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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * powr1220.c - Driver for the Lattice POWR1220 programmable power supply
4 * and monitor. Users can read all ADC inputs along with their labels
5 * using the sysfs nodes.
6 *
7 * Copyright (c) 2014 Echo360 https://www.echo360.com
8 * Scott Kanowitz <skanowitz@echo360.com> <scott.kanowitz@gmail.com>
9 */
10
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/jiffies.h>
15#include <linux/i2c.h>
16#include <linux/hwmon.h>
17#include <linux/hwmon-sysfs.h>
18#include <linux/err.h>
19#include <linux/mutex.h>
20#include <linux/delay.h>
21
22#define ADC_STEP_MV 2
23#define ADC_MAX_LOW_MEASUREMENT_MV 2000
24
25enum powr1220_regs {
26 VMON_STATUS0,
27 VMON_STATUS1,
28 VMON_STATUS2,
29 OUTPUT_STATUS0,
30 OUTPUT_STATUS1,
31 OUTPUT_STATUS2,
32 INPUT_STATUS,
33 ADC_VALUE_LOW,
34 ADC_VALUE_HIGH,
35 ADC_MUX,
36 UES_BYTE0,
37 UES_BYTE1,
38 UES_BYTE2,
39 UES_BYTE3,
40 GP_OUTPUT1,
41 GP_OUTPUT2,
42 GP_OUTPUT3,
43 INPUT_VALUE,
44 RESET,
45 TRIM1_TRIM,
46 TRIM2_TRIM,
47 TRIM3_TRIM,
48 TRIM4_TRIM,
49 TRIM5_TRIM,
50 TRIM6_TRIM,
51 TRIM7_TRIM,
52 TRIM8_TRIM,
53 MAX_POWR1220_REGS
54};
55
56enum powr1220_adc_values {
57 VMON1,
58 VMON2,
59 VMON3,
60 VMON4,
61 VMON5,
62 VMON6,
63 VMON7,
64 VMON8,
65 VMON9,
66 VMON10,
67 VMON11,
68 VMON12,
69 VCCA,
70 VCCINP,
71 MAX_POWR1220_ADC_VALUES
72};
73
74struct powr1220_data {
75 struct i2c_client *client;
76 struct mutex update_lock;
77 bool adc_valid[MAX_POWR1220_ADC_VALUES];
78 /* the next value is in jiffies */
79 unsigned long adc_last_updated[MAX_POWR1220_ADC_VALUES];
80
81 /* values */
82 int adc_maxes[MAX_POWR1220_ADC_VALUES];
83 int adc_values[MAX_POWR1220_ADC_VALUES];
84};
85
86static const char * const input_names[] = {
87 [VMON1] = "vmon1",
88 [VMON2] = "vmon2",
89 [VMON3] = "vmon3",
90 [VMON4] = "vmon4",
91 [VMON5] = "vmon5",
92 [VMON6] = "vmon6",
93 [VMON7] = "vmon7",
94 [VMON8] = "vmon8",
95 [VMON9] = "vmon9",
96 [VMON10] = "vmon10",
97 [VMON11] = "vmon11",
98 [VMON12] = "vmon12",
99 [VCCA] = "vcca",
100 [VCCINP] = "vccinp",
101};
102
103/* Reads the specified ADC channel */
104static int powr1220_read_adc(struct device *dev, int ch_num)
105{
106 struct powr1220_data *data = dev_get_drvdata(dev);
107 int reading;
108 int result;
109 int adc_range = 0;
110
111 mutex_lock(&data->update_lock);
112
113 if (time_after(jiffies, data->adc_last_updated[ch_num] + HZ) ||
114 !data->adc_valid[ch_num]) {
115 /*
116 * figure out if we need to use the attenuator for
117 * high inputs or inputs that we don't yet have a measurement
118 * for. We dynamically set the attenuator depending on the
119 * max reading.
