linux-kernel - Re: [PATCH 5.15 73/76] regmap: Add bulk read/write callbacks into regmap

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Message-ID: <ZfHfEyb6XKrE2MBE@sashalap>
Date: Wed, 13 Mar 2024 13:14:59 -0400
From: Sasha Levin <sashal@...nel.org>
To: Mark Brown <broonie@...nel.org>
Cc: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Marek Vasut <marex@...x.de>,
	Jagan Teki <jagan@...rulasolutions.com>,
	Maxime Ripard <maxime@...no.tech>,
	Robert Foss <robert.foss@...aro.org>,
	Sam Ravnborg <sam@...nborg.org>,
	Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: [PATCH 5.15 73/76] regmap: Add bulk read/write callbacks into
 regmap_config

On Wed, Mar 13, 2024 at 04:46:56PM +0000, Mark Brown wrote:
>On Wed, Mar 13, 2024 at 12:42:20PM -0400, Sasha Levin wrote:
>> From: Marek Vasut <marex@...x.de>
>>
>> [ Upstream commit d77e745613680c54708470402e2b623dcd769681 ]
>>
>> Currently the regmap_config structure only allows the user to implement
>> single element register read/write using .reg_read/.reg_write callbacks.
>> The regmap_bus already implements bulk counterparts of both, and is being
>> misused as a workaround for the missing bulk read/write callbacks in
>> regmap_config by a couple of drivers. To stop this misuse, add the bulk
>> read/write callbacks to regmap_config and call them from the regmap core
>> code.
>
>This fairly clearly new functionality.

It is, but its needed for 3f42b142ea11 ("serial: max310x: fix IO data
corruption in batched operations") which uses this new functionality.

-- 
Thanks,
Sasha