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pmdomain: ti_sci: add wakeup constraint management

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During system-wide suspend, check all devices connected to PM domain
to see if they are wakeup-enabled.  If so, set a TI SCI device
constraint.

Note: DM firmware clears all constraints on resume.

Co-developed-by: Vibhore Vardhan <[email protected]>
Signed-off-by: Vibhore Vardhan <[email protected]>
Reviewed-by: Ulf Hansson <[email protected]>
Tested-by: Dhruva Gole <[email protected]>
Signed-off-by: Kevin Hilman <[email protected]>
Reviewed-by: Dhruva Gole <[email protected]>
Message-ID: <20241206-lpm-v6-10-constraints-pmdomain-v6-2-833980158c68@baylibre.com>
Signed-off-by: Ulf Hansson <[email protected]>
This commit is contained in:
Kevin Hilman authored and Ulf Hansson committed 2024-12-10 12:37:26 +01:00
1 parent b5fc945365
commit 9d8aa0dd3b
1 file changed
+17
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drivers/pmdomain/ti/ti_sci_pm_domains.c
+17
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@@ -79,6 +79,21 @@ static void ti_sci_pd_set_lat_constraint(struct device *dev, s32 val)
}
#endif
static inline void ti_sci_pd_set_wkup_constraint(struct device *dev)
{
struct generic_pm_domain *genpd = pd_to_genpd(dev->pm_domain);
struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(genpd);
const struct ti_sci_handle *ti_sci = pd->parent->ti_sci;
int ret;
if (device_may_wakeup(dev)) {
ret = ti_sci->ops.pm_ops.set_device_constraint(ti_sci, pd->idx,
TISCI_MSG_CONSTRAINT_SET);
if (!ret)
dev_dbg(dev, "ti_sci_pd: ID:%d set device constraint.\n", pd->idx);
}
}
/*
* ti_sci_pd_power_off(): genpd power down hook
* @domain: pointer to the powerdomain to power off
@@ -121,6 +136,8 @@ static int ti_sci_pd_suspend(struct device *dev)
if (ti_sci_pd_is_valid_constraint(val))
ti_sci_pd_set_lat_constraint(dev, val);
ti_sci_pd_set_wkup_constraint(dev);
return 0;
}
#else