cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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wm8350-hwmon.c (2526B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * drivers/hwmon/wm8350-hwmon.c - Wolfson Microelectronics WM8350 PMIC
      4 *                                  hardware monitoring features.
      5 *
      6 * Copyright (C) 2009 Wolfson Microelectronics plc
      7 */
      8
      9#include <linux/kernel.h>
     10#include <linux/module.h>
     11#include <linux/err.h>
     12#include <linux/platform_device.h>
     13#include <linux/hwmon.h>
     14#include <linux/hwmon-sysfs.h>
     15
     16#include <linux/mfd/wm8350/core.h>
     17#include <linux/mfd/wm8350/comparator.h>
     18
     19static const char * const input_names[] = {
     20	[WM8350_AUXADC_USB]  = "USB",
     21	[WM8350_AUXADC_LINE] = "Line",
     22	[WM8350_AUXADC_BATT] = "Battery",
     23};
     24
     25static ssize_t show_voltage(struct device *dev,
     26			    struct device_attribute *attr, char *buf)
     27{
     28	struct wm8350 *wm8350 = dev_get_drvdata(dev);
     29	int channel = to_sensor_dev_attr(attr)->index;
     30	int val;
     31
     32	val = wm8350_read_auxadc(wm8350, channel, 0, 0) * WM8350_AUX_COEFF;
     33	val = DIV_ROUND_CLOSEST(val, 1000);
     34
     35	return sprintf(buf, "%d\n", val);
     36}
     37
     38static ssize_t show_label(struct device *dev,
     39			  struct device_attribute *attr, char *buf)
     40{
     41	int channel = to_sensor_dev_attr(attr)->index;
     42
     43	return sprintf(buf, "%s\n", input_names[channel]);
     44}
     45
     46#define WM8350_NAMED_VOLTAGE(id, name) \
     47	static SENSOR_DEVICE_ATTR(in##id##_input, S_IRUGO, show_voltage,\
     48				  NULL, name);		\
     49	static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label,	\
     50				  NULL, name)
     51
     52WM8350_NAMED_VOLTAGE(0, WM8350_AUXADC_USB);
     53WM8350_NAMED_VOLTAGE(1, WM8350_AUXADC_BATT);
     54WM8350_NAMED_VOLTAGE(2, WM8350_AUXADC_LINE);
     55
     56static struct attribute *wm8350_attrs[] = {
     57	&sensor_dev_attr_in0_input.dev_attr.attr,
     58	&sensor_dev_attr_in0_label.dev_attr.attr,
     59	&sensor_dev_attr_in1_input.dev_attr.attr,
     60	&sensor_dev_attr_in1_label.dev_attr.attr,
     61	&sensor_dev_attr_in2_input.dev_attr.attr,
     62	&sensor_dev_attr_in2_label.dev_attr.attr,
     63
     64	NULL,
     65};
     66
     67ATTRIBUTE_GROUPS(wm8350);
     68
     69static int wm8350_hwmon_probe(struct platform_device *pdev)
     70{
     71	struct wm8350 *wm8350 = platform_get_drvdata(pdev);
     72	struct device *hwmon_dev;
     73
     74	hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm8350",
     75							   wm8350,
     76							   wm8350_groups);
     77	return PTR_ERR_OR_ZERO(hwmon_dev);
     78}
     79
     80static struct platform_driver wm8350_hwmon_driver = {
     81	.probe = wm8350_hwmon_probe,
     82	.driver = {
     83		.name = "wm8350-hwmon",
     84	},
     85};
     86
     87module_platform_driver(wm8350_hwmon_driver);
     88
     89MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
     90MODULE_DESCRIPTION("WM8350 Hardware Monitoring");
     91MODULE_LICENSE("GPL");
     92MODULE_ALIAS("platform:wm8350-hwmon");