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Message-Id: <20241101-lpm-v6-10-constraints-pmdomain-v5-2-3011aa04622f@baylibre.com>
Date: Fri, 01 Nov 2024 08:36:21 -0700
From: Kevin Hilman <khilman@...libre.com>
To: Ulf Hansson <ulf.hansson@...aro.org>, linux-pm@...r.kernel.org
Cc: Nishanth Menon <nm@...com>, Dhruva Gole <d-gole@...com>,
Akashdeep Kaur <a-kaur@...com>, Sebin Francis <sebin.francis@...com>,
Markus Schneider-Pargmann <msp@...libre.com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 2/3] pmdomain: ti_sci: add wakeup constraint management
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@...com>
Signed-off-by: Vibhore Vardhan <vibhore@...com>
Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
Tested-by: Dhruva Gole <d-gole@...com>
Signed-off-by: Kevin Hilman <khilman@...libre.com>
---
drivers/pmdomain/ti/ti_sci_pm_domains.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/pmdomain/ti/ti_sci_pm_domains.c b/drivers/pmdomain/ti/ti_sci_pm_domains.c
index c976a382d64c807daea72fa1ea9d6c11c8773762..ff529fa2d6135cc2fb32ae8a3ca26ac055f66cf5 100644
--- a/drivers/pmdomain/ti/ti_sci_pm_domains.c
+++ b/drivers/pmdomain/ti/ti_sci_pm_domains.c
@@ -74,6 +74,21 @@ static void ti_sci_pd_set_lat_constraint(struct device *dev, s32 val)
pd->idx, val);
}
+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
@@ -116,6 +131,8 @@ 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
--
2.46.2
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