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input: sensors: add self test interface for sensors class 

The self test interface is a generic interface for sensor self test.
Add the interface for user space applications to test sensors. Drivers
using sensors class should try to implement the callback if needed.

Change-Id: I008198534940c1357cfb1c7c4ff9b9b37beffdee
Signed-off-by: Oliver Wang <mengmeng@codeaurora.org>
This commit is contained in:
Oliver Wang 2014-05-19 10:01:45 +08:00
parent 3fc0e7942f
commit c4d842e406
2 changed files with 22 additions and 2 deletions
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21
drivers/sensors/sensors_class.c
View File

@ -1,4 +1,4 @@
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -176,6 +176,24 @@ static ssize_t sensors_delay_show(struct device *dev,
sensors_cdev->delay_msec);
}
static ssize_t sensors_test_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct sensors_classdev *sensors_cdev = dev_get_drvdata(dev);
int ret;
if (sensors_cdev->sensors_self_test == NULL) {
dev_err(dev, "Invalid sensor class self test handle\n");
return -EINVAL;
}
ret = sensors_cdev->sensors_self_test(sensors_cdev);
if (ret)
dev_warn(dev, "self test failed.(%d)\n", ret);
return snprintf(buf, PAGE_SIZE, "%s\n",
ret ? "fail" : "pass");
}
static struct device_attribute sensors_class_attrs[] = {
__ATTR(name, 0444, sensors_name_show, NULL),
@ -191,6 +209,7 @@ static struct device_attribute sensors_class_attrs[] = {
__ATTR(fifo_max_event_count, 0444, sensors_fifo_max_show, NULL),
__ATTR(enable, 0664, sensors_enable_show, sensors_enable_store),
__ATTR(poll_delay, 0664, sensors_delay_show, sensors_delay_store),
__ATTR(self_test, 0440, sensors_test_show, NULL),
__ATTR_NULL,
};

3
include/linux/sensors.h
View File

@ -1,4 +1,4 @@
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -96,6 +96,7 @@ struct sensors_classdev {
unsigned int enabled);
int (*sensors_poll_delay)(struct sensors_classdev *sensors_cdev,
unsigned int delay_msec);
int (*sensors_self_test)(struct sensors_classdev *sensors_cdev);
};
extern int sensors_classdev_register(struct device *parent,