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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> | |
f5bae264 GR |
25 | #include <linux/jiffies.h> |
26 | ||
27 | enum chips { max16065, max16066, max16067, max16068, max16070, max16071 }; | |
28 | ||
29 | /* | |
30 | * Registers | |
31 | */ | |
32 | #define MAX16065_ADC(x) ((x) * 2) | |
33 | ||
34 | #define MAX16065_CURR_SENSE 0x18 | |
35 | #define MAX16065_CSP_ADC 0x19 | |
36 | #define MAX16065_FAULT(x) (0x1b + (x)) | |
37 | #define MAX16065_SCALE(x) (0x43 + (x)) | |
38 | #define MAX16065_CURR_CONTROL 0x47 | |
39 | #define MAX16065_LIMIT(l, x) (0x48 + (l) + (x) * 3) /* | |
40 | * l: limit | |
41 | * 0: min/max | |
42 | * 1: crit | |
43 | * 2: lcrit | |
44 | * x: ADC index | |
45 | */ | |
46 | ||
47 | #define MAX16065_SW_ENABLE 0x73 | |
48 | ||
49 | #define MAX16065_WARNING_OV (1 << 3) /* Set if secondary threshold is OV | |
50 | warning */ | |
51 | ||
52 | #define MAX16065_CURR_ENABLE (1 << 0) | |
53 | ||
54 | #define MAX16065_NUM_LIMIT 3 | |
55 | #define MAX16065_NUM_ADC 12 /* maximum number of ADC channels */ | |
56 | ||
57 | static const int max16065_num_adc[] = { | |
58 | [max16065] = 12, | |
59 | [max16066] = 8, | |
60 | [max16067] = 6, | |
61 | [max16068] = 6, | |
62 | [max16070] = 12, | |
63 | [max16071] = 8, | |
64 | }; | |
65 | ||
66 | static const bool max16065_have_secondary[] = { | |
67 | [max16065] = true, | |
68 | [max16066] = true, | |
69 | [max16067] = false, | |
70 | [max16068] = false, | |
71 | [max16070] = true, | |
72 | [max16071] = true, | |
73 | }; | |
74 | ||
75 | static const bool max16065_have_current[] = { | |
76 | [max16065] = true, | |
77 | [max16066] = true, | |
78 | [max16067] = false, | |
79 | [max16068] = false, | |
80 | [max16070] = true, | |
81 | [max16071] = true, | |
82 | }; | |
83 | ||
84 | struct max16065_data { | |
85 | enum chips type; | |
38c75dc3 GR |
86 | struct i2c_client *client; |
87 | const struct attribute_group *groups[4]; | |
f5bae264 GR |
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 | { | |
2a844c14 | 122 | return clamp_val(DIV_ROUND_CLOSEST(mv * 256, range), 0, 255); |
f5bae264 GR |
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 | ||
90f4102c | 140 | rv = i2c_smbus_read_word_swapped(client, reg); |
f5bae264 GR |
141 | if (unlikely(rv < 0)) |
142 | return rv; | |
90f4102c | 143 | return rv >> 6; |
f5bae264 GR |
144 | } |
145 | ||
146 | static struct max16065_data *max16065_update_device(struct device *dev) | |
147 | { | |
38c75dc3 GR |
148 | struct max16065_data *data = dev_get_drvdata(dev); |
149 | struct i2c_client *client = data->client; | |
f5bae264 GR |
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) | |
38c75dc3 | 190 | i2c_smbus_write_byte_data(data->client, |
f5bae264 GR |
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); | |
38c75dc3 | 227 | struct max16065_data *data = dev_get_drvdata(dev); |
f5bae264 GR |
228 | unsigned long val; |
229 | int err; | |
230 | int limit; | |
231 | ||
179c4fdb | 232 | err = kstrtoul(buf, 10, &val); |
f5bae264 GR |
233 | if (unlikely(err < 0)) |
234 | return err; | |
235 | ||
236 | limit = MV_TO_LIMIT(val, data->range[attr2->index]); | |
237 | ||
238 | mutex_lock(&data->update_lock); | |
239 | data->limit[attr2->nr][attr2->index] | |
240 | = LIMIT_TO_MV(limit, data->range[attr2->index]); | |
38c75dc3 | 241 | i2c_smbus_write_byte_data(data->client, |
f5bae264 GR |
242 | MAX16065_LIMIT(attr2->nr, attr2->index), |
243 | limit); | |
244 | mutex_unlock(&data->update_lock); | |
245 | ||
246 | return count; | |
247 | } | |
248 | ||
249 | static ssize_t max16065_show_limit(struct device *dev, | |
250 | struct device_attribute *da, char *buf) | |
251 | { | |
252 | struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); | |
38c75dc3 | 253 | struct max16065_data *data = dev_get_drvdata(dev); |
f5bae264 GR |
254 | |
255 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
256 | data->limit[attr2->nr][attr2->index]); | |
