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f5bae264 GR |
1 | /* |
2 | * Driver for | |
3 | * Maxim MAX16065/MAX16066 12-Channel/8-Channel, Flash-Configurable | |
4 | * System Managers with Nonvolatile Fault Registers | |
5 | * Maxim MAX16067/MAX16068 6-Channel, Flash-Configurable System Managers | |
6 | * with Nonvolatile Fault Registers | |
7 | * Maxim MAX16070/MAX16071 12-Channel/8-Channel, Flash-Configurable System | |
8 | * Monitors with Nonvolatile Fault Registers | |
9 | * | |
10 | * Copyright (C) 2011 Ericsson AB. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; version 2 of the License. | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/i2c.h> | |
23 | #include <linux/hwmon.h> | |
24 | #include <linux/hwmon-sysfs.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/jiffies.h> | |
27 | ||
28 | enum chips { max16065, max16066, max16067, max16068, max16070, max16071 }; | |
29 | ||
30 | /* | |
31 | * Registers | |
32 | */ | |
33 | #define MAX16065_ADC(x) ((x) * 2) | |
34 | ||
35 | #define MAX16065_CURR_SENSE 0x18 | |
36 | #define MAX16065_CSP_ADC 0x19 | |
37 | #define MAX16065_FAULT(x) (0x1b + (x)) | |
38 | #define MAX16065_SCALE(x) (0x43 + (x)) | |
39 | #define MAX16065_CURR_CONTROL 0x47 | |
40 | #define MAX16065_LIMIT(l, x) (0x48 + (l) + (x) * 3) /* | |
41 | * l: limit | |
42 | * 0: min/max | |
43 | * 1: crit | |
44 | * 2: lcrit | |
45 | * x: ADC index | |
46 | */ | |
47 | ||
48 | #define MAX16065_SW_ENABLE 0x73 | |
49 | ||
50 | #define MAX16065_WARNING_OV (1 << 3) /* Set if secondary threshold is OV | |
51 | warning */ | |
52 | ||
53 | #define MAX16065_CURR_ENABLE (1 << 0) | |
54 | ||
55 | #define MAX16065_NUM_LIMIT 3 | |
56 | #define MAX16065_NUM_ADC 12 /* maximum number of ADC channels */ | |
57 | ||
58 | static const int max16065_num_adc[] = { | |
59 | [max16065] = 12, | |
60 | [max16066] = 8, | |
61 | [max16067] = 6, | |
62 | [max16068] = 6, | |
63 | [max16070] = 12, | |
64 | [max16071] = 8, | |
65 | }; | |
66 | ||
67 | static const bool max16065_have_secondary[] = { | |
68 | [max16065] = true, | |
69 | [max16066] = true, | |
70 | [max16067] = false, | |
71 | [max16068] = false, | |
72 | [max16070] = true, | |
73 | [max16071] = true, | |
74 | }; | |
75 | ||
76 | static const bool max16065_have_current[] = { | |
77 | [max16065] = true, | |
78 | [max16066] = true, | |
79 | [max16067] = false, | |
80 | [max16068] = false, | |
81 | [max16070] = true, | |
82 | [max16071] = true, | |
83 | }; | |
84 | ||
85 | struct max16065_data { | |
86 | enum chips type; | |
87 | struct device *hwmon_dev; | |
88 | struct mutex update_lock; | |
89 | bool valid; | |
90 | unsigned long last_updated; /* in jiffies */ | |
91 | int num_adc; | |
92 | bool have_current; | |
93 | int curr_gain; | |
94 | /* limits are in mV */ | |
95 | int limit[MAX16065_NUM_LIMIT][MAX16065_NUM_ADC]; | |
96 | int range[MAX16065_NUM_ADC + 1];/* voltage range */ | |
97 | int adc[MAX16065_NUM_ADC + 1]; /* adc values (raw) including csp_adc */ | |
98 | int curr_sense; | |
99 | int fault[2]; | |
100 | }; | |
101 | ||
102 | static const int max16065_adc_range[] = { 5560, 2780, 1390, 0 }; | |
103 | static const int max16065_csp_adc_range[] = { 7000, 14000 }; | |
104 | ||
105 | /* ADC registers have 10 bit resolution. */ | |
106 | static inline int ADC_TO_MV(int adc, int range) | |
107 | { | |
108 | return (adc * range) / 1024; | |
109 | } | |
110 | ||
111 | /* | |
112 | * Limit registers have 8 bit resolution and match upper 8 bits of ADC | |
113 | * registers. | |
114 | */ | |
115 | static inline int LIMIT_TO_MV(int limit, int range) | |
116 | { | |
117 | return limit * range / 256; | |
118 | } | |
119 | ||
120 | static inline int MV_TO_LIMIT(int mv, int range) | |
121 | { | |
122 | return SENSORS_LIMIT(DIV_ROUND_CLOSEST(mv * 256, range), 0, 255); | |
123 | } | |
124 | ||
125 | static inline int ADC_TO_CURR(int adc, int gain) | |
126 | { | |
ff71c182 | 127 | return adc * 1400000 / (gain * 255); |
f5bae264 GR |
128 | } |
129 | ||
130 | /* | |
131 | * max16065_read_adc() | |
132 | * | |
133 | * Read 16 bit value from <reg>, <reg+1>. | |
