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Message-ID: <CAJiuCccf3=McRfJ85SiudDHZ4nDOT+d7hh+nKDgC1u6nTpphPQ@mail.gmail.com>
Date: Mon, 4 Nov 2019 18:49:00 +0100
From: Clément Péron <peron.clem@...il.com>
To: Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>
Cc: Thierry Reding <thierry.reding@...il.com>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Maxime Ripard <mripard@...nel.org>,
Chen-Yu Tsai <wens@...e.org>, linux-pwm@...r.kernel.org,
devicetree <devicetree@...r.kernel.org>,
linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
Jernej Skrabec <jernej.skrabec@...l.net>,
Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH v2 1/7] dt-bindings: pwm: allwinner: Add H6 PWM description
On Mon, 4 Nov 2019 at 09:04, Uwe Kleine-König
<u.kleine-koenig@...gutronix.de> wrote:
>
> On Sun, Nov 03, 2019 at 09:33:28PM +0100, Clément Péron wrote:
> > From: Jernej Skrabec <jernej.skrabec@...l.net>
> >
> > H6 PWM block is basically the same as A20 PWM, except that it also has
> > bus clock and reset line which needs to be handled accordingly.
> >
> > Expand Allwinner PWM binding with H6 PWM specifics.
> >
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
> > Signed-off-by: Clément Péron <peron.clem@...il.com>
> > ---
> > .../bindings/pwm/allwinner,sun4i-a10-pwm.yaml | 45 ++++++++++++++++++-
> > 1 file changed, 44 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/pwm/allwinner,sun4i-a10-pwm.yaml b/Documentation/devicetree/bindings/pwm/allwinner,sun4i-a10-pwm.yaml
> > index 0ac52f83a58c..bf36ea509f31 100644
> > --- a/Documentation/devicetree/bindings/pwm/allwinner,sun4i-a10-pwm.yaml
> > +++ b/Documentation/devicetree/bindings/pwm/allwinner,sun4i-a10-pwm.yaml
> > @@ -30,13 +30,46 @@ properties:
> > - items:
> > - const: allwinner,sun50i-h5-pwm
> > - const: allwinner,sun5i-a13-pwm
> > + - const: allwinner,sun50i-h6-pwm
> >
> > reg:
> > maxItems: 1
> >
> > - clocks:
> > + # Even though it only applies to subschemas under the conditionals,
> > + # not listing them here will trigger a warning because of the
> > + # additionalsProperties set to false.
> > + clocks: true
> > + clock-names: true
> > + resets:
> > maxItems: 1
> >
> > + if:
> > + properties:
> > + compatible:
> > + contains:
> > + const: allwinner,sun50i-h6-pwm
> > +
> > + then:
> > + properties:
> > + clocks:
> > + items:
> > + - description: Module Clock
> > + - description: Bus Clock
> > +
> > + clock-names:
> > + items:
> > + - const: mod
> > + - const: bus
> > +
> > + required:
> > + - clock-names
> > + - resets
> > +
> > + else:
> > + properties:
> > + clocks:
> > + maxItems: 1
> > +
>
> I guess this hunk says "If this is a allwinner,sun50i-h6-pwm, a mod and
> bus clock is required.", right?
Correct.
>
>
> I wonder if it is sensible to require a clock-names property in the else
> branch, too. This would make it obvious if the clock there corresponds
> to the "mod" or the "bus" clock on H6. (I guess it's "mod".)
This will also require to change example and all the current allwinner
device-tree that have a PWM declared.
Regards,
Clément
>
> Best regards
> Uwe
>
> --
> Pengutronix e.K. | Uwe Kleine-König |
> Industrial Linux Solutions | http://www.pengutronix.de/ |
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