[linux.git] / drivers / hwmon / da9052-hwmon.c

/*
 * HWMON Driver for Dialog DA9052
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <[email protected]>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/err.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>

#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>

struct da9052_hwmon {
	struct da9052	*da9052;
	struct device	*class_device;
	struct mutex	hwmon_lock;
};

static const char * const input_names[] = {
	[DA9052_ADC_VDDOUT]	=	"VDDOUT",
	[DA9052_ADC_ICH]	=	"CHARGING CURRENT",
	[DA9052_ADC_TBAT]	=	"BATTERY TEMP",
	[DA9052_ADC_VBAT]	=	"BATTERY VOLTAGE",
	[DA9052_ADC_IN4]	=	"ADC IN4",
	[DA9052_ADC_IN5]	=	"ADC IN5",
	[DA9052_ADC_IN6]	=	"ADC IN6",
	[DA9052_ADC_TJUNC]	=	"BATTERY JUNCTION TEMP",
	[DA9052_ADC_VBBAT]	=	"BACK-UP BATTERY VOLTAGE",
};

/* Conversion function for VDDOUT and VBAT */
static inline int volt_reg_to_mv(int value)
{
	return DIV_ROUND_CLOSEST(value * 1000, 512) + 2500;
}

/* Conversion function for ADC channels 4, 5 and 6 */
static inline int input_reg_to_mv(int value)
{
	return DIV_ROUND_CLOSEST(value * 2500, 1023);
}

/* Conversion function for VBBAT */
static inline int vbbat_reg_to_mv(int value)
{
	return DIV_ROUND_CLOSEST(value * 2500, 512);
}

static inline int da9052_enable_vddout_channel(struct da9052 *da9052)
{
	return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
				 DA9052_ADCCONT_AUTOVDDEN,
				 DA9052_ADCCONT_AUTOVDDEN);
}

static inline int da9052_disable_vddout_channel(struct da9052 *da9052)
{
	return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
				 DA9052_ADCCONT_AUTOVDDEN, 0);
}

static ssize_t da9052_read_vddout(struct device *dev,
				  struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int ret, vdd;

	mutex_lock(&hwmon->hwmon_lock);

	ret = da9052_enable_vddout_channel(hwmon->da9052);
	if (ret < 0)
		goto hwmon_err;

	vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG);
	if (vdd < 0) {
		ret = vdd;
		goto hwmon_err_release;
	}

	ret = da9052_disable_vddout_channel(hwmon->da9052);
	if (ret < 0)
		goto hwmon_err;

	mutex_unlock(&hwmon->hwmon_lock);
	return sprintf(buf, "%d\n", volt_reg_to_mv(vdd));

hwmon_err_release:
	da9052_disable_vddout_channel(hwmon->da9052);
hwmon_err:
	mutex_unlock(&hwmon->hwmon_lock);
	return ret;
}

static ssize_t da9052_read_ich(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int ret;

	ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG);
	if (ret < 0)
		return ret;

	/* Equivalent to 3.9mA/bit in register ICHG_AV */
	return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
}

static ssize_t da9052_read_tbat(struct device *dev,
				struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);

	return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
}

static ssize_t da9052_read_vbat(struct device *dev,
				struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int ret;

	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n", volt_reg_to_mv(ret));
}

static ssize_t da9052_read_misc_channel(struct device *dev,
					struct device_attribute *devattr,
					char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int channel = to_sensor_dev_attr(devattr)->index;
	int ret;

	ret = da9052_adc_manual_read(hwmon->da9052, channel);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n", input_reg_to_mv(ret));
}

static ssize_t da9052_read_tjunc(struct device *dev,
				 struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int tjunc;
	int toffset;

	tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG);
	if (tjunc < 0)
		return tjunc;

	toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG);
	if (toffset < 0)
		return toffset;

	/*
	 * Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8
	 * T_OFFSET is a trim value used to improve accuracy of the result
	 */
	return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
}

static ssize_t da9052_read_vbbat(struct device *dev,
				 struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int ret;

