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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; | |
86 | struct device *hwmon_dev; | |
87 | struct mutex update_lock; | |
88 | bool valid; | |
89 | unsigned long last_updated; /* in jiffies */ | |
90 | int num_adc; | |
91 | bool have_current; | |
92 | int curr_gain; | |
93 | /* limits are in mV */ | |
94 | int limit[MAX16065_NUM_LIMIT][MAX16065_NUM_ADC]; | |
95 | int range[MAX16065_NUM_ADC + 1];/* voltage range */ | |
96 | int adc[MAX16065_NUM_ADC + 1]; /* adc values (raw) including csp_adc */ | |
97 | int curr_sense; | |
98 | int fault[2]; | |
99 | }; | |
100 | ||
101 | static const int max16065_adc_range[] = { 5560, 2780, 1390, 0 }; | |
102 | static const int max16065_csp_adc_range[] = { 7000, 14000 }; | |
103 | ||
104 | /* ADC registers have 10 bit resolution. */ | |
105 | static inline int ADC_TO_MV(int adc, int range) | |
106 | { | |
107 | return (adc * range) / 1024; | |
108 | } | |
109 | ||
110 | /* | |
111 | * Limit registers have 8 bit resolution and match upper 8 bits of ADC | |
112 | * registers. | |
113 | */ | |
114 | static inline int LIMIT_TO_MV(int limit, int range) | |
115 | { | |
116 | return limit * range / 256; | |
117 | } | |
118 | ||
119 | static inline int MV_TO_LIMIT(int mv, int range) | |
120 | { | |
2a844c14 | 121 | return clamp_val(DIV_ROUND_CLOSEST(mv * 256, range), 0, 255); |
f5bae264 GR |
122 | } |
123 | ||
124 | static inline int ADC_TO_CURR(int adc, int gain) | |
125 | { | |
ff71c182 | 126 | return adc * 1400000 / (gain * 255); |
f5bae264 GR |
127 | } |
128 | ||
129 | /* | |
130 | * max16065_read_adc() | |
131 | * | |
132 | * Read 16 bit value from <reg>, <reg+1>. | |
133 | * Upper 8 bits are in <reg>, lower 2 bits are in bits 7:6 of <reg+1>. | |
134 | */ | |
135 | static int max16065_read_adc(struct i2c_client *client, int reg) | |
136 | { | |
137 | int rv; | |
138 | ||
90f4102c | 139 | rv = i2c_smbus_read_word_swapped(client, reg); |
f5bae264 GR |
140 | if (unlikely(rv < 0)) |
141 | return rv; | |
90f4102c | 142 | return rv >> 6; |
f5bae264 GR |
143 | } |
144 | ||
145 | static struct max16065_data *max16065_update_device(struct device *dev) | |
146 | { | |
147 | struct i2c_client *client = to_i2c_client(dev); | |
148 | struct max16065_data *data = i2c_get_clientdata(client); | |
149 | ||
150 | mutex_lock(&data->update_lock); | |
151 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
152 | int i; | |
153 | ||
154 | for (i = 0; i < data->num_adc; i++) | |
155 | data->adc[i] | |
156 | = max16065_read_adc(client, MAX16065_ADC(i)); | |
157 | ||
158 | if (data->have_current) { | |
159 | data->adc[MAX16065_NUM_ADC] | |
160 | = max16065_read_adc(client, MAX16065_CSP_ADC); | |
161 | data->curr_sense | |
162 | = i2c_smbus_read_byte_data(client, | |
163 | MAX16065_CURR_SENSE); | |
164 | } | |
165 | ||
166 | for (i = 0; i < DIV_ROUND_UP(data->num_adc, 8); i++) | |
167 | data->fault[i] | |
168 | = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i)); | |
169 | ||
170 | data->last_updated = jiffies; | |
171 | data->valid = 1; | |
172 | } | |
173 | mutex_unlock(&data->update_lock); | |
174 | return data; | |
175 | } | |
176 | ||
177 | static ssize_t max16065_show_alarm(struct device *dev, | |
178 | struct device_attribute *da, char *buf) | |
179 | { | |
180 | struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); | |
181 | struct max16065_data *data = max16065_update_device(dev); | |
182 | int val = data->fault[attr2->nr]; | |
183 | ||
184 | if (val < 0) | |
185 | return val; | |
186 | ||
187 | val &= (1 << attr2->index); | |
188 | if (val) | |
189 | i2c_smbus_write_byte_data(to_i2c_client(dev), | |
190 | MAX16065_FAULT(attr2->nr), val); | |
191 | ||
192 | return snprintf(buf, PAGE_SIZE, "%d\n", !!val); | |
193 | } | |
194 | ||
195 | static ssize_t max16065_show_input(struct device *dev, | |
196 | struct device_attribute *da, char *buf) | |
197 | { | |
198 | struct sensor_device_attribute *attr = to_sensor_dev_attr(da); | |
199 | struct max16065_data *data = max16065_update_device(dev); | |
200 | int adc = data->adc[attr->index]; | |
201 | ||
202 | if (unlikely(adc < 0)) | |
203 | return adc; | |
204 | ||
205 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
