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HID: ll_driver: Extend the interface with idle requests

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Some drivers send the idle command directly to underlying device,
creating an unwanted dependency on the underlying transport layer.
This patch adds hid_hw_idle() to the interface, thereby removing
usbhid from the lion share of the drivers.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires
2013-02-27 16:38:17 +01:00
committed by Jiri Kosina
parent 777d4bb39a
commit 9684819b5a
2 changed files with 34 additions and 0 deletions
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19
include/linux/hid.h
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@@ -664,6 +664,7 @@ struct hid_driver {
* shouldn't allocate anything to not leak memory
* @request: send report request to device (e.g. feature report)
* @wait: wait for buffered io to complete (send/recv reports)
* @idle: send idle request to device
*/
struct hid_ll_driver {
int (*start)(struct hid_device *hdev);
@@ -683,6 +684,7 @@ struct hid_ll_driver {
struct hid_report *report, int reqtype);
int (*wait)(struct hid_device *hdev);
int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
};
@@ -906,6 +908,23 @@ static inline void hid_hw_request(struct hid_device *hdev,
hdev->ll_driver->request(hdev, report, reqtype);
}
/**
* hid_hw_idle - send idle request to device
*
* @hdev: hid device
* @report: report to control
* @idle: idle state
* @reqtype: hid request type
*/
static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
int reqtype)
{
if (hdev->ll_driver->idle)
return hdev->ll_driver->idle(hdev, report, idle, reqtype);
return 0;
}
/**
* hid_hw_wait - wait for buffered io to complete
*