linux-kernel - Re: [PATCH 9/9] ARM: dts: exynos5250: remove deprecated samsung,syscon-phandle

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Date: Tue, 23 Jan 2024 08:41:52 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Peter Griffin" <peter.griffin@...aro.org>,
 "Rob Herring" <robh+dt@...nel.org>, krzysztof.kozlowski+dt@...aro.org,
 "Guenter Roeck" <linux@...ck-us.net>,
 "Wim Van Sebroeck" <wim@...ux-watchdog.org>,
 "Conor Dooley" <conor+dt@...nel.org>,
 "Alim Akhtar" <alim.akhtar@...sung.com>, jaewon02.kim@...sung.com,
 chanho61.park@...sung.com, "Sam Protsenko" <semen.protsenko@...aro.org>
Cc: kernel-team@...roid.com, "Tudor Ambarus" <tudor.ambarus@...aro.org>,
 André Draszik <andre.draszik@...aro.org>,
 saravanak@...gle.com, "William McVicker" <willmcvicker@...gle.com>,
 linux-fsd@...la.com, linux-watchdog@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH 9/9] ARM: dts: exynos5250: remove deprecated samsung,syscon-phandle

On Mon, Jan 22, 2024, at 23:57, Peter Griffin wrote:
> samsung,syscon-phandle is no longer used by the Samsung watchdog driver
> to access PMU registers.
>
> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>

Can you mention the driver commit that led to the property no
longer being required? Since this change would break compatibility
with older kernels, I would want to make sure that at least a
couple of years have passed since then to give users an upgrade
path.

      Arnd