[linux-2.6-block.git] / drivers / hwmon / powr1220.c

/*
 * powr1220.c - Driver for the Lattice POWR1220 programmable power supply
 * and monitor. Users can read all ADC inputs along with their labels
 * using the sysfs nodes.
 *
 * Copyright (c) 2014 Echo360 http://www.echo360.com
 * Scott Kanowitz <skanowitz@echo360.com> <scott.kanowitz@gmail.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.
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/delay.h>

#define ADC_STEP_MV			2
#define ADC_MAX_LOW_MEASUREMENT_MV	2000

enum powr1220_regs {
	VMON_STATUS0,
	VMON_STATUS1,
	VMON_STATUS2,
	OUTPUT_STATUS0,
	OUTPUT_STATUS1,
	OUTPUT_STATUS2,
	INPUT_STATUS,
	ADC_VALUE_LOW,
	ADC_VALUE_HIGH,
	ADC_MUX,
	UES_BYTE0,
	UES_BYTE1,
	UES_BYTE2,
	UES_BYTE3,
	GP_OUTPUT1,
	GP_OUTPUT2,
	GP_OUTPUT3,
	INPUT_VALUE,
	RESET,
	TRIM1_TRIM,
	TRIM2_TRIM,
	TRIM3_TRIM,
	TRIM4_TRIM,
	TRIM5_TRIM,
	TRIM6_TRIM,
	TRIM7_TRIM,
	TRIM8_TRIM,
	MAX_POWR1220_REGS
};

enum powr1220_adc_values {
	VMON1,
	VMON2,
	VMON3,
	VMON4,
	VMON5,
	VMON6,
	VMON7,
	VMON8,
	VMON9,
	VMON10,
	VMON11,
	VMON12,
	VCCA,
	VCCINP,
	MAX_POWR1220_ADC_VALUES
};

struct powr1220_data {
	struct i2c_client *client;
	struct mutex update_lock;
	bool adc_valid[MAX_POWR1220_ADC_VALUES];
	 /* the next value is in jiffies */
	unsigned long adc_last_updated[MAX_POWR1220_ADC_VALUES];

	/* values */
	int adc_maxes[MAX_POWR1220_ADC_VALUES];
	int adc_values[MAX_POWR1220_ADC_VALUES];
};

static const char * const input_names[] = {
	[VMON1]    = "vmon1",
	[VMON2]    = "vmon2",
	[VMON3]    = "vmon3",
	[VMON4]    = "vmon4",
	[VMON5]    = "vmon5",
	[VMON6]    = "vmon6",
	[VMON7]    = "vmon7",
	[VMON8]    = "vmon8",
	[VMON9]    = "vmon9",
	[VMON10]   = "vmon10",
	[VMON11]   = "vmon11",
	[VMON12]   = "vmon12",
	[VCCA]     = "vcca",
	[VCCINP]   = "vccinp",
};

/* Reads the specified ADC channel */
static int powr1220_read_adc(struct device *dev, int ch_num)
{
	struct powr1220_data *data = dev_get_drvdata(dev);
	int reading;
	int result;
	int adc_range = 0;

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->adc_last_updated[ch_num] + HZ) ||
			!data->adc_valid[ch_num]) {
		/*
		 * figure out if we need to use the attenuator for
		 * high inputs or inputs that we don't yet have a measurement
		 * for. We dynamically set the attenuator depending on the
		 * max reading.
		 */
		if (data->adc_maxes[ch_num] > ADC_MAX_LOW_MEASUREMENT_MV ||
				data->adc_maxes[ch_num] == 0)
			adc_range = 1 << 4;

		/* set the attenuator and mux */
		result = i2c_smbus_write_byte_data(data->client, ADC_MUX,
				adc_range | ch_num);
		if (result)
			goto exit;

		/*
		 * wait at least Tconvert time (200 us) for the
		 * conversion to complete
		 */
		udelay(200);

		/* get the ADC reading */
		result = i2c_smbus_read_byte_data(data->client, ADC_VALUE_LOW);
		if (result < 0)
			goto exit;

		reading = result >> 4;

		/* get the upper half of the reading */
		result = i2c_smbus_read_byte_data(data->client, ADC_VALUE_HIGH);
		if (result < 0)
			goto exit;

		reading |= result << 4;

