linux-kernel - Re: [PATCH 0/4] pmdomain: renesas: rcar-sysc: Cleanups and R-Car M3-W quirk handling

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Date: Thu, 18 Apr 2024 16:55:56 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>, linux-pm@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] pmdomain: renesas: rcar-sysc: Cleanups and R-Car M3-W
 quirk handling

On Wed, 17 Apr 2024 at 12:31, Geert Uytterhoeven
<geert+renesas@...der.be> wrote:
>
>         Hi all,
>
> According to the hardware team, R-Car H3 ES1.0 and R-Car M3-W have a
> rare quirk where powering down the A3IR, A3VC, and A3VP power domains
> requires an extra delay of 1 µs.  So far upstream never handled that,
> but the BSP has a fix[1].  As support for R-Car H3 ES1.x was dropped in
> v6.4, only R-Car M3-W still needs to be handled.
>
> The BSP fix relies on hard-coded string comparisons of power domain
> names, and thus applies to all R-Car Gen3 SoCs (many introduced after
> the original fix was written) having domains with a matching name,
> whether they are affected or not.  Hence I took the opportunity to
> refactor the R-Car SYSC driver first, and came up with a less-intrusive
> fix.
>
> Thanks for your comments!
>
> [1] https://github.com/renesas-rcar/linux-bsp/commit/495e47e390499c522197352a08f423e8a3b41e83
>
> Geert Uytterhoeven (4):
>   pmdomain: renesas: rcar-sysc: Absorb rcar_sysc_ch into rcar_sysc_pd
>   pmdomain: renesas: rcar-sysc: Split R-Car M3-W and M3-W+ sub-drivers
>   pmdomain: renesas: rcar-sysc: Remove rcar_sysc_nullify() helper
>   pmdomain: renesas: rcar-sysc: Add R-Car M3-W power-off delay quirk
>
>  drivers/pmdomain/renesas/Makefile             |  4 +-
>  .../{r8a7796-sysc.c => r8a77960-sysc.c}       | 34 +++------
>  .../{r8a7796-sysc.c => r8a77961-sysc.c}       | 28 ++------
>  drivers/pmdomain/renesas/rcar-sysc.c          | 70 ++++++++-----------
>  drivers/pmdomain/renesas/rcar-sysc.h          |  9 +--
>  5 files changed, 43 insertions(+), 102 deletions(-)
>  copy drivers/pmdomain/renesas/{r8a7796-sysc.c => r8a77960-sysc.c} (64%)
>  rename drivers/pmdomain/renesas/{r8a7796-sysc.c => r8a77961-sysc.c} (69%)
>

Applied for next, thanks!

Kind regards
Uffe