[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/delay.h>
#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 int da9052_enable_vddout_channel(struct da9052 *da9052)
{
	int ret;

	ret = da9052_reg_read(da9052, DA9052_ADC_CONT_REG);
	if (ret < 0)
		return ret;

	ret |= DA9052_ADCCONT_AUTOVDDEN;

	return da9052_reg_write(da9052, DA9052_ADC_CONT_REG, ret);
}

static int da9052_disable_vddout_channel(struct da9052 *da9052)
{
	int ret;

	ret = da9052_reg_read(da9052, DA9052_ADC_CONT_REG);
	if (ret < 0)
		return ret;

	ret &= ~DA9052_ADCCONT_AUTOVDDEN;

	return da9052_reg_write(da9052, DA9052_ADC_CONT_REG, ret);
}

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 __devinit 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 __devexit 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 = __devexit_p(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
	15	#include <linux/delay.h>
	16	#include <linux/err.h>
	17	#include <linux/hwmon.h>
	18	#include <linux/hwmon-sysfs.h>
	19	#include <linux/init.h>
	20	#include <linux/kernel.h>
	21	#include <linux/module.h>
	22	#include <linux/slab.h>
	23	#include <linux/platform_device.h>
	24
	25	#include <linux/mfd/da9052/da9052.h>
	26	#include <linux/mfd/da9052/reg.h>
	27
	28	struct da9052_hwmon {
	29	struct da9052 *da9052;
	30	struct device *class_device;
	31	struct mutex hwmon_lock;
	32	};
	33
	34	static const char * const input_names[] = {
	35	[DA9052_ADC_VDDOUT] = "VDDOUT",
	36	[DA9052_ADC_ICH] = "CHARGING CURRENT",
	37	[DA9052_ADC_TBAT] = "BATTERY TEMP",
	38	[DA9052_ADC_VBAT] = "BATTERY VOLTAGE",
	39	[DA9052_ADC_IN4] = "ADC IN4",
	40	[DA9052_ADC_IN5] = "ADC IN5",
	41	[DA9052_ADC_IN6] = "ADC IN6",
	42	[DA9052_ADC_TJUNC] = "BATTERY JUNCTION TEMP",
	43	[DA9052_ADC_VBBAT] = "BACK-UP BATTERY VOLTAGE",
	44	};
	45
	46	/* Conversion function for VDDOUT and VBAT */
	47	static inline int volt_reg_to_mV(int value)
	48	{
	49	return DIV_ROUND_CLOSEST(value * 1000, 512) + 2500;
	50	}
	51
	52	/* Conversion function for ADC channels 4, 5 and 6 */
	53	static inline int input_reg_to_mV(int value)
	54	{
	55	return DIV_ROUND_CLOSEST(value * 2500, 1023);
	56	}
	57
	58	/* Conversion function for VBBAT */
	59	static inline int vbbat_reg_to_mV(int value)
	60	{
	61	return DIV_ROUND_CLOSEST(value * 2500, 512);
	62	}
	63
	64	static int da9052_enable_vddout_channel(struct da9052 *da9052)
65	{
66	int ret;
67
68	ret = da9052_reg_read(da9052, DA9052_ADC_CONT_REG);
69	if (ret < 0)
70	return ret;
71
72	ret \|= DA9052_ADCCONT_AUTOVDDEN;
73
74	return da9052_reg_write(da9052, DA9052_ADC_CONT_REG, ret);
75	}
76
77	static int da9052_disable_vddout_channel(struct da9052 *da9052)
78	{
79	int ret;
80
81	ret = da9052_reg_read(da9052, DA9052_ADC_CONT_REG);
82	if (ret < 0)
83	return ret;
84
85	ret &= ~DA9052_ADCCONT_AUTOVDDEN;
86
87	return da9052_reg_write(da9052, DA9052_ADC_CONT_REG, ret);
88	}
89
90	static ssize_t da9052_read_vddout(struct device *dev,
91	struct device_attribute devattr, char buf)
92	{
93	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
94	int ret, vdd;
95
96	mutex_lock(&hwmon->hwmon_lock);
97
98	ret = da9052_enable_vddout_channel(hwmon->da9052);
99	if (ret < 0)
100	goto hwmon_err;
101
102	vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG);
103	if (vdd < 0) {
104	ret = vdd;
105	goto hwmon_err_release;
106	}
107
108	ret = da9052_disable_vddout_channel(hwmon->da9052);
109	if (ret < 0)
110	goto hwmon_err;
111
112	mutex_unlock(&hwmon->hwmon_lock);
113	return sprintf(buf, "%d\n", volt_reg_to_mV(vdd));
114
115	hwmon_err_release:
116	da9052_disable_vddout_channel(hwmon->da9052);
117	hwmon_err:
118	mutex_unlock(&hwmon->hwmon_lock);
