[linux-2.6-block.git] / drivers / hwmon / da9052-hwmon.c

/*
 * HWMON Driver for Dialog DA9052
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <dchen@diasemi.com>
 *
 *  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 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 = da9052_hwmon_remove,
	.driver = {
		.name = "da9052-hwmon",
		.owner = THIS_MODULE,
	},
};

module_platform_driver(da9052_hwmon_driver);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
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 <dchen@diasemi.com>
	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 */
	46	static inline int volt_reg_to_mV(int value)
	47	{
	48	return DIV_ROUND_CLOSEST(value * 1000, 512) + 2500;
	49	}
	50
	51	/* Conversion function for ADC channels 4, 5 and 6 */
	52	static inline int input_reg_to_mV(int value)
	53	{
	54	return DIV_ROUND_CLOSEST(value * 2500, 1023);
	55	}
	56
	57	/* Conversion function for VBBAT */
	58	static inline int vbbat_reg_to_mV(int value)
	59	{
	60	return DIV_ROUND_CLOSEST(value * 2500, 512);
	61	}
	62
	63	static int da9052_enable_vddout_channel(struct da9052 *da9052)
	64	{
	65	int ret;
	66
	67	ret = da9052_reg_read(da9052, DA9052_ADC_CONT_REG);
	68	if (ret < 0)
	69	return ret;
	70
	71	ret \|= DA9052_ADCCONT_AUTOVDDEN;
	72
	73	return da9052_reg_write(da9052, DA9052_ADC_CONT_REG, ret);
	74	}
	75
	76	static int da9052_disable_vddout_channel(struct da9052 *da9052)
	77	{
	78	int ret;
79
80	ret = da9052_reg_read(da9052, DA9052_ADC_CONT_REG);
81	if (ret < 0)
82	return ret;
83
84	ret &= ~DA9052_ADCCONT_AUTOVDDEN;
85
86	return da9052_reg_write(da9052, DA9052_ADC_CONT_REG, ret);
87	}
88
89	static ssize_t da9052_read_vddout(struct device *dev,
90	struct device_attribute devattr, char buf)
91	{
92	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
93	int ret, vdd;
94
95	mutex_lock(&hwmon->hwmon_lock);
96
97	ret = da9052_enable_vddout_channel(hwmon->da9052);
98	if (ret < 0)
99	goto hwmon_err;
100
101	vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG);
102	if (vdd < 0) {
103	ret = vdd;
104	goto hwmon_err_release;
105	}
106
107	ret = da9052_disable_vddout_channel(hwmon->da9052);
108	if (ret < 0)
109	goto hwmon_err;
110
111	mutex_unlock(&hwmon->hwmon_lock);
112	return sprintf(buf, "%d\n", volt_reg_to_mV(vdd));
113
114	hwmon_err_release:
115	da9052_disable_vddout_channel(hwmon->da9052);
116	hwmon_err:
117	mutex_unlock(&hwmon->hwmon_lock);
118	return ret;
119	}
120
121	static ssize_t da9052_read_ich(struct device *dev,
122	struct device_attribute devattr, char buf)
123	{
124	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
125	int ret;
126
127	ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG);
128	if (ret < 0)
129	return ret;
130
131	/* Equivalent to 3.9mA/bit in register ICHG_AV */
132	return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
133	}
134
135	static ssize_t da9052_read_tbat(struct device *dev,
136	struct device_attribute devattr, char buf)
137	{
138	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
139
140	return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
141	}
142
143	static ssize_t da9052_read_vbat(struct device *dev,
144	struct device_attribute devattr, char buf)
145	{
146	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
147	int ret;
148
149	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT);
150	if (ret < 0)
151	return ret;
152
153	return sprintf(buf, "%d\n", volt_reg_to_mV(ret));
154	}
155
156	static ssize_t da9052_read_misc_channel(struct device *dev,
157	struct device_attribute *devattr,
158	char *buf)
159	{
160	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
161	int channel = to_sensor_dev_attr(devattr)->index;
162	int ret;
163
164	ret = da9052_adc_manual_read(hwmon->da9052, channel);
165	if (ret < 0)
166	return ret;
167
168	return sprintf(buf, "%d\n", input_reg_to_mV(ret));
169	}
170
171	static ssize_t da9052_read_tjunc(struct device *dev,
172	struct device_attribute devattr, char buf)
173	{
174	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
175	int tjunc;
176	int toffset;
177
178	tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG);
179	if (tjunc < 0)
180	return tjunc;
181
182	toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG);
183	if (toffset < 0)
184	return toffset;
185
186	/*
187	* Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8
188	* T_OFFSET is a trim value used to improve accuracy of the result
189	*/
190	return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
191	}
192
193	static ssize_t da9052_read_vbbat(struct device *dev,
194	struct device_attribute devattr, char buf)
195	{
196	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
197	int ret;
198
199	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT);
200	if (ret < 0)
201	return ret;
202
203	return sprintf(buf, "%d\n", vbbat_reg_to_mV(ret));
204	}
205