		/* now convert the reading to a voltage */
		reading *= ADC_STEP_MV;
		data->adc_values[ch_num] = reading;
		data->adc_valid[ch_num] = true;
		data->adc_last_updated[ch_num] = jiffies;
		result = reading;

		if (reading > data->adc_maxes[ch_num])
			data->adc_maxes[ch_num] = reading;
	} else {
		result = data->adc_values[ch_num];
	}

exit:
	mutex_unlock(&data->update_lock);

	return result;
}

/* Shows the voltage associated with the specified ADC channel */
static ssize_t powr1220_voltage_show(struct device *dev,
				     struct device_attribute *dev_attr,
				     char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
	int adc_val = powr1220_read_adc(dev, attr->index);

	if (adc_val < 0)
		return adc_val;

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

/* Shows the maximum setting associated with the specified ADC channel */
static ssize_t powr1220_max_show(struct device *dev,
				 struct device_attribute *dev_attr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
	struct powr1220_data *data = dev_get_drvdata(dev);

	return sprintf(buf, "%d\n", data->adc_maxes[attr->index]);
}

/* Shows the label associated with the specified ADC channel */
static ssize_t powr1220_label_show(struct device *dev,
				   struct device_attribute *dev_attr,
				   char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);

	return sprintf(buf, "%s\n", input_names[attr->index]);
}

static SENSOR_DEVICE_ATTR_RO(in0_input, powr1220_voltage, VMON1);
static SENSOR_DEVICE_ATTR_RO(in1_input, powr1220_voltage, VMON2);
static SENSOR_DEVICE_ATTR_RO(in2_input, powr1220_voltage, VMON3);
static SENSOR_DEVICE_ATTR_RO(in3_input, powr1220_voltage, VMON4);
static SENSOR_DEVICE_ATTR_RO(in4_input, powr1220_voltage, VMON5);
static SENSOR_DEVICE_ATTR_RO(in5_input, powr1220_voltage, VMON6);
static SENSOR_DEVICE_ATTR_RO(in6_input, powr1220_voltage, VMON7);
static SENSOR_DEVICE_ATTR_RO(in7_input, powr1220_voltage, VMON8);
static SENSOR_DEVICE_ATTR_RO(in8_input, powr1220_voltage, VMON9);
static SENSOR_DEVICE_ATTR_RO(in9_input, powr1220_voltage, VMON10);
static SENSOR_DEVICE_ATTR_RO(in10_input, powr1220_voltage, VMON11);
static SENSOR_DEVICE_ATTR_RO(in11_input, powr1220_voltage, VMON12);
static SENSOR_DEVICE_ATTR_RO(in12_input, powr1220_voltage, VCCA);
static SENSOR_DEVICE_ATTR_RO(in13_input, powr1220_voltage, VCCINP);

static SENSOR_DEVICE_ATTR_RO(in0_highest, powr1220_max, VMON1);
static SENSOR_DEVICE_ATTR_RO(in1_highest, powr1220_max, VMON2);
static SENSOR_DEVICE_ATTR_RO(in2_highest, powr1220_max, VMON3);
static SENSOR_DEVICE_ATTR_RO(in3_highest, powr1220_max, VMON4);
static SENSOR_DEVICE_ATTR_RO(in4_highest, powr1220_max, VMON5);
static SENSOR_DEVICE_ATTR_RO(in5_highest, powr1220_max, VMON6);
static SENSOR_DEVICE_ATTR_RO(in6_highest, powr1220_max, VMON7);
static SENSOR_DEVICE_ATTR_RO(in7_highest, powr1220_max, VMON8);
static SENSOR_DEVICE_ATTR_RO(in8_highest, powr1220_max, VMON9);
static SENSOR_DEVICE_ATTR_RO(in9_highest, powr1220_max, VMON10);
static SENSOR_DEVICE_ATTR_RO(in10_highest, powr1220_max, VMON11);
static SENSOR_DEVICE_ATTR_RO(in11_highest, powr1220_max, VMON12);
static SENSOR_DEVICE_ATTR_RO(in12_highest, powr1220_max, VCCA);
static SENSOR_DEVICE_ATTR_RO(in13_highest, powr1220_max, VCCINP);

