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[v11,25/56] Input: atmel_mxt_ts - add config checksum attribute to sysfs

Message ID 20200508055656.96389-26-jiada_wang@mentor.com (mailing list archive)
State New
Headers show
Series atmel_mxt_ts misc | expand

Commit Message

Wang, Jiada May 8, 2020, 5:56 a.m. UTC
From: karl tsou <karl.funlab@gmail.com>

Add config checksum attribute to sysfs

Signed-off-by: karl tsou <karl.funlab@gmail.com>
Signed-off-by: Nick Dyer <nick.dyer@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_davis@mentor.com>
[jiada: Add commit description
	Rename mxt_config_crc_show to config_crc_show
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
 drivers/input/touchscreen/atmel_mxt_ts.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
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diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index affd2bf32969..780850343089 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3124,6 +3124,15 @@  static int mxt_configure_objects(struct mxt_data *data,
 	return error;
+/* Configuration crc check sum is returned as hex xxxxxx */
+static ssize_t 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 fw_version_show(struct device *dev,
 			       struct device_attribute *attr, char *buf)
@@ -3477,12 +3486,14 @@  static DEVICE_ATTR_RO(fw_version);
 static DEVICE_ATTR_RO(hw_version);
 static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
 static DEVICE_ATTR_WO(update_cfg);
+static DEVICE_ATTR_RO(config_crc);
 static struct attribute *mxt_attrs[] = {
+	&dev_attr_config_crc.attr,