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HID: add hid_hw_open/close/power() handlers

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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>
This commit is contained in:
Dmitry Torokhov 2010-12-07 23:02:48 -08:00 • committed by Jiri Kosina
parent 33d6eb570b
commit 5bea7660bb
5 changed files with 68 additions and 34 deletions
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43
include/linux/hid.h
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@ -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);