linux-kernel - Re: [PATCH v10] i2c: riic: Implement bus recovery

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Message-ID: <24rt2nozt3gk26vctj6zx2rgvoteus7lpzboysifbndhmcjzwn@6szzps23svdw>
Date: Thu, 1 May 2025 23:19:09 +0200
From: Andi Shyti <andi.shyti@...nel.org>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Chris Brandt <chris.brandt@...esas.com>, 
	Wolfram Sang <wsa+renesas@...g-engineering.com>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Andy Shevchenko <andy@...nel.org>, 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 v10] i2c: riic: Implement bus recovery

Hi Lad,

On Thu, May 01, 2025 at 09:40:03PM +0100, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> Implement I2C bus recovery support for the RIIC controller by making use
> of software-controlled SCL and SDA line manipulation. The controller allows
> forcing SCL and SDA levels through control bits, which enables generation
> of manual clock pulses and a stop condition to free a stuck bus.
> 
> This implementation wires up the bus recovery mechanism using
> i2c_generic_scl_recovery and provides get/set operations for SCL and SDA.
> 
> This allows the RIIC driver to recover from bus hang scenarios where SDA
> is held low by a slave.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> Reviewed-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Tested-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@...esas.com>

I'm happy to see this patch in. Thanks Wolfram for your tests and
reviews.

Merged to i2c/i2c-host.

Thanks,
Andi