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author | Ulf Hansson <ulf.hansson@linaro.org> | 2025-09-09 13:11:21 +0200 |
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committer | Ulf Hansson <ulf.hansson@linaro.org> | 2025-09-11 12:36:34 +0200 |
commit | 2bc12a8199a0f954d003faa4ad8d100a0b19d85a (patch) | |
tree | 2c7cb1c13c78575c7e537733d95ac9baf2ddbb08 /include/linux/overflow.h | |
parent | 002ebddd695a53999550e241b71950f1aa0e1ac4 (diff) |
pmdomain: rockchip: Fix regulator dependency with GENPD_FLAG_NO_STAY_ON
The deferred regulator retrieval for Rockchip PM domains are causing some
weird dependencies. More precisely, if the power-domain is powered-on from
the HW perspective, its corresponding regulator must not be powered-off via
regulator_init_complete(), which is a late_initcall_sync.
Even on platforms that don't have the domain-supply regulator specified for
the power-domain provider, may suffer from these problems.
More precisely, things just happen to work before, because
genpd_power_off_unused() (also a late_initcall_sync) managed to power-off
the PM domain before regulator_init_complete() powered-off the regulator.
Ideally this fragile dependency must be fixed properly for the Rockchip PM
domains, but until then, let's fallback to the previous behaviour by using
the GENPD_FLAG_NO_STAY_ON flag.
Link: https://lore.kernel.org/all/20250902-rk3576-lockup-regression-v1-1-c4a0c9daeb00@collabora.com/
Reported-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Sebastian Reichel <sebastian.reichel@collabora.com>
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")
Tested-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'include/linux/overflow.h')
0 files changed, 0 insertions, 0 deletions