206 | ADC_TO_MV(adc, data->range[attr->index])); | |
207 | } | |
208 | ||
209 | static ssize_t max16065_show_current(struct device *dev, | |
210 | struct device_attribute *da, char *buf) | |
211 | { | |
212 | struct max16065_data *data = max16065_update_device(dev); | |
213 | ||
214 | if (unlikely(data->curr_sense < 0)) | |
215 | return data->curr_sense; | |
216 | ||
217 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
218 | ADC_TO_CURR(data->curr_sense, data->curr_gain)); | |
219 | } | |
220 | ||
221 | static ssize_t max16065_set_limit(struct device *dev, | |
222 | struct device_attribute *da, | |
223 | const char *buf, size_t count) | |
224 | { | |
225 | struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da); | |
226 | struct i2c_client *client = to_i2c_client(dev); | |
227 | struct max16065_data *data = i2c_get_clientdata(client); | |
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]); | |
241 | i2c_smbus_write_byte_data(client, | |
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); | |
253 | struct i2c_client *client = to_i2c_client(dev); | |
254 | struct max16065_data *data = i2c_get_clientdata(client); | |
255 | ||
256 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
257 | data->limit[attr2->nr][attr2->index]); | |
258 | } | |
259 | ||
260 | /* Construct a sensor_device_attribute structure for each register */ | |
261 | ||
262 | /* Input voltages */ | |
263 | static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, max16065_show_input, NULL, 0); | |
264 | static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, max16065_show_input, NULL, 1); | |
265 | static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, max16065_show_input, NULL, 2); | |
266 | static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, max16065_show_input, NULL, 3); | |
267 | static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, max16065_show_input, NULL, 4); | |
268 | static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, max16065_show_input, NULL, 5); | |
269 | static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, max16065_show_input, NULL, 6); | |
270 | static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, max16065_show_input, NULL, 7); | |
271 | static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, max16065_show_input, NULL, 8); | |
272 | static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, max16065_show_input, NULL, 9); | |
273 | static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, max16065_show_input, NULL, 10); | |
274 | static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, max16065_show_input, NULL, 11); | |
275 | static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, max16065_show_input, NULL, 12); | |
276 | ||
277 | /* Input voltages lcrit */ | |
278 | static SENSOR_DEVICE_ATTR_2(in0_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
279 | max16065_set_limit, 2, 0); | |
280 | static SENSOR_DEVICE_ATTR_2(in1_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
281 | max16065_set_limit, 2, 1); | |
282 | static SENSOR_DEVICE_ATTR_2(in2_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
283 | max16065_set_limit, 2, 2); | |
284 | static SENSOR_DEVICE_ATTR_2(in3_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
285 | max16065_set_limit, 2, 3); | |
286 | static SENSOR_DEVICE_ATTR_2(in4_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
287 | max16065_set_limit, 2, 4); | |
288 | static SENSOR_DEVICE_ATTR_2(in5_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
289 | max16065_set_limit, 2, 5); | |
290 | static SENSOR_DEVICE_ATTR_2(in6_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
291 | max16065_set_limit, 2, 6); | |
292 | static SENSOR_DEVICE_ATTR_2(in7_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
293 | max16065_set_limit, 2, 7); | |
294 | static SENSOR_DEVICE_ATTR_2(in8_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
295 | max16065_set_limit, 2, 8); | |
296 | static SENSOR_DEVICE_ATTR_2(in9_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
297 | max16065_set_limit, 2, 9); | |
298 | static SENSOR_DEVICE_ATTR_2(in10_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
299 | max16065_set_limit, 2, 10); | |
