linux-kernel - Re: [PATCH v8 1/8] of/platform: Allow overlays to create platform devices from the root node

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Message-ID: <d0064808c62ff78efb5c5899cbfd4584.sboyd@kernel.org>
Date: Mon, 29 Jul 2024 15:37:06 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org, patches@...ts.linux.dev, kunit-dev@...glegroups.com, linux-kselftest@...r.kernel.org, devicetree@...r.kernel.org, Brendan Higgins <brendan.higgins@...ux.dev>, David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Rafael J . Wysocki <rafael@...nel.org>, Rob Herring <robh@...nel.org>, Saravana Kannan <saravanak@...gle.com>, Daniel Latypov <dlatypov@...gle.com>, Christian Marangi <ansuelsmth@...il.com>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Maxime Ripard <maxime@...no.tech>, Geert Uytterhoeven <geert+renesas@...der.be>
Subject: Re: [PATCH v8 1/8] of/platform: Allow overlays to create platform devices from the root node

Quoting Stephen Boyd (2024-07-18 14:05:00)
> We'd like to apply overlays to the root node in KUnit so we can test
> platform devices created as children of the root node.
> 
> On some architectures (powerpc), the root node isn't marked with
> OF_POPULATED_BUS. If an overlay tries to modify the root node on these
> platforms it will fail, while on other platforms, such as ARM, it will
> succeed. This is because the root node is marked with OF_POPULATED_BUS
> by of_platform_default_populate_init() calling
> of_platform_default_populate() with NULL as the first argument.
> 
> Loosen the requirement here so that platform devices can be created for
> nodes created as children of the root node via DT overlays even if the
> platform bus wasn't populated for the root node.
> 
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
> Cc: Saravana Kannan <saravanak@...gle.com>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> [sboyd@...nel.org: Folded in condition fix]
> Signed-off-by: Stephen Boyd <sboyd@...nel.org>
> ---

Applied to clk-next