[v1,18/63] Input: atmel_mxt_ts - add config checksum attribute to sysfs
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Message ID 20190816083257.18546-4-jiada_wang@mentor.com
State New
Headers show
Series
  • Untitled series #406675
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Commit Message

Jiada Wang Aug. 16, 2019, 8:32 a.m. UTC
From: 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>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Patch
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diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 4f335c3da994..a4f8364ecca9 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -3122,6 +3122,15 @@  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)
@@ -3475,12 +3484,14 @@  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
 };