134 | * Upper 8 bits are in <reg>, lower 2 bits are in bits 7:6 of <reg+1>. | |
135 | */ | |
136 | static int max16065_read_adc(struct i2c_client *client, int reg) | |
137 | { | |
138 | int rv; | |
139 | ||
140 | rv = i2c_smbus_read_word_data(client, reg); | |
141 | if (unlikely(rv < 0)) | |
142 | return rv; | |
143 | return ((rv & 0xff) << 2) | ((rv >> 14) & 0x03); | |
144 | } | |
145 | ||
146 | static struct max16065_data *max16065_update_device(struct device *dev) | |
147 | { | |
148 | struct i2c_client *client = to_i2c_client(dev); | |
149 | struct max16065_data *data = i2c_get_clientdata(client); | |
150 | ||
151 | mutex_lock(&data->update_lock); | |
152 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
153 | int i; | |
154 | ||
155 | for (i = 0; i < data->num_adc; i++) | |
156 | data->adc[i] | |
157 | = max16065_read_adc(client, MAX16065_ADC(i)); | |
158 | ||
159 | if (data->have_current) { | |
160 | data->adc[MAX16065_NUM_ADC] | |
161 | = max16065_read_adc(client, MAX16065_CSP_ADC); | |
162 | data->curr_sense | |
163 | = i2c_smbus_read_byte_data(client, | |
164 | MAX16065_CURR_SENSE); | |
165 | } | |
166 | ||
167 | for (i = 0; i < DIV_ROUND_UP(data->num_adc, 8); i++) | |
168 | data->fault[i] | |
169 | = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i)); | |
170 | ||
171 | data->last_updated = jiffies; | |
172 | data->valid = 1; | |
173 | } | |
174 | mutex_unlock(&data->update_lock); | |
175 | return data; | |
176 | } | |
177 | ||
178 | static ssize_t max16065_show_alarm(struct device *dev, | |
179 | struct device_attribute *da, char *buf) | |
180 | { | |
181 | struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); | |
182 | struct max16065_data *data = max16065_update_device(dev); | |
183 | int val = data->fault[attr2->nr]; | |
184 | ||
185 | if (val < 0) | |
186 | return val; | |
187 | ||
188 | val &= (1 << attr2->index); | |
189 | if (val) | |
190 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
191 | MAX16065_FAULT(attr2->nr), val); | |
192 | ||
193 | return snprintf(buf, PAGE_SIZE, "%d\n", !!val); | |
194 | } | |
195 | ||
196 | static ssize_t max16065_show_input(struct device *dev, | |
197 | struct device_attribute *da, char *buf) | |
198 | { | |
199 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
200 | struct max16065_data *data = max16065_update_device(dev); | |
201 | int adc = data->adc[attr->index]; | |
202 | ||
203 | if (unlikely(adc < 0)) | |
204 | return adc; | |
205 | ||
206 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
207 | ADC_TO_MV(adc, data->range[attr->index])); | |
208 | } | |
209 | ||
210 | static ssize_t max16065_show_current(struct device *dev, | |
211 | struct device_attribute *da, char *buf) | |
212 | { | |
213 | struct max16065_data *data = max16065_update_device(dev); | |
214 | ||
215 | if (unlikely(data->curr_sense < 0)) | |
216 | return data->curr_sense; | |
217 | ||
218 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
219 | ADC_TO_CURR(data->curr_sense, data->curr_gain)); | |
220 | } | |
221 | ||
222 | static ssize_t max16065_set_limit(struct device *dev, | |
223 | struct device_attribute *da, | |
224 | const char *buf, size_t count) | |
225 | { | |
226 | struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); | |
227 | struct i2c_client *client = to_i2c_client(dev); | |
228 | struct max16065_data *data = i2c_get_clientdata(client); | |
229 | unsigned long val; | |
230 | int err; | |
231 | int limit; | |
232 | ||
233 | err = strict_strtoul(buf, 10, &val); | |
234 | if (unlikely(err < 0)) | |
235 | return err; | |
236 | ||
237 | limit = MV_TO_LIMIT(val, data->range[attr2->index]); | |
238 | ||
239 | mutex_lock(&data->update_lock); | |
240 | data->limit[attr2->nr][attr2->index] | |
241 | = LIMIT_TO_MV(limit, data->range[attr2->index]); | |
242 | i2c_smbus_write_byte_data(client, | |
243 | MAX16065_LIMIT(attr2->nr, attr2->index), | |
244 | limit); | |
245 | mutex_unlock(&data->update_lock); | |
246 | ||
247 | return count; | |
248 | } | |
249 | ||
250 | static ssize_t max16065_show_limit(struct device *dev, | |
251 | struct device_attribute *da, char *buf) | |
