linux-kernel - RE: [PATCH v2 2/3] mfd: syscon: Remove the platform driver support

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Message-ID: <000101db54e0$3d4b15a0$b7e140e0$@samsung.com>
Date: Mon, 23 Dec 2024 07:43:18 +0530
From: "Pankaj Dubey" <pankaj.dubey@...sung.com>
To: "'Rob Herring \(Arm\)'" <robh@...nel.org>, "'Lee Jones'"
	<lee@...nel.org>, "'Arnd Bergmann'" <arnd@...db.de>, "'Heiko Stuebner'"
	<heiko@...ech.de>, "'Liviu Dudau'" <liviu.dudau@....com>, "'Sudeep Holla'"
	<sudeep.holla@....com>, "'Lorenzo	Pieralisi'" <lpieralisi@...nel.org>
Cc: "'Peter Griffin'" <peter.griffin@...aro.org>, "'Will McVicker'"
	<willmcvicker@...gle.com>, "'John Madieu'" <john.madieu.xa@...renesas.com>,
	"'Krzysztof Kozlowski'" <krzysztof.kozlowski@...aro.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v2 2/3] mfd: syscon: Remove the platform driver support



> -----Original Message-----
> From: Rob Herring (Arm) <robh@...nel.org>
> Sent: Tuesday, December 17, 2024 11:42 PM
> To: Lee Jones <lee@...nel.org>; Arnd Bergmann <arnd@...db.de>; Pankaj
> Dubey <pankaj.dubey@...sung.com>; Heiko Stuebner <heiko@...ech.de>;
> Liviu Dudau <liviu.dudau@....com>; Sudeep Holla <sudeep.holla@....com>;
> Lorenzo Pieralisi <lpieralisi@...nel.org>
> Cc: Peter Griffin <peter.griffin@...aro.org>; Will McVicker
> <willmcvicker@...gle.com>; John Madieu <john.madieu.xa@...renesas.com>;
> Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>; linux-
> kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org
> Subject: [PATCH v2 2/3] mfd: syscon: Remove the platform driver support
> 
> The platform driver is dead code. It is not used by DT platforms since commit
> bdb0066df96e ("mfd: syscon: Decouple syscon interface from platform devices")
> which said:
> 
>     For non-DT based platforms, this patch keeps syscon platform driver
>     structure so that syscon can be probed and such non-DT based drivers
>     can use syscon_regmap_lookup_by_pdev API and access regmap handles.
>     Once all users of "syscon_regmap_lookup_by_pdev" migrated to DT based,
>     we can completely remove platform driver of syscon, and keep only helper
>     functions to get regmap handles.
> 
> The last user of syscon_regmap_lookup_by_pdevname() was removed in 2018.
> syscon_regmap_lookup_by_pdevname() was then removed in 2019, but that
> commit failed to remove the rest of the platform driver.
> 
> Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
> ---

Reviewed-by: Pankaj Dubey <pankaj.dubey@...sung.com>

Tested on arm64: Tesla FSD

Tested-by: Pankaj Dubey <pankaj.dubey@...sung.com>

Thanks,
Pankaj Dubey