diff options
| author |   Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2013-09-18 18:13:00 +0100 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2013-10-01 16:19:08 +0100 |
| commit | 1df3a401154add23826d714c808204633b3b1c31 (patch) | |
| tree | d229c451092f2a3b507beddb853e8dc83fb7b046 /include/linux/hid-sensor-hub.h | |
| parent | staging: lustre: fix bug with LL_MRF_RETURN in loop_make_request (diff) | |
| download | linux-dev-1df3a401154add23826d714c808204633b3b1c31.tar.xz linux-dev-1df3a401154add23826d714c808204633b3b1c31.zip | |
HID: Delay opening HID device
Don't call hid_open_device till there is actually an user. This saves
power by not opening underlying transport for HID. Also close device
if there are no active mfd client using HID sensor hub.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'include/linux/hid-sensor-hub.h')
| -rw-r--r-- | include/linux/hid-sensor-hub.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h index 32ba45158d39..a265af294ea4 100644 --- a/include/linux/hid-sensor-hub.h +++ b/include/linux/hid-sensor-hub.h @@ -47,11 +47,13 @@ struct hid_sensor_hub_attribute_info { * @hdev: Stores the hid instance. * @vendor_id: Vendor id of hub device. * @product_id: Product id of hub device. + * @ref_cnt: Number of MFD clients have opened this device */ struct hid_sensor_hub_device { struct hid_device *hdev; u32 vendor_id; u32 product_id; + int ref_cnt; }; /** @@ -74,6 +76,22 @@ struct hid_sensor_hub_callbacks { void *priv); }; +/** +* sensor_hub_device_open() - Open hub device +* @hsdev: Hub device instance. +* +* Used to open hid device for sensor hub. +*/ +int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev); + +/** +* sensor_hub_device_clode() - Close hub device +* @hsdev: Hub device instance. +* +* Used to clode hid device for sensor hub. +*/ +void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev); + /* Registration functions */ /** |