	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n", vbbat_reg_to_mv(ret));
}

static ssize_t da9052_hwmon_show_name(struct device *dev,
				      struct device_attribute *devattr,
				      char *buf)
{
	return sprintf(buf, "da9052-hwmon\n");
}

static ssize_t show_label(struct device *dev,
			  struct device_attribute *devattr, char *buf)
{
	return sprintf(buf, "%s\n",
		       input_names[to_sensor_dev_attr(devattr)->index]);
}

static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, da9052_read_vddout, NULL,
			  DA9052_ADC_VDDOUT);
static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_VDDOUT);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, da9052_read_vbat, NULL,
			  DA9052_ADC_VBAT);
static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_VBAT);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_read_misc_channel, NULL,
			  DA9052_ADC_IN4);
static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_IN4);
static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_read_misc_channel, NULL,
			  DA9052_ADC_IN5);
static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_IN5);
static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_read_misc_channel, NULL,
			  DA9052_ADC_IN6);
static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_IN6);
static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, da9052_read_vbbat, NULL,
			  DA9052_ADC_VBBAT);
static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_VBBAT);

static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, da9052_read_ich, NULL,
			  DA9052_ADC_ICH);
static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_ICH);

static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, da9052_read_tbat, NULL,
			  DA9052_ADC_TBAT);
static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_TBAT);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, da9052_read_tjunc, NULL,
			  DA9052_ADC_TJUNC);
static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_TJUNC);

static DEVICE_ATTR(name, S_IRUGO, da9052_hwmon_show_name, NULL);

static struct attribute *da9052_attr[] = {
	&dev_attr_name.attr,
	&sensor_dev_attr_in0_input.dev_attr.attr,
	&sensor_dev_attr_in0_label.dev_attr.attr,
	&sensor_dev_attr_in3_input.dev_attr.attr,
	&sensor_dev_attr_in3_label.dev_attr.attr,
	&sensor_dev_attr_in4_input.dev_attr.attr,
	&sensor_dev_attr_in4_label.dev_attr.attr,
	&sensor_dev_attr_in5_input.dev_attr.attr,
	&sensor_dev_attr_in5_label.dev_attr.attr,
	&sensor_dev_attr_in6_input.dev_attr.attr,
	&sensor_dev_attr_in6_label.dev_attr.attr,
	&sensor_dev_attr_in9_input.dev_attr.attr,
	&sensor_dev_attr_in9_label.dev_attr.attr,
	&sensor_dev_attr_curr1_input.dev_attr.attr,
	&sensor_dev_attr_curr1_label.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp2_label.dev_attr.attr,
	&sensor_dev_attr_temp8_input.dev_attr.attr,
	&sensor_dev_attr_temp8_label.dev_attr.attr,
	NULL
};

static const struct attribute_group da9052_attr_group = {.attrs = da9052_attr};

static int da9052_hwmon_probe(struct platform_device *pdev)
{
	struct da9052_hwmon *hwmon;
	int ret;

	hwmon = devm_kzalloc(&pdev->dev, sizeof(struct da9052_hwmon),
			     GFP_KERNEL);
	if (!hwmon)
		return -ENOMEM;

	mutex_init(&hwmon->hwmon_lock);
	hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);

	platform_set_drvdata(pdev, hwmon);

	ret = sysfs_create_group(&pdev->dev.kobj, &da9052_attr_group);
	if (ret)
		goto err_mem;

	hwmon->class_device = hwmon_device_register(&pdev->dev);
	if (IS_ERR(hwmon->class_device)) {
		ret = PTR_ERR(hwmon->class_device);
		goto err_sysfs;
	}

	return 0;

err_sysfs:
	sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
err_mem:
	return ret;
}

static int da9052_hwmon_remove(struct platform_device *pdev)
{
	struct da9052_hwmon *hwmon = platform_get_drvdata(pdev);

	hwmon_device_unregister(hwmon->class_device);
	sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);

	return 0;
}

static struct platform_driver da9052_hwmon_driver = {
	.probe = da9052_hwmon_probe,
	.remove = da9052_hwmon_remove,
	.driver = {
		.name = "da9052-hwmon",
		.owner = THIS_MODULE,
	},
};

module_platform_driver(da9052_hwmon_driver);

