linux-kernel - Re: [PATCH v3] i3c: master: support to adjust first broadcast address speed

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Message-ID: <20240826101323.746b617c@xps-13>
Date: Mon, 26 Aug 2024 10:13:23 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: carlos.song@....com
Cc: alexandre.belloni@...tlin.com, linux-i3c@...ts.infradead.org,
 linux-kernel@...r.kernel.org, imx@...ts.linux.dev, linux-imx@....com
Subject: Re: [PATCH v3] i3c: master: support to adjust first broadcast
 address speed

Hi Carlos,

carlos.song@....com wrote on Mon, 26 Aug 2024 13:09:57 +0800:

> From: Carlos Song <carlos.song@....com>
> 
> According to I3C spec 6.2 Timing Specification, the Open Drain High Period
> of SCL Clock timing for first broadcast address should be adjusted to 200ns
> at least. I3C device working as i2c device will see the broadcast to close
> its Spike Filter then change to work at I3C mode. After that I3C open drain
> SCL high level should be adjusted back.
> 
> Signed-off-by: Carlos Song <carlos.song@....com>
> Reviewed-by: Frank Li <Frank.Li@....com>

Reviewed-by: Miquel Raynal <miquel.raynal@...tlin.com>

Frank, did you test it with eg. the Silvaco master?

Thanks,
Miquèl