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It is useful to know which component cannot be powered on. Signed-off-by: Nicolas Boichat <drinkcat@chromium.org> Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Reviewed-by: Steven Price <steven.price@arm.com> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200207052627.130118-4-drinkcat@chromium.org