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Message-ID: <ba51ecefb814115e977d90062ca5fe99859cb327.camel@gmail.com>
Date: Tue, 14 Feb 2023 15:26:14 +0100
From: Alexander Sverdlin <alexander.sverdlin@...il.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
devicetree@...r.kernel.org
Cc: Hartley Sweeten <hsweeten@...ionengravers.com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: sound: ep93xx: Add I2S and AC'97
descriptions
Hello Krzysztof!
On Tue, 2023-02-14 at 15:11 +0100, Krzysztof Kozlowski wrote:
> > > > + interrupts:
> > > > + maxItems: 1
> > > > +
> > > > + clocks:
> > > > + minItems: 3
> > >
> > > maxItems instead
> >
> > reg and clocks are required, I suppose I should include both minItems
> > and maxItems for both of them?
>
> No. minItems is implied.
I see. But I think minItems "3" should be included for clocks, right?
> >
> > > > +
> > > > + clock-names:
> > > > + items:
> > > > + - const: mclk
> > > > + - const: sclk
> > > > + - const: lrclk
> > >
> > >
> > > The clk suffixes are quite redundant. Don't these inputs have some
> > > meaningful name?
> >
> > They are actually meaningful, as they are usually named in I2S, please
> > refer to the EP93xx User's Guide:
> > https://cdn.embeddedts.com/resource-attachments/ts-7000_ep9301-ug.pdf
> > page 71, for instance.
>
> OK, but then I like the example - if datasheet would use name
> "clk_clk_this_is_clk" would you still find it meaningful?
>
> Every clock input in clocks is a clock. There is usually no need to say
> that a clock is a clock...
I see you point, but this is legacy code (sound/soc/cirrus/ep93xx-i2s.c)
which took these names back in platform data times... I also see that
rather majority of *i2s*.yaml use something "*clk", so maybe it could
be accepted for legacy code?
--
Alexander Sverdlin.
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