On 二, 2012-06-12 at 12:52 +0300, Eduardo Valentin wrote:
> Hello Rui,
>
> On Mon, Jun 11, 2012 at 11:20:01AM +0800, 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@xxxxxxxxx>
> > ---
> > drivers/acpi/thermal.c | 34 ++++++++++++++++++++++++----------
> > drivers/platform/x86/acerhdf.c | 2 +-
> > drivers/thermal/thermal_sys.c | 20 ++++++++++++++------
> > include/linux/thermal.h | 3 ++-
> > 4 files changed, 41 insertions(+), 18 deletions(-)
> >
> > Index: rtd3/drivers/thermal/thermal_sys.c
> > ===================================================================
> > --- rtd3.orig/drivers/thermal/thermal_sys.c
> > +++ rtd3/drivers/thermal/thermal_sys.c
> > @@ -248,7 +248,7 @@ passive_store(struct device *dev, struct
> > sizeof("Processor")))
> > thermal_zone_bind_cooling_device(tz,
> > THERMAL_TRIPS_NONE,
> > - cdev);
> > + cdev, -1, -1);
> > }
> > mutex_unlock(&thermal_list_lock);
> > if (!tz->passive_delay)
> > @@ -760,7 +760,8 @@ static void thermal_zone_device_check(st
> > */
> > int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
> > int trip,
> > - struct thermal_cooling_device *cdev)
> > + struct thermal_cooling_device *cdev,
> > + long upper, long lower)
> > {
> > struct thermal_cooling_device_instance *dev;
> > struct thermal_cooling_device_instance *pos;
> > @@ -784,6 +785,15 @@ int thermal_zone_bind_cooling_device(str
> > if (tz != pos1 || cdev != pos2)
> > return -EINVAL;
> >
> > + cdev->ops->get_max_state(cdev, &max_state);
> > +
> > + /* lower default 0, upper default max_state */
> > + lower = lower < 0 ? 0 : lower;
> > + upper = upper < 0 ? max_state : upper;
> > +
> > + if (lower > upper || upper > max_state)
> > + return -EINVAL;
> > +
>
> From this version of the code, I assume we want to:
> a. Allow cooling binding instances to have ranges overlapping.
yep.
> b. Allow a binding with only one state (lower == upper).
>
yep.
> Is this the expected behavior?
>
yes. :)
thanks,
rui
> > dev =
> > kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL);
> > if (!dev)
> > @@ -791,10 +801,8 @@ int thermal_zone_bind_cooling_device(str
> > dev->tz = tz;
> > dev->cdev = cdev;
> > dev->trip = trip;
> > -
> > - cdev->ops->get_max_state(dev, &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)
> > Index: rtd3/include/linux/thermal.h
> > ===================================================================
> > --- rtd3.orig/include/linux/thermal.h
> > +++ rtd3/include/linux/thermal.h
> > @@ -143,7 +143,8 @@ struct thermal_zone_device *thermal_zone
> > 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 *,
> > + long, 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 *);
> > Index: rtd3/drivers/acpi/thermal.c
> > ===================================================================
> > --- rtd3.orig/drivers/acpi/thermal.c
> > +++ rtd3/drivers/acpi/thermal.c
> > @@ -729,11 +729,9 @@ static int thermal_notify(struct thermal
> > 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)
> > + int bind)
> > {
> > struct acpi_device *device = cdev->devdata;
> > struct acpi_thermal *tz = thermal->devdata;
> > @@ -758,7 +756,14 @@ static int acpi_thermal_cooling_device_c
> > 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 (bind)
> > + result =
> > + thermal_zone_bind_cooling_device(
> > + thermal, trip, cdev, -1, -1);
> > + else
> > + result =
> > + thermal_zone_unbind_cooling_device(
> > + thermal, trip, cdev);
> > if (result)
> > goto failed;
> > }
> > @@ -775,7 +780,13 @@ static int acpi_thermal_cooling_device_c
> > 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 (bind)
> > + result =
> > + thermal_zone_bind_cooling_device(
> > + thermal, trip, cdev, -1, -1);
> > + else
> > + result = thermal_zone_unbind_cooling_device(
> > + thermal, trip, cdev);
> > if (result)
> > goto failed;
> > }
> > @@ -786,7 +797,12 @@ static int acpi_thermal_cooling_device_c
> > 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, -1, -1);
> > + else
> > + result = thermal_zone_unbind_cooling_device(thermal,
> > + -1, cdev);
> > if (result)
> > goto failed;
> > }
> > @@ -800,16 +816,14 @@ 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);
> > }
> >
> > 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);
> > }
> >
> > static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
> > Index: rtd3/drivers/platform/x86/acerhdf.c
> > ===================================================================
> > --- rtd3.orig/drivers/platform/x86/acerhdf.c
> > +++ rtd3/drivers/platform/x86/acerhdf.c
> > @@ -329,7 +329,7 @@ static int acerhdf_bind(struct thermal_z
> > if (cdev != cl_dev)
> > return 0;
> >
> > - if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) {
> > + if (thermal_zone_bind_cooling_device(thermal, 0, cdev, -1, -1)) {
> > pr_err("error binding cooling dev\n");
> > return -EINVAL;
> > }
> >
> >
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