120 */
121 if (data->adc_maxes[ch_num] > ADC_MAX_LOW_MEASUREMENT_MV ||
122 data->adc_maxes[ch_num] == 0)
123 adc_range = 1 << 4;
124
125 /* set the attenuator and mux */
126 result = i2c_smbus_write_byte_data(data->client, ADC_MUX,
127 adc_range | ch_num);
128 if (result)
129 goto exit;
130
131 /*
132 * wait at least Tconvert time (200 us) for the
133 * conversion to complete
134 */
135 udelay(200);
136
137 /* get the ADC reading */
138 result = i2c_smbus_read_byte_data(data->client, ADC_VALUE_LOW);
139 if (result < 0)
140 goto exit;
141
142 reading = result >> 4;
143
144 /* get the upper half of the reading */
145 result = i2c_smbus_read_byte_data(data->client, ADC_VALUE_HIGH);
146 if (result < 0)
147 goto exit;
148
149 reading |= result << 4;
150
151 /* now convert the reading to a voltage */
152 reading *= ADC_STEP_MV;
153 data->adc_values[ch_num] = reading;
154 data->adc_valid[ch_num] = true;
155 data->adc_last_updated[ch_num] = jiffies;
156 result = reading;
157
158 if (reading > data->adc_maxes[ch_num])
159 data->adc_maxes[ch_num] = reading;
160 } else {
161 result = data->adc_values[ch_num];
162 }
163
164exit:
165 mutex_unlock(&data->update_lock);
166
167 return result;
168}
169
170/* Shows the voltage associated with the specified ADC channel */
171static ssize_t powr1220_voltage_show(struct device *dev,
172 struct device_attribute *dev_attr,
173 char *buf)
174{
175 struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
176 int adc_val = powr1220_read_adc(dev, attr->index);
177
178 if (adc_val < 0)
179 return adc_val;
180
181 return sprintf(buf, "%d\n", adc_val);
182}
183
184/* Shows the maximum setting associated with the specified ADC channel */
185static ssize_t powr1220_max_show(struct device *dev,
186 struct device_attribute *dev_attr, char *buf)
187{
188 struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
189 struct powr1220_data *data = dev_get_drvdata(dev);
190
191 return sprintf(buf, "%d\n", data->adc_maxes[attr->index]);
192}
193
194/* Shows the label associated with the specified ADC channel */
195static ssize_t powr1220_label_show(struct device *dev,
196 struct device_attribute *dev_attr,
197 char *buf)
198{
199 struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
200
201 return sprintf(buf, "%s\n", input_names[attr->index]);
202}
203
204static SENSOR_DEVICE_ATTR_RO(in0_input, powr1220_voltage, VMON1);
205static SENSOR_DEVICE_ATTR_RO(in1_input, powr1220_voltage, VMON2);
206static SENSOR_DEVICE_ATTR_RO(in2_input, powr1220_voltage, VMON3);
207static SENSOR_DEVICE_ATTR_RO(in3_input, powr1220_voltage, VMON4);
208static SENSOR_DEVICE_ATTR_RO(in4_input, powr1220_voltage, VMON5);
209static SENSOR_DEVICE_ATTR_RO(in5_input, powr1220_voltage, VMON6);
210static SENSOR_DEVICE_ATTR_RO(in6_input, powr1220_voltage, VMON7);
211static SENSOR_DEVICE_ATTR_RO(in7_input, powr1220_voltage, VMON8);
