@@ -39,6 +39,7 @@ struct goodix_ts_data {
bool rotated_screen;
struct gpio_desc *gpiod_int;
struct gpio_desc *gpiod_rst;
+ int cfg_len;
};
#define GOODIX_MAX_HEIGHT 4096
@@ -48,6 +49,8 @@ struct goodix_ts_data {
#define GOODIX_MAX_CONTACTS 10
#define GOODIX_CONFIG_MAX_LENGTH 240
+#define GOODIX_CONFIG_911_LENGTH 186
+#define GOODIX_CONFIG_967_LENGTH 228
/* Register defines */
#define GOODIX_READ_COOR_ADDR 0x814E
@@ -142,6 +145,23 @@ static int goodix_i2c_read(struct i2c_client *client,
return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0);
}
+static int goodix_get_cfg_len(u16 id)
+{
+ switch (id) {
+ case 911:
+ case 9271:
+ case 9110:
+ case 927:
+ case 928:
+ return GOODIX_CONFIG_911_LENGTH;
+ case 912:
+ case 967:
+ return GOODIX_CONFIG_967_LENGTH;
+ default:
+ return GOODIX_CONFIG_MAX_LENGTH;
+ }
+}
+
static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
{
int touch_num;
@@ -353,8 +373,7 @@ static void goodix_read_config(struct goodix_ts_data *ts)
int error;
error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA,
- config,
- GOODIX_CONFIG_MAX_LENGTH);
+ config, ts->cfg_len);
if (error) {
dev_warn(&ts->client->dev,
"Error reading config (%d), using defaults\n",
@@ -521,6 +540,8 @@ static int goodix_ts_probe(struct i2c_client *client,
return error;
}
+ ts->cfg_len = goodix_get_cfg_len(id_info);
+
error = goodix_get_gpio_config(ts, id);
if (error)
return error;
Each of the Goodix devices supported by this driver has a fixed size for the configuration information registers. The size varies depending on the device and is specified in the datasheet. Use the proper configuration length as specified in the datasheet for each device model, so we do not read more than the actual size of the configuration registers. Signed-off-by: Irina Tirdea <irina.tirdea@intel.com> --- drivers/input/touchscreen/goodix.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-)