linux-kernel - Re: [PATCH 1/3] dt-bindings: i2c: gpio: Add 'transition-delay-ms' property

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Date: Tue, 28 May 2024 09:49:04 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Bastien Curutchet <bastien.curutchet@...tlin.com>,
 Peter Rosin <peda@...ntia.se>, Andi Shyti <andi.shyti@...nel.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Peter Korsgaard <peter.korsgaard@...co.com>, Wolfram Sang <wsa@...nel.org>
Cc: linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, herve.codina@...tlin.com,
 christophercordahi@...ometrics.ca
Subject: Re: [PATCH 1/3] dt-bindings: i2c: gpio: Add 'transition-delay-ms'
 property

On 28/05/2024 08:59, Bastien Curutchet wrote:
> 
>> So just like RC binding, that's not a property of I2C mux. Maybe this
>> fits usage of GPIO RC / delay binding.
>>
> 
> IMHO that’s more of a MUX property than an RC binding because every MUX 
> needs some time to switch from one bus to another. It’s just that for 
> the vast majority of MUXes, this time is so small that it doesn’t need 
> to be described.


Hm, true, it's fine then.

However this probably should be microseconds not milliseconds to allow
greater granularity, just like gpio-delay.

Best regards,
Krzysztof