linux-kernel - Re: [PATCH v4 1/3] hwmon: (pmbus/core) improve handling of write protected regulators

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Message-ID: <0afdcb04-5ada-4bd0-b1e1-c28663f952f0@roeck-us.net>
Date: Mon, 2 Dec 2024 22:06:26 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Jerome Brunet <jbrunet@...libre.com>
Cc: Jean Delvare <jdelvare@...e.com>, Jonathan Corbet <corbet@....net>,
	Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>,
	linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org
Subject: Re: [PATCH v4 1/3] hwmon: (pmbus/core) improve handling of write
 protected regulators

On Mon, Dec 02, 2024 at 11:28:00AM +0100, Jerome Brunet wrote:
> Writing PMBus protected registers does succeed from the smbus perspective,
> even if the write is ignored by the device and a communication fault is
> raised. This fault will silently be caught and cleared by pmbus irq if one
> has been registered.
> 
> This means that the regulator call may return succeed although the
> operation was ignored.
> 
> With this change, the operation which are not supported will be properly
> flagged as such and the regulator framework won't even try to execute them.
> 
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>

Applied.

Thanks,
Guenter