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From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: rafael@kernel.org, robh@kernel.org
Cc: daniel.lezcano@linaro.org,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Sudeep Holla <sudeep.holla@arm.com>,
	linux-pm@vger.kernel.org (open list:CPU IDLE TIME MANAGEMENT
	FRAMEWORK), linux-kernel@vger.kernel.org (open list),
	linux-arm-kernel@lists.infradead.org (open list:CPUIDLE DRIVER -
	ARM PSCI)
Subject: [PATCH 4/4] thermal: cpuidle: Register cpuidle cooling device
Date: Mon, 30 Mar 2020 00:03:20 +0200
Message-ID: <20200329220324.8785-4-daniel.lezcano@linaro.org> (raw)
In-Reply-To: <20200329220324.8785-1-daniel.lezcano@linaro.org>

The cpuidle driver can be used as a cooling device by injecting idle
cycles. The DT binding for the idle state added an optional

When the property is set, register the cpuidle driver with the idle
state node pointer as a cooling device. The thermal framework will do
the association automatically with the thermal zone via the
cooling-device defined in the device tree cooling-maps section.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/cpuidle/cpuidle-arm.c  | 5 +++++
 drivers/cpuidle/cpuidle-psci.c | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/cpuidle/cpuidle-arm.c b/drivers/cpuidle/cpuidle-arm.c
index 9e5156d39627..2406ac0ae134 100644
--- a/drivers/cpuidle/cpuidle-arm.c
+++ b/drivers/cpuidle/cpuidle-arm.c
@@ -8,6 +8,7 @@
 
 #define pr_fmt(fmt) "CPUidle arm: " fmt
 
+#include <linux/cpu_cooling.h>
 #include <linux/cpuidle.h>
 #include <linux/cpumask.h>
 #include <linux/cpu_pm.h>
@@ -124,6 +125,10 @@ static int __init arm_idle_init_cpu(int cpu)
 	if (ret)
 		goto out_kfree_drv;
 
+	ret = cpuidle_cooling_register(drv);
+	if (ret)
+		pr_err("Failed to register the idle cooling device: %d\n", ret);
+
 	return 0;
 
 out_kfree_drv:
diff --git a/drivers/cpuidle/cpuidle-psci.c b/drivers/cpuidle/cpuidle-psci.c
index edd7a54ef0d3..8e805bff646f 100644
--- a/drivers/cpuidle/cpuidle-psci.c
+++ b/drivers/cpuidle/cpuidle-psci.c
@@ -9,6 +9,7 @@
 #define pr_fmt(fmt) "CPUidle PSCI: " fmt
 
 #include <linux/cpuhotplug.h>
+#include <linux/cpu_cooling.h>
 #include <linux/cpuidle.h>
 #include <linux/cpumask.h>
 #include <linux/cpu_pm.h>
@@ -305,6 +306,10 @@ static int __init psci_idle_init_cpu(int cpu)
 	if (ret)
 		goto out_kfree_drv;
 
+	ret = cpuidle_cooling_register(drv);
+	if (ret)
+		pr_err("Failed to register the idle cooling device: %d\n", ret);
+
 	return 0;
 
 out_kfree_drv:
-- 
2.17.1


  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-29 22:03 [PATCH V2 1/4] powercap/drivers/idle_inject: Specify idle state max latency Daniel Lezcano
2020-03-29 22:03 ` [PATCH 2/4] dt-bindings: thermal: Add the idle cooling device Daniel Lezcano
2020-04-07 13:36   ` Daniel Lezcano
2020-04-07 14:09   ` Amit Kucheria
2020-04-10 16:59   ` Rob Herring
2020-04-12 18:08     ` Daniel Lezcano
2020-03-29 22:03 ` [PATCH 3/4] thermal/drivers/cpuidle_cooling: Change the registration function Daniel Lezcano
2020-03-30  9:58   ` Viresh Kumar
2020-03-29 22:03 ` Daniel Lezcano [this message]
2020-04-03  9:38 ` [PATCH V2 1/4] powercap/drivers/idle_inject: Specify idle state max latency Rafael J. Wysocki
2020-04-03 11:09   ` Daniel Lezcano

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