linux-kernel - [PATCH v2 8/8] PM / devfreq: exynos-bus: Register cooling device

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Date:   Thu, 21 Sep 2017 09:33:52 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
        cw00.choi@...sung.com
Cc:     rafael.j.wysocki@...el.com, chanwoo@...nel.org,
        inki.dae@...sung.com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 8/8] PM / devfreq: exynos-bus: Register cooling device

This patch registers the Exynos Bus-Frequency scaling device
as a cooling device of thermal management.

Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Cc: Kukjin Kim <kgene@...nel.org>
Cc: Krzysztof Kozlowski <krzk@...nel.org>
Cc: linux-samsung-soc@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/devfreq/Kconfig      |  1 +
 drivers/devfreq/exynos-bus.c | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index 6a172d338f6d..eb8128e08b2c 100644
--- a/drivers/devfreq/Kconfig
+++ b/drivers/devfreq/Kconfig
@@ -81,6 +81,7 @@ config ARM_EXYNOS_BUS_DEVFREQ
 	select DEVFREQ_GOV_SIMPLE_ONDEMAND
 	select DEVFREQ_GOV_PASSIVE
 	select DEVFREQ_EVENT_EXYNOS_PPMU
+	select DEVFREQ_THERMAL
 	select PM_DEVFREQ_EVENT
 	select PM_OPP
 	help
diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index c25658b26598..200ca0d11834 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -15,6 +15,7 @@
 #include <linux/clk.h>
 #include <linux/devfreq.h>
 #include <linux/devfreq-event.h>
+#include <linux/devfreq_cooling.h>
 #include <linux/device.h>
 #include <linux/export.h>
 #include <linux/module.h>
@@ -41,6 +42,8 @@ struct exynos_bus {
 	struct clk *clk;
 	unsigned int voltage_tolerance;
 	unsigned int ratio;
+
+	struct thermal_cooling_device *cdev;
 };
 
 /*
@@ -468,6 +471,14 @@ static int exynos_bus_probe(struct platform_device *pdev)
 		goto err;
 	}
 
+	/* Register devfreq cooling device */
+	bus->cdev = of_devfreq_cooling_register(np, bus->devfreq);
+	if (IS_ERR(bus->cdev) < 0) {
+		dev_err(dev, "failed to register cooling device\n");
+		ret = PTR_ERR(bus->cdev);
+		goto err;
+	}
+
 	goto out;
 passive:
 	/* Initialize the struct profile and governor data for passive device */
-- 
1.9.1