diff options
| author | Nicolas Boichat <drinkcat@chromium.org> | 2020-09-28 05:31:35 +0200 |
|---|---|---|
| committer | Matthias Brugger <matthias.bgg@gmail.com> | 2020-10-26 10:45:04 +0100 |
| commit | 4007844b05815717f522c7ea9914e24ad0ff6c79 (patch) | |
| tree | 84d776e2c845b7bf5c76c28ea9819f4b93db6554 /drivers/soc/mediatek/mtk-scpsys.c | |
| parent | Linux 5.10-rc1 (diff) | |
| download | linux-4007844b05815717f522c7ea9914e24ad0ff6c79.tar.xz linux-4007844b05815717f522c7ea9914e24ad0ff6c79.zip | |
soc: mediatek: Check if power domains can be powered on at boot time
In the error case, where a power domain cannot be powered on
successfully at boot time (in mtk_register_power_domains),
pm_genpd_init would still be called with is_off=false, and the
system would later try to disable the power domain again, triggering
warnings as disabled clocks are disabled again (and other potential
issues).
Also print a warning splat in that case, as this should never
happen.
Fixes: c84e358718a66f7 ("soc: Mediatek: Add SCPSYS power domain driver")
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Link: https://lore.kernel.org/r/20200928113107.v2.1.I5e6f8c262031d0451fe7241b744f4f3111c1ce71@changeid
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Diffstat (limited to 'drivers/soc/mediatek/mtk-scpsys.c')
| -rw-r--r-- | drivers/soc/mediatek/mtk-scpsys.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c index f669d3754627..ca75b14931ec 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c @@ -524,6 +524,7 @@ static void mtk_register_power_domains(struct platform_device *pdev, for (i = 0; i < num; i++) { struct scp_domain *scpd = &scp->domains[i]; struct generic_pm_domain *genpd = &scpd->genpd; + bool on; /* * Initially turn on all domains to make the domains usable @@ -531,9 +532,9 @@ static void mtk_register_power_domains(struct platform_device *pdev, * software. The unused domains will be switched off during * late_init time. */ - genpd->power_on(genpd); + on = !WARN_ON(genpd->power_on(genpd) < 0); - pm_genpd_init(genpd, NULL, false); + pm_genpd_init(genpd, NULL, !on); } /* |