[linux.git] / drivers / hwmon / wm8350-hwmon.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 <[email protected]>");
MODULE_DESCRIPTION("WM8350 Hardware Monitoring");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8350-hwmon");
Commit	Line	Data
21eb0be9	1	// SPDX-License-Identifier: GPL-2.0-only
fb6c023a MB	2	/*
	3	* drivers/hwmon/wm8350-hwmon.c - Wolfson Microelectronics WM8350 PMIC
	4	* hardware monitoring features.
	5	*
	6	* Copyright (C) 2009 Wolfson Microelectronics plc
fb6c023a MB	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
a68abd32	19	static const char * const input_names[] = {
fb6c023a MB	20	[WM8350_AUXADC_USB] = "USB",
	21	[WM8350_AUXADC_LINE] = "Line",
	22	[WM8350_AUXADC_BATT] = "Battery",
	23	};
	24
fb6c023a MB	25	static 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
	38	static 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
fb6c023a MB	52	WM8350_NAMED_VOLTAGE(0, WM8350_AUXADC_USB);
	53	WM8350_NAMED_VOLTAGE(1, WM8350_AUXADC_BATT);
	54	WM8350_NAMED_VOLTAGE(2, WM8350_AUXADC_LINE);
	55
b3aabd6d	56	static struct attribute *wm8350_attrs[] = {
fb6c023a MB	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
b3aabd6d	67	ATTRIBUTE_GROUPS(wm8350);
fb6c023a	68
6c931ae1	69	static int wm8350_hwmon_probe(struct platform_device *pdev)
fb6c023a MB	70	{
fb6c023a MB	71	struct wm8350 *wm8350 = platform_get_drvdata(pdev);
b3aabd6d	72	struct device *hwmon_dev;
fb6c023a	73
b3aabd6d AL	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);
fb6c023a MB	78	}
	79
	80	static struct platform_driver wm8350_hwmon_driver = {
	81	.probe = wm8350_hwmon_probe,
fb6c023a MB	82	.driver = {
fb6c023a MB	83	.name = "wm8350-hwmon",
fb6c023a MB	84	},
	85	};
	86
25a236a5	87	module_platform_driver(wm8350_hwmon_driver);
fb6c023a MB	88
	89	MODULE_AUTHOR("Mark Brown <[email protected]>");
	90	MODULE_DESCRIPTION("WM8350 Hardware Monitoring");
	91	MODULE_LICENSE("GPL");
	92	MODULE_ALIAS("platform:wm8350-hwmon");