206	static ssize_t da9052_hwmon_show_name(struct device *dev,
207	struct device_attribute *devattr,
208	char *buf)
209	{
210	return sprintf(buf, "da9052-hwmon\n");
211	}
212
213	static ssize_t show_label(struct device *dev,
214	struct device_attribute devattr, char buf)
215	{
216	return sprintf(buf, "%s\n",
217	input_names[to_sensor_dev_attr(devattr)->index]);
218	}
219
220	static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, da9052_read_vddout, NULL,
221	DA9052_ADC_VDDOUT);
222	static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL,
223	DA9052_ADC_VDDOUT);
224	static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, da9052_read_vbat, NULL,
225	DA9052_ADC_VBAT);
226	static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL,
227	DA9052_ADC_VBAT);
228	static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_read_misc_channel, NULL,
229	DA9052_ADC_IN4);
230	static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL,
231	DA9052_ADC_IN4);
232	static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_read_misc_channel, NULL,
233	DA9052_ADC_IN5);
234	static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL,
235	DA9052_ADC_IN5);
236	static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_read_misc_channel, NULL,
237	DA9052_ADC_IN6);
238	static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL,
239	DA9052_ADC_IN6);
240	static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, da9052_read_vbbat, NULL,
241	DA9052_ADC_VBBAT);
242	static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL,
243	DA9052_ADC_VBBAT);
244
245	static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, da9052_read_ich, NULL,
246	DA9052_ADC_ICH);
247	static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_label, NULL,
248	DA9052_ADC_ICH);
249
250	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, da9052_read_tbat, NULL,
251	DA9052_ADC_TBAT);
252	static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
253	DA9052_ADC_TBAT);
254	static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, da9052_read_tjunc, NULL,
255	DA9052_ADC_TJUNC);
256	static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_label, NULL,
257	DA9052_ADC_TJUNC);
258
259	static DEVICE_ATTR(name, S_IRUGO, da9052_hwmon_show_name, NULL);
260
261	static struct attribute *da9052_attr[] = {
262	&dev_attr_name.attr,
263	&sensor_dev_attr_in0_input.dev_attr.attr,
264	&sensor_dev_attr_in0_label.dev_attr.attr,
265	&sensor_dev_attr_in3_input.dev_attr.attr,
266	&sensor_dev_attr_in3_label.dev_attr.attr,
267	&sensor_dev_attr_in4_input.dev_attr.attr,
268	&sensor_dev_attr_in4_label.dev_attr.attr,
269	&sensor_dev_attr_in5_input.dev_attr.attr,
270	&sensor_dev_attr_in5_label.dev_attr.attr,
271	&sensor_dev_attr_in6_input.dev_attr.attr,
272	&sensor_dev_attr_in6_label.dev_attr.attr,
273	&sensor_dev_attr_in9_input.dev_attr.attr,
274	&sensor_dev_attr_in9_label.dev_attr.attr,
275	&sensor_dev_attr_curr1_input.dev_attr.attr,
276	&sensor_dev_attr_curr1_label.dev_attr.attr,
277	&sensor_dev_attr_temp2_input.dev_attr.attr,
278	&sensor_dev_attr_temp2_label.dev_attr.attr,
279	&sensor_dev_attr_temp8_input.dev_attr.attr,
280	&sensor_dev_attr_temp8_label.dev_attr.attr,
281	NULL
282	};
283
284	static const struct attribute_group da9052_attr_group = {.attrs = da9052_attr};
285
286	static int __devinit da9052_hwmon_probe(struct platform_device *pdev)
287	{
288	struct da9052_hwmon *hwmon;
289	int ret;
290
291	hwmon = devm_kzalloc(&pdev->dev, sizeof(struct da9052_hwmon),
292	GFP_KERNEL);
293	if (!hwmon)
294	return -ENOMEM;
295
296	mutex_init(&hwmon->hwmon_lock);
297	hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);
298
299	platform_set_drvdata(pdev, hwmon);
300
301	ret = sysfs_create_group(&pdev->dev.kobj, &da9052_attr_group);
302	if (ret)
303	goto err_mem;
304
305	hwmon->class_device = hwmon_device_register(&pdev->dev);
306	if (IS_ERR(hwmon->class_device)) {
307	ret = PTR_ERR(hwmon->class_device);
308	goto err_sysfs;
309	}
310
311	return 0;
312
313	err_sysfs:
314	sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
315	err_mem:
316	return ret;
317	}
318
319	static int __devexit da9052_hwmon_remove(struct platform_device *pdev)
320	{
321	struct da9052_hwmon *hwmon = platform_get_drvdata(pdev);
322
323	hwmon_device_unregister(hwmon->class_device);
324	sysfs_remove_group(&pdev->dev.kobj, &da9052_attr_group);
325
326	return 0;
327	}
328
329	static struct platform_driver da9052_hwmon_driver = {
330	.probe = da9052_hwmon_probe,
9e5e9b7a	331	.remove = da9052_hwmon_remove,
e41f6432 AJ	332	.driver = {
	333	.name = "da9052-hwmon",
	334	.owner = THIS_MODULE,
	335	},
	336	};
	337
	338	module_platform_driver(da9052_hwmon_driver);
	339
	340	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	341	MODULE_DESCRIPTION("DA9052 HWMON driver");
	342	MODULE_LICENSE("GPL");
	343	MODULE_ALIAS("platform:da9052-hwmon");