252 | { | |
253 | struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); | |
254 | struct i2c_client *client = to_i2c_client(dev); | |
255 | struct max16065_data *data = i2c_get_clientdata(client); | |
256 | ||
257 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
258 | data->limit[attr2->nr][attr2->index]); | |
259 | } | |
260 | ||
261 | /* Construct a sensor_device_attribute structure for each register */ | |
262 | ||
263 | /* Input voltages */ | |
264 | static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, max16065_show_input, NULL, 0); | |
265 | static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, max16065_show_input, NULL, 1); | |
266 | static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, max16065_show_input, NULL, 2); | |
267 | static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, max16065_show_input, NULL, 3); | |
268 | static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, max16065_show_input, NULL, 4); | |
269 | static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, max16065_show_input, NULL, 5); | |
270 | static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, max16065_show_input, NULL, 6); | |
271 | static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, max16065_show_input, NULL, 7); | |
272 | static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, max16065_show_input, NULL, 8); | |
273 | static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, max16065_show_input, NULL, 9); | |
274 | static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, max16065_show_input, NULL, 10); | |
275 | static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, max16065_show_input, NULL, 11); | |
276 | static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, max16065_show_input, NULL, 12); | |
277 | ||
278 | /* Input voltages lcrit */ | |
279 | static SENSOR_DEVICE_ATTR_2(in0_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
280 | max16065_set_limit, 2, 0); | |
281 | static SENSOR_DEVICE_ATTR_2(in1_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
282 | max16065_set_limit, 2, 1); | |
283 | static SENSOR_DEVICE_ATTR_2(in2_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
284 | max16065_set_limit, 2, 2); | |
285 | static SENSOR_DEVICE_ATTR_2(in3_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
286 | max16065_set_limit, 2, 3); | |
287 | static SENSOR_DEVICE_ATTR_2(in4_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
288 | max16065_set_limit, 2, 4); | |
289 | static SENSOR_DEVICE_ATTR_2(in5_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
290 | max16065_set_limit, 2, 5); | |
291 | static SENSOR_DEVICE_ATTR_2(in6_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
292 | max16065_set_limit, 2, 6); | |
293 | static SENSOR_DEVICE_ATTR_2(in7_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
294 | max16065_set_limit, 2, 7); | |
295 | static SENSOR_DEVICE_ATTR_2(in8_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
296 | max16065_set_limit, 2, 8); | |
297 | static SENSOR_DEVICE_ATTR_2(in9_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
298 | max16065_set_limit, 2, 9); | |
299 | static SENSOR_DEVICE_ATTR_2(in10_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
300 | max16065_set_limit, 2, 10); | |
301 | static SENSOR_DEVICE_ATTR_2(in11_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
302 | max16065_set_limit, 2, 11); | |
303 | ||
304 | /* Input voltages crit */ | |
305 | static SENSOR_DEVICE_ATTR_2(in0_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
306 | max16065_set_limit, 1, 0); | |
307 | static SENSOR_DEVICE_ATTR_2(in1_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
308 | max16065_set_limit, 1, 1); | |
309 | static SENSOR_DEVICE_ATTR_2(in2_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
310 | max16065_set_limit, 1, 2); | |
311 | static SENSOR_DEVICE_ATTR_2(in3_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
312 | max16065_set_limit, 1, 3); | |
313 | static SENSOR_DEVICE_ATTR_2(in4_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
314 | max16065_set_limit, 1, 4); | |
