linux-kernel - Re: [PATCH] mfd: syscon: Restore device_node_to

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Message-ID: <15654ad7-1afb-41bf-afa9-c03c2bbb2cfa@notapiano>
Date: Tue, 28 Jan 2025 19:53:59 -0300
From: Nícolas F. R. A. Prado <nfraprado@...labora.com>
To: "Rob Herring (Arm)" <robh@...nel.org>
Cc: Lee Jones <lee@...nel.org>, Arnd Bergmann <arnd@...db.de>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Pankaj Dubey <pankaj.dubey@...sung.com>,
	Will McVicker <willmcvicker@...gle.com>,
	John Madieu <john.madieu.xa@...renesas.com>,
	Nishanth Menon <nm@...com>, Vaishnav Achath <vaishnav.a@...com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd: syscon: Restore device_node_to_regmap() for
 non-syscon nodes

On Fri, Jan 24, 2025 at 01:16:44PM -0600, Rob Herring (Arm) wrote:
> Commit ba5095ebbc7a ("mfd: syscon: Allow syscon nodes without a
> "syscon" compatible") broke drivers which call device_node_to_regmap()
> on nodes without a "syscon" compatible. Restore the prior behavior for
> device_node_to_regmap().
> 
> This also makes using device_node_to_regmap() incompatible with
> of_syscon_register_regmap() again, so add kerneldoc for
> device_node_to_regmap() and syscon_node_to_regmap() to make it clear
> how and when each one should be used.
> 
> Fixes: ba5095ebbc7a ("mfd: syscon: Allow syscon nodes without a "syscon" compatible")
> Cc: Will McVicker <willmcvicker@...gle.com>
> Cc: John Madieu <john.madieu.xa@...renesas.com>
> Cc: Nishanth Menon <nm@...com>
> Reported-by: Vaishnav Achath <vaishnav.a@...com>
> Signed-off-by: Rob Herring (Arm) <robh@...nel.org>

Still hitting this as of next-20250128. This patch fixed the issue which
otherwise prevents boot on the Genio 700 EVK and Genio 1200 EVK boards.

Tested-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>

Thanks,
Nícolas