257 | } | |
258 | ||
259 | /* Construct a sensor_device_attribute structure for each register */ | |
260 | ||
261 | /* Input voltages */ | |
262 | static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, max16065_show_input, NULL, 0); | |
263 | static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, max16065_show_input, NULL, 1); | |
264 | static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, max16065_show_input, NULL, 2); | |
265 | static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, max16065_show_input, NULL, 3); | |
266 | static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, max16065_show_input, NULL, 4); | |
267 | static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, max16065_show_input, NULL, 5); | |
268 | static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, max16065_show_input, NULL, 6); | |
269 | static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, max16065_show_input, NULL, 7); | |
270 | static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, max16065_show_input, NULL, 8); | |
271 | static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, max16065_show_input, NULL, 9); | |
272 | static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, max16065_show_input, NULL, 10); | |
273 | static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, max16065_show_input, NULL, 11); | |
274 | static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, max16065_show_input, NULL, 12); | |
275 | ||
276 | /* Input voltages lcrit */ | |
277 | static SENSOR_DEVICE_ATTR_2(in0_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
278 | max16065_set_limit, 2, 0); | |
279 | static SENSOR_DEVICE_ATTR_2(in1_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
280 | max16065_set_limit, 2, 1); | |
281 | static SENSOR_DEVICE_ATTR_2(in2_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
282 | max16065_set_limit, 2, 2); | |
283 | static SENSOR_DEVICE_ATTR_2(in3_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
284 | max16065_set_limit, 2, 3); | |
285 | static SENSOR_DEVICE_ATTR_2(in4_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
286 | max16065_set_limit, 2, 4); | |
287 | static SENSOR_DEVICE_ATTR_2(in5_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
288 | max16065_set_limit, 2, 5); | |
289 | static SENSOR_DEVICE_ATTR_2(in6_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
290 | max16065_set_limit, 2, 6); | |
291 | static SENSOR_DEVICE_ATTR_2(in7_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
292 | max16065_set_limit, 2, 7); | |
293 | static SENSOR_DEVICE_ATTR_2(in8_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
294 | max16065_set_limit, 2, 8); | |
295 | static SENSOR_DEVICE_ATTR_2(in9_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
296 | max16065_set_limit, 2, 9); | |
297 | static SENSOR_DEVICE_ATTR_2(in10_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
298 | max16065_set_limit, 2, 10); | |
299 | static SENSOR_DEVICE_ATTR_2(in11_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
300 | max16065_set_limit, 2, 11); | |
301 | ||
302 | /* Input voltages crit */ | |
303 | static SENSOR_DEVICE_ATTR_2(in0_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
304 | max16065_set_limit, 1, 0); | |
305 | static SENSOR_DEVICE_ATTR_2(in1_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
306 | max16065_set_limit, 1, 1); | |
307 | static SENSOR_DEVICE_ATTR_2(in2_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
308 | max16065_set_limit, 1, 2); | |
309 | static SENSOR_DEVICE_ATTR_2(in3_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
310 | max16065_set_limit, 1, 3); | |
311 | static SENSOR_DEVICE_ATTR_2(in4_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
312 | max16065_set_limit, 1, 4); | |
313 | static SENSOR_DEVICE_ATTR_2(in5_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
314 | max16065_set_limit, 1, 5); | |
