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| author | Dien Pham <dien.pham.ry@renesas.com> | 2024-02-13 00:26:11 +0000 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2024-02-14 10:26:12 +0100 |
| commit | 713240877a26f3cc035d6531795bd819dfaa633c (patch) | |
| tree | 336800f4b4a101853c4b9fb027a31113002e851a /drivers/pmdomain | |
| parent | 5bf85865eaaa21d453f75d479387743697858a26 (diff) | |
| download | linux-713240877a26f3cc035d6531795bd819dfaa633c.tar.gz linux-713240877a26f3cc035d6531795bd819dfaa633c.tar.bz2 linux-713240877a26f3cc035d6531795bd819dfaa633c.zip | |
pmdomain: renesas: Adjust the waiting time to cover the worst case
Description in HWM rev0.51E, 9.4 Usage notes, page 455 tells
"It takes several hundreds of microseconds to shutting off and
resuming power domain. Because actual time required for
shutting off and resuming depends on the status of on-board
power line, shutoff/resume time is not guaranteed by
electrical specification"
Let's assume the safe value of waiting is about 1000us.
Signed-off-by: Dien Pham <dien.pham.ry@renesas.com>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Tho Vu <tho.vu.wh@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/8734tx8b18.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/pmdomain')
| -rw-r--r-- | drivers/pmdomain/renesas/rcar-sysc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pmdomain/renesas/rcar-sysc.c b/drivers/pmdomain/renesas/rcar-sysc.c index eed47696e825..35d9aa0dfab8 100644 --- a/drivers/pmdomain/renesas/rcar-sysc.c +++ b/drivers/pmdomain/renesas/rcar-sysc.c @@ -45,10 +45,10 @@ #define PWRER_OFFS 0x14 /* Power Shutoff/Resume Error */ -#define SYSCSR_TIMEOUT 100 +#define SYSCSR_TIMEOUT 1000 #define SYSCSR_DELAY_US 1 -#define PWRER_RETRIES 100 +#define PWRER_RETRIES 1000 #define PWRER_DELAY_US 1 #define SYSCISR_TIMEOUT 1000 |