119	return ret;
120	}
121
122	static ssize_t da9052_read_ich(struct device *dev,
123	struct device_attribute devattr, char buf)
124	{
125	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
126	int ret;
127
128	ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG);
129	if (ret < 0)
130	return ret;
131
132	/* Equivalent to 3.9mA/bit in register ICHG_AV */
133	return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
134	}
135
136	static ssize_t da9052_read_tbat(struct device *dev,
137	struct device_attribute devattr, char buf)
138	{
139	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
140
141	return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
142	}
143
144	static ssize_t da9052_read_vbat(struct device *dev,
145	struct device_attribute devattr, char buf)
146	{
147	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
148	int ret;
149
150	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT);
151	if (ret < 0)
152	return ret;
153
154	return sprintf(buf, "%d\n", volt_reg_to_mV(ret));
155	}
156
157	static ssize_t da9052_read_misc_channel(struct device *dev,
158	struct device_attribute *devattr,
159	char *buf)
160	{
161	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
162	int channel = to_sensor_dev_attr(devattr)->index;
163	int ret;
164
165	ret = da9052_adc_manual_read(hwmon->da9052, channel);
166	if (ret < 0)
167	return ret;
168
169	return sprintf(buf, "%d\n", input_reg_to_mV(ret));
170	}
171
172	static ssize_t da9052_read_tjunc(struct device *dev,
173	struct device_attribute devattr, char buf)
174	{
175	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
176	int tjunc;
177	int toffset;
178
179	tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG);
180	if (tjunc < 0)
181	return tjunc;
182
183	toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG);
184	if (toffset < 0)
185	return toffset;
186
187	/*
188	* Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8
189	* T_OFFSET is a trim value used to improve accuracy of the result
190	*/
191	return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
192	}
193
194	static ssize_t da9052_read_vbbat(struct device *dev,
195	struct device_attribute devattr, char buf)
196	{
197	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
198	int ret;
199
200	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT);
201	if (ret < 0)
202	return ret;
203
204	return sprintf(buf, "%d\n", vbbat_reg_to_mV(ret));
205	}
206
207	static ssize_t da9052_hwmon_show_name(struct device *dev,
208	struct device_attribute *devattr,
209	char *buf)
210	{
211	return sprintf(buf, "da9052-hwmon\n");
212	}
213
214	static ssize_t show_label(struct device *dev,
215	struct device_attribute devattr, char buf)
216	{
217	return sprintf(buf, "%s\n",
218	input_names[to_sensor_dev_attr(devattr)->index]);
219	}
220
221	static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, da9052_read_vddout, NULL,
222	DA9052_ADC_VDDOUT);
223	static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL,
224	DA9052_ADC_VDDOUT);
225	static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, da9052_read_vbat, NULL,
226	DA9052_ADC_VBAT);
227	static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL,
228	DA9052_ADC_VBAT);
229	static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_read_misc_channel, NULL,
230	DA9052_ADC_IN4);
231	static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL,
232	DA9052_ADC_IN4);
233	static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_read_misc_channel, NULL,
234	DA9052_ADC_IN5);
235	static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL,
236	DA9052_ADC_IN5);