300 | static SENSOR_DEVICE_ATTR_2(in11_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
301 | max16065_set_limit, 2, 11); | |
302 | ||
303 | /* Input voltages crit */ | |
304 | static SENSOR_DEVICE_ATTR_2(in0_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
305 | max16065_set_limit, 1, 0); | |
306 | static SENSOR_DEVICE_ATTR_2(in1_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
307 | max16065_set_limit, 1, 1); | |
308 | static SENSOR_DEVICE_ATTR_2(in2_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
309 | max16065_set_limit, 1, 2); | |
310 | static SENSOR_DEVICE_ATTR_2(in3_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
311 | max16065_set_limit, 1, 3); | |
312 | static SENSOR_DEVICE_ATTR_2(in4_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
313 | max16065_set_limit, 1, 4); | |
314 | static SENSOR_DEVICE_ATTR_2(in5_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
315 | max16065_set_limit, 1, 5); | |
316 | static SENSOR_DEVICE_ATTR_2(in6_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
317 | max16065_set_limit, 1, 6); | |
318 | static SENSOR_DEVICE_ATTR_2(in7_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
319 | max16065_set_limit, 1, 7); | |
320 | static SENSOR_DEVICE_ATTR_2(in8_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
321 | max16065_set_limit, 1, 8); | |
322 | static SENSOR_DEVICE_ATTR_2(in9_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
323 | max16065_set_limit, 1, 9); | |
324 | static SENSOR_DEVICE_ATTR_2(in10_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
325 | max16065_set_limit, 1, 10); | |
326 | static SENSOR_DEVICE_ATTR_2(in11_crit, S_IWUSR | S_IRUGO, max16065_show_limit, | |
327 | max16065_set_limit, 1, 11); | |
328 | ||
329 | /* Input voltages min */ | |
330 | static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
331 | max16065_set_limit, 0, 0); | |
332 | static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
333 | max16065_set_limit, 0, 1); | |
334 | static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
335 | max16065_set_limit, 0, 2); | |
336 | static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
337 | max16065_set_limit, 0, 3); | |
338 | static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
339 | max16065_set_limit, 0, 4); | |
340 | static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
341 | max16065_set_limit, 0, 5); | |
342 | static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
343 | max16065_set_limit, 0, 6); | |
344 | static SENSOR_DEVICE_ATTR_2(in7_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
345 | max16065_set_limit, 0, 7); | |
346 | static SENSOR_DEVICE_ATTR_2(in8_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
347 | max16065_set_limit, 0, 8); | |
348 | static SENSOR_DEVICE_ATTR_2(in9_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
349 | max16065_set_limit, 0, 9); | |
350 | static SENSOR_DEVICE_ATTR_2(in10_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
351 | max16065_set_limit, 0, 10); | |
352 | static SENSOR_DEVICE_ATTR_2(in11_min, S_IWUSR | S_IRUGO, max16065_show_limit, | |
353 | max16065_set_limit, 0, 11); | |
354 | ||
355 | /* Input voltages max */ | |
356 | static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
357 | max16065_set_limit, 0, 0); | |
358 | static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
359 | max16065_set_limit, 0, 1); | |
360 | static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
361 | max16065_set_limit, 0, 2); | |
362 | static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
363 | max16065_set_limit, 0, 3); | |
364 | static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
365 | max16065_set_limit, 0, 4); | |
366 | static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
367 | max16065_set_limit, 0, 5); | |
368 | static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
369 | max16065_set_limit, 0, 6); | |
370 | static SENSOR_DEVICE_ATTR_2(in7_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
371 | max16065_set_limit, 0, 7); | |
372 | static SENSOR_DEVICE_ATTR_2(in8_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
373 | max16065_set_limit, 0, 8); | |
374 | static SENSOR_DEVICE_ATTR_2(in9_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
