Add a sysfs attribute to query the type of the touchscreen device.
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
---
.../ABI/testing/sysfs-driver-input-exc3000 | 9 +++++++++
drivers/input/touchscreen/exc3000.c | 17 +++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-driver-input-exc3000 b/Documentation/ABI/testing/sysfs-driver-input-exc3000
index cd7c578aef2c..704434b277b0 100644
--- a/Documentation/ABI/testing/sysfs-driver-input-exc3000
+++ b/Documentation/ABI/testing/sysfs-driver-input-exc3000
@@ -15,3 +15,12 @@ Description: Reports the model identification provided by the touchscreen, fo
Access: Read
Valid values: Represented as string
+
+What: /sys/bus/i2c/devices/xxx/type
+Date: Jan 2021
+Contact: linux-input@xxxxxxxxxxxxxxx
+Description: Reports the type identification provided by the touchscreen, for example "PCAP82H80 Series"
+
+ Access: Read
+
+ Valid values: Represented as string
diff --git a/drivers/input/touchscreen/exc3000.c b/drivers/input/touchscreen/exc3000.c
index ae06290a4c45..74ba03dcaaf7 100644
--- a/drivers/input/touchscreen/exc3000.c
+++ b/drivers/input/touchscreen/exc3000.c
@@ -298,9 +298,26 @@ static ssize_t model_show(struct device *dev,
}
static DEVICE_ATTR_RO(model);
+static ssize_t type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct exc3000_data *data = i2c_get_clientdata(client);
+ u8 response[EXC3000_LEN_FRAME];
+ int ret;
+
+ ret = exc3000_vendor_data_request(data, (u8[]){'F'}, 1, response, 1);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%s\n", &response[1]);
+}
+static DEVICE_ATTR_RO(type);
+
static struct attribute *sysfs_attrs[] = {
&dev_attr_fw_version.attr,
&dev_attr_model.attr,
+ &dev_attr_type.attr,
NULL
};
--
2.20.1