MODULE_AUTHOR("David Dajun Chen <[email protected]>");
MODULE_DESCRIPTION("DA9052 HWMON driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-hwmon");
Commit	Line	Data
e41f6432 AJ	1	/*
	2	* HWMON Driver for Dialog DA9052
	3	*
	4	* Copyright(c) 2012 Dialog Semiconductor Ltd.
	5	*
	6	* Author: David Dajun Chen <[email protected]>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
	13	*/
	14
e41f6432 AJ	15	#include <linux/err.h>
	16	#include <linux/hwmon.h>
	17	#include <linux/hwmon-sysfs.h>
	18	#include <linux/init.h>
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/slab.h>
	22	#include <linux/platform_device.h>
	23
	24	#include <linux/mfd/da9052/da9052.h>
	25	#include <linux/mfd/da9052/reg.h>
	26
	27	struct da9052_hwmon {
	28	struct da9052 *da9052;
	29	struct device *class_device;
	30	struct mutex hwmon_lock;
	31	};
	32
	33	static const char * const input_names[] = {
	34	[DA9052_ADC_VDDOUT] = "VDDOUT",
	35	[DA9052_ADC_ICH] = "CHARGING CURRENT",
	36	[DA9052_ADC_TBAT] = "BATTERY TEMP",
	37	[DA9052_ADC_VBAT] = "BATTERY VOLTAGE",
	38	[DA9052_ADC_IN4] = "ADC IN4",
	39	[DA9052_ADC_IN5] = "ADC IN5",
	40	[DA9052_ADC_IN6] = "ADC IN6",
	41	[DA9052_ADC_TJUNC] = "BATTERY JUNCTION TEMP",
	42	[DA9052_ADC_VBBAT] = "BACK-UP BATTERY VOLTAGE",
	43	};
	44
	45	/* Conversion function for VDDOUT and VBAT */
088ce2ac	46	static inline int volt_reg_to_mv(int value)
e41f6432 AJ	47	{
	48	return DIV_ROUND_CLOSEST(value * 1000, 512) + 2500;
	49	}
	50
	51	/* Conversion function for ADC channels 4, 5 and 6 */
088ce2ac	52	static inline int input_reg_to_mv(int value)
e41f6432 AJ	53	{
	54	return DIV_ROUND_CLOSEST(value * 2500, 1023);
	55	}
	56
	57	/* Conversion function for VBBAT */
088ce2ac	58	static inline int vbbat_reg_to_mv(int value)
e41f6432 AJ	59	{
	60	return DIV_ROUND_CLOSEST(value * 2500, 512);
	61	}
	62
d9b24e37	63	static inline int da9052_enable_vddout_channel(struct da9052 *da9052)
e41f6432	64	{
d9b24e37 AL	65	return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
	66	DA9052_ADCCONT_AUTOVDDEN,
	67	DA9052_ADCCONT_AUTOVDDEN);
e41f6432 AJ	68	}
e41f6432 AJ	69
d9b24e37	70	static inline int da9052_disable_vddout_channel(struct da9052 *da9052)
e41f6432	71	{
d9b24e37 AL	72	return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
d9b24e37 AL	73	DA9052_ADCCONT_AUTOVDDEN, 0);
e41f6432 AJ	74	}
	75
	76	static ssize_t da9052_read_vddout(struct device *dev,
	77	struct device_attribute devattr, char buf)
	78	{
	79	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	80	int ret, vdd;
	81
	82	mutex_lock(&hwmon->hwmon_lock);
	83
	84	ret = da9052_enable_vddout_channel(hwmon->da9052);
	85	if (ret < 0)
	86	goto hwmon_err;
	87
	88	vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG);
	89	if (vdd < 0) {
	90	ret = vdd;
	91	goto hwmon_err_release;
	92	}
	93
	94	ret = da9052_disable_vddout_channel(hwmon->da9052);
	95	if (ret < 0)
	96	goto hwmon_err;
	97
	98	mutex_unlock(&hwmon->hwmon_lock);
088ce2ac	99	return sprintf(buf, "%d\n", volt_reg_to_mv(vdd));
e41f6432 AJ	100
	101	hwmon_err_release:
	102	da9052_disable_vddout_channel(hwmon->da9052);
	103	hwmon_err:
	104	mutex_unlock(&hwmon->hwmon_lock);
	105	return ret;
	106	}
	107
	108	static ssize_t da9052_read_ich(struct device *dev,
	109	struct device_attribute devattr, char buf)
	110	{
	111	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	112	int ret;
	113
	114	ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG);
	115	if (ret < 0)
	116	return ret;
	117
	118	/* Equivalent to 3.9mA/bit in register ICHG_AV */
	119	return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
