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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-12-07 23:02:48 -0800 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2010-12-08 14:35:14 +0100 |
commit | 5bea7660bba973dc5e8e9d92b11fb1dd5b524ebf (patch) | |
tree | 511ae632c2d2c22d94956ed2d236bd8654d27ff0 /include/linux/hid.h | |
parent | 33d6eb570b1f3fe5ba93cef465c5be66535c2c9a (diff) | |
download | linux-3.10-5bea7660bba973dc5e8e9d92b11fb1dd5b524ebf.tar.gz linux-3.10-5bea7660bba973dc5e8e9d92b11fb1dd5b524ebf.tar.bz2 linux-3.10-5bea7660bba973dc5e8e9d92b11fb1dd5b524ebf.zip |
HID: add hid_hw_open/close/power() handlers
Instead of exposing the guts of hid->ll_driver relationship to HID
sub-drivers provide these helpers to encapsulate the details.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/linux/hid.h')
-rw-r--r-- | include/linux/hid.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/linux/hid.h b/include/linux/hid.h index bb0f56f5c01..e2af195d8b4 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -820,6 +820,49 @@ static inline void hid_hw_stop(struct hid_device *hdev) hdev->ll_driver->stop(hdev); } +/** + * hid_hw_open - signal underlaying HW to start delivering events + * + * @hdev: hid device + * + * Tell underlying HW to start delivering events from the device. + * This function should be called sometime after successful call + * to hid_hiw_start(). + */ +static inline int __must_check hid_hw_open(struct hid_device *hdev) +{ + return hdev->ll_driver->open(hdev); +} + +/** + * hid_hw_close - signal underlaying HW to stop delivering events + * + * @hdev: hid device + * + * This function indicates that we are not interested in the events + * from this device anymore. Delivery of events may or may not stop, + * depending on the number of users still outstanding. + */ +static inline void hid_hw_close(struct hid_device *hdev) +{ + hdev->ll_driver->close(hdev); +} + +/** + * hid_hw_power - requests underlying HW to go into given power mode + * + * @hdev: hid device + * @level: requested power level (one of %PM_HINT_* defines) + * + * This function requests underlying hardware to enter requested power + * mode. + */ + +static inline int hid_hw_power(struct hid_device *hdev, int level) +{ + return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0; +} + void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size, int interrupt); |