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gerrit-public.fairphone.software / kernel / msm-4.9 / 7d380c8f1ed2b6768e1fc496ad373f716160fcf0 / . / drivers / hwmon / max16065.c
blob: e0019c69d1bbcd19b209446146356a82ba7926bb [file] [log] [blame]
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]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>
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]25#include <linux/jiffies.h>
26
27enum 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
57static 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
66static 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
75static 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
84struct 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
101static const int max16065_adc_range[] = { 5560, 2780, 1390, 0 };
102static const int max16065_csp_adc_range[] = { 7000, 14000 };
103
104/* ADC registers have 10 bit resolution. */
105static 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 */
114static inline int LIMIT_TO_MV(int limit, int range)
115{
116 return limit * range / 256;
117}
118
119static inline int MV_TO_LIMIT(int mv, int range)
120{
121 return SENSORS_LIMIT(DIV_ROUND_CLOSEST(mv * 256, range), 0, 255);
122}
123
124static inline int ADC_TO_CURR(int adc, int gain)
125{
Guenter Roeckff71c182011-08-28 13:01:49 -0700[diff] [blame]126 return adc * 1400000 / (gain * 255);
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]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 */
135static int max16065_read_adc(struct i2c_client *client, int reg)
136{
137 int rv;
138
Jean Delvare90f41022011-11-04 12:00:47 +0100[diff] [blame]139 rv = i2c_smbus_read_word_swapped(client, reg);
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]140 if (unlikely(rv < 0))
141 return rv;
Jean Delvare90f41022011-11-04 12:00:47 +0100[diff] [blame]142 return rv >> 6;
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]143}
144
145static 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
177static 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
195static 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
209static 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
221static 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
Frans Meulenbroeks179c4fd2012-01-04 20:58:52 +0100[diff] [blame]232 err = kstrtoul(buf, 10, &val);
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]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
249static 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 */
263static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, max16065_show_input, NULL, 0);
264static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, max16065_show_input, NULL, 1);
265static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, max16065_show_input, NULL, 2);
266static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, max16065_show_input, NULL, 3);
267static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, max16065_show_input, NULL, 4);
268static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, max16065_show_input, NULL, 5);
269static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, max16065_show_input, NULL, 6);
270static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, max16065_show_input, NULL, 7);
271static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, max16065_show_input, NULL, 8);
272static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, max16065_show_input, NULL, 9);
273static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, max16065_show_input, NULL, 10);
274static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, max16065_show_input, NULL, 11);
275static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, max16065_show_input, NULL, 12);
276
277/* Input voltages lcrit */
278static SENSOR_DEVICE_ATTR_2(in0_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
279 max16065_set_limit, 2, 0);
280static SENSOR_DEVICE_ATTR_2(in1_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
281 max16065_set_limit, 2, 1);
282static SENSOR_DEVICE_ATTR_2(in2_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
283 max16065_set_limit, 2, 2);
284static SENSOR_DEVICE_ATTR_2(in3_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
285 max16065_set_limit, 2, 3);
286static SENSOR_DEVICE_ATTR_2(in4_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
287 max16065_set_limit, 2, 4);
288static SENSOR_DEVICE_ATTR_2(in5_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
289 max16065_set_limit, 2, 5);
290static SENSOR_DEVICE_ATTR_2(in6_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
291 max16065_set_limit, 2, 6);
292static SENSOR_DEVICE_ATTR_2(in7_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
293 max16065_set_limit, 2, 7);
294static SENSOR_DEVICE_ATTR_2(in8_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
295 max16065_set_limit, 2, 8);
296static SENSOR_DEVICE_ATTR_2(in9_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
297 max16065_set_limit, 2, 9);
298static SENSOR_DEVICE_ATTR_2(in10_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
299 max16065_set_limit, 2, 10);
300static SENSOR_DEVICE_ATTR_2(in11_lcrit, S_IWUSR | S_IRUGO, max16065_show_limit,
301 max16065_set_limit, 2, 11);
302
303/* Input voltages crit */
304static SENSOR_DEVICE_ATTR_2(in0_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
305 max16065_set_limit, 1, 0);
