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.
This sysfs interface will be exported only if the gpio pins are properly
initialized from ACPI/DT.
Signed-off-by: Irina Tirdea <irina.tirdea@xxxxxxxxx>
---
drivers/input/touchscreen/goodix.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 33a7b81..3179767 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -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
};
--
1.9.1
--
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