mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 19:53:59 +08:00
c30aa39c23
The driver did not return an error if the call to hwmon_device_register failed. Fix by returning the error reported from hwmon_device_register. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
157 lines
4.8 KiB
C
157 lines
4.8 KiB
C
/*
|
|
*
|
|
* TWL4030 MADC Hwmon driver-This driver monitors the real time
|
|
* conversion of analog signals like battery temperature,
|
|
* battery type, battery level etc. User can ask for the conversion on a
|
|
* particular channel using the sysfs nodes.
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
|
|
* J Keerthy <j-keerthy@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/i2c/twl.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/i2c/twl4030-madc.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/sysfs.h>
|
|
#include <linux/err.h>
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* sysfs hook function
|
|
*/
|
|
static ssize_t madc_read(struct device *dev,
|
|
struct device_attribute *devattr, char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct twl4030_madc_request req;
|
|
long val;
|
|
|
|
req.channels = (1 << attr->index);
|
|
req.method = TWL4030_MADC_SW2;
|
|
req.func_cb = NULL;
|
|
val = twl4030_madc_conversion(&req);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
return sprintf(buf, "%d\n", req.rbuf[attr->index]);
|
|
}
|
|
|
|
/* sysfs nodes to read individual channels from user side */
|
|
static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, madc_read, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, madc_read, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, madc_read, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, madc_read, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, madc_read, NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, madc_read, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, madc_read, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, madc_read, NULL, 7);
|
|
static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, madc_read, NULL, 8);
|
|
static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, madc_read, NULL, 9);
|
|
static SENSOR_DEVICE_ATTR(curr10_input, S_IRUGO, madc_read, NULL, 10);
|
|
static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, madc_read, NULL, 11);
|
|
static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, madc_read, NULL, 12);
|
|
static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, madc_read, NULL, 15);
|
|
|
|
static struct attribute *twl4030_madc_attributes[] = {
|
|
&sensor_dev_attr_in0_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
&sensor_dev_attr_in2_input.dev_attr.attr,
|
|
&sensor_dev_attr_in3_input.dev_attr.attr,
|
|
&sensor_dev_attr_in4_input.dev_attr.attr,
|
|
&sensor_dev_attr_in5_input.dev_attr.attr,
|
|
&sensor_dev_attr_in6_input.dev_attr.attr,
|
|
&sensor_dev_attr_in7_input.dev_attr.attr,
|
|
&sensor_dev_attr_in8_input.dev_attr.attr,
|
|
&sensor_dev_attr_in9_input.dev_attr.attr,
|
|
&sensor_dev_attr_curr10_input.dev_attr.attr,
|
|
&sensor_dev_attr_in11_input.dev_attr.attr,
|
|
&sensor_dev_attr_in12_input.dev_attr.attr,
|
|
&sensor_dev_attr_in15_input.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group twl4030_madc_group = {
|
|
.attrs = twl4030_madc_attributes,
|
|
};
|
|
|
|
static int __devinit twl4030_madc_hwmon_probe(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
struct device *hwmon;
|
|
|
|
ret = sysfs_create_group(&pdev->dev.kobj, &twl4030_madc_group);
|
|
if (ret)
|
|
goto err_sysfs;
|
|
hwmon = hwmon_device_register(&pdev->dev);
|
|
if (IS_ERR(hwmon)) {
|
|
dev_err(&pdev->dev, "hwmon_device_register failed.\n");
|
|
ret = PTR_ERR(hwmon);
|
|
goto err_reg;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_reg:
|
|
sysfs_remove_group(&pdev->dev.kobj, &twl4030_madc_group);
|
|
err_sysfs:
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit twl4030_madc_hwmon_remove(struct platform_device *pdev)
|
|
{
|
|
hwmon_device_unregister(&pdev->dev);
|
|
sysfs_remove_group(&pdev->dev.kobj, &twl4030_madc_group);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver twl4030_madc_hwmon_driver = {
|
|
.probe = twl4030_madc_hwmon_probe,
|
|
.remove = __exit_p(twl4030_madc_hwmon_remove),
|
|
.driver = {
|
|
.name = "twl4030_madc_hwmon",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init twl4030_madc_hwmon_init(void)
|
|
{
|
|
return platform_driver_register(&twl4030_madc_hwmon_driver);
|
|
}
|
|
|
|
module_init(twl4030_madc_hwmon_init);
|
|
|
|
static void __exit twl4030_madc_hwmon_exit(void)
|
|
{
|
|
platform_driver_unregister(&twl4030_madc_hwmon_driver);
|
|
}
|
|
|
|
module_exit(twl4030_madc_hwmon_exit);
|
|
|
|
MODULE_DESCRIPTION("TWL4030 ADC Hwmon driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("J Keerthy");
|
|
MODULE_ALIAS("platform:twl4030_madc_hwmon");
|