315 | static SENSOR_DEVICE_ATTR_2(in6_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
316 | max16065_set_limit, 1, 6); | |
317 | static SENSOR_DEVICE_ATTR_2(in7_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
318 | max16065_set_limit, 1, 7); | |
319 | static SENSOR_DEVICE_ATTR_2(in8_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
320 | max16065_set_limit, 1, 8); | |
321 | static SENSOR_DEVICE_ATTR_2(in9_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
322 | max16065_set_limit, 1, 9); | |
323 | static SENSOR_DEVICE_ATTR_2(in10_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
324 | max16065_set_limit, 1, 10); | |
325 | static SENSOR_DEVICE_ATTR_2(in11_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
326 | max16065_set_limit, 1, 11); | |
327 | ||
328 | /* Input voltages min */ | |
329 | static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
330 | max16065_set_limit, 0, 0); | |
331 | static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
332 | max16065_set_limit, 0, 1); | |
333 | static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
334 | max16065_set_limit, 0, 2); | |
335 | static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
336 | max16065_set_limit, 0, 3); | |
337 | static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
338 | max16065_set_limit, 0, 4); | |
339 | static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
340 | max16065_set_limit, 0, 5); | |
341 | static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
342 | max16065_set_limit, 0, 6); | |
343 | static SENSOR_DEVICE_ATTR_2(in7_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
344 | max16065_set_limit, 0, 7); | |
345 | static SENSOR_DEVICE_ATTR_2(in8_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
346 | max16065_set_limit, 0, 8); | |
347 | static SENSOR_DEVICE_ATTR_2(in9_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
348 | max16065_set_limit, 0, 9); | |
349 | static SENSOR_DEVICE_ATTR_2(in10_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
350 | max16065_set_limit, 0, 10); | |
351 | static SENSOR_DEVICE_ATTR_2(in11_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
352 | max16065_set_limit, 0, 11); | |
353 | ||
354 | /* Input voltages max */ | |
355 | static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
356 | max16065_set_limit, 0, 0); | |
357 | static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
358 | max16065_set_limit, 0, 1); | |
359 | static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
360 | max16065_set_limit, 0, 2); | |
361 | static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
362 | max16065_set_limit, 0, 3); | |
363 | static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
364 | max16065_set_limit, 0, 4); | |
365 | static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
366 | max16065_set_limit, 0, 5); | |
367 | static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
368 | max16065_set_limit, 0, 6); | |
369 | static SENSOR_DEVICE_ATTR_2(in7_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
370 | max16065_set_limit, 0, 7); | |
371 | static SENSOR_DEVICE_ATTR_2(in8_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
372 | max16065_set_limit, 0, 8); | |
373 | static SENSOR_DEVICE_ATTR_2(in9_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
374 | max16065_set_limit, 0, 9); | |
375 | static SENSOR_DEVICE_ATTR_2(in10_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
376 | max16065_set_limit, 0, 10); | |
377 | static SENSOR_DEVICE_ATTR_2(in11_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
378 | max16065_set_limit, 0, 11); | |
379 | ||
380 | /* alarms */ | |
381 | static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
382 | 0, 0); | |
383 | static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
384 | 0, 1); | |
385 | static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
386 | 0, 2); | |
387 | static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
388 | 0, 3); | |