315 | static SENSOR_DEVICE_ATTR_2(in5_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
316 | max16065_set_limit, 1, 5); | |
317 | static SENSOR_DEVICE_ATTR_2(in6_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
318 | max16065_set_limit, 1, 6); | |
319 | static SENSOR_DEVICE_ATTR_2(in7_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
320 | max16065_set_limit, 1, 7); | |
321 | static SENSOR_DEVICE_ATTR_2(in8_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
322 | max16065_set_limit, 1, 8); | |
323 | static SENSOR_DEVICE_ATTR_2(in9_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
324 | max16065_set_limit, 1, 9); | |
325 | static SENSOR_DEVICE_ATTR_2(in10_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
326 | max16065_set_limit, 1, 10); | |
327 | static SENSOR_DEVICE_ATTR_2(in11_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
328 | max16065_set_limit, 1, 11); | |
329 | ||
330 | /* Input voltages min */ | |
331 | static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
332 | max16065_set_limit, 0, 0); | |
333 | static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
334 | max16065_set_limit, 0, 1); | |
335 | static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
336 | max16065_set_limit, 0, 2); | |
337 | static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
338 | max16065_set_limit, 0, 3); | |
339 | static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
340 | max16065_set_limit, 0, 4); | |
341 | static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
342 | max16065_set_limit, 0, 5); | |
343 | static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
344 | max16065_set_limit, 0, 6); | |
345 | static SENSOR_DEVICE_ATTR_2(in7_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
346 | max16065_set_limit, 0, 7); | |
347 | static SENSOR_DEVICE_ATTR_2(in8_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
348 | max16065_set_limit, 0, 8); | |
349 | static SENSOR_DEVICE_ATTR_2(in9_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
350 | max16065_set_limit, 0, 9); | |
351 | static SENSOR_DEVICE_ATTR_2(in10_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
352 | max16065_set_limit, 0, 10); | |
353 | static SENSOR_DEVICE_ATTR_2(in11_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
354 | max16065_set_limit, 0, 11); | |
355 | ||
356 | /* Input voltages max */ | |
357 | static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
358 | max16065_set_limit, 0, 0); | |
359 | static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
360 | max16065_set_limit, 0, 1); | |
361 | static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
362 | max16065_set_limit, 0, 2); | |
363 | static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
364 | max16065_set_limit, 0, 3); | |
365 | static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
366 | max16065_set_limit, 0, 4); | |
367 | static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
368 | max16065_set_limit, 0, 5); | |
369 | static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
370 | max16065_set_limit, 0, 6); | |
371 | static SENSOR_DEVICE_ATTR_2(in7_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
372 | max16065_set_limit, 0, 7); | |
373 | static SENSOR_DEVICE_ATTR_2(in8_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
374 | max16065_set_limit, 0, 8); | |
375 | static SENSOR_DEVICE_ATTR_2(in9_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
376 | max16065_set_limit, 0, 9); | |
377 | static SENSOR_DEVICE_ATTR_2(in10_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
378 | max16065_set_limit, 0, 10); | |
379 | static SENSOR_DEVICE_ATTR_2(in11_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
380 | max16065_set_limit, 0, 11); | |
381 | ||
382 | /* alarms */ | |
383 | static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
384 | 0, 0); | |
385 | static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
386 | 0, 1); | |
387 | static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
388 | 0, 2); | |
389 | static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
390 | 0, 3); | |