	120	}
	121
	122	static ssize_t da9052_read_tbat(struct device *dev,
	123	struct device_attribute devattr, char buf)
	124	{
	125	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	126
	127	return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
	128	}
	129
	130	static ssize_t da9052_read_vbat(struct device *dev,
	131	struct device_attribute devattr, char buf)
	132	{
	133	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	134	int ret;
	135
	136	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT);
	137	if (ret < 0)
	138	return ret;
	139
088ce2ac	140	return sprintf(buf, "%d\n", volt_reg_to_mv(ret));
e41f6432 AJ	141	}
	142
	143	static ssize_t da9052_read_misc_channel(struct device *dev,
	144	struct device_attribute *devattr,
	145	char *buf)
	146	{
	147	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	148	int channel = to_sensor_dev_attr(devattr)->index;
	149	int ret;
	150
	151	ret = da9052_adc_manual_read(hwmon->da9052, channel);
	152	if (ret < 0)
	153	return ret;
	154
088ce2ac	155	return sprintf(buf, "%d\n", input_reg_to_mv(ret));
e41f6432 AJ	156	}
	157
	158	static ssize_t da9052_read_tjunc(struct device *dev,
	159	struct device_attribute devattr, char buf)
	160	{
	161	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	162	int tjunc;
	163	int toffset;
	164
	165	tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG);
	166	if (tjunc < 0)
	167	return tjunc;
	168
	169	toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG);
	170	if (toffset < 0)
	171	return toffset;
	172
	173	/*
	174	* Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8
	175	* T_OFFSET is a trim value used to improve accuracy of the result
	176	*/
	177	return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
	178	}
	179
	180	static ssize_t da9052_read_vbbat(struct device *dev,
	181	struct device_attribute devattr, char buf)
	182	{
	183	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	184	int ret;
	185
	186	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT);
	187	if (ret < 0)
	188	return ret;
	189
088ce2ac	190	return sprintf(buf, "%d\n", vbbat_reg_to_mv(ret));
e41f6432 AJ	191	}
	192
	193	static ssize_t da9052_hwmon_show_name(struct device *dev,
	194	struct device_attribute *devattr,
	195	char *buf)
	196	{
	197	return sprintf(buf, "da9052-hwmon\n");
	198	}
	199
	200	static ssize_t show_label(struct device *dev,
	201	struct device_attribute devattr, char buf)
	202	{
	203	return sprintf(buf, "%s\n",
	204	input_names[to_sensor_dev_attr(devattr)->index]);
	205	}
	206
	207	static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, da9052_read_vddout, NULL,
	208	DA9052_ADC_VDDOUT);
	209	static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL,
	210	DA9052_ADC_VDDOUT);
	211	static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, da9052_read_vbat, NULL,
	212	DA9052_ADC_VBAT);
	213	static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL,
	214	DA9052_ADC_VBAT);
	215	static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_read_misc_channel, NULL,
	216	DA9052_ADC_IN4);
	217	static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL,
	218	DA9052_ADC_IN4);
	219	static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_read_misc_channel, NULL,
	220	DA9052_ADC_IN5);
	221	static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL,
	222	DA9052_ADC_IN5);
	223	static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_read_misc_channel, NULL,
	224	DA9052_ADC_IN6);
	225	static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL,
	226	DA9052_ADC_IN6);
