linux-kernel - Re: [PATCH v2 1/4] dt-bindings: soundwire: add slave bindings

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Date:   Fri, 9 Aug 2019 10:24:59 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Mark Brown <broonie@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        bgoswami@...eaurora.org, plai@...eaurora.org, robh+dt@...nel.org,
        devicetree@...r.kernel.org, lgirdwood@...il.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] dt-bindings: soundwire: add slave bindings

On 08-08-19, 20:52, Mark Brown wrote:
> On Thu, Aug 08, 2019 at 05:48:56PM +0100, Srinivas Kandagatla wrote:
> > On 08/08/2019 16:58, Pierre-Louis Bossart wrote:
> 
> > > > +- sdw-instance-id: Should be ('Instance ID') from SoundWire
> > > > +          Enumeration Address. Instance ID is for the cases
> > > > +          where multiple Devices of the same type or Class
> > > > +          are attached to the bus.
> 
> > > so it is actually required if you have a single Slave device? Or is it
> > > only required when you have more than 1 device of the same type?
> 
> > This is mandatory for any slave device!
> 
> If it's mandatory the wording is a bit unclear.  How about something
> like:
> 
> 	Should be ('Instance ID') from the SoundWire Enumeration
> 	Address.  This must always be provided, if multiple devices
> 	with the same type or class or attached to the bus each
> 	instance must have a distinct value.

That helps to make it clear.

Also the section of properties starts with Mandatory property, it should
be made Mandatory Properties instead, like in other binding docs to make
it clear that properties mentioned in the section are mandatory

-- 
~Vinod