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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 <vibhore@ti.com>
Signed-off-by: Vibhore Vardhan <vibhore@ti.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Message-ID: <20241206-lpm-v6-10-constraints-pmdomain-v6-2-833980158c68@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Kevin Hilman 2024-12-06 14:12:51 -08:00 • committed by Ulf Hansson
commit 9d8aa0dd3b
1 changed files with 17 additions and 0 deletions
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17
drivers/pmdomain/ti/ti_sci_pm_domains.c
View file

@ -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