212static SENSOR_DEVICE_ATTR_RO(in8_input, powr1220_voltage, VMON9);
213static SENSOR_DEVICE_ATTR_RO(in9_input, powr1220_voltage, VMON10);
214static SENSOR_DEVICE_ATTR_RO(in10_input, powr1220_voltage, VMON11);
215static SENSOR_DEVICE_ATTR_RO(in11_input, powr1220_voltage, VMON12);
216static SENSOR_DEVICE_ATTR_RO(in12_input, powr1220_voltage, VCCA);
217static SENSOR_DEVICE_ATTR_RO(in13_input, powr1220_voltage, VCCINP);
218
219static SENSOR_DEVICE_ATTR_RO(in0_highest, powr1220_max, VMON1);
220static SENSOR_DEVICE_ATTR_RO(in1_highest, powr1220_max, VMON2);
221static SENSOR_DEVICE_ATTR_RO(in2_highest, powr1220_max, VMON3);
222static SENSOR_DEVICE_ATTR_RO(in3_highest, powr1220_max, VMON4);
223static SENSOR_DEVICE_ATTR_RO(in4_highest, powr1220_max, VMON5);
224static SENSOR_DEVICE_ATTR_RO(in5_highest, powr1220_max, VMON6);
225static SENSOR_DEVICE_ATTR_RO(in6_highest, powr1220_max, VMON7);
226static SENSOR_DEVICE_ATTR_RO(in7_highest, powr1220_max, VMON8);
227static SENSOR_DEVICE_ATTR_RO(in8_highest, powr1220_max, VMON9);
228static SENSOR_DEVICE_ATTR_RO(in9_highest, powr1220_max, VMON10);
229static SENSOR_DEVICE_ATTR_RO(in10_highest, powr1220_max, VMON11);
230static SENSOR_DEVICE_ATTR_RO(in11_highest, powr1220_max, VMON12);
231static SENSOR_DEVICE_ATTR_RO(in12_highest, powr1220_max, VCCA);
232static SENSOR_DEVICE_ATTR_RO(in13_highest, powr1220_max, VCCINP);
233
234static SENSOR_DEVICE_ATTR_RO(in0_label, powr1220_label, VMON1);
235static SENSOR_DEVICE_ATTR_RO(in1_label, powr1220_label, VMON2);
236static SENSOR_DEVICE_ATTR_RO(in2_label, powr1220_label, VMON3);
237static SENSOR_DEVICE_ATTR_RO(in3_label, powr1220_label, VMON4);
238static SENSOR_DEVICE_ATTR_RO(in4_label, powr1220_label, VMON5);
239static SENSOR_DEVICE_ATTR_RO(in5_label, powr1220_label, VMON6);
240static SENSOR_DEVICE_ATTR_RO(in6_label, powr1220_label, VMON7);
241static SENSOR_DEVICE_ATTR_RO(in7_label, powr1220_label, VMON8);
242static SENSOR_DEVICE_ATTR_RO(in8_label, powr1220_label, VMON9);
243static SENSOR_DEVICE_ATTR_RO(in9_label, powr1220_label, VMON10);
244static SENSOR_DEVICE_ATTR_RO(in10_label, powr1220_label, VMON11);
245static SENSOR_DEVICE_ATTR_RO(in11_label, powr1220_label, VMON12);
246static SENSOR_DEVICE_ATTR_RO(in12_label, powr1220_label, VCCA);
247static SENSOR_DEVICE_ATTR_RO(in13_label, powr1220_label, VCCINP);
248
249static struct attribute *powr1220_attrs[] = {
250 &sensor_dev_attr_in0_input.dev_attr.attr,
251 &sensor_dev_attr_in1_input.dev_attr.attr,
252 &sensor_dev_attr_in2_input.dev_attr.attr,
253 &sensor_dev_attr_in3_input.dev_attr.attr,
254 &sensor_dev_attr_in4_input.dev_attr.attr,
255 &sensor_dev_attr_in5_input.dev_attr.attr,
256 &sensor_dev_attr_in6_input.dev_attr.attr,
257 &sensor_dev_attr_in7_input.dev_attr.attr,
258 &sensor_dev_attr_in8_input.dev_attr.attr,
259 &sensor_dev_attr_in9_input.dev_attr.attr,
