linux-kernel - Re: [PATCH v2 9/9] i2c: riic: Implement bus recovery

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Message-ID: <Z2XewglpALJFE1Ay@ninjato>
Date: Fri, 20 Dec 2024 22:16:50 +0100
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Chris Brandt <chris.brandt@...esas.com>,
	Andi Shyti <andi.shyti@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Wolfram Sang <wsa@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	linux-renesas-soc@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v2 9/9] i2c: riic: Implement bus recovery

On Wed, Dec 18, 2024 at 12:16:18AM +0000, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> Implement bus recovery by reinitializing the hardware to reset the bus
> state and generating 9 clock cycles (and a stop condition) to release
> the SDA line.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

I need to ask a high level question first: why don't you use the general
scl_recovery algorithm? We have stuff like get/set_scl/sda as well as
(un)prepare_recovery. Won't that do?


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