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

Signed-off-by: Chanwoo Choi <cw00.c...@samsung.com>
Cc: Kukjin Kim <kg...@kernel.org>
Cc: Krzysztof Kozlowski <k...@kernel.org>
Cc: linux-samsung-...@vger.kernel.org
Cc: linux-arm-ker...@lists.infradead.org
Cc: linux-kernel@vger.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

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