lkml.org 
[lkml]   [2024]   [Apr]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/4] pmdomain: renesas: rcar-sysc: Cleanups and R-Car M3-W quirk handling
Date
	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

\
 
 \ /
  Last update: 2024-04-17 12:31    [W:0.095 / U:0.832 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site