389 | static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
390 | 0, 4); | |
391 | static SENSOR_DEVICE_ATTR_2(in5_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
392 | 0, 5); | |
393 | static SENSOR_DEVICE_ATTR_2(in6_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
394 | 0, 6); | |
395 | static SENSOR_DEVICE_ATTR_2(in7_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
396 | 0, 7); | |
397 | static SENSOR_DEVICE_ATTR_2(in8_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
398 | 1, 0); | |
399 | static SENSOR_DEVICE_ATTR_2(in9_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
400 | 1, 1); | |
401 | static SENSOR_DEVICE_ATTR_2(in10_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
402 | 1, 2); | |
403 | static SENSOR_DEVICE_ATTR_2(in11_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
404 | 1, 3); | |
405 | ||
406 | /* Current and alarm */ | |
407 | static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, max16065_show_current, NULL, 0); | |
408 | static SENSOR_DEVICE_ATTR_2(curr1_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
409 | 1, 4); | |
410 | ||
411 | /* | |
412 | * Finally, construct an array of pointers to members of the above objects, | |
413 | * as required for sysfs_create_group() | |
414 | */ | |
415 | static struct attribute *max16065_basic_attributes[] = { | |
416 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
417 | &sensor_dev_attr_in0_lcrit.dev_attr.attr, | |
418 | &sensor_dev_attr_in0_crit.dev_attr.attr, | |
419 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
420 | ||
421 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
422 | &sensor_dev_attr_in1_lcrit.dev_attr.attr, | |
423 | &sensor_dev_attr_in1_crit.dev_attr.attr, | |
424 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
425 | ||
426 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
427 | &sensor_dev_attr_in2_lcrit.dev_attr.attr, | |
428 | &sensor_dev_attr_in2_crit.dev_attr.attr, | |
429 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
430 | ||
431 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
432 | &sensor_dev_attr_in3_lcrit.dev_attr.attr, | |
433 | &sensor_dev_attr_in3_crit.dev_attr.attr, | |
434 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
435 | ||
436 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
437 | &sensor_dev_attr_in4_lcrit.dev_attr.attr, | |
438 | &sensor_dev_attr_in4_crit.dev_attr.attr, | |
439 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
440 | ||
441 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
442 | &sensor_dev_attr_in5_lcrit.dev_attr.attr, | |
443 | &sensor_dev_attr_in5_crit.dev_attr.attr, | |
444 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
445 | ||
446 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
447 | &sensor_dev_attr_in6_lcrit.dev_attr.attr, | |
448 | &sensor_dev_attr_in6_crit.dev_attr.attr, | |
449 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
450 | ||
451 | &sensor_dev_attr_in7_input.dev_attr.attr, | |
452 | &sensor_dev_attr_in7_lcrit.dev_attr.attr, | |
453 | &sensor_dev_attr_in7_crit.dev_attr.attr, | |
454 | &sensor_dev_attr_in7_alarm.dev_attr.attr, | |
455 | ||
456 | &sensor_dev_attr_in8_input.dev_attr.attr, | |
457 | &sensor_dev_attr_in8_lcrit.dev_attr.attr, | |
458 | &sensor_dev_attr_in8_crit.dev_attr.attr, | |
459 | &sensor_dev_attr_in8_alarm.dev_attr.attr, | |
460 | ||
461 | &sensor_dev_attr_in9_input.dev_attr.attr, | |
462 | &sensor_dev_attr_in9_lcrit.dev_attr.attr, | |
463 | &sensor_dev_attr_in9_crit.dev_attr.attr, | |
464 | &sensor_dev_attr_in9_alarm.dev_attr.attr, | |
465 | ||
466 | &sensor_dev_attr_in10_input.dev_attr.attr, | |
467 | &sensor_dev_attr_in10_lcrit.dev_attr.attr, | |
468 | &sensor_dev_attr_in10_crit.dev_attr.attr, | |
469 | &sensor_dev_attr_in10_alarm.dev_attr.attr, | |
470 | ||
471 | &sensor_dev_attr_in11_input.dev_attr.attr, | |
472 | &sensor_dev_attr_in11_lcrit.dev_attr.attr, | |
473 | &sensor_dev_attr_in11_crit.dev_attr.attr, | |
