linux-kernel - Re: [PATCH v3 1/2] dt-bindings: i2c: stm32f7: add st,smbus-alert binding for SMBus Alert

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Date:   Wed, 5 May 2021 11:49:16 +0200
From:   Alain Volmat <alain.volmat@...s.st.com>
To:     Wolfram Sang <wsa@...nel.org>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <pierre-yves.mordret@...s.st.com>,
        <mcoquelin.stm32@...il.com>, <alexandre.torgue@...s.st.com>,
        <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <fabrice.gasnier@...s.st.com>
Subject: Re: [PATCH v3 1/2] dt-bindings: i2c: stm32f7: add st,smbus-alert
 binding for SMBus Alert

Hi Wolfram,

On Tue, May 04, 2021 at 09:53:48PM +0200, Wolfram Sang wrote:
> 
> > +        st,smbus-alert:
> 
> After reading the specs again, I think we can make this a generic
> binding. SMBusAlert is optional. So, we can say it is not covered by the
> "smbus" binding and needs a seperate one. Makes sense?

Indeed, SMBus Spec [1] mentions about SMBALERT#:
An optional signal that a slave device can use to notify the system
master that it has information for the master

Hence it does make sense to separate it from the smbus binding. I will
post a v4 of this serie with the addition of a generic binding 'smbus-alert'.

Alain

[1] http://www.smbus.org/specs/SMBus_3_1_20180319.pdf