93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* drivers/hwmon/wm8350-hwmon.c - Wolfson Microelectronics WM8350 PMIC
|
|
* hardware monitoring features.
|
|
*
|
|
* Copyright (C) 2009 Wolfson Microelectronics plc
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/err.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
|
|
#include <linux/mfd/wm8350/core.h>
|
|
#include <linux/mfd/wm8350/comparator.h>
|
|
|
|
static const char * const input_names[] = {
|
|
[WM8350_AUXADC_USB] = "USB",
|
|
[WM8350_AUXADC_LINE] = "Line",
|
|
[WM8350_AUXADC_BATT] = "Battery",
|
|
};
|
|
|
|
static ssize_t show_voltage(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct wm8350 *wm8350 = dev_get_drvdata(dev);
|
|
int channel = to_sensor_dev_attr(attr)->index;
|
|
int val;
|
|
|
|
val = wm8350_read_auxadc(wm8350, channel, 0, 0) * WM8350_AUX_COEFF;
|
|
val = DIV_ROUND_CLOSEST(val, 1000);
|
|
|
|
return sprintf(buf, "%d\n", val);
|
|
}
|
|
|
|
static ssize_t show_label(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
int channel = to_sensor_dev_attr(attr)->index;
|
|
|
|
return sprintf(buf, "%s\n", input_names[channel]);
|
|
}
|
|
|
|
#define WM8350_NAMED_VOLTAGE(id, name) \
|
|
static SENSOR_DEVICE_ATTR(in##id##_input, S_IRUGO, show_voltage,\
|
|
NULL, name); \
|
|
static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \
|
|
NULL, name)
|
|
|
|
WM8350_NAMED_VOLTAGE(0, WM8350_AUXADC_USB);
|
|
WM8350_NAMED_VOLTAGE(1, WM8350_AUXADC_BATT);
|
|
WM8350_NAMED_VOLTAGE(2, WM8350_AUXADC_LINE);
|
|
|
|
static struct attribute *wm8350_attrs[] = {
|
|
&sensor_dev_attr_in0_input.dev_attr.attr,
|
|
&sensor_dev_attr_in0_label.dev_attr.attr,
|
|
&sensor_dev_attr_in1_input.dev_attr.attr,
|
|
&sensor_dev_attr_in1_label.dev_attr.attr,
|
|
&sensor_dev_attr_in2_input.dev_attr.attr,
|
|
&sensor_dev_attr_in2_label.dev_attr.attr,
|
|
|
|
NULL,
|
|
};
|
|
|
|
ATTRIBUTE_GROUPS(wm8350);
|
|
|
|
static int wm8350_hwmon_probe(struct platform_device *pdev)
|
|
{
|
|
struct wm8350 *wm8350 = platform_get_drvdata(pdev);
|
|
struct device *hwmon_dev;
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm8350",
|
|
wm8350,
|
|
wm8350_groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static struct platform_driver wm8350_hwmon_driver = {
|
|
.probe = wm8350_hwmon_probe,
|
|
.driver = {
|
|
.name = "wm8350-hwmon",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(wm8350_hwmon_driver);
|
|
|
|
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|
|
MODULE_DESCRIPTION("WM8350 Hardware Monitoring");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:wm8350-hwmon");
|