From: Jongpil Jung <jongpil19.jung@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
To backup current config, we can store current config into nvram.
Change-Id: Ibea246526a9e586d89e226cfb058d40829fb2a42
---
drivers/input/touchscreen/atmel_mxt_ts.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index cabe746607fc..cb3a608f60bf 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -2679,6 +2679,23 @@ static int mxt_configure_objects(struct mxt_data *data,
return 0;
}
+static ssize_t mxt_backupnv_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mxt_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ /* Backup non-volatile memory */
+ ret = mxt_write_object(data, MXT_GEN_COMMAND_T6,
+ MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE);
+ if (ret)
+ return ret;
+ msleep(MXT_BACKUP_TIME);
+
+ return count;
+}
+
static ssize_t mxt_calibrate_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
@@ -2953,6 +2970,7 @@ static ssize_t mxt_update_fw_store(struct device *dev,
return count;
}
+static DEVICE_ATTR(backupnv, S_IWUSR, NULL, mxt_backupnv_store);
static DEVICE_ATTR(calibrate, S_IWUSR, NULL, mxt_calibrate_store);
static DEVICE_ATTR(config_csum, S_IRUGO, mxt_config_csum_show, NULL);
static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
@@ -2962,6 +2980,7 @@ static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
static struct attribute *mxt_attrs[] = {
+ &dev_attr_backupnv.attr,
&dev_attr_calibrate.attr,
&dev_attr_config_csum.attr,
&dev_attr_fw_version.attr,
--
2.17.1
