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Date:   Tue, 25 Jun 2019 11:55:33 +0200
From:   Wolfram Sang <wsa@the-dreams.de>
To:     Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc:     Eugen.Hristev@microchip.com, peda@axentia.se, robh+dt@kernel.org,
        mark.rutland@arm.com, Nicolas.Ferre@microchip.com,
        Ludovic.Desroches@microchip.com, linux-i2c@vger.kernel.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
        Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Subject: I2C filtering (was Re: [PATCH v2 6/9] dt-bindings: i2c: at91: add
 binding for enable-ana-filt)
Message-ID: <20190625095533.GC1688@kunai>
References: <1561449642-26956-1-git-send-email-eugen.hristev@microchip.com>
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 <4e81d3c9-25f3-ca6e-f2d5-17fad5905bb8@axentia.se>
 <84628b5e-bea7-7d91-f790-f3a2650040fa@microchip.com>
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On Tue, Jun 25, 2019 at 11:31:56AM +0200, Alexandre Belloni wrote:
> On 25/06/2019 09:14:13+0000, Eugen.Hristev@microchip.com wrote:
> > > Perhaps
> > >=20
> > > 	microchip,digital-filter;
> > > 	microchip,analog-filter;
> > >=20
> > > ?
> >=20
> > Hi Peter,
> >=20
> > Thanks for reviewing. The name of the property does not matter much to=
=20
> > me, and we have properties prefixed with vendor, and some are not.
> >=20
> > @Alexandre Belloni: which name you think it's best ?
> >=20
>=20
> I'm not sure, it depends on whether Wolfram thinks it is generic enough
> to be used without a vendor prefix.

I could imagine that we design a generic property for filters. The ones
above make me wonder, though, because they are bool. I'd think you can
configure the filters in some way, too?

I never used such filtering, so I am unaware of the parameters needed /
suitable. Quick grepping through I2C master drivers reveals that
i2c-stm32f7.c also handles filters, but only with default values. Maybe
DT configuration would be benefitial to that driver, too?

Adding some people to CC.


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