It's useful for checking the config version that is currently installed
on the device.
The code is taken from downstream maXTouch_linux tree.
Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 05de92c0293b..41a3d4df3ebd 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3002,16 +3002,27 @@ static ssize_t mxt_update_fw_store(struct device *dev,
return count;
}
+/* Configuration crc check sum is returned as hex xxxxxx */
+static ssize_t mxt_config_crc_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct mxt_data *data = dev_get_drvdata(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "%06x\n", data->config_crc);
+}
+
static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
+static DEVICE_ATTR(config_crc, S_IRUGO, mxt_config_crc_show, NULL);
static struct attribute *mxt_attrs[] = {
&dev_attr_fw_version.attr,
&dev_attr_hw_version.attr,
&dev_attr_object.attr,
&dev_attr_update_fw.attr,
+ &dev_attr_config_crc.attr,
NULL
};
--
2.17.1
