[PATCH v2 19/49] Input: atmel_mxt_ts - add config checksum attribute to sysfs

[Jiada Wang]

From: karl tsou <karl.fun...@gmail.com>

Signed-off-by: Nick Dyer <nick.d...@itdev.co.uk>
(cherry picked from ndyer/linux/for-upstream commit 
03477477ddbe5dcad42853ab3f84166a8f807acf)
[gdavis: Forward port and fix conflicts.]
Signed-off-by: George G. Davis <george_da...@mentor.com>
Signed-off-by: Jiada Wang <jiada_w...@mentor.com>
---
 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 923ceb5118c5..77a1f8209cee 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3128,6 +3128,15 @@ static int mxt_configure_objects(struct mxt_data *data,
        return error;
 }
 
+/* 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);
+}
+
 /* Firmware Version is returned as Major.Minor.Build */
 static ssize_t mxt_fw_version_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
@@ -3481,12 +3490,14 @@ 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_cfg, S_IWUSR, NULL, mxt_update_cfg_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_cfg.attr,
+       &dev_attr_config_crc.attr,
        NULL
 };
 
-- 
2.19.2