	227	static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, da9052_read_vbbat, NULL,
	228	DA9052_ADC_VBBAT);
	229	static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL,
	230	DA9052_ADC_VBBAT);
	231
	232	static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, da9052_read_ich, NULL,
	233	DA9052_ADC_ICH);
	234	static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_label, NULL,
	235	DA9052_ADC_ICH);
	236
	237	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, da9052_read_tbat, NULL,
	238	DA9052_ADC_TBAT);
	239	static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
	240	DA9052_ADC_TBAT);
	241	static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, da9052_read_tjunc, NULL,
	242	DA9052_ADC_TJUNC);
	243	static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_label, NULL,
	244	DA9052_ADC_TJUNC);
	245
	246	static DEVICE_ATTR(name, S_IRUGO, da9052_hwmon_show_name, NULL);
	247
	248	static struct attribute *da9052_attr[] = {
	249	&dev_attr_name.attr,
	250	&sensor_dev_attr_in0_input.dev_attr.attr,
	251	&sensor_dev_attr_in0_label.dev_attr.attr,
	252	&sensor_dev_attr_in3_input.dev_attr.attr,
	253	&sensor_dev_attr_in3_label.dev_attr.attr,
	254	&sensor_dev_attr_in4_input.dev_attr.attr,
255	&sensor_dev_attr_in4_label.dev_attr.attr,
256	&sensor_dev_attr_in5_input.dev_attr.attr,
257	&sensor_dev_attr_in5_label.dev_attr.attr,
258	&sensor_dev_attr_in6_input.dev_attr.attr,
259	&sensor_dev_attr_in6_label.dev_attr.attr,
260	&sensor_dev_attr_in9_input.dev_attr.attr,
261	&sensor_dev_attr_in9_label.dev_attr.attr,
262	&sensor_dev_attr_curr1_input.dev_attr.attr,
263	&sensor_dev_attr_curr1_label.dev_attr.attr,
264	&sensor_dev_attr_temp2_input.dev_attr.attr,
265	&sensor_dev_attr_temp2_label.dev_attr.attr,
266	&sensor_dev_attr_temp8_input.dev_attr.attr,
267	&sensor_dev_attr_temp8_label.dev_attr.attr,
268	NULL
269	};
270
271	static const struct attribute_group da9052_attr_group = {.attrs = da9052_attr};
272
6c931ae1	273	static int da9052_hwmon_probe(struct platform_device *pdev)
e41f6432 AJ	274	{
	275	struct da9052_hwmon *hwmon;
	276	int ret;
	277
	278	hwmon = devm_kzalloc(&pdev->dev, sizeof(struct da9052_hwmon),
	279	GFP_KERNEL);
	280	if (!hwmon)
	281	return -ENOMEM;
	282
	283	mutex_init(&hwmon->hwmon_lock);
	284	hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);
	285
	286	platform_set_drvdata(pdev, hwmon);
	287
	288	ret = sysfs_create_group(&pdev->dev.kobj, &da9052_attr_group);
	289	if (ret)
	290	goto err_mem;
	291
	292	hwmon->class_device = hwmon_device_register(&pdev->dev);
	293	if (IS_ERR(hwmon->class_device)) {
	294	ret = PTR_ERR(hwmon->class_device);
	295	goto err_sysfs;
	296	}
	297
	298	return 0;
	299
	300	err_sysfs:
	301	sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
	302	err_mem:
	303	return ret;
	304	}
	305
281dfd0b	306	static int da9052_hwmon_remove(struct platform_device *pdev)
e41f6432 AJ	307	{
	308	struct da9052_hwmon *hwmon = platform_get_drvdata(pdev);
	309
	310	hwmon_device_unregister(hwmon->class_device);
	311	sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
	312
	313	return 0;
	314	}
	315
	316	static struct platform_driver da9052_hwmon_driver = {
	317	.probe = da9052_hwmon_probe,
9e5e9b7a	318	.remove = da9052_hwmon_remove,
e41f6432 AJ	319	.driver = {
	320	.name = "da9052-hwmon",
	321	.owner = THIS_MODULE,
	322	},
	323	};
	324
	325	module_platform_driver(da9052_hwmon_driver);
	326
	327	MODULE_AUTHOR("David Dajun Chen <[email protected]>");
	328	MODULE_DESCRIPTION("DA9052 HWMON driver");
	329	MODULE_LICENSE("GPL");
	330	MODULE_ALIAS("platform:da9052-hwmon");