@@ -530,12 +530,35 @@ static ssize_t goodix_esd_timeout_store(struct device *dev,
return count;
}
+static ssize_t goodix_dump_config_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct goodix_ts_data *ts = dev_get_drvdata(dev);
+ u8 config[GOODIX_CONFIG_MAX_LENGTH];
+ int error, count = 0, i;
+
+ error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA,
+ config, ts->cfg_len);
+ if (error) {
+ dev_warn(&ts->client->dev,
+ "Error reading config (%d)\n", error);
+ return error;
+ }
+
+ for (i = 0; i < ts->cfg_len; i++)
+ count += scnprintf(buf + count, PAGE_SIZE - count, "%02x ",
+ config[i]);
+ return count;
+}
+
/* ESD timeout in ms. Default disabled (0). Recommended 2000 ms. */
static DEVICE_ATTR(esd_timeout, S_IRUGO | S_IWUSR, goodix_esd_timeout_show,
goodix_esd_timeout_store);
+static DEVICE_ATTR(dump_config, S_IRUGO, goodix_dump_config_show, NULL);
static struct attribute *goodix_attrs[] = {
&dev_attr_esd_timeout.attr,
+ &dev_attr_dump_config.attr,
NULL
};
Goodix devices have a configuration information register area that specify various parameters for the device. The configuration information has a specific format described in the Goodix datasheet. It includes X/Y resolution, maximum supported touch points, interrupt flags, various sesitivity factors and settings for advanced features (like gesture recognition). Export a sysfs interface that would allow reading the configuration information. The default device configuration can be used as a starting point for creating a valid configuration firmware used by the device at init time to update its configuration. Signed-off-by: Irina Tirdea <irina.tirdea@intel.com> --- drivers/input/touchscreen/goodix.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)