Messages in this thread | | | From | Geert Uytterhoeven <> | Subject | [PATCH 0/4] pmdomain: renesas: rcar-sysc: Cleanups and R-Car M3-W quirk handling | Date | Wed, 17 Apr 2024 12:29:21 +0200 |
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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%)
-- 2.34.1
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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