391 | static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
392 | 0, 4); | |
393 | static SENSOR_DEVICE_ATTR_2(in5_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
394 | 0, 5); | |
395 | static SENSOR_DEVICE_ATTR_2(in6_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
396 | 0, 6); | |
397 | static SENSOR_DEVICE_ATTR_2(in7_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
398 | 0, 7); | |
399 | static SENSOR_DEVICE_ATTR_2(in8_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
400 | 1, 0); | |
401 | static SENSOR_DEVICE_ATTR_2(in9_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
402 | 1, 1); | |
403 | static SENSOR_DEVICE_ATTR_2(in10_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
404 | 1, 2); | |
405 | static SENSOR_DEVICE_ATTR_2(in11_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
406 | 1, 3); | |
407 | ||
408 | /* Current and alarm */ | |
409 | static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, max16065_show_current, NULL, 0); | |
410 | static SENSOR_DEVICE_ATTR_2(curr1_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
411 | 1, 4); | |
412 | ||
413 | /* | |
414 | * Finally, construct an array of pointers to members of the above objects, | |
415 | * as required for sysfs_create_group() | |
416 | */ | |
417 | static struct attribute *max16065_basic_attributes[] = { | |
418 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
419 | &sensor_dev_attr_in0_lcrit.dev_attr.attr, | |
420 | &sensor_dev_attr_in0_crit.dev_attr.attr, | |
421 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
422 | ||
423 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
424 | &sensor_dev_attr_in1_lcrit.dev_attr.attr, | |
425 | &sensor_dev_attr_in1_crit.dev_attr.attr, | |
426 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
427 | ||
428 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
429 | &sensor_dev_attr_in2_lcrit.dev_attr.attr, | |
430 | &sensor_dev_attr_in2_crit.dev_attr.attr, | |
431 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
432 | ||
433 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
434 | &sensor_dev_attr_in3_lcrit.dev_attr.attr, | |
435 | &sensor_dev_attr_in3_crit.dev_attr.attr, | |
436 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
437 | ||
438 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
439 | &sensor_dev_attr_in4_lcrit.dev_attr.attr, | |
440 | &sensor_dev_attr_in4_crit.dev_attr.attr, | |
441 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
442 | ||
443 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
444 | &sensor_dev_attr_in5_lcrit.dev_attr.attr, | |
445 | &sensor_dev_attr_in5_crit.dev_attr.attr, | |
446 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
447 | ||
448 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
449 | &sensor_dev_attr_in6_lcrit.dev_attr.attr, | |
450 | &sensor_dev_attr_in6_crit.dev_attr.attr, | |
451 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
452 | ||
453 | &sensor_dev_attr_in7_input.dev_attr.attr, | |
454 | &sensor_dev_attr_in7_lcrit.dev_attr.attr, | |
455 | &sensor_dev_attr_in7_crit.dev_attr.attr, | |
456 | &sensor_dev_attr_in7_alarm.dev_attr.attr, | |
457 | ||
458 | &sensor_dev_attr_in8_input.dev_attr.attr, | |
459 | &sensor_dev_attr_in8_lcrit.dev_attr.attr, | |
460 | &sensor_dev_attr_in8_crit.dev_attr.attr, | |
461 | &sensor_dev_attr_in8_alarm.dev_attr.attr, | |
462 | ||
463 | &sensor_dev_attr_in9_input.dev_attr.attr, | |
464 | &sensor_dev_attr_in9_lcrit.dev_attr.attr, | |
465 | &sensor_dev_attr_in9_crit.dev_attr.attr, | |
466 | &sensor_dev_attr_in9_alarm.dev_attr.attr, | |
467 | ||
468 | &sensor_dev_attr_in10_input.dev_attr.attr, | |
469 | &sensor_dev_attr_in10_lcrit.dev_attr.attr, | |
470 | &sensor_dev_attr_in10_crit.dev_attr.attr, | |
471 | &sensor_dev_attr_in10_alarm.dev_attr.attr, | |
472 | ||
473 | &sensor_dev_attr_in11_input.dev_attr.attr, | |
474 | &sensor_dev_attr_in11_lcrit.dev_attr.attr, | |
475 | &sensor_dev_attr_in11_crit.dev_attr.attr, | |
476 | &sensor_dev_attr_in11_alarm.dev_attr.attr, | |
477 | ||
478 | NULL | |
479 | }; | |
480 | ||
481 | static struct attribute *max16065_current_attributes[] = { | |
