Re: [PATCH 2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8

From	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8
Date	2017-03-14 15:10 +0100
Message-ID	<tkVjc-1eJ-31@gated-at.bofh.it> (permalink)
References	<tjWU1-cq-3@gated-at.bofh.it> <tjWU1-cq-5@gated-at.bofh.it> <tkVjc-1eJ-33@gated-at.bofh.it> <tjWU1-cq-5@gated-at.bofh.it>
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On Saturday, March 11, 2017 11:38:55 PM Krzysztof Kozlowski wrote:
> The Exynos Power Management Unit (PMU) drivers contain quite large
> static arrays of register values necessary for given Exynos SoC to enter
> low power mode.  All this data is useless for ARMv8 SoC like
> Exynos5433, because the image will not be shared between ARMv7 and
> ARMv8.
> 
> Add additional Kconfig symbol for selecting the SoC-specific driver
> addons thus skipping the useless data in the final image (this is
> similar approach to chosen for Exynos clock controller drivers):
>  - exynos-pmu driver will be compiled on both architectures ARMv7
>    and ARMv8,
>  - additional driver_data for ARMv7 SoCs will not be built on ARMv8
>    and a macro will return NULL for them in of_device_id - this should
>    be safe as these compatibles cannot match on ARMv7 and driver
>    anyway handles NULL driver_data,
>  - on ARMv8 compile only exynos-pmu driver which exposes the
>    syscon-regmap for PMU address space.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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[PATCH 2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8 Krzysztof Kozlowski <krzk@kernel.org> - 2017-03-11 22:40 +0100
  Re: [2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8 Alim Akhtar <alim.akhtar@samsung.com> - 2017-03-14 09:00 +0100
    Re: [2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8 Krzysztof Kozlowski <krzk@kernel.org> - 2017-03-14 09:10 +0100
      Re: [2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8 Alim Akhtar <alim.akhtar@samsung.com> - 2017-03-14 09:50 +0100
        Re: [2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8 Krzysztof Kozlowski <krzk@kernel.org> - 2017-03-14 10:20 +0100
          Re: [2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8 Alim Akhtar <alim.akhtar@samsung.com> - 2017-03-14 15:40 +0100
  Re: [PATCH 2/3] soc: samsung: Do not build ARMv7 PMU drivers on ARMv8 Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> - 2017-03-14 15:10 +0100

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