Input: edt-ft5x06 - get/set M12 report rate by sysfs

Add support for reading/writing scan rate (SC) register for M12 by
sysfs. The register value is equal to the SC (Hz), unlike M06, where
instead it is equal to SC / 10.

Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Tested-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://lore.kernel.org/r/20220621123937.1330389-3-dario.binacchi@amarulasolutions.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index bb2e1cbffba73aabd77ee2489d29fcf3b11ee22b..77f061af5c61a24e45f579c392dde36447d00003 100644 (file)
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -47,6 +47,8 @@
 #define M09_REGISTER_NUM_X             0x94
 #define M09_REGISTER_NUM_Y             0x95
 
+#define M12_REGISTER_REPORT_RATE       0x88
+
 #define EV_REGISTER_THRESHOLD          0x40
 #define EV_REGISTER_GAIN               0x41
 #define EV_REGISTER_OFFSET_Y           0x45
@@ -523,9 +525,9 @@ static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
 /* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */
 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
                M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255);
-/* m06: range 3 to 14, m12: (0x64: 100Hz) */
+/* m06: range 3 to 14, m12: range 1 to 255 */
 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
-               NO_REGISTER, NO_REGISTER, 0, 255);
+               M12_REGISTER_REPORT_RATE, NO_REGISTER, 0, 255);
 
 static struct attribute *edt_ft5x06_attrs[] = {
        &edt_ft5x06_attr_gain.dattr.attr,
@@ -1030,7 +1032,8 @@ static void edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
        case EDT_M09:
        case EDT_M12:
                reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
-               reg_addr->reg_report_rate = NO_REGISTER;
+               reg_addr->reg_report_rate = tsdata->version == EDT_M12 ?
+                       M12_REGISTER_REPORT_RATE : NO_REGISTER;
                reg_addr->reg_gain = M09_REGISTER_GAIN;
                reg_addr->reg_offset = M09_REGISTER_OFFSET;
                reg_addr->reg_offset_x = NO_REGISTER;