482 | &sensor_dev_attr_in12_input.dev_attr.attr, | |
483 | &sensor_dev_attr_curr1_input.dev_attr.attr, | |
484 | &sensor_dev_attr_curr1_alarm.dev_attr.attr, | |
485 | NULL | |
486 | }; | |
487 | ||
488 | static struct attribute *max16065_min_attributes[] = { | |
489 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
490 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
491 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
492 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
493 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
494 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
495 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
496 | &sensor_dev_attr_in7_min.dev_attr.attr, | |
497 | &sensor_dev_attr_in8_min.dev_attr.attr, | |
498 | &sensor_dev_attr_in9_min.dev_attr.attr, | |
499 | &sensor_dev_attr_in10_min.dev_attr.attr, | |
500 | &sensor_dev_attr_in11_min.dev_attr.attr, | |
501 | NULL | |
502 | }; | |
503 | ||
504 | static struct attribute *max16065_max_attributes[] = { | |
505 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
506 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
507 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
508 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
509 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
510 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
511 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
512 | &sensor_dev_attr_in7_max.dev_attr.attr, | |
513 | &sensor_dev_attr_in8_max.dev_attr.attr, | |
514 | &sensor_dev_attr_in9_max.dev_attr.attr, | |
515 | &sensor_dev_attr_in10_max.dev_attr.attr, | |
516 | &sensor_dev_attr_in11_max.dev_attr.attr, | |
517 | NULL | |
518 | }; | |
519 | ||
520 | static const struct attribute_group max16065_basic_group = { | |
521 | .attrs = max16065_basic_attributes, | |
522 | }; | |
523 | ||
524 | static const struct attribute_group max16065_current_group = { | |
525 | .attrs = max16065_current_attributes, | |
526 | }; | |
527 | ||
528 | static const struct attribute_group max16065_min_group = { | |
529 | .attrs = max16065_min_attributes, | |
530 | }; | |
531 | ||
532 | static const struct attribute_group max16065_max_group = { | |
533 | .attrs = max16065_max_attributes, | |
534 | }; | |
535 | ||
536 | static void max16065_cleanup(struct i2c_client *client) | |
537 | { | |
538 | sysfs_remove_group(&client->dev.kobj, &max16065_max_group); | |
539 | sysfs_remove_group(&client->dev.kobj, &max16065_min_group); | |
540 | sysfs_remove_group(&client->dev.kobj, &max16065_current_group); | |
541 | sysfs_remove_group(&client->dev.kobj, &max16065_basic_group); | |
542 | } | |
543 | ||
544 | static int max16065_probe(struct i2c_client *client, | |
545 | const struct i2c_device_id *id) | |
546 | { | |
547 | struct i2c_adapter *adapter = client->adapter; | |
548 | struct max16065_data *data; | |
549 | int i, j, val, ret; | |
550 | bool have_secondary; /* true if chip has secondary limits */ | |
551 | bool secondary_is_max = false; /* secondary limits reflect max */ | |
552 | ||
553 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | |
554 | | I2C_FUNC_SMBUS_READ_WORD_DATA)) | |
555 | return -ENODEV; | |
556 | ||
557 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
558 | if (unlikely(!data)) | |
559 | return -ENOMEM; | |
560 | ||
561 | i2c_set_clientdata(client, data); | |
562 | mutex_init(&data->update_lock); | |
563 | ||
564 | data->num_adc = max16065_num_adc[id->driver_data]; | |
565 | data->have_current = max16065_have_current[id->driver_data]; | |
566 | have_secondary = max16065_have_secondary[id->driver_data]; | |
567 | ||
568 | if (have_secondary) { | |
569 | val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE); | |
570 | if (unlikely(val < 0)) { | |
571 | ret = val; | |
572 | goto out_free; | |
573 | } | |
574 | secondary_is_max = val & MAX16065_WARNING_OV; | |
575 | } | |
576 | ||
577 | /* Read scale registers, convert to range */ | |
578 | for (i = 0; i < DIV_ROUND_UP(data->num_adc, 4); i++) { | |
579 | val = i2c_smbus_read_byte_data(client, MAX16065_SCALE(i)); | |
