[mirror_ubuntu-bionic-kernel.git] / drivers / hwmon / wm8350-hwmon.c

/*
 * drivers/hwmon/wm8350-hwmon.c - Wolfson Microelectronics WM8350 PMIC
 *                                  hardware monitoring features.
 *
 * Copyright (C) 2009 Wolfson Microelectronics plc
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License v2 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 Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#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");
Commit	Line	Data
fb6c023a MB	1	/*
	2	* drivers/hwmon/wm8350-hwmon.c - Wolfson Microelectronics WM8350 PMIC
	3	* hardware monitoring features.
	4	*
	5	* Copyright (C) 2009 Wolfson Microelectronics plc
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License v2 as published by the
	9	* Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along with
	17	* this program; if not, write to the Free Software Foundation, Inc.,
	18	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/err.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/hwmon.h>
	26	#include <linux/hwmon-sysfs.h>
	27
	28	#include <linux/mfd/wm8350/core.h>
	29	#include <linux/mfd/wm8350/comparator.h>
	30
a68abd32	31	static const char * const input_names[] = {
fb6c023a MB	32	[WM8350_AUXADC_USB] = "USB",
	33	[WM8350_AUXADC_LINE] = "Line",
	34	[WM8350_AUXADC_BATT] = "Battery",
	35	};
	36
fb6c023a MB	37	static ssize_t show_voltage(struct device *dev,
	38	struct device_attribute attr, char buf)
	39	{
	40	struct wm8350 *wm8350 = dev_get_drvdata(dev);
	41	int channel = to_sensor_dev_attr(attr)->index;
	42	int val;
	43
	44	val = wm8350_read_auxadc(wm8350, channel, 0, 0) * WM8350_AUX_COEFF;
	45	val = DIV_ROUND_CLOSEST(val, 1000);
	46
	47	return sprintf(buf, "%d\n", val);
	48	}
	49
	50	static ssize_t show_label(struct device *dev,
	51	struct device_attribute attr, char buf)
	52	{
	53	int channel = to_sensor_dev_attr(attr)->index;
	54
	55	return sprintf(buf, "%s\n", input_names[channel]);
	56	}
	57
	58	#define WM8350_NAMED_VOLTAGE(id, name) \
	59	static SENSOR_DEVICE_ATTR(in##id##_input, S_IRUGO, show_voltage,\
	60	NULL, name); \
	61	static SENSOR_DEVICE_ATTR(in##id##_label, S_IRUGO, show_label, \
	62	NULL, name)
	63
fb6c023a MB	64	WM8350_NAMED_VOLTAGE(0, WM8350_AUXADC_USB);
	65	WM8350_NAMED_VOLTAGE(1, WM8350_AUXADC_BATT);
	66	WM8350_NAMED_VOLTAGE(2, WM8350_AUXADC_LINE);
	67
b3aabd6d	68	static struct attribute *wm8350_attrs[] = {
fb6c023a MB	69	&sensor_dev_attr_in0_input.dev_attr.attr,
	70	&sensor_dev_attr_in0_label.dev_attr.attr,
	71	&sensor_dev_attr_in1_input.dev_attr.attr,
	72	&sensor_dev_attr_in1_label.dev_attr.attr,
	73	&sensor_dev_attr_in2_input.dev_attr.attr,
	74	&sensor_dev_attr_in2_label.dev_attr.attr,
	75
	76	NULL,
	77	};
	78
b3aabd6d	79	ATTRIBUTE_GROUPS(wm8350);
fb6c023a	80
6c931ae1	81	static int wm8350_hwmon_probe(struct platform_device *pdev)
fb6c023a MB	82	{
fb6c023a MB	83	struct wm8350 *wm8350 = platform_get_drvdata(pdev);
b3aabd6d	84	struct device *hwmon_dev;
fb6c023a	85
b3aabd6d AL	86	hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "wm8350",
	87	wm8350,
	88	wm8350_groups);
	89	return PTR_ERR_OR_ZERO(hwmon_dev);
fb6c023a MB	90	}
	91
	92	static struct platform_driver wm8350_hwmon_driver = {
	93	.probe = wm8350_hwmon_probe,
fb6c023a MB	94	.driver = {
fb6c023a MB	95	.name = "wm8350-hwmon",
fb6c023a MB	96	},
	97	};
	98
25a236a5	99	module_platform_driver(wm8350_hwmon_driver);
fb6c023a MB	100
	101	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	102	MODULE_DESCRIPTION("WM8350 Hardware Monitoring");
	103	MODULE_LICENSE("GPL");
	104	MODULE_ALIAS("platform:wm8350-hwmon");