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Date: Mon, 6 Jul 2020 12:55:35 +0200 From: Daniel Lezcano <daniel.lezcano@...aro.org> To: daniel.lezcano@...aro.org, rui.zhang@...el.com Cc: srinivas.pandruvada@...ux.intel.com, rkumbako@...eaurora.org, amit.kucheria@...aro.org, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org Subject: [PATCH v4 1/4] thermal: core: Add helpers to browse the cdev, tz and governor list The cdev, tz and governor list, as well as their respective locks are statically defined in the thermal_core.c file. In order to give a sane access to these list, like browsing all the thermal zones or all the cooling devices, let's define a set of helpers where we pass a callback as a parameter to be called for each thermal entity. We keep the self-encapsulation and ensure the locks are correctly taken when looking at the list. Acked-by: Zhang Rui <rui.zhang@...el.com> Reviewed-by: Amit Kucheria <amit.kucheria@...aro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org> --- drivers/thermal/thermal_core.c | 51 ++++++++++++++++++++++++++++++++++ drivers/thermal/thermal_core.h | 9 ++++++ 2 files changed, 60 insertions(+) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index b71196eaf90e..9caaa0b6d662 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -617,6 +617,57 @@ void thermal_zone_device_rebind_exception(struct thermal_zone_device *tz, mutex_unlock(&thermal_list_lock); } +int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *), + void *data) +{ + struct thermal_governor *gov; + int ret = 0; + + mutex_lock(&thermal_governor_lock); + list_for_each_entry(gov, &thermal_governor_list, governor_list) { + ret = cb(gov, data); + if (ret) + break; + } + mutex_unlock(&thermal_governor_lock); + + return ret; +} + +int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *, + void *), void *data) +{ + struct thermal_cooling_device *cdev; + int ret = 0; + + mutex_lock(&thermal_list_lock); + list_for_each_entry(cdev, &thermal_cdev_list, node) { + ret = cb(cdev, data); + if (ret) + break; + } + mutex_unlock(&thermal_list_lock); + + return ret; +} + +int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *), + void *data) +{ + struct thermal_zone_device *tz; + int ret = 0; + + mutex_lock(&thermal_list_lock); + list_for_each_entry(tz, &thermal_tz_list, node) { + ret = cb(tz, data); + if (ret) + break; + } + mutex_unlock(&thermal_list_lock); + + return ret; +} + void thermal_zone_device_unbind_exception(struct thermal_zone_device *tz, const char *cdev_type, size_t size) { diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h index c95689586e19..71d88dac0791 100644 --- a/drivers/thermal/thermal_core.h +++ b/drivers/thermal/thermal_core.h @@ -41,6 +41,15 @@ extern struct thermal_governor *__governor_thermal_table_end[]; __governor < __governor_thermal_table_end; \ __governor++) +int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *), + void *); + +int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *, + void *), void *); + +int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *), + void *thermal_governor); + struct thermal_attr { struct device_attribute attr; char name[THERMAL_NAME_LENGTH]; -- 2.17.1
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