static SENSOR_DEVICE_ATTR_RO(in0_label, powr1220_label, VMON1);
static SENSOR_DEVICE_ATTR_RO(in1_label, powr1220_label, VMON2);
static SENSOR_DEVICE_ATTR_RO(in2_label, powr1220_label, VMON3);
static SENSOR_DEVICE_ATTR_RO(in3_label, powr1220_label, VMON4);
static SENSOR_DEVICE_ATTR_RO(in4_label, powr1220_label, VMON5);
static SENSOR_DEVICE_ATTR_RO(in5_label, powr1220_label, VMON6);
static SENSOR_DEVICE_ATTR_RO(in6_label, powr1220_label, VMON7);
static SENSOR_DEVICE_ATTR_RO(in7_label, powr1220_label, VMON8);
static SENSOR_DEVICE_ATTR_RO(in8_label, powr1220_label, VMON9);
static SENSOR_DEVICE_ATTR_RO(in9_label, powr1220_label, VMON10);
static SENSOR_DEVICE_ATTR_RO(in10_label, powr1220_label, VMON11);
static SENSOR_DEVICE_ATTR_RO(in11_label, powr1220_label, VMON12);
static SENSOR_DEVICE_ATTR_RO(in12_label, powr1220_label, VCCA);
static SENSOR_DEVICE_ATTR_RO(in13_label, powr1220_label, VCCINP);

static struct attribute *powr1220_attrs[] = {
	&sensor_dev_attr_in0_input.dev_attr.attr,
	&sensor_dev_attr_in1_input.dev_attr.attr,
	&sensor_dev_attr_in2_input.dev_attr.attr,
	&sensor_dev_attr_in3_input.dev_attr.attr,
	&sensor_dev_attr_in4_input.dev_attr.attr,
	&sensor_dev_attr_in5_input.dev_attr.attr,
	&sensor_dev_attr_in6_input.dev_attr.attr,
	&sensor_dev_attr_in7_input.dev_attr.attr,
	&sensor_dev_attr_in8_input.dev_attr.attr,
	&sensor_dev_attr_in9_input.dev_attr.attr,
	&sensor_dev_attr_in10_input.dev_attr.attr,
	&sensor_dev_attr_in11_input.dev_attr.attr,
	&sensor_dev_attr_in12_input.dev_attr.attr,
	&sensor_dev_attr_in13_input.dev_attr.attr,

	&sensor_dev_attr_in0_highest.dev_attr.attr,
	&sensor_dev_attr_in1_highest.dev_attr.attr,
	&sensor_dev_attr_in2_highest.dev_attr.attr,
	&sensor_dev_attr_in3_highest.dev_attr.attr,
	&sensor_dev_attr_in4_highest.dev_attr.attr,
	&sensor_dev_attr_in5_highest.dev_attr.attr,
	&sensor_dev_attr_in6_highest.dev_attr.attr,
	&sensor_dev_attr_in7_highest.dev_attr.attr,
	&sensor_dev_attr_in8_highest.dev_attr.attr,
	&sensor_dev_attr_in9_highest.dev_attr.attr,
	&sensor_dev_attr_in10_highest.dev_attr.attr,
	&sensor_dev_attr_in11_highest.dev_attr.attr,
	&sensor_dev_attr_in12_highest.dev_attr.attr,
	&sensor_dev_attr_in13_highest.dev_attr.attr,

	&sensor_dev_attr_in0_label.dev_attr.attr,
	&sensor_dev_attr_in1_label.dev_attr.attr,
	&sensor_dev_attr_in2_label.dev_attr.attr,
	&sensor_dev_attr_in3_label.dev_attr.attr,
	&sensor_dev_attr_in4_label.dev_attr.attr,
	&sensor_dev_attr_in5_label.dev_attr.attr,
	&sensor_dev_attr_in6_label.dev_attr.attr,
	&sensor_dev_attr_in7_label.dev_attr.attr,
	&sensor_dev_attr_in8_label.dev_attr.attr,
	&sensor_dev_attr_in9_label.dev_attr.attr,
	&sensor_dev_attr_in10_label.dev_attr.attr,
	&sensor_dev_attr_in11_label.dev_attr.attr,
	&sensor_dev_attr_in12_label.dev_attr.attr,
	&sensor_dev_attr_in13_label.dev_attr.attr,

	NULL
};

