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Input: melfas_mip4 - add hw_version sysfs attribute 

Add hw_version sysfs attribute for retrieving hardware information
from firmware.

Signed-off-by: Sangwon Jee <jeesw@melfas.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Sangwon Jee 2016-03-16 12:33:05 -07:00 committed by Dmitry Torokhov
parent 4d2508a559
commit 9aa40426a4
1 changed files with 27 additions and 1 deletions
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28
drivers/input/touchscreen/melfas_mip4.c
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@ -1310,8 +1310,34 @@ static ssize_t mip4_sysfs_read_fw_version(struct device *dev,
static DEVICE_ATTR(fw_version, S_IRUGO, mip4_sysfs_read_fw_version, NULL);
static ssize_t mip4_sysfs_read_hw_version(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct mip4_ts *ts = i2c_get_clientdata(client);
size_t count;
/* Take lock to prevent racing with firmware update */
mutex_lock(&ts->input->mutex);
/*
* product_name shows the name or version of the hardware
* paired with current firmware in the chip.
*/
count = snprintf(buf, PAGE_SIZE, "%.*s\n",
(int)sizeof(ts->product_name), ts->product_name);
mutex_unlock(&ts->input->mutex);
return count;
}
static DEVICE_ATTR(hw_version, S_IRUGO, mip4_sysfs_read_hw_version, NULL);
static struct attribute *mip4_attrs[] = {
&dev_attr_fw_version.attr,
&dev_attr_hw_version.attr,
&dev_attr_update_fw.attr,
NULL,
};
@ -1512,6 +1538,6 @@ static struct i2c_driver mip4_driver = {
module_i2c_driver(mip4_driver);
MODULE_DESCRIPTION("MELFAS MIP4 Touchscreen");
MODULE_VERSION("2016.03.03");
MODULE_VERSION("2016.03.12");
MODULE_AUTHOR("Sangwon Jee <jeesw@melfas.com>");
MODULE_LICENSE("GPL");