Input: cy8ctmg110 - add fuzz to ABS_X and ABS_Y to remove jitter

[cascardo/linux.git] / drivers / input / touchscreen / cy8ctmg110_ts.c

diff --git a/drivers/input/touchscreen/cy8ctmg110_ts.c b/drivers/input/touchscreen/cy8ctmg110_ts.c
index 4eb7df0..d0c3a72 100644 (file)
--- a/drivers/input/touchscreen/cy8ctmg110_ts.c
+++ b/drivers/input/touchscreen/cy8ctmg110_ts.c
@@ -75,7 +75,7 @@ static int cy8ctmg110_write_regs(struct cy8ctmg110 *tsc, unsigned char reg,
                unsigned char len, unsigned char *value)
 {
        struct i2c_client *client = tsc->client;
-       unsigned int ret;
+       int ret;
        unsigned char i2c_data[6];
 
        BUG_ON(len > 5);
@@ -86,7 +86,7 @@ static int cy8ctmg110_write_regs(struct cy8ctmg110 *tsc, unsigned char reg,
        ret = i2c_master_send(client, i2c_data, len + 1);
        if (ret != 1) {
                dev_err(&client->dev, "i2c write data cmd failed\n");
-               return ret;
+               return ret ? ret : -EIO;
        }
 
        return 0;
@@ -96,7 +96,7 @@ static int cy8ctmg110_read_regs(struct cy8ctmg110 *tsc,
                unsigned char *data, unsigned char len, unsigned char cmd)
 {
        struct i2c_client *client = tsc->client;
-       unsigned int ret;
+       int ret;
        struct i2c_msg msg[2] = {
                /* first write slave position to i2c devices */
                { client->addr, 0, 1, &cmd },
@@ -206,9 +206,9 @@ static int __devinit cy8ctmg110_probe(struct i2c_client *client,
        input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 
        input_set_abs_params(input_dev, ABS_X,
-                       CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 0, 0);
+                       CY8CTMG110_X_MIN, CY8CTMG110_X_MAX, 4, 0);
        input_set_abs_params(input_dev, ABS_Y,
-                       CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 0, 0);
+                       CY8CTMG110_Y_MIN, CY8CTMG110_Y_MAX, 4, 0);
 
        if (ts->reset_pin) {
                err = gpio_request(ts->reset_pin, NULL);