ATTRIBUTE_GROUPS(powr1220);

static int powr1220_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
{
	struct powr1220_data *data;
	struct device *hwmon_dev;

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -ENODEV;

	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	mutex_init(&data->update_lock);
	data->client = client;

	hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
			client->name, data, powr1220_groups);

	return PTR_ERR_OR_ZERO(hwmon_dev);
}

static const struct i2c_device_id powr1220_ids[] = {
	{ "powr1220", 0, },
	{ }
};

MODULE_DEVICE_TABLE(i2c, powr1220_ids);

static struct i2c_driver powr1220_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name	= "powr1220",
	},
	.probe		= powr1220_probe,
	.id_table	= powr1220_ids,
};

module_i2c_driver(powr1220_driver);

MODULE_AUTHOR("Scott Kanowitz");
MODULE_DESCRIPTION("POWR1220 driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
f4ff4155 SK	1	/*
	2	* powr1220.c - Driver for the Lattice POWR1220 programmable power supply
	3	* and monitor. Users can read all ADC inputs along with their labels
	4	* using the sysfs nodes.
	5	*
	6	* Copyright (c) 2014 Echo360 http://www.echo360.com
	7	* Scott Kanowitz <skanowitz@echo360.com> <scott.kanowitz@gmail.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*/
	19
	20	#include <linux/module.h>
	21	#include <linux/init.h>
	22	#include <linux/slab.h>
	23	#include <linux/jiffies.h>
	24	#include <linux/i2c.h>
	25	#include <linux/hwmon.h>
	26	#include <linux/hwmon-sysfs.h>
	27	#include <linux/err.h>
	28	#include <linux/mutex.h>
	29	#include <linux/delay.h>
	30
	31	#define ADC_STEP_MV 2
	32	#define ADC_MAX_LOW_MEASUREMENT_MV 2000
	33
	34	enum powr1220_regs {
	35	VMON_STATUS0,
	36	VMON_STATUS1,
	37	VMON_STATUS2,
	38	OUTPUT_STATUS0,
	39	OUTPUT_STATUS1,
	40	OUTPUT_STATUS2,
	41	INPUT_STATUS,
	42	ADC_VALUE_LOW,
	43	ADC_VALUE_HIGH,
	44	ADC_MUX,
	45	UES_BYTE0,
	46	UES_BYTE1,
	47	UES_BYTE2,
	48	UES_BYTE3,
	49	GP_OUTPUT1,
	50	GP_OUTPUT2,
	51	GP_OUTPUT3,
	52	INPUT_VALUE,
	53	RESET,
	54	TRIM1_TRIM,
	55	TRIM2_TRIM,
	56	TRIM3_TRIM,
	57	TRIM4_TRIM,
	58	TRIM5_TRIM,
	59	TRIM6_TRIM,
	60	TRIM7_TRIM,
	61	TRIM8_TRIM,
	62	MAX_POWR1220_REGS
	63	};
	64
65	enum powr1220_adc_values {
66	VMON1,
67	VMON2,
68	VMON3,
69	VMON4,
70	VMON5,
71	VMON6,
72	VMON7,
73	VMON8,
74	VMON9,
75	VMON10,
76	VMON11,
77	VMON12,
78	VCCA,
79	VCCINP,
80	MAX_POWR1220_ADC_VALUES
81	};
82
83	struct powr1220_data {
84	struct i2c_client *client;
85	struct mutex update_lock;
86	bool adc_valid[MAX_POWR1220_ADC_VALUES];
87	/* the next value is in jiffies */
88	unsigned long adc_last_updated[MAX_POWR1220_ADC_VALUES];
89
90	/* values */
91	int adc_maxes[MAX_POWR1220_ADC_VALUES];
92	int adc_values[MAX_POWR1220_ADC_VALUES];
93	};
94
95	static const char * const input_names[] = {
96	[VMON1] = "vmon1",
97	[VMON2] = "vmon2",
98	[VMON3] = "vmon3",
99	[VMON4] = "vmon4",
100	[VMON5] = "vmon5",
101	[VMON6] = "vmon6",
102	[VMON7] = "vmon7",
103	[VMON8] = "vmon8",
104	[VMON9] = "vmon9",
105	[VMON10] = "vmon10",
106	[VMON11] = "vmon11",
107	[VMON12] = "vmon12",
108	[VCCA] = "vcca",
