From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Prabhakar <prabhakar.csengg@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>,
Andi Shyti <andi.shyti@kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Andy Shevchenko <andy@kernel.org>,
linux-renesas-soc@vger.kernel.org, linux-i2c@vger.kernel.org,
linux-kernel@vger.kernel.org,
Biju Das <biju.das.jz@bp.renesas.com>,
Fabrizio Castro <fabrizio.castro.jz@renesas.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: Re: [PATCH v9 1/2] i2c: riic: Implement bus recovery
Date: Thu, 1 May 2025 09:51:57 +0200 [thread overview]
Message-ID: <aBMoHST5o-H4BvkO@shikoro> (raw)
In-Reply-To: <20250430194647.332553-2-prabhakar.mahadev-lad.rj@bp.renesas.com>
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On Wed, Apr 30, 2025 at 08:46:46PM +0100, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.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@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
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next prev parent reply other threads:[~2025-05-01 7:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-30 19:46 [PATCH v9 0/2] i2c: riic: Implement bus recovery Prabhakar
2025-04-30 19:46 ` [PATCH v9 1/2] " Prabhakar
2025-05-01 7:51 ` Wolfram Sang [this message]
2025-05-01 14:16 ` Fabrizio Castro
2025-04-30 19:46 ` [PATCH v9 2/2] i2c: riic: Recover from arbitration loss Prabhakar
2025-04-30 20:17 ` Wolfram Sang
2025-04-30 20:29 ` Lad, Prabhakar
2025-05-01 7:58 ` Wolfram Sang
2025-05-01 9:02 ` Lad, Prabhakar
2025-05-01 19:44 ` Wolfram Sang
2025-05-02 9:29 ` Lad, Prabhakar
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