Messages in this thread Patch in this message | | | From | "Dave.Wang" <> | Subject | [PATCH 2/6] Input: elantech - Add the function to get more bytes from register | Date | Fri, 6 Dec 2019 11:27:29 +0800 |
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Send an Elantech style special command to read three bytes from register.
Signed-off-by: Dave Wang <dave.wang@emc.com.tw> --- 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 */ -- 2.17.1
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