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| author | Marek Vasut <marek.vasut+renesas@mailbox.org> | 2025-09-18 05:04:43 +0200 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2025-10-14 10:36:25 +0200 |
| commit | 62abfd7bedc2b3d86d4209a4146f9d2b5ae21fab (patch) | |
| tree | d8a844cc0edaa547f83dfbe25a13ad65b6e5e086 /rust/helpers/build_bug.c | |
| parent | 3a8660878839faadb4f1a6dd72c3179c1df56787 (diff) | |
clk: renesas: cpg-mssr: Add missing 1ms delay into reset toggle callback
R-Car V4H Reference Manual R19UH0186EJ0130 Rev.1.30 Apr. 21, 2025 page
583 Figure 9.3.1(a) Software Reset flow (A) as well as flow (B) / (C)
indicate after reset has been asserted by writing a matching reset bit
into register SRCR, it is mandatory to wait 1ms.
This 1ms delay is documented on R-Car V4H and V4M, it is currently
unclear whether S4 is affected as well. This patch does apply the extra
delay on R-Car S4 as well.
Fix the reset driver to respect the additional delay when toggling
resets. Drivers which use separate reset_control_(de)assert() must
assure matching delay in their driver code.
Fixes: 0ab55cf18341 ("clk: renesas: cpg-mssr: Add support for R-Car V4H")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20250918030552.331389-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Diffstat (limited to 'rust/helpers/build_bug.c')
0 files changed, 0 insertions, 0 deletions