| Message ID | fdff26d908c5338df44574085701ed93a64af079.1548825443.git.amit.kucheria@linaro.org |
|---|---|
| State | Accepted |
| Commit | 5c238a8b599f1ae25eaeb08ad0e9e13e2b9eb023 |
| Headers | show |
| Series | cpufreq: Auto-register the driver as a thermal cooling device if asked | expand |
On 30-01-19, 10:52, Amit Kucheria wrote: > All cpufreq drivers do similar things to register as a cooling device. > Provide a cpufreq driver flag so drivers can just ask the cpufreq core > to register the cooling device on their behalf. This allows us to get > rid of duplicated code in the drivers. > > In order to allow this, we add a struct thermal_cooling_device pointer > to struct cpufreq_policy so that drivers don't need to store it in a > private data structure. > > Suggested-by: Stephen Boyd <swboyd@chromium.org> > Suggested-by: Viresh Kumar <viresh.kumar@linaro.org> > Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> > Reviewed-by: Matthias Kaehlcke <mka@chromium.org> > Tested-by: Matthias Kaehlcke <mka@chromium.org> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org> > --- > drivers/cpufreq/cpufreq.c | 11 +++++++++++ > include/linux/cpufreq.h | 9 +++++++++ > 2 files changed, 20 insertions(+) Thanks for the rework. This looks good now. -- viresh
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index a8fa684f5f90..cae730264bc0 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -19,6 +19,7 @@ #include <linux/cpu.h> #include <linux/cpufreq.h> +#include <linux/cpu_cooling.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/init.h> @@ -1316,6 +1317,10 @@ static int cpufreq_online(unsigned int cpu) if (cpufreq_driver->ready) cpufreq_driver->ready(policy); + if (IS_ENABLED(CONFIG_CPU_THERMAL) && + cpufreq_driver->flags & CPUFREQ_IS_COOLING_DEV) + policy->cdev = of_cpufreq_cooling_register(policy); + pr_debug("initialization complete\n"); return 0; @@ -1403,6 +1408,12 @@ static int cpufreq_offline(unsigned int cpu) goto unlock; } + if (IS_ENABLED(CONFIG_CPU_THERMAL) && + cpufreq_driver->flags & CPUFREQ_IS_COOLING_DEV) { + cpufreq_cooling_unregister(policy->cdev); + policy->cdev = NULL; + } + if (cpufreq_driver->stop_cpu) cpufreq_driver->stop_cpu(policy); diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index bd7fbd6a4478..6078eb07a7e4 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -151,6 +151,9 @@ struct cpufreq_policy { /* For cpufreq driver's internal use */ void *driver_data; + + /* Pointer to the cooling device if used for thermal mitigation */ + struct thermal_cooling_device *cdev; }; /* Only for ACPI */ @@ -386,6 +389,12 @@ struct cpufreq_driver { */ #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6) +/* + * Set by drivers that want the core to automatically register the cpufreq + * driver as a thermal cooling device. + */ +#define CPUFREQ_IS_COOLING_DEV BIT(7) + int cpufreq_register_driver(struct cpufreq_driver *driver_data); int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);