474 | &sensor_dev_attr_in11_alarm.dev_attr.attr, | |
475 | ||
476 | NULL | |
477 | }; | |
478 | ||
479 | static struct attribute *max16065_current_attributes[] = { | |
480 | &sensor_dev_attr_in12_input.dev_attr.attr, | |
481 | &sensor_dev_attr_curr1_input.dev_attr.attr, | |
482 | &sensor_dev_attr_curr1_alarm.dev_attr.attr, | |
483 | NULL | |
484 | }; | |
485 | ||
486 | static struct attribute *max16065_min_attributes[] = { | |
487 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
488 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
489 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
490 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
491 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
492 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
493 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
494 | &sensor_dev_attr_in7_min.dev_attr.attr, | |
495 | &sensor_dev_attr_in8_min.dev_attr.attr, | |
496 | &sensor_dev_attr_in9_min.dev_attr.attr, | |
497 | &sensor_dev_attr_in10_min.dev_attr.attr, | |
498 | &sensor_dev_attr_in11_min.dev_attr.attr, | |
499 | NULL | |
500 | }; | |
501 | ||
502 | static struct attribute *max16065_max_attributes[] = { | |
503 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
504 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
505 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
506 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
507 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
508 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
509 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
510 | &sensor_dev_attr_in7_max.dev_attr.attr, | |
511 | &sensor_dev_attr_in8_max.dev_attr.attr, | |
512 | &sensor_dev_attr_in9_max.dev_attr.attr, | |
513 | &sensor_dev_attr_in10_max.dev_attr.attr, | |
514 | &sensor_dev_attr_in11_max.dev_attr.attr, | |
515 | NULL | |
516 | }; | |
517 | ||
38c75dc3 GR |
518 | static umode_t max16065_basic_is_visible(struct kobject *kobj, |
519 | struct attribute *a, int n) | |
520 | { | |
521 | struct device *dev = container_of(kobj, struct device, kobj); | |
522 | struct max16065_data *data = dev_get_drvdata(dev); | |
523 | int index = n / 4; | |
524 | ||
525 | if (index >= data->num_adc || !data->range[index]) | |
526 | return 0; | |
527 | return a->mode; | |
528 | } | |
529 | ||
530 | static umode_t max16065_secondary_is_visible(struct kobject *kobj, | |
531 | struct attribute *a, int index) | |
532 | { | |
533 | struct device *dev = container_of(kobj, struct device, kobj); | |
534 | struct max16065_data *data = dev_get_drvdata(dev); | |
535 | ||
536 | if (index >= data->num_adc) | |
537 | return 0; | |
538 | return a->mode; | |
539 | } | |
540 | ||
f5bae264 GR |
541 | static const struct attribute_group max16065_basic_group = { |
542 | .attrs = max16065_basic_attributes, | |
38c75dc3 | 543 | .is_visible = max16065_basic_is_visible, |
f5bae264 GR |
544 | }; |
545 | ||
546 | static const struct attribute_group max16065_current_group = { | |
547 | .attrs = max16065_current_attributes, | |
548 | }; | |
549 | ||
550 | static const struct attribute_group max16065_min_group = { | |
551 | .attrs = max16065_min_attributes, | |
38c75dc3 | 552 | .is_visible = max16065_secondary_is_visible, |
f5bae264 GR |
553 | }; |
554 | ||
555 | static const struct attribute_group max16065_max_group = { | |
556 | .attrs = max16065_max_attributes, | |
38c75dc3 | 557 | .is_visible = max16065_secondary_is_visible, |
f5bae264 GR |
558 | }; |
559 | ||
f5bae264 GR |
560 | static int max16065_probe(struct i2c_client *client, |
561 | const struct i2c_device_id *id) | |
562 | { | |
563 | struct i2c_adapter *adapter = client->adapter; | |
564 | struct max16065_data *data; | |
38c75dc3 GR |
565 | struct device *dev = &client->dev; |
566 | struct device *hwmon_dev; | |
567 | int i, j, val; | |
f5bae264 GR |
568 | bool have_secondary; /* true if chip has secondary limits */ |
