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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2025-09-09 13:11:23 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2025-09-11 12:36:50 +0200 |
| commit | d929e42deaf7e2d165ac702421d02eeb9d544c70 (patch) | |
| tree | e6637aae3ad850e9802aa139bc4bd5e321289c25 /drivers/base/class_simple.c | |
| parent | 36bbaec460db0fb2f6d2641470b4a6f3891a492a (diff) | |
pmdomain: renesas: rcar-gen4-sysc: Don't keep unused PM domains powered-on
The recent changes to genpd makes a genpd OF provider that is powered-on at
initialization to stay powered-on, until the ->sync_state() callback is
invoked for it.
This may not happen at all, if we wait for a consumer device to be probed,
leading to wasting energy. There are ways to enforce the ->sync_state()
callback to be invoked, through sysfs or via the probe-defer-timeout, but
none of them in its current form are a good fit for rcar-gen4-sysc PM
domains.
Let's therefore opt-out from this behaviour of genpd for now, by using the
GENPD_FLAG_NO_STAY_ON.
Link: https://lore.kernel.org/all/20250701114733.636510-1-ulf.hansson@linaro.org/
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: 0e789b491ba0 ("pmdomain: core: Leave powered-on genpds on until sync_state")
Fixes: 13a4b7fb6260 ("pmdomain: core: Leave powered-on genpds on until late_initcall_sync")
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/base/class_simple.c')
0 files changed, 0 insertions, 0 deletions