237	static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_read_misc_channel, NULL,
238	DA9052_ADC_IN6);
239	static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL,
240	DA9052_ADC_IN6);
241	static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, da9052_read_vbbat, NULL,
242	DA9052_ADC_VBBAT);
243	static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL,
244	DA9052_ADC_VBBAT);
245
246	static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, da9052_read_ich, NULL,
247	DA9052_ADC_ICH);
248	static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_label, NULL,
249	DA9052_ADC_ICH);
250
251	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, da9052_read_tbat, NULL,
252	DA9052_ADC_TBAT);
253	static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
254	DA9052_ADC_TBAT);
255	static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, da9052_read_tjunc, NULL,
256	DA9052_ADC_TJUNC);
257	static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_label, NULL,
258	DA9052_ADC_TJUNC);
259
260	static DEVICE_ATTR(name, S_IRUGO, da9052_hwmon_show_name, NULL);
261
262	static struct attribute *da9052_attr[] = {
263	&dev_attr_name.attr,
264	&sensor_dev_attr_in0_input.dev_attr.attr,
265	&sensor_dev_attr_in0_label.dev_attr.attr,
266	&sensor_dev_attr_in3_input.dev_attr.attr,
267	&sensor_dev_attr_in3_label.dev_attr.attr,
268	&sensor_dev_attr_in4_input.dev_attr.attr,
269	&sensor_dev_attr_in4_label.dev_attr.attr,
270	&sensor_dev_attr_in5_input.dev_attr.attr,
271	&sensor_dev_attr_in5_label.dev_attr.attr,
272	&sensor_dev_attr_in6_input.dev_attr.attr,
273	&sensor_dev_attr_in6_label.dev_attr.attr,
274	&sensor_dev_attr_in9_input.dev_attr.attr,
275	&sensor_dev_attr_in9_label.dev_attr.attr,
276	&sensor_dev_attr_curr1_input.dev_attr.attr,
277	&sensor_dev_attr_curr1_label.dev_attr.attr,
278	&sensor_dev_attr_temp2_input.dev_attr.attr,
279	&sensor_dev_attr_temp2_label.dev_attr.attr,
280	&sensor_dev_attr_temp8_input.dev_attr.attr,
281	&sensor_dev_attr_temp8_label.dev_attr.attr,
282	NULL
283	};
284
285	static const struct attribute_group da9052_attr_group = {.attrs = da9052_attr};
286
287	static int __devinit da9052_hwmon_probe(struct platform_device *pdev)
288	{
289	struct da9052_hwmon *hwmon;
290	int ret;
291
292	hwmon = devm_kzalloc(&pdev->dev, sizeof(struct da9052_hwmon),
293	GFP_KERNEL);
294	if (!hwmon)
295	return -ENOMEM;
296
297	mutex_init(&hwmon->hwmon_lock);
298	hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);
299
300	platform_set_drvdata(pdev, hwmon);
301
302	ret = sysfs_create_group(&pdev->dev.kobj, &da9052_attr_group);
303	if (ret)
304	goto err_mem;
305
306	hwmon->class_device = hwmon_device_register(&pdev->dev);
307	if (IS_ERR(hwmon->class_device)) {
308	ret = PTR_ERR(hwmon->class_device);
309	goto err_sysfs;
310	}
311
312	return 0;
313
314	err_sysfs:
315	sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
316	err_mem:
317	return ret;
318	}
319
320	static int __devexit da9052_hwmon_remove(struct platform_device *pdev)
321	{
322	struct da9052_hwmon *hwmon = platform_get_drvdata(pdev);
323
324	hwmon_device_unregister(hwmon->class_device);
325	sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
326
327	return 0;
328	}
329
330	static struct platform_driver da9052_hwmon_driver = {
331	.probe = da9052_hwmon_probe,
332	.remove = __devexit_p(da9052_hwmon_remove),
333	.driver = {
334	.name = "da9052-hwmon",
335	.owner = THIS_MODULE,
336	},
337	};
338
339	module_platform_driver(da9052_hwmon_driver);
340
341	MODULE_AUTHOR("David Dajun Chen <[email protected]>");
342	MODULE_DESCRIPTION("DA9052 HWMON driver");
343	MODULE_LICENSE("GPL");
344	MODULE_ALIAS("platform:da9052-hwmon");