260 &sensor_dev_attr_in10_input.dev_attr.attr,
261 &sensor_dev_attr_in11_input.dev_attr.attr,
262 &sensor_dev_attr_in12_input.dev_attr.attr,
263 &sensor_dev_attr_in13_input.dev_attr.attr,
264
265 &sensor_dev_attr_in0_highest.dev_attr.attr,
266 &sensor_dev_attr_in1_highest.dev_attr.attr,
267 &sensor_dev_attr_in2_highest.dev_attr.attr,
268 &sensor_dev_attr_in3_highest.dev_attr.attr,
269 &sensor_dev_attr_in4_highest.dev_attr.attr,
270 &sensor_dev_attr_in5_highest.dev_attr.attr,
271 &sensor_dev_attr_in6_highest.dev_attr.attr,
272 &sensor_dev_attr_in7_highest.dev_attr.attr,
273 &sensor_dev_attr_in8_highest.dev_attr.attr,
274 &sensor_dev_attr_in9_highest.dev_attr.attr,
275 &sensor_dev_attr_in10_highest.dev_attr.attr,
276 &sensor_dev_attr_in11_highest.dev_attr.attr,
277 &sensor_dev_attr_in12_highest.dev_attr.attr,
278 &sensor_dev_attr_in13_highest.dev_attr.attr,
279
280 &sensor_dev_attr_in0_label.dev_attr.attr,
281 &sensor_dev_attr_in1_label.dev_attr.attr,
282 &sensor_dev_attr_in2_label.dev_attr.attr,
283 &sensor_dev_attr_in3_label.dev_attr.attr,
284 &sensor_dev_attr_in4_label.dev_attr.attr,
285 &sensor_dev_attr_in5_label.dev_attr.attr,
286 &sensor_dev_attr_in6_label.dev_attr.attr,
287 &sensor_dev_attr_in7_label.dev_attr.attr,
288 &sensor_dev_attr_in8_label.dev_attr.attr,
289 &sensor_dev_attr_in9_label.dev_attr.attr,
290 &sensor_dev_attr_in10_label.dev_attr.attr,
291 &sensor_dev_attr_in11_label.dev_attr.attr,
292 &sensor_dev_attr_in12_label.dev_attr.attr,
293 &sensor_dev_attr_in13_label.dev_attr.attr,
294
295 NULL
296};
297
298ATTRIBUTE_GROUPS(powr1220);
299
300static int powr1220_probe(struct i2c_client *client,
301 const struct i2c_device_id *id)
302{
303 struct powr1220_data *data;
304 struct device *hwmon_dev;
305
306 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
307 return -ENODEV;
308
309 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
310 if (!data)
311 return -ENOMEM;
312
313 mutex_init(&data->update_lock);
314 data->client = client;
315
316 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
317 client->name, data, powr1220_groups);
318
319 return PTR_ERR_OR_ZERO(hwmon_dev);
320}
321
322static const struct i2c_device_id powr1220_ids[] = {
323 { "powr1220", 0, },
324 { }
325};
326
327MODULE_DEVICE_TABLE(i2c, powr1220_ids);
328
329static struct i2c_driver powr1220_driver = {
330 .class = I2C_CLASS_HWMON,
331 .driver = {
332 .name = "powr1220",
333 },
334 .probe = powr1220_probe,
335 .id_table = powr1220_ids,
336};
337
338module_i2c_driver(powr1220_driver);
339
340MODULE_AUTHOR("Scott Kanowitz");
341MODULE_DESCRIPTION("POWR1220 driver");
342MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * powr1220.c - Driver for the Lattice POWR1220 programmable power supply
4 * and monitor. Users can read all ADC inputs along with their labels
5 * using the sysfs nodes.
