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Date:   Sun, 10 May 2020 18:55:34 +0200
From:   Clément Péron <peron.clem@...il.com>
To:     Rob Herring <robh@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Steven Price <steven.price@....com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Clément Péron <peron.clem@...il.com>
Subject: [PATCH 11/15] drm/panfrost: set devfreq clock name

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@...il.com>
---
 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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