[PATCH 2/6] Input: elantech - Add the function to get more bytes from register
From: Dave Wang <hidden>
Date: 2019-12-09 03:14:34
Also in:
lkml
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
From: "Dave.Wang" <redacted> Send an Elantech style special command to read three bytes from register. Signed-off-by: Dave Wang <redacted> --- drivers/input/mouse/elantech.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 1f0d914acd78..afb87122b766 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c@@ -89,6 +89,24 @@ static int elantech_ps2_command(struct psmouse *psmouse, return rc; } +/* + * Send an Elantech style special command to read 3 bytes from a register + */ +static int elantech_read_reg_params(struct psmouse *psmouse, unsigned char reg, + unsigned char *param) +{ + int rc = 0; + + if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || + elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || + elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || + elantech_ps2_command(psmouse, NULL, reg) || + elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) + rc = -1; + + return rc; +} + /* * Send an Elantech style special command to read a value from a register */
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2.17.1