From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Zhang Rui <rui.zhang@intel.com>
Cc: Matthew Garrett <mjg@redhat.com>, Len Brown <lenb@kernel.org>,
R Durgadoss <durgadoss.r@intel.com>,
Eduardo Valentin <eduardo.valentin@ti.com>,
Amit Kachhap <amit.kachhap@linaro.org>, Wei Ni <wni@nvidia.com>,
linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org
Subject: Re: [PATCH RESEND 06/16] Thermal: set upper and lower limits
Date: Wed, 25 Jul 2012 22:14:42 +0200 [thread overview]
Message-ID: <201207252214.43030.rjw@sisk.pl> (raw)
In-Reply-To: <1343182273-32096-7-git-send-email-rui.zhang@intel.com>
On Wednesday, July 25, 2012, Zhang Rui wrote:
> set upper and lower limits when binding
> a thermal cooling device to a thermal zone device.
>
> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
> ---
> Documentation/thermal/sysfs-api.txt | 9 +++++-
> drivers/acpi/thermal.c | 53 +++++++++++++++++++++++------------
> drivers/platform/x86/acerhdf.c | 3 +-
> drivers/thermal/thermal_sys.c | 23 ++++++++++-----
> include/linux/thermal.h | 5 +++-
> 5 files changed, 65 insertions(+), 28 deletions(-)
>
> 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 8275e7b..0154eac 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -727,11 +727,9 @@ 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;
> @@ -755,11 +753,19 @@ 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;
> }
> }
>
> @@ -772,11 +778,17 @@ 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;
> }
> }
>
> @@ -784,7 +796,14 @@ 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;
> }
> @@ -798,16 +817,14 @@ 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, 1);
That should be
+ return acpi_thermal_cooling_device_cb(thermal, cdev, true);
I suppose.
> }
>
> 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, 0);
And that should be
+ 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 008e2eb..62b4279 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 cfc8d90..a43b12c 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(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 *);
>
Looks good apart from the above nits (arguably minor).
Thanks,
Rafael
next prev parent reply other threads:[~2012-07-25 20:08 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-25 2:10 [PATCH RESEND 00/16] Thermal: generic thermal layer enhancement Zhang Rui
2012-07-25 2:10 ` [PATCH RESEND 01/16] Thermal: Make Thermal trip points writeable Zhang Rui
2012-07-25 3:18 ` Len Brown
2012-07-25 2:10 ` [PATCH RESEND 02/16] Thermal: Add Hysteresis attributes Zhang Rui
2012-07-25 3:19 ` Len Brown
2012-07-25 2:11 ` [PATCH RESEND 03/16] Thermal: Documentation update Zhang Rui
2012-07-25 2:11 ` [PATCH RESEND 04/16] Thermal: Introduce multiple cooling states support Zhang Rui
2012-07-25 20:06 ` Rafael J. Wysocki
2012-07-26 2:33 ` Zhang Rui
2012-07-25 2:11 ` [PATCH RESEND 05/16] Thermal: Introduce cooling states range support Zhang Rui
2012-07-25 20:08 ` Rafael J. Wysocki
2012-08-08 12:07 ` Valentin, Eduardo
2012-07-25 2:11 ` [PATCH RESEND 06/16] Thermal: set upper and lower limits Zhang Rui
2012-07-25 20:14 ` Rafael J. Wysocki [this message]
2012-08-08 12:50 ` Valentin, Eduardo
2012-07-25 2:11 ` [PATCH RESEND 07/16] Thermal: Introduce .get_trend() callback Zhang Rui
2012-07-25 20:19 ` Rafael J. Wysocki
2012-07-26 2:21 ` Zhang Rui
2012-07-25 2:11 ` [PATCH RESEND 08/16] Thermal: Remove tc1/tc2 in generic thermal layer Zhang Rui
2012-07-25 20:24 ` Rafael J. Wysocki
2012-07-26 2:23 ` Zhang Rui
2012-07-25 2:11 ` [PATCH RESEND 09/16] Thermal: Introduce thermal_zone_trip_update() Zhang Rui
2012-07-25 20:31 ` Rafael J. Wysocki
2012-07-26 2:25 ` Zhang Rui
2012-07-25 2:11 ` [PATCH RESEND 10/16] Thermal: rename structure thermal_cooling_device_instance to thermal_instance Zhang Rui
2012-07-25 20:32 ` Rafael J. Wysocki
2012-07-25 2:11 ` [PATCH RESEND 11/16] Thermal: Rename thermal_zone_device.cooling_devices Zhang Rui
2012-07-25 20:33 ` Rafael J. Wysocki
2012-07-25 2:11 ` [PATCH RESEND 12/16] Thermal: Rename thermal_instance.node to thermal_instance.tz_node Zhang Rui
2012-07-25 20:34 ` Rafael J. Wysocki
2012-07-25 2:11 ` [PATCH RESEND 13/16] Thermal: List thermal_instance in thermal_cooling_device Zhang Rui
2012-07-25 20:35 ` Rafael J. Wysocki
2012-07-25 2:11 ` [PATCH RESEND 14/16] Thermal: Introduce simple arbitrator for setting device cooling state Zhang Rui
2012-07-25 20:38 ` Rafael J. Wysocki
2012-07-25 2:11 ` [PATCH RESEND 15/16] Thermal: Unify the code for both active and passive cooling Zhang Rui
2012-07-25 20:41 ` Rafael J. Wysocki
2012-08-09 8:26 ` Valentin, Eduardo
2012-08-09 8:32 ` Zhang Rui
2012-07-25 2:11 ` [PATCH RESEND 16/16] Thermal: Introduce locking for cdev.thermal_instances list Zhang Rui
2012-07-25 18:54 ` Rafael J. Wysocki
2012-07-26 2:32 ` Zhang Rui
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