375 | max16065_set_limit, 0, 9); | |
376 | static SENSOR_DEVICE_ATTR_2(in10_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
377 | max16065_set_limit, 0, 10); | |
378 | static SENSOR_DEVICE_ATTR_2(in11_max, S_IWUSR | S_IRUGO, max16065_show_limit, | |
379 | max16065_set_limit, 0, 11); | |
380 | ||
381 | /* alarms */ | |
382 | static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
383 | 0, 0); | |
384 | static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
385 | 0, 1); | |
386 | static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
387 | 0, 2); | |
388 | static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
389 | 0, 3); | |
390 | static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
391 | 0, 4); | |
392 | static SENSOR_DEVICE_ATTR_2(in5_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
393 | 0, 5); | |
394 | static SENSOR_DEVICE_ATTR_2(in6_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
395 | 0, 6); | |
396 | static SENSOR_DEVICE_ATTR_2(in7_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
397 | 0, 7); | |
398 | static SENSOR_DEVICE_ATTR_2(in8_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
399 | 1, 0); | |
400 | static SENSOR_DEVICE_ATTR_2(in9_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
401 | 1, 1); | |
402 | static SENSOR_DEVICE_ATTR_2(in10_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
403 | 1, 2); | |
404 | static SENSOR_DEVICE_ATTR_2(in11_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
405 | 1, 3); | |
406 | ||
407 | /* Current and alarm */ | |
408 | static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, max16065_show_current, NULL, 0); | |
409 | static SENSOR_DEVICE_ATTR_2(curr1_alarm, S_IRUGO, max16065_show_alarm, NULL, | |
410 | 1, 4); | |
411 | ||
412 | /* | |
413 | * Finally, construct an array of pointers to members of the above objects, | |
414 | * as required for sysfs_create_group() | |
415 | */ | |
416 | static struct attribute *max16065_basic_attributes[] = { | |
417 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
418 | &sensor_dev_attr_in0_lcrit.dev_attr.attr, | |
419 | &sensor_dev_attr_in0_crit.dev_attr.attr, | |
420 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
421 | ||
422 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
423 | &sensor_dev_attr_in1_lcrit.dev_attr.attr, | |
424 | &sensor_dev_attr_in1_crit.dev_attr.attr, | |
425 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
426 | ||
427 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
428 | &sensor_dev_attr_in2_lcrit.dev_attr.attr, | |
429 | &sensor_dev_attr_in2_crit.dev_attr.attr, | |
430 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
431 | ||
432 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
433 | &sensor_dev_attr_in3_lcrit.dev_attr.attr, | |
434 | &sensor_dev_attr_in3_crit.dev_attr.attr, | |
435 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
436 | ||
437 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
438 | &sensor_dev_attr_in4_lcrit.dev_attr.attr, | |
439 | &sensor_dev_attr_in4_crit.dev_attr.attr, | |
440 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
441 | ||
442 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
443 | &sensor_dev_attr_in5_lcrit.dev_attr.attr, | |
444 | &sensor_dev_attr_in5_crit.dev_attr.attr, | |
445 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
446 | ||
447 | &sensor_dev_attr_in6_input.dev_attr.attr, | |
448 | &sensor_dev_attr_in6_lcrit.dev_attr.attr, | |
449 | &sensor_dev_attr_in6_crit.dev_attr.attr, | |
450 | &sensor_dev_attr_in6_alarm.dev_attr.attr, | |
451 | ||
452 | &sensor_dev_attr_in7_input.dev_attr.attr, | |
453 | &sensor_dev_attr_in7_lcrit.dev_attr.attr, | |
454 | &sensor_dev_attr_in7_crit.dev_attr.attr, | |
455 | &sensor_dev_attr_in7_alarm.dev_attr.attr, | |
456 | ||
457 | &sensor_dev_attr_in8_input.dev_attr.attr, | |
458 | &sensor_dev_attr_in8_lcrit.dev_attr.attr, | |
459 | &sensor_dev_attr_in8_crit.dev_attr.attr, | |
460 | &sensor_dev_attr_in8_alarm.dev_attr.attr, | |
461 | ||
462 | &sensor_dev_attr_in9_input.dev_attr.attr, | |
463 | &sensor_dev_attr_in9_lcrit.dev_attr.attr, | |
464 | &sensor_dev_attr_in9_crit.dev_attr.attr, | |
465 | &sensor_dev_attr_in9_alarm.dev_attr.attr, | |