580 | if (unlikely(val < 0)) { | |
581 | ret = val; | |
582 | goto out_free; | |
583 | } | |
584 | for (j = 0; j < 4 && i * 4 + j < data->num_adc; j++) { | |
585 | data->range[i * 4 + j] = | |
586 | max16065_adc_range[(val >> (j * 2)) & 0x3]; | |
587 | } | |
588 | } | |
589 | ||
590 | /* Read limits */ | |
591 | for (i = 0; i < MAX16065_NUM_LIMIT; i++) { | |
592 | if (i == 0 && !have_secondary) | |
593 | continue; | |
594 | ||
595 | for (j = 0; j < data->num_adc; j++) { | |
596 | val = i2c_smbus_read_byte_data(client, | |
597 | MAX16065_LIMIT(i, j)); | |
598 | if (unlikely(val < 0)) { | |
599 | ret = val; | |
600 | goto out_free; | |
601 | } | |
602 | data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]); | |
603 | } | |
604 | } | |
605 | ||
606 | /* Register sysfs hooks */ | |
607 | for (i = 0; i < data->num_adc * 4; i++) { | |
608 | /* Do not create sysfs entry if channel is disabled */ | |
609 | if (!data->range[i / 4]) | |
610 | continue; | |
611 | ||
612 | ret = sysfs_create_file(&client->dev.kobj, | |
613 | max16065_basic_attributes[i]); | |
614 | if (unlikely(ret)) | |
615 | goto out; | |
616 | } | |
617 | ||
618 | if (have_secondary) { | |
619 | struct attribute **attr = secondary_is_max ? | |
620 | max16065_max_attributes : max16065_min_attributes; | |
621 | ||
622 | for (i = 0; i < data->num_adc; i++) { | |
623 | if (!data->range[i]) | |
624 | continue; | |
625 | ||
626 | ret = sysfs_create_file(&client->dev.kobj, attr[i]); | |
627 | if (unlikely(ret)) | |
628 | goto out; | |
629 | } | |
630 | } | |
631 | ||
632 | if (data->have_current) { | |
633 | val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL); | |
634 | if (unlikely(val < 0)) { | |
635 | ret = val; | |
636 | goto out; | |
637 | } | |
638 | if (val & MAX16065_CURR_ENABLE) { | |
639 | /* | |
640 | * Current gain is 6, 12, 24, 48 based on values in | |
641 | * bit 2,3. | |
642 | */ | |
643 | data->curr_gain = 6 << ((val >> 2) & 0x03); | |
644 | data->range[MAX16065_NUM_ADC] | |
645 | = max16065_csp_adc_range[(val >> 1) & 0x01]; | |
646 | ret = sysfs_create_group(&client->dev.kobj, | |
647 | &max16065_current_group); | |
648 | if (unlikely(ret)) | |
649 | goto out; | |
650 | } else { | |
651 | data->have_current = false; | |
652 | } | |
653 | } | |
654 | ||
655 | data->hwmon_dev = hwmon_device_register(&client->dev); | |
656 | if (unlikely(IS_ERR(data->hwmon_dev))) { | |
657 | ret = PTR_ERR(data->hwmon_dev); | |
658 | goto out; | |
659 | } | |
660 | return 0; | |
661 | ||
662 | out: | |
663 | max16065_cleanup(client); | |
664 | out_free: | |
665 | kfree(data); | |
666 | return ret; | |
667 | } | |
668 | ||
669 | static int max16065_remove(struct i2c_client *client) | |
670 | { | |
671 | struct max16065_data *data = i2c_get_clientdata(client); | |
672 | ||
673 | hwmon_device_unregister(data->hwmon_dev); | |
674 | max16065_cleanup(client); | |
675 | kfree(data); | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | static const struct i2c_device_id max16065_id[] = { | |
681 | { "max16065", max16065 }, | |
682 | { "max16066", max16066 }, | |
683 | { "max16067", max16067 }, | |
684 | { "max16068", max16068 }, | |
685 | { "max16070", max16070 }, | |
686 | { "max16071", max16071 }, | |
687 | { } | |
688 | }; | |
689 | ||
690 | MODULE_DEVICE_TABLE(i2c, max16065_id); | |
691 | ||
692 | /* This is the driver that will be inserted */ | |
693 | static struct i2c_driver max16065_driver = { | |
694 | .driver = { | |
695 | .name = "max16065", | |
696 | }, | |
697 | .probe = max16065_probe, | |
698 | .remove = max16065_remove, | |
699 | .id_table = max16065_id, | |
700 | }; | |
701 | ||
702 | static int __init max16065_init(void) | |
703 | { | |
704 | return i2c_add_driver(&max16065_driver); | |
705 | } | |
706 | ||
707 | static void __exit max16065_exit(void) | |
708 | { | |
709 | i2c_del_driver(&max16065_driver); | |
710 | } | |
711 | ||
712 | MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>"); | |
713 | MODULE_DESCRIPTION("MAX16065 driver"); | |
714 | MODULE_LICENSE("GPL"); | |
715 | ||
716 | module_init(max16065_init); | |
717 | module_exit(max16065_exit); |