linux-kernel - Re: [PATCH v2 0/6] can: mcp251xfd: add gpio functionality

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Date: Mon, 6 May 2024 12:02:44 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Gregor Herburger <gregor.herburger@...tq-group.com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
	Thomas Kopp <thomas.kopp@...rochip.com>, Vincent Mailhol <mailhol.vincent@...adoo.fr>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, linux-can@...r.kernel.org, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	linux@...tq-group.com
Subject: Re: [PATCH v2 0/6] can: mcp251xfd: add gpio functionality

On 06.05.2024 07:59:42, Gregor Herburger wrote:
> Hi all,
> 
> The mcp251xfd allows two pins to be configured as GPIOs. This series
> adds support for this feature.
> 
> The GPIO functionality is controlled with the IOCON register which has
> an erratum. The second patch is to work around this erratum. I am not
                  ^^^^^^
> sure if the place for the check and workaround in
> mcp251xfd_regmap_crc_write is correct or if the check could be bypassed
> with a direct call to mcp251xfd_regmap_crc_gather_write. If you have a
> better suggestion where to add the check please let me know.

Yes, better move the workaround to mcp251xfd_regmap_crc_gather_write().
I don't remember under which circumstances regmap uses the
gather_write() or the write() function.

> Patch 1-3 from https://lore.kernel.org/linux-can/20240429-mcp251xfd-runtime_pm-v1-0-c26a93a66544@pengutronix.de/

Nitpick: Please add your S-o-b to these patches.

Marc

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