466 | ||
467 | &sensor_dev_attr_in10_input.dev_attr.attr, | |
468 | &sensor_dev_attr_in10_lcrit.dev_attr.attr, | |
469 | &sensor_dev_attr_in10_crit.dev_attr.attr, | |
470 | &sensor_dev_attr_in10_alarm.dev_attr.attr, | |
471 | ||
472 | &sensor_dev_attr_in11_input.dev_attr.attr, | |
473 | &sensor_dev_attr_in11_lcrit.dev_attr.attr, | |
474 | &sensor_dev_attr_in11_crit.dev_attr.attr, | |
475 | &sensor_dev_attr_in11_alarm.dev_attr.attr, | |
476 | ||
477 | NULL | |
478 | }; | |
479 | ||
480 | static struct attribute *max16065_current_attributes[] = { | |
481 | &sensor_dev_attr_in12_input.dev_attr.attr, | |
482 | &sensor_dev_attr_curr1_input.dev_attr.attr, | |
483 | &sensor_dev_attr_curr1_alarm.dev_attr.attr, | |
484 | NULL | |
485 | }; | |
486 | ||
487 | static struct attribute *max16065_min_attributes[] = { | |
488 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
489 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
490 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
491 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
492 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
493 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
494 | &sensor_dev_attr_in6_min.dev_attr.attr, | |
495 | &sensor_dev_attr_in7_min.dev_attr.attr, | |
496 | &sensor_dev_attr_in8_min.dev_attr.attr, | |
497 | &sensor_dev_attr_in9_min.dev_attr.attr, | |
498 | &sensor_dev_attr_in10_min.dev_attr.attr, | |
499 | &sensor_dev_attr_in11_min.dev_attr.attr, | |
500 | NULL | |
501 | }; | |
502 | ||
503 | static struct attribute *max16065_max_attributes[] = { | |
504 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
505 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
506 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
507 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
508 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
509 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
510 | &sensor_dev_attr_in6_max.dev_attr.attr, | |
511 | &sensor_dev_attr_in7_max.dev_attr.attr, | |
512 | &sensor_dev_attr_in8_max.dev_attr.attr, | |
513 | &sensor_dev_attr_in9_max.dev_attr.attr, | |
514 | &sensor_dev_attr_in10_max.dev_attr.attr, | |
515 | &sensor_dev_attr_in11_max.dev_attr.attr, | |
516 | NULL | |
517 | }; | |
518 | ||
519 | static const struct attribute_group max16065_basic_group = { | |
520 | .attrs = max16065_basic_attributes, | |
521 | }; | |
522 | ||
523 | static const struct attribute_group max16065_current_group = { | |
524 | .attrs = max16065_current_attributes, | |
525 | }; | |
526 | ||
527 | static const struct attribute_group max16065_min_group = { | |
528 | .attrs = max16065_min_attributes, | |
529 | }; | |
530 | ||
531 | static const struct attribute_group max16065_max_group = { | |
532 | .attrs = max16065_max_attributes, | |
533 | }; | |
534 | ||
535 | static void max16065_cleanup(struct i2c_client *client) | |
536 | { | |
537 | sysfs_remove_group(&client->dev.kobj, &max16065_max_group); | |
538 | sysfs_remove_group(&client->dev.kobj, &max16065_min_group); | |
539 | sysfs_remove_group(&client->dev.kobj, &max16065_current_group); | |
540 | sysfs_remove_group(&client->dev.kobj, &max16065_basic_group); | |
541 | } | |
542 | ||
543 | static int max16065_probe(struct i2c_client *client, | |
544 | const struct i2c_device_id *id) | |
545 | { | |
546 | struct i2c_adapter *adapter = client->adapter; | |
547 | struct max16065_data *data; | |
548 | int i, j, val, ret; | |
549 | bool have_secondary; /* true if chip has secondary limits */ | |
550 | bool secondary_is_max = false; /* secondary limits reflect max */ | |
551 | ||
552 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | |
553 | | I2C_FUNC_SMBUS_READ_WORD_DATA)) | |
554 | return -ENODEV; | |
555 | ||
918ddef3 | 556 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
f5bae264 GR |
557 | if (unlikely(!data)) |
558 | return -ENOMEM; | |
559 | ||
560 | i2c_set_clientdata(client, data); | |
561 | mutex_init(&data->update_lock); | |
562 | ||
563 | data->num_adc = max16065_num_adc[id->driver_data]; | |
564 | data->have_current = max16065_have_current[id->driver_data]; | |
565 | have_secondary = max16065_have_secondary[id->driver_data]; | |
566 | ||
567 | if (have_secondary) { | |