109	[VCCINP] = "vccinp",
110	};
111
112	/* Reads the specified ADC channel */
113	static int powr1220_read_adc(struct device *dev, int ch_num)
114	{
115	struct powr1220_data *data = dev_get_drvdata(dev);
116	int reading;
117	int result;
118	int adc_range = 0;
119
120	mutex_lock(&data->update_lock);
121
122	if (time_after(jiffies, data->adc_last_updated[ch_num] + HZ) \|\|
123	!data->adc_valid[ch_num]) {
124	/*
125	* figure out if we need to use the attenuator for
126	* high inputs or inputs that we don't yet have a measurement
127	* for. We dynamically set the attenuator depending on the
128	* max reading.
129	*/
130	if (data->adc_maxes[ch_num] > ADC_MAX_LOW_MEASUREMENT_MV \|\|
131	data->adc_maxes[ch_num] == 0)
132	adc_range = 1 << 4;
133
134	/* set the attenuator and mux */
135	result = i2c_smbus_write_byte_data(data->client, ADC_MUX,
136	adc_range \| ch_num);
137	if (result)
138	goto exit;
139
140	/*
141	* wait at least Tconvert time (200 us) for the
142	* conversion to complete
143	*/
144	udelay(200);
145
146	/* get the ADC reading */
147	result = i2c_smbus_read_byte_data(data->client, ADC_VALUE_LOW);
148	if (result < 0)
149	goto exit;
150
151	reading = result >> 4;
152
153	/* get the upper half of the reading */
154	result = i2c_smbus_read_byte_data(data->client, ADC_VALUE_HIGH);
155	if (result < 0)
156	goto exit;
157
158	reading \|= result << 4;
159
160	/* now convert the reading to a voltage */
161	reading *= ADC_STEP_MV;
162	data->adc_values[ch_num] = reading;
163	data->adc_valid[ch_num] = true;
164	data->adc_last_updated[ch_num] = jiffies;
165	result = reading;
166
167	if (reading > data->adc_maxes[ch_num])
168	data->adc_maxes[ch_num] = reading;
169	} else {
170	result = data->adc_values[ch_num];
171	}
172
173	exit:
174	mutex_unlock(&data->update_lock);
175
176	return result;
177	}
178
179	/* Shows the voltage associated with the specified ADC channel */
e3a0ee1a GR	180	static ssize_t powr1220_voltage_show(struct device *dev,
	181	struct device_attribute *dev_attr,
	182	char *buf)
f4ff4155 SK	183	{
	184	struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
	185	int adc_val = powr1220_read_adc(dev, attr->index);
	186
	187	if (adc_val < 0)
	188	return adc_val;
	189
	190	return sprintf(buf, "%d\n", adc_val);
	191	}
	192
	193	/* Shows the maximum setting associated with the specified ADC channel */
e3a0ee1a GR	194	static ssize_t powr1220_max_show(struct device *dev,
e3a0ee1a GR	195	struct device_attribute dev_attr, char buf)
f4ff4155 SK	196	{
	197	struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
	198	struct powr1220_data *data = dev_get_drvdata(dev);
	199
	200	return sprintf(buf, "%d\n", data->adc_maxes[attr->index]);
	201	}
	202
	203	/* Shows the label associated with the specified ADC channel */
e3a0ee1a GR	204	static ssize_t powr1220_label_show(struct device *dev,
	205	struct device_attribute *dev_attr,
	206	char *buf)
f4ff4155 SK	207	{
	208	struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
	209
	210	return sprintf(buf, "%s\n", input_names[attr->index]);
	211	}
	212
