Message ID | 20230913-multiple-state-scu-v1-2-9d91c6904ffa@nxp.com |
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Series |
genpd: imx8: support multiple states
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Commit Message
Peng Fan (OSS)
Sept. 13, 2023, 2:05 a.m. UTC
From: Dong Aisheng <aisheng.dong@nxp.com> For a domain has no working devices anymore, let's choose the deepest state to enter to save power. e.g. driver probe failure. Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com> --- drivers/base/power/domain.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 22cfa3020b18..1887eb1b3130 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -730,6 +730,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, if (atomic_read(&genpd->sd_count) > 0) return -EBUSY; + /* Choose the deepest state if no devices using this domain */ + if (!genpd->device_count) + genpd->state_idx = genpd->state_count - 1; + ret = _genpd_power_off(genpd, true); if (ret) { genpd->states[genpd->state_idx].rejected++;