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authorHans de Goede <hdegoede@redhat.com>2021-05-29 18:14:21 +0300
committerJiri Kosina <jkosina@suse.cz>2021-06-25 15:02:58 +0300
commit24e166f43e93de0e9b0a460ecfe4bab1f12212d7 (patch)
tree742acbeb0c903086fc3008ad795c7a15ee40705d /include/linux/hid.h
parent231bc539066760aaa44d46818c85b14ca2f56d9f (diff)
downloadlinux-24e166f43e93de0e9b0a460ecfe4bab1f12212d7.tar.xz
HID: core: Add hid_hw_may_wakeup() function
Add a hid_hw_may_wakeup() function, which is the equivalent of device_may_wakeup() for hid devices. In most cases this just returns device_may_wakeup(hdev->dev.parent), but for some ll-drivers this is not correct. E.g. usb_hid_driver instantiated hid devices have their parent set to the usb-interface to which the usb_hid_driver is bound, but the power/wakeup* sysfs attributes are part of the usb-device, which is the usb-interface's parent. For these special cases a new may_wakeup callback is added to hid_ll_driver, so that ll-drivers can override the default behavior. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/linux/hid.h')
-rw-r--r--include/linux/hid.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 10e922cee4eb..51a4dad3565e 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -800,6 +800,7 @@ struct hid_driver {
* @raw_request: send raw report request to device (e.g. feature report)
* @output_report: send output report to device
* @idle: send idle request to device
+ * @may_wakeup: return if device may act as a wakeup source during system-suspend
*/
struct hid_ll_driver {
int (*start)(struct hid_device *hdev);
@@ -824,6 +825,7 @@ struct hid_ll_driver {
int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
+ bool (*may_wakeup)(struct hid_device *hdev);
};
extern struct hid_ll_driver i2c_hid_ll_driver;
@@ -1150,6 +1152,22 @@ static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
}
/**
+ * hid_may_wakeup - return if the hid device may act as a wakeup source during system-suspend
+ *
+ * @hdev: hid device
+ */
+static inline bool hid_hw_may_wakeup(struct hid_device *hdev)
+{
+ if (hdev->ll_driver->may_wakeup)
+ return hdev->ll_driver->may_wakeup(hdev);
+
+ if (hdev->dev.parent)
+ return device_may_wakeup(hdev->dev.parent);
+
+ return false;
+}
+
+/**
* hid_hw_wait - wait for buffered io to complete
*
* @hdev: hid device