[PATCH 11/15] drm/panfrost: set devfreq clock name

[Clément Péron <peron.clem@xxxxxxxxx>]

Some SoCs have  several clocks defined and the OPP core
needs to know the exact name of the clk to use.

Set the clock name to "core".

Signed-off-by: Clément Péron <peron.clem@xxxxxxxxx>
---
 drivers/gpu/drm/panfrost/panfrost_devfreq.c | 13 +++++++++++++
 drivers/gpu/drm/panfrost/panfrost_devfreq.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 9ffea0d4a087..6bf3541b4d53 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -103,6 +103,14 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
 
 	spin_lock_init(&pfdevfreq->lock);
 
+	opp_table = dev_pm_opp_set_clkname(dev, "core");
+	if (IS_ERR(opp_table)) {
+		ret = PTR_ERR(opp_table);
+		goto err_fini;
+	}
+
+	pfdevfreq->clkname_opp_table = opp_table;
+
 	opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
 					      pfdev->comp->num_supplies);
 	if (IS_ERR(opp_table)) {
@@ -176,6 +184,11 @@ void panfrost_devfreq_fini(struct panfrost_device *pfdev)
 		dev_pm_opp_put_regulators(pfdevfreq->regulators_opp_table);
 		pfdevfreq->regulators_opp_table = NULL;
 	}
+
+	if (pfdevfreq->clkname_opp_table) {
+		dev_pm_opp_put_clkname(pfdevfreq->clkname_opp_table);
+		pfdevfreq->clkname_opp_table = NULL;
+	}
 }
 
 void panfrost_devfreq_resume(struct panfrost_device *pfdev)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
index 347cde4786cf..1f2475e1d034 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h
@@ -16,6 +16,7 @@ struct panfrost_device;
 struct panfrost_devfreq {
 	struct devfreq *devfreq;
 	struct opp_table *regulators_opp_table;
+	struct opp_table *clkname_opp_table;
 	struct thermal_cooling_device *cooling;
 	bool opp_of_table_added;
 
-- 
2.20.1

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