This patch registers the Exynos Bus-Frequency scaling device as a cooling device of thermal management.
Signed-off-by: Chanwoo Choi <[email protected]> Cc: Kukjin Kim <[email protected]> Cc: Krzysztof Kozlowski <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] --- drivers/devfreq/exynos-bus.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c index c25658b26598..1c7521b65c2f 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 +471,19 @@ static int exynos_bus_probe(struct platform_device *pdev) goto err; } + /* + * Register devfreq cooling device if thermal DT code + * takes care of matching them. + */ + if (of_find_property(np, "#cooling-cells", NULL)) { + bus->cdev = of_devfreq_cooling_register(np, bus->devfreq); + if (IS_ERR(bus->cdev)) { + dev_err(dev, "running exynos-bus without cooling device\n"); + bus->cdev = NULL; + } + } + of_node_put(np); + goto out; passive: /* Initialize the struct profile and governor data for passive device */ @@ -514,6 +530,16 @@ static int exynos_bus_probe(struct platform_device *pdev) return ret; } +static int exynos_bus_remove(struct platform_device *pdev) +{ + struct exynos_bus *bus = platform_get_drvdata(pdev); + + if (bus->cdev) + devfreq_cooling_unregister(bus->cdev); + + return 0; +} + #ifdef CONFIG_PM_SLEEP static int exynos_bus_resume(struct device *dev) { @@ -556,6 +582,7 @@ static int exynos_bus_suspend(struct device *dev) static struct platform_driver exynos_bus_platdrv = { .probe = exynos_bus_probe, + .remove = exynos_bus_remove, .driver = { .name = "exynos-bus", .pm = &exynos_bus_pm, -- 1.9.1
