[03/30] Thermal: set upper and lower limits

Message ID	9d99842f99d847191ebd0c28469d2c70fcc5bf9e.1349761836.git.len.brown@intel.com (mailing list archive)
State	Accepted, archived
Headers	show Return-Path: <linux-acpi-owner@vger.kernel.org> From: Len Brown <lenb@kernel.org> To: linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Zhang Rui <rui.zhang@intel.com> Subject: [PATCH 03/30] Thermal: set upper and lower limits Date: Tue, 9 Oct 2012 01:53:53 -0400 Message-Id: <9d99842f99d847191ebd0c28469d2c70fcc5bf9e.1349761836.git.len.brown@intel.com> In-Reply-To: <1349762060-25334-1-git-send-email-lenb@kernel.org> References: <1349762060-25334-1-git-send-email-lenb@kernel.org> In-Reply-To: <e3f25e6e5836c4790fbe395ff42e241f372d859d.1349761836.git.len.brown@intel.com> References: <e3f25e6e5836c4790fbe395ff42e241f372d859d.1349761836.git.len.brown@intel.com> Reply-To: Len Brown <lenb@kernel.org> Organization: Intel Open Source Technology Center Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk

diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt index c087dbc..ca1a1a3 100644 --- a/Documentation/thermal/sysfs-api.txt +++ b/Documentation/thermal/sysfs-api.txt @@ -84,7 +84,8 @@ temperature) and throttle appropriate devices. 1.3 interface for binding a thermal zone device with a thermal cooling device 1.3.1 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, - int trip, struct thermal_cooling_device *cdev); + int trip, struct thermal_cooling_device *cdev, + unsigned long upper, unsigned long lower); This interface function bind a thermal cooling device to the certain trip point of a thermal zone device. @@ -93,6 +94,12 @@ temperature) and throttle appropriate devices. cdev: thermal cooling device trip: indicates which trip point the cooling devices is associated with in this thermal zone. + upper:the Maximum cooling state for this trip point. + THERMAL_NO_LIMIT means no upper limit, + and the cooling device can be in max_state. + lower:the Minimum cooling state can be used for this trip point. + THERMAL_NO_LIMIT means no lower limit, + and the cooling device can be in cooling state 0. 1.3.2 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, int trip, struct thermal_cooling_device *cdev); diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 9fe90e9..d7ef69d 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -729,11 +729,9 @@ static int thermal_notify(struct thermal_zone_device *thermal, int trip, return 0; } -typedef int (*cb)(struct thermal_zone_device *, int, - struct thermal_cooling_device *); static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev, - cb action) + bool bind) { struct acpi_device *device = cdev->devdata; struct acpi_thermal *tz = thermal->devdata; @@ -757,11 +755,19 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, i++) { handle = tz->trips.passive.devices.handles[i]; status = acpi_bus_get_device(handle, &dev); - if (ACPI_SUCCESS(status) && (dev == device)) { - result = action(thermal, trip, cdev); - if (result) - goto failed; - } + if (ACPI_FAILURE(status) || dev != device) + continue; + if (bind) + result = + thermal_zone_bind_cooling_device + (thermal, trip, cdev, + THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); + else + result = + thermal_zone_unbind_cooling_device + (thermal, trip, cdev); + if (result) + goto failed; } } @@ -774,11 +780,17 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, j++) { handle = tz->trips.active[i].devices.handles[j]; status = acpi_bus_get_device(handle, &dev); - if (ACPI_SUCCESS(status) && (dev == device)) { - result = action(thermal, trip, cdev); - if (result) - goto failed; - } + if (ACPI_FAILURE(status) || dev != device) + continue; + if (bind) + result = thermal_zone_bind_cooling_device + (thermal, trip, cdev, + THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); + else + result = thermal_zone_unbind_cooling_device + (thermal, trip, cdev); + if (result) + goto failed; } } @@ -786,7 +798,14 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, handle = tz->devices.handles[i]; status = acpi_bus_get_device(handle, &dev); if (ACPI_SUCCESS(status) && (dev == device)) { - result = action(thermal, -1, cdev); + if (bind) + result = thermal_zone_bind_cooling_device + (thermal, -1, cdev, + THERMAL_NO_LIMIT, + THERMAL_NO_LIMIT); + else + result = thermal_zone_unbind_cooling_device + (thermal, -1, cdev); if (result) goto failed; } @@ -800,16 +819,14 @@ static int acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev) { - return acpi_thermal_cooling_device_cb(thermal, cdev, - thermal_zone_bind_cooling_device); + return acpi_thermal_cooling_device_cb(thermal, cdev, true); } static int acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev) { - return acpi_thermal_cooling_device_cb(thermal, cdev, - thermal_zone_unbind_cooling_device); + return acpi_thermal_cooling_device_cb(thermal, cdev, false); } static const struct thermal_zone_device_ops acpi_thermal_zone_ops = { diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c index 39abb15..a207466 100644 --- a/drivers/platform/x86/acerhdf.c +++ b/drivers/platform/x86/acerhdf.c @@ -329,7 +329,8 @@ static int acerhdf_bind(struct thermal_zone_device *thermal, if (cdev != cl_dev) return 0; - if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) { + if (thermal_zone_bind_cooling_device(thermal, 0, cdev, + THERMAL_NO_LIMIT, THERMAL_NO_LIMIT)) { pr_err("error binding cooling dev\n"); return -EINVAL; } diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index d78c6dc..b04fe2c 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -315,8 +315,9 @@ passive_store(struct device *dev, struct device_attribute *attr, if (!strncmp("Processor", cdev->type, sizeof("Processor"))) thermal_zone_bind_cooling_device(tz, - THERMAL_TRIPS_NONE, - cdev); + THERMAL_TRIPS_NONE, cdev, + THERMAL_NO_LIMIT, + THERMAL_NO_LIMIT); } mutex_unlock(&thermal_list_lock); if (!tz->passive_delay) @@ -801,7 +802,8 @@ static void thermal_zone_device_check(struct work_struct *work) */ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, int trip, - struct thermal_cooling_device *cdev) + struct thermal_cooling_device *cdev, + unsigned long upper, unsigned long lower) { struct thermal_cooling_device_instance *dev; struct thermal_cooling_device_instance *pos; @@ -825,6 +827,15 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, if (tz != pos1 || cdev != pos2) return -EINVAL; + cdev->ops->get_max_state(cdev, &max_state); + + /* lower default 0, upper default max_state */ + lower = lower == THERMAL_NO_LIMIT ? 0 : lower; + upper = upper == THERMAL_NO_LIMIT ? max_state : upper; + + if (lower > upper || upper > max_state) + return -EINVAL; + dev = kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); if (!dev) @@ -832,10 +843,8 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, dev->tz = tz; dev->cdev = cdev; dev->trip = trip; - - cdev->ops->get_max_state(cdev, &max_state); - dev->upper = max_state; - dev->lower = 0; + dev->upper = upper; + dev->lower = lower; result = get_idr(&tz->idr, &tz->lock, &dev->id); if (result) diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 4b94a61..5946a3b 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -75,6 +75,8 @@ struct thermal_cooling_device_ops { int (*set_cur_state) (struct thermal_cooling_device *, unsigned long); }; +#define THERMAL_NO_LIMIT -1UL /* no upper/lower limit requirement */ + #define THERMAL_TRIPS_NONE -1 #define THERMAL_MAX_TRIPS 12 #define THERMAL_NAME_LENGTH 20 @@ -157,7 +159,8 @@ struct thermal_zone_device *thermal_zone_device_register(const char *, int, int, void thermal_zone_device_unregister(struct thermal_zone_device *); int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, - struct thermal_cooling_device *); + struct thermal_cooling_device *, + unsigned long, unsigned long); int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *); void thermal_zone_device_update(struct thermal_zone_device *);

[03/30] Thermal: set upper and lower limits

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