569 | bool secondary_is_max = false; /* secondary limits reflect max */ | |
38c75dc3 | 570 | int groups = 0; |
f5bae264 GR |
571 | |
572 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | |
573 | | I2C_FUNC_SMBUS_READ_WORD_DATA)) | |
574 | return -ENODEV; | |
575 | ||
38c75dc3 | 576 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
f5bae264 GR |
577 | if (unlikely(!data)) |
578 | return -ENOMEM; | |
579 | ||
38c75dc3 | 580 | data->client = client; |
f5bae264 GR |
581 | mutex_init(&data->update_lock); |
582 | ||
583 | data->num_adc = max16065_num_adc[id->driver_data]; | |
584 | data->have_current = max16065_have_current[id->driver_data]; | |
585 | have_secondary = max16065_have_secondary[id->driver_data]; | |
586 | ||
587 | if (have_secondary) { | |
588 | val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE); | |
918ddef3 GR |
589 | if (unlikely(val < 0)) |
590 | return val; | |
f5bae264 GR |
591 | secondary_is_max = val & MAX16065_WARNING_OV; |
592 | } | |
593 | ||
594 | /* Read scale registers, convert to range */ | |
595 | for (i = 0; i < DIV_ROUND_UP(data->num_adc, 4); i++) { | |
596 | val = i2c_smbus_read_byte_data(client, MAX16065_SCALE(i)); | |
918ddef3 GR |
597 | if (unlikely(val < 0)) |
598 | return val; | |
f5bae264 GR |
599 | for (j = 0; j < 4 && i * 4 + j < data->num_adc; j++) { |
600 | data->range[i * 4 + j] = | |
601 | max16065_adc_range[(val >> (j * 2)) & 0x3]; | |
602 | } | |
603 | } | |
604 | ||
605 | /* Read limits */ | |
606 | for (i = 0; i < MAX16065_NUM_LIMIT; i++) { | |
607 | if (i == 0 && !have_secondary) | |
608 | continue; | |
609 | ||
610 | for (j = 0; j < data->num_adc; j++) { | |
611 | val = i2c_smbus_read_byte_data(client, | |
612 | MAX16065_LIMIT(i, j)); | |
918ddef3 GR |
613 | if (unlikely(val < 0)) |
614 | return val; | |
f5bae264 GR |
615 | data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]); |
616 | } | |
617 | } | |
618 | ||
38c75dc3 GR |
619 | /* sysfs hooks */ |
620 | data->groups[groups++] = &max16065_basic_group; | |
621 | if (have_secondary) | |
622 | data->groups[groups++] = secondary_is_max ? | |
623 | &max16065_max_group : &max16065_min_group; | |
f5bae264 GR |
624 | |
625 | if (data->have_current) { | |
626 | val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL); | |
38c75dc3 GR |
627 | if (unlikely(val < 0)) |
628 | return val; | |
f5bae264 GR |
629 | if (val & MAX16065_CURR_ENABLE) { |
630 | /* | |
631 | * Current gain is 6, 12, 24, 48 based on values in | |
632 | * bit 2,3. | |
633 | */ | |
634 | data->curr_gain = 6 << ((val >> 2) & 0x03); | |
635 | data->range[MAX16065_NUM_ADC] | |
636 | = max16065_csp_adc_range[(val >> 1) & 0x01]; | |
38c75dc3 | 637 | data->groups[groups++] = &max16065_current_group; |
f5bae264 GR |
638 | } else { |
639 | data->have_current = false; | |
640 | } | |
641 | } | |
642 | ||
38c75dc3 GR |
643 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
644 | data, data->groups); | |
645 | if (unlikely(IS_ERR(hwmon_dev))) | |
646 | return PTR_ERR(hwmon_dev); | |
f5bae264 GR |
647 | |
648 | return 0; | |
649 | } | |
650 | ||
651 | static const struct i2c_device_id max16065_id[] = { | |
652 | { "max16065", max16065 }, | |
653 | { "max16066", max16066 }, | |
654 | { "max16067", max16067 }, | |
655 | { "max16068", max16068 }, | |
656 | { "max16070", max16070 }, | |
657 | { "max16071", max16071 }, | |
658 | { } | |
659 | }; | |
660 | ||
661 | MODULE_DEVICE_TABLE(i2c, max16065_id); | |
662 | ||
663 | /* This is the driver that will be inserted */ | |
664 | static struct i2c_driver max16065_driver = { | |
665 | .driver = { | |
666 | .name = "max16065", | |
667 | }, | |
668 | .probe = max16065_probe, | |
f5bae264 GR |
669 | .id_table = max16065_id, |
670 | }; | |
671 | ||
f0967eea | 672 | module_i2c_driver(max16065_driver); |
f5bae264 | 673 | |
bb9a80e5 | 674 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); |
f5bae264 GR |
675 | MODULE_DESCRIPTION("MAX16065 driver"); |
676 | MODULE_LICENSE("GPL"); |