e3a0ee1a GR	213	static SENSOR_DEVICE_ATTR_RO(in0_input, powr1220_voltage, VMON1);
	214	static SENSOR_DEVICE_ATTR_RO(in1_input, powr1220_voltage, VMON2);
	215	static SENSOR_DEVICE_ATTR_RO(in2_input, powr1220_voltage, VMON3);
	216	static SENSOR_DEVICE_ATTR_RO(in3_input, powr1220_voltage, VMON4);
	217	static SENSOR_DEVICE_ATTR_RO(in4_input, powr1220_voltage, VMON5);
	218	static SENSOR_DEVICE_ATTR_RO(in5_input, powr1220_voltage, VMON6);
	219	static SENSOR_DEVICE_ATTR_RO(in6_input, powr1220_voltage, VMON7);
	220	static SENSOR_DEVICE_ATTR_RO(in7_input, powr1220_voltage, VMON8);
	221	static SENSOR_DEVICE_ATTR_RO(in8_input, powr1220_voltage, VMON9);
	222	static SENSOR_DEVICE_ATTR_RO(in9_input, powr1220_voltage, VMON10);
	223	static SENSOR_DEVICE_ATTR_RO(in10_input, powr1220_voltage, VMON11);
	224	static SENSOR_DEVICE_ATTR_RO(in11_input, powr1220_voltage, VMON12);
	225	static SENSOR_DEVICE_ATTR_RO(in12_input, powr1220_voltage, VCCA);
	226	static SENSOR_DEVICE_ATTR_RO(in13_input, powr1220_voltage, VCCINP);
	227
	228	static SENSOR_DEVICE_ATTR_RO(in0_highest, powr1220_max, VMON1);
	229	static SENSOR_DEVICE_ATTR_RO(in1_highest, powr1220_max, VMON2);
	230	static SENSOR_DEVICE_ATTR_RO(in2_highest, powr1220_max, VMON3);
	231	static SENSOR_DEVICE_ATTR_RO(in3_highest, powr1220_max, VMON4);
	232	static SENSOR_DEVICE_ATTR_RO(in4_highest, powr1220_max, VMON5);
	233	static SENSOR_DEVICE_ATTR_RO(in5_highest, powr1220_max, VMON6);
	234	static SENSOR_DEVICE_ATTR_RO(in6_highest, powr1220_max, VMON7);
	235	static SENSOR_DEVICE_ATTR_RO(in7_highest, powr1220_max, VMON8);
	236	static SENSOR_DEVICE_ATTR_RO(in8_highest, powr1220_max, VMON9);
	237	static SENSOR_DEVICE_ATTR_RO(in9_highest, powr1220_max, VMON10);
	238	static SENSOR_DEVICE_ATTR_RO(in10_highest, powr1220_max, VMON11);
	239	static SENSOR_DEVICE_ATTR_RO(in11_highest, powr1220_max, VMON12);
	240	static SENSOR_DEVICE_ATTR_RO(in12_highest, powr1220_max, VCCA);
	241	static SENSOR_DEVICE_ATTR_RO(in13_highest, powr1220_max, VCCINP);
	242
	243	static SENSOR_DEVICE_ATTR_RO(in0_label, powr1220_label, VMON1);
	244	static SENSOR_DEVICE_ATTR_RO(in1_label, powr1220_label, VMON2);
	245	static SENSOR_DEVICE_ATTR_RO(in2_label, powr1220_label, VMON3);
	246	static SENSOR_DEVICE_ATTR_RO(in3_label, powr1220_label, VMON4);
	247	static SENSOR_DEVICE_ATTR_RO(in4_label, powr1220_label, VMON5);
	248	static SENSOR_DEVICE_ATTR_RO(in5_label, powr1220_label, VMON6);
	249	static SENSOR_DEVICE_ATTR_RO(in6_label, powr1220_label, VMON7);
	250	static SENSOR_DEVICE_ATTR_RO(in7_label, powr1220_label, VMON8);
	251	static SENSOR_DEVICE_ATTR_RO(in8_label, powr1220_label, VMON9);
	252	static SENSOR_DEVICE_ATTR_RO(in9_label, powr1220_label, VMON10);
	253	static SENSOR_DEVICE_ATTR_RO(in10_label, powr1220_label, VMON11);
	254	static SENSOR_DEVICE_ATTR_RO(in11_label, powr1220_label, VMON12);
	255	static SENSOR_DEVICE_ATTR_RO(in12_label, powr1220_label, VCCA);
	256	static SENSOR_DEVICE_ATTR_RO(in13_label, powr1220_label, VCCINP);
f4ff4155 SK	257
	258	static struct attribute *powr1220_attrs[] = {
	259	&sensor_dev_attr_in0_input.dev_attr.attr,
	260	&sensor_dev_attr_in1_input.dev_attr.attr,
