Messages in this thread Patch in this message | | | From | Nicolas Boichat <> | Subject | [PATCH] soc: mediatek: Check if power domains can be powered on at boot time | Date | Thu, 30 Jul 2020 12:01:08 +0800 |
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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).
Fixes: c84e358718a66f7 ("soc: Mediatek: Add SCPSYS power domain driver") Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
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drivers/soc/mediatek/mtk-scpsys.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c index f669d3754627dad..0055a52a49733d5 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 = genpd->power_on(genpd) >= 0; - pm_genpd_init(genpd, NULL, false); + pm_genpd_init(genpd, NULL, !on); } /* -- 2.28.0.rc0.142.g3c755180ce-goog
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