[PATCH v2 3/7] Input: synaptics - do not retrieve the board id on old firmwares
From: Benjamin Tissoires <hidden>
Date: 2015-02-06 20:04:50
Also in:
lkml
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
The board id capability has been added in firmware 7.5. Cc: stable@vger.kernel.org Signed-off-by: Benjamin Tissoires <redacted> --- v2: - brand new drivers/input/mouse/synaptics.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index a033fc7..d7b2e93 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c@@ -253,6 +253,10 @@ static int synaptics_board_id(struct psmouse *psmouse) struct synaptics_data *priv = psmouse->private; unsigned char bid[3]; + /* firmwares prior 7.5 have no board_id encoded */ + if (SYN_ID_FULL(priv->identity) < 0x705) + return 0; + if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid)) return -1; priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
--
2.1.0