6 *
7 * Copyright (c) 2014 Echo360 https://www.echo360.com
8 * Scott Kanowitz <skanowitz@echo360.com> <scott.kanowitz@gmail.com>
9 */
10
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/jiffies.h>
15#include <linux/i2c.h>
16#include <linux/hwmon.h>
17#include <linux/hwmon-sysfs.h>
18#include <linux/err.h>
19#include <linux/mutex.h>
20#include <linux/delay.h>
21
22#define ADC_STEP_MV 2
23#define ADC_MAX_LOW_MEASUREMENT_MV 2000
24
25enum powr1xxx_chips { powr1014, powr1220 };
26
27enum powr1220_regs {
28 VMON_STATUS0,
29 VMON_STATUS1,
30 VMON_STATUS2,
31 OUTPUT_STATUS0,
32 OUTPUT_STATUS1,
33 OUTPUT_STATUS2,
34 INPUT_STATUS,
35 ADC_VALUE_LOW,
36 ADC_VALUE_HIGH,
37 ADC_MUX,
38 UES_BYTE0,
39 UES_BYTE1,
40 UES_BYTE2,
41 UES_BYTE3,
42 GP_OUTPUT1,
43 GP_OUTPUT2,
44 GP_OUTPUT3,
45 INPUT_VALUE,
46 RESET,
47 TRIM1_TRIM,
48 TRIM2_TRIM,
49 TRIM3_TRIM,
50 TRIM4_TRIM,
51 TRIM5_TRIM,
52 TRIM6_TRIM,
53 TRIM7_TRIM,
54 TRIM8_TRIM,
55 MAX_POWR1220_REGS
56};
57
58enum powr1220_adc_values {
59 VMON1,
60 VMON2,
61 VMON3,
62 VMON4,
63 VMON5,
64 VMON6,
65 VMON7,
66 VMON8,
67 VMON9,
68 VMON10,
69 VMON11,
70 VMON12,
71 VCCA,
72 VCCINP,
73 MAX_POWR1220_ADC_VALUES
74};
75
76struct powr1220_data {
77 struct i2c_client *client;
78 struct mutex update_lock;
79 u8 max_channels;
80 bool adc_valid[MAX_POWR1220_ADC_VALUES];
81 /* the next value is in jiffies */
82 unsigned long adc_last_updated[MAX_POWR1220_ADC_VALUES];
83
84 /* values */
85 int adc_maxes[MAX_POWR1220_ADC_VALUES];
86 int adc_values[MAX_POWR1220_ADC_VALUES];
87};
88
89static const char * const input_names[] = {
90 [VMON1] = "vmon1",
91 [VMON2] = "vmon2",
92 [VMON3] = "vmon3",
93 [VMON4] = "vmon4",
94 [VMON5] = "vmon5",
95 [VMON6] = "vmon6",
96 [VMON7] = "vmon7",
97 [VMON8] = "vmon8",
98 [VMON9] = "vmon9",
99 [VMON10] = "vmon10",
100 [VMON11] = "vmon11",
101 [VMON12] = "vmon12",
102 [VCCA] = "vcca",
103 [VCCINP] = "vccinp",
104};
105
106/* Reads the specified ADC channel */
107static int powr1220_read_adc(struct device *dev, int ch_num)
108{
109 struct powr1220_data *data = dev_get_drvdata(dev);
110 int reading;
111 int result;
112 int adc_range = 0;
113
114 mutex_lock(&data->update_lock);
115
116 if (time_after(jiffies, data->adc_last_updated[ch_num] + HZ) ||
117 !data->adc_valid[ch_num]) {
118 /*
119 * figure out if we need to use the attenuator for
120 * high inputs or inputs that we don't yet have a measurement
121 * for. We dynamically set the attenuator depending on the
122 * max reading.
123 */
124 if (data->adc_maxes[ch_num] > ADC_MAX_LOW_MEASUREMENT_MV ||
125 data->adc_maxes[ch_num] == 0)
126 adc_range = 1 << 4;
127
128 /* set the attenuator and mux */
129 result = i2c_smbus_write_byte_data(data->client, ADC_MUX,
130 adc_range | ch_num);
131 if (result)
132 goto exit;
133
134 /*
135 * wait at least Tconvert time (200 us) for the
136 * conversion to complete
137 */
138 udelay(200);
139
140 /* get the ADC reading */
141 result = i2c_smbus_read_byte_data(data->client, ADC_VALUE_LOW);
142 if (result < 0)
143 goto exit;
144
145 reading = result >> 4;
146
147 /* get the upper half of the reading */
148 result = i2c_smbus_read_byte_data(data->client, ADC_VALUE_HIGH);
149 if (result < 0)
150 goto exit;
151
152 reading |= result << 4;
153
154 /* now convert the reading to a voltage */
155 reading *= ADC_STEP_MV;
156 data->adc_values[ch_num] = reading;
157 data->adc_valid[ch_num] = true;
158 data->adc_last_updated[ch_num] = jiffies;
159 result = reading;
160
161 if (reading > data->adc_maxes[ch_num])
162 data->adc_maxes[ch_num] = reading;
163 } else {
164 result = data->adc_values[ch_num];
165 }
166
167exit:
168 mutex_unlock(&data->update_lock);
169
170 return result;
171}
172
173static umode_t
174powr1220_is_visible(const void *data, enum hwmon_sensor_types type, u32
175 attr, int channel)
176{
177 struct powr1220_data *chip_data = (struct powr1220_data *)data;