568 | val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE); | |
918ddef3 GR |
569 | if (unlikely(val < 0)) |
570 | return val; | |
f5bae264 GR |
571 | secondary_is_max = val & MAX16065_WARNING_OV; |
572 | } | |
573 | ||
574 | /* Read scale registers, convert to range */ | |
575 | for (i = 0; i < DIV_ROUND_UP(data->num_adc, 4); i++) { | |
576 | val = i2c_smbus_read_byte_data(client, MAX16065_SCALE(i)); | |
918ddef3 GR |
577 | if (unlikely(val < 0)) |
578 | return val; | |
f5bae264 GR |
579 | for (j = 0; j < 4 && i * 4 + j < data->num_adc; j++) { |
580 | data->range[i * 4 + j] = | |
581 | max16065_adc_range[(val >> (j * 2)) & 0x3]; | |
582 | } | |
583 | } | |
584 | ||
585 | /* Read limits */ | |
586 | for (i = 0; i < MAX16065_NUM_LIMIT; i++) { | |
587 | if (i == 0 && !have_secondary) | |
588 | continue; | |
589 | ||
590 | for (j = 0; j < data->num_adc; j++) { | |
591 | val = i2c_smbus_read_byte_data(client, | |
592 | MAX16065_LIMIT(i, j)); | |
918ddef3 GR |
593 | if (unlikely(val < 0)) |
594 | return val; | |
f5bae264 GR |
595 | data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]); |
596 | } | |
597 | } | |
598 | ||
599 | /* Register sysfs hooks */ | |
600 | for (i = 0; i < data->num_adc * 4; i++) { | |
601 | /* Do not create sysfs entry if channel is disabled */ | |
602 | if (!data->range[i / 4]) | |
603 | continue; | |
604 | ||
605 | ret = sysfs_create_file(&client->dev.kobj, | |
606 | max16065_basic_attributes[i]); | |
607 | if (unlikely(ret)) | |
608 | goto out; | |
609 | } | |
610 | ||
611 | if (have_secondary) { | |
612 | struct attribute **attr = secondary_is_max ? | |
613 | max16065_max_attributes : max16065_min_attributes; | |
614 | ||
615 | for (i = 0; i < data->num_adc; i++) { | |
616 | if (!data->range[i]) | |
617 | continue; | |
618 | ||
619 | ret = sysfs_create_file(&client->dev.kobj, attr[i]); | |
620 | if (unlikely(ret)) | |
621 | goto out; | |
622 | } | |
623 | } | |
624 | ||
625 | if (data->have_current) { | |
626 | val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL); | |
627 | if (unlikely(val < 0)) { | |
628 | ret = val; | |
629 | goto out; | |
630 | } | |
631 | if (val & MAX16065_CURR_ENABLE) { | |
632 | /* | |
633 | * Current gain is 6, 12, 24, 48 based on values in | |
634 | * bit 2,3. | |
635 | */ | |
636 | data->curr_gain = 6 << ((val >> 2) & 0x03); | |
637 | data->range[MAX16065_NUM_ADC] | |
638 | = max16065_csp_adc_range[(val >> 1) & 0x01]; | |
639 | ret = sysfs_create_group(&client->dev.kobj, | |
640 | &max16065_current_group); | |
641 | if (unlikely(ret)) | |
642 | goto out; | |
643 | } else { | |
644 | data->have_current = false; | |
645 | } | |
646 | } | |
647 | ||
648 | data->hwmon_dev = hwmon_device_register(&client->dev); | |
649 | if (unlikely(IS_ERR(data->hwmon_dev))) { | |
650 | ret = PTR_ERR(data->hwmon_dev); | |
651 | goto out; | |
652 | } | |
653 | return 0; | |
654 | ||
655 | out: | |
656 | max16065_cleanup(client); | |
f5bae264 GR |
657 | return ret; |
658 | } | |
659 | ||
660 | static int max16065_remove(struct i2c_client *client) | |
661 | { | |
662 | struct max16065_data *data = i2c_get_clientdata(client); | |
663 | ||
664 | hwmon_device_unregister(data->hwmon_dev); | |
665 | max16065_cleanup(client); | |
f5bae264 GR |
666 | |
667 | return 0; | |
668 | } | |
669 | ||
670 | static const struct i2c_device_id max16065_id[] = { | |
671 | { "max16065", max16065 }, | |
672 | { "max16066", max16066 }, | |
673 | { "max16067", max16067 }, | |
674 | { "max16068", max16068 }, | |
675 | { "max16070", max16070 }, | |
676 | { "max16071", max16071 }, | |
677 | { } | |
678 | }; | |
679 | ||
680 | MODULE_DEVICE_TABLE(i2c, max16065_id); | |
681 | ||
682 | /* This is the driver that will be inserted */ | |
683 | static struct i2c_driver max16065_driver = { | |
684 | .driver = { | |
685 | .name = "max16065", | |
686 | }, | |
687 | .probe = max16065_probe, | |
688 | .remove = max16065_remove, | |
689 | .id_table = max16065_id, | |
690 | }; | |
691 | ||
f0967eea | 692 | module_i2c_driver(max16065_driver); |
f5bae264 | 693 | |
bb9a80e5 | 694 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); |
f5bae264 GR |
695 | MODULE_DESCRIPTION("MAX16065 driver"); |
696 | MODULE_LICENSE("GPL"); |