	261	&sensor_dev_attr_in2_input.dev_attr.attr,
	262	&sensor_dev_attr_in3_input.dev_attr.attr,
	263	&sensor_dev_attr_in4_input.dev_attr.attr,
	264	&sensor_dev_attr_in5_input.dev_attr.attr,
	265	&sensor_dev_attr_in6_input.dev_attr.attr,
	266	&sensor_dev_attr_in7_input.dev_attr.attr,
	267	&sensor_dev_attr_in8_input.dev_attr.attr,
	268	&sensor_dev_attr_in9_input.dev_attr.attr,
	269	&sensor_dev_attr_in10_input.dev_attr.attr,
	270	&sensor_dev_attr_in11_input.dev_attr.attr,
	271	&sensor_dev_attr_in12_input.dev_attr.attr,
	272	&sensor_dev_attr_in13_input.dev_attr.attr,
	273
	274	&sensor_dev_attr_in0_highest.dev_attr.attr,
	275	&sensor_dev_attr_in1_highest.dev_attr.attr,
	276	&sensor_dev_attr_in2_highest.dev_attr.attr,
	277	&sensor_dev_attr_in3_highest.dev_attr.attr,
	278	&sensor_dev_attr_in4_highest.dev_attr.attr,
	279	&sensor_dev_attr_in5_highest.dev_attr.attr,
	280	&sensor_dev_attr_in6_highest.dev_attr.attr,
	281	&sensor_dev_attr_in7_highest.dev_attr.attr,
	282	&sensor_dev_attr_in8_highest.dev_attr.attr,
	283	&sensor_dev_attr_in9_highest.dev_attr.attr,
	284	&sensor_dev_attr_in10_highest.dev_attr.attr,
	285	&sensor_dev_attr_in11_highest.dev_attr.attr,
	286	&sensor_dev_attr_in12_highest.dev_attr.attr,
	287	&sensor_dev_attr_in13_highest.dev_attr.attr,
	288
	289	&sensor_dev_attr_in0_label.dev_attr.attr,
	290	&sensor_dev_attr_in1_label.dev_attr.attr,
	291	&sensor_dev_attr_in2_label.dev_attr.attr,
	292	&sensor_dev_attr_in3_label.dev_attr.attr,
	293	&sensor_dev_attr_in4_label.dev_attr.attr,
	294	&sensor_dev_attr_in5_label.dev_attr.attr,
	295	&sensor_dev_attr_in6_label.dev_attr.attr,
	296	&sensor_dev_attr_in7_label.dev_attr.attr,
	297	&sensor_dev_attr_in8_label.dev_attr.attr,
	298	&sensor_dev_attr_in9_label.dev_attr.attr,
	299	&sensor_dev_attr_in10_label.dev_attr.attr,
	300	&sensor_dev_attr_in11_label.dev_attr.attr,
	301	&sensor_dev_attr_in12_label.dev_attr.attr,
	302	&sensor_dev_attr_in13_label.dev_attr.attr,
	303
	304	NULL
	305	};
	306
	307	ATTRIBUTE_GROUPS(powr1220);
	308
	309	static int powr1220_probe(struct i2c_client *client,
	310	const struct i2c_device_id *id)
	311	{
	312	struct powr1220_data *data;
	313	struct device *hwmon_dev;
	314
	315	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	316	return -ENODEV;
	317
	318	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
	319	if (!data)
	320	return -ENOMEM;
321
322	mutex_init(&data->update_lock);
323	data->client = client;
324
325	hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
326	client->name, data, powr1220_groups);
327
328	return PTR_ERR_OR_ZERO(hwmon_dev);
329	}
330
331	static const struct i2c_device_id powr1220_ids[] = {
332	{ "powr1220", 0, },
333	{ }
334	};
335
336	MODULE_DEVICE_TABLE(i2c, powr1220_ids);
337
338	static struct i2c_driver powr1220_driver = {
339	.class = I2C_CLASS_HWMON,
340	.driver = {
341	.name = "powr1220",
342	},
343	.probe = powr1220_probe,
344	.id_table = powr1220_ids,
345	};
346
347	module_i2c_driver(powr1220_driver);
348
349	MODULE_AUTHOR("Scott Kanowitz");
350	MODULE_DESCRIPTION("POWR1220 driver");
351	MODULE_LICENSE("GPL");