diff mbox series

[v4,3/3] HID: lenovo: Add note about different report numbers

Message ID 20220213214924.32407-4-flokli@flokli.de
State New
Headers show
Series HID: lenovo: Add support for ThinkPad TrackPoint | expand

Commit Message

Florian Klink Feb. 13, 2022, 9:49 p.m. UTC 
From: ValdikSS <iam@valdikss.org.ru>

Signed-off-by: Florian Klink <flokli@flokli.de>
---
 drivers/hid/hid-lenovo.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index e9466ae8a9cb..9dabd6323234 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -487,6 +487,11 @@  static int lenovo_send_cmd_cptkbd(struct hid_device *hdev,
 	if (!buf)
 		return -ENOMEM;
 
+	/*
+	 * Feature report 0x13 is used for USB,
+	 * output report 0x18 is used for Bluetooth.
+	 * buf[0] is ignored by hid_hw_raw_request.
+	 */
 	buf[0] = 0x18;
 	buf[1] = byte2;
 	buf[2] = byte3;