178
179 if (channel >= chip_data->max_channels)
180 return 0;
181
182 switch (type) {
183 case hwmon_in:
184 switch (attr) {
185 case hwmon_in_input:
186 case hwmon_in_highest:
187 case hwmon_in_label:
188 return 0444;
189 default:
190 break;
191 }
192 break;
193 default:
194 break;
195 }
196
197 return 0;
198}
199
200static int
201powr1220_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
202 int channel, const char **str)
203{
204 switch (type) {
205 case hwmon_in:
206 switch (attr) {
207 case hwmon_in_label:
208 *str = input_names[channel];
209 return 0;
210 default:
211 return -EOPNOTSUPP;
212 }
213 break;
214 default:
215 return -EOPNOTSUPP;
216 }
217
218 return -EOPNOTSUPP;
219}
220
221static int
222powr1220_read(struct device *dev, enum hwmon_sensor_types type, u32
223 attr, int channel, long *val)
224{
225 struct powr1220_data *data = dev_get_drvdata(dev);
226 int ret;
227
228 switch (type) {
229 case hwmon_in:
230 switch (attr) {
231 case hwmon_in_input:
232 ret = powr1220_read_adc(dev, channel);
233 if (ret < 0)
234 return ret;
235 *val = ret;
236 break;
237 case hwmon_in_highest:
238 *val = data->adc_maxes[channel];
239 break;
240 default:
241 return -EOPNOTSUPP;
242 }
243 break;
244 default:
245 return -EOPNOTSUPP;
246}
247
248 return 0;
249}
250
251static const struct hwmon_channel_info * const powr1220_info[] = {
252 HWMON_CHANNEL_INFO(in,
253 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
254 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
255 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
256 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
257 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
258 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
259 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
260 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
261 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
262 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
263 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
264 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
265 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL,
266 HWMON_I_INPUT | HWMON_I_HIGHEST | HWMON_I_LABEL),
267
268 NULL
269};
270
271static const struct hwmon_ops powr1220_hwmon_ops = {
272 .read = powr1220_read,
273 .read_string = powr1220_read_string,
274 .is_visible = powr1220_is_visible,
275};
276
277static const struct hwmon_chip_info powr1220_chip_info = {
278 .ops = &powr1220_hwmon_ops,
279 .info = powr1220_info,
280};
281
282static const struct i2c_device_id powr1220_ids[];
283
284static int powr1220_probe(struct i2c_client *client)
285{
286 struct powr1220_data *data;
287 struct device *hwmon_dev;
288
289 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
290 return -ENODEV;
291
292 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
293 if (!data)
294 return -ENOMEM;
295
296 switch (i2c_match_id(powr1220_ids, client)->driver_data) {
297 case powr1014:
298 data->max_channels = 10;
299 break;
300 default:
301 data->max_channels = 12;
302 break;
303 }
304
305 mutex_init(&data->update_lock);
306 data->client = client;
307
308 hwmon_dev = devm_hwmon_device_register_with_info(&client->dev,
309 client->name,
310 data,
311 &powr1220_chip_info,
312 NULL);
313
314 return PTR_ERR_OR_ZERO(hwmon_dev);
315}
316
317static const struct i2c_device_id powr1220_ids[] = {
318 { "powr1014", powr1014, },
319 { "powr1220", powr1220, },
320 { }
321};
322
323MODULE_DEVICE_TABLE(i2c, powr1220_ids);
324
325static struct i2c_driver powr1220_driver = {
326 .class = I2C_CLASS_HWMON,
327 .driver = {
328 .name = "powr1220",
329 },
330 .probe = powr1220_probe,
331 .id_table = powr1220_ids,
332};
333
334module_i2c_driver(powr1220_driver);
335
336MODULE_AUTHOR("Scott Kanowitz");
337MODULE_DESCRIPTION("POWR1220 driver");
338MODULE_LICENSE("GPL");