (presetn) reset
> > +      - description: PWM timer logic (timer_N_resetn) reset
> > +
> 
> I suggest adding a reset-names property. Without that the descriptions
> are useless, as driver code will not be able to control the resets
> individually.
> 

Hi Philipp,

We will add a reset-names property as follows:
  reset-names:
    items:
      - const: bus
      - const: timer

Is this acceptable in your opinion?

Best regards,
Xuyang Dong


  reply	other threads:[~2026-07-22  7:41 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-21 12:07 [PATCH v12 0/4] Update designware pwm driver Xuyang Dong
2026-07-21 12:08 ` [PATCH v12 1/4] dt-bindings: pwm: dwc: Document optional resets property dongxuyang
2026-07-21 12:50   ` Philipp Zabel
2026-07-22  7:41     ` Xuyang Dong [this message]
2026-07-21 12:08 ` [PATCH v12 2/4] dt-bindings: pwm: dwc: Add eswin compatible dongxuyang
2026-07-21 12:52   ` Philipp Zabel
2026-07-22  7:41     ` Xuyang Dong
2026-07-21 12:09 ` [PATCH v12 3/4] pwm: dwc: add of/platform support dongxuyang
2026-07-21 13:10   ` Philipp Zabel
2026-07-22  7:41     ` Xuyang Dong
2026-07-21 12:09 ` [PATCH v12 4/4] dt-bindings: timer: dwc: Update resets property items dongxuyang
2026-07-21 12:21   ` sashiko-bot

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