306static SENSOR_DEVICE_ATTR_2(in1_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
307 max16065_set_limit, 1, 1);
308static SENSOR_DEVICE_ATTR_2(in2_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
309 max16065_set_limit, 1, 2);
310static SENSOR_DEVICE_ATTR_2(in3_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
311 max16065_set_limit, 1, 3);
312static SENSOR_DEVICE_ATTR_2(in4_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
313 max16065_set_limit, 1, 4);
314static SENSOR_DEVICE_ATTR_2(in5_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
315 max16065_set_limit, 1, 5);
316static SENSOR_DEVICE_ATTR_2(in6_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
317 max16065_set_limit, 1, 6);
318static SENSOR_DEVICE_ATTR_2(in7_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
319 max16065_set_limit, 1, 7);
320static SENSOR_DEVICE_ATTR_2(in8_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
321 max16065_set_limit, 1, 8);
322static SENSOR_DEVICE_ATTR_2(in9_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
323 max16065_set_limit, 1, 9);
324static SENSOR_DEVICE_ATTR_2(in10_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
325 max16065_set_limit, 1, 10);
326static SENSOR_DEVICE_ATTR_2(in11_crit, S_IWUSR | S_IRUGO, max16065_show_limit,
327 max16065_set_limit, 1, 11);
328
329/* Input voltages min */
330static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO, max16065_show_limit,
331 max16065_set_limit, 0, 0);
332static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO, max16065_show_limit,
333 max16065_set_limit, 0, 1);
334static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO, max16065_show_limit,
335 max16065_set_limit, 0, 2);
336static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO, max16065_show_limit,
337 max16065_set_limit, 0, 3);
338static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO, max16065_show_limit,
339 max16065_set_limit, 0, 4);
340static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO, max16065_show_limit,
341 max16065_set_limit, 0, 5);
342static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO, max16065_show_limit,
343 max16065_set_limit, 0, 6);
344static SENSOR_DEVICE_ATTR_2(in7_min, S_IWUSR | S_IRUGO, max16065_show_limit,
345 max16065_set_limit, 0, 7);
346static SENSOR_DEVICE_ATTR_2(in8_min, S_IWUSR | S_IRUGO, max16065_show_limit,
347 max16065_set_limit, 0, 8);
348static SENSOR_DEVICE_ATTR_2(in9_min, S_IWUSR | S_IRUGO, max16065_show_limit,
349 max16065_set_limit, 0, 9);
350static SENSOR_DEVICE_ATTR_2(in10_min, S_IWUSR | S_IRUGO, max16065_show_limit,
351 max16065_set_limit, 0, 10);
352static SENSOR_DEVICE_ATTR_2(in11_min, S_IWUSR | S_IRUGO, max16065_show_limit,
353 max16065_set_limit, 0, 11);
354
355/* Input voltages max */
356static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO, max16065_show_limit,
357 max16065_set_limit, 0, 0);
358static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO, max16065_show_limit,
359 max16065_set_limit, 0, 1);
360static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO, max16065_show_limit,
361 max16065_set_limit, 0, 2);
362static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO, max16065_show_limit,
363 max16065_set_limit, 0, 3);
364static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO, max16065_show_limit,
365 max16065_set_limit, 0, 4);
366static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO, max16065_show_limit,
367 max16065_set_limit, 0, 5);
368static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO, max16065_show_limit,
369 max16065_set_limit, 0, 6);
370static SENSOR_DEVICE_ATTR_2(in7_max, S_IWUSR | S_IRUGO, max16065_show_limit,
371 max16065_set_limit, 0, 7);
372static SENSOR_DEVICE_ATTR_2(in8_max, S_IWUSR | S_IRUGO, max16065_show_limit,
373 max16065_set_limit, 0, 8);
374static SENSOR_DEVICE_ATTR_2(in9_max, S_IWUSR | S_IRUGO, max16065_show_limit,
375 max16065_set_limit, 0, 9);
376static SENSOR_DEVICE_ATTR_2(in10_max, S_IWUSR | S_IRUGO, max16065_show_limit,
377 max16065_set_limit, 0, 10);
378static SENSOR_DEVICE_ATTR_2(in11_max, S_IWUSR | S_IRUGO, max16065_show_limit,
379 max16065_set_limit, 0, 11);
380
381/* alarms */
382static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, max16065_show_alarm, NULL,
383 0, 0);
384static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, max16065_show_alarm, NULL,
385 0, 1);
386static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, max16065_show_alarm, NULL,
387 0, 2);
388static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, max16065_show_alarm, NULL,
389 0, 3);
390static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, max16065_show_alarm, NULL,
391 0, 4);
392static SENSOR_DEVICE_ATTR_2(in5_alarm, S_IRUGO, max16065_show_alarm, NULL,
393 0, 5);
394static SENSOR_DEVICE_ATTR_2(in6_alarm, S_IRUGO, max16065_show_alarm, NULL,
395 0, 6);
396static SENSOR_DEVICE_ATTR_2(in7_alarm, S_IRUGO, max16065_show_alarm, NULL,
397 0, 7);
398static SENSOR_DEVICE_ATTR_2(in8_alarm, S_IRUGO, max16065_show_alarm, NULL,
399 1, 0);
400static SENSOR_DEVICE_ATTR_2(in9_alarm, S_IRUGO, max16065_show_alarm, NULL,
401 1, 1);
402static SENSOR_DEVICE_ATTR_2(in10_alarm, S_IRUGO, max16065_show_alarm, NULL,
403 1, 2);
404static SENSOR_DEVICE_ATTR_2(in11_alarm, S_IRUGO, max16065_show_alarm, NULL,
405 1, 3);
406
407/* Current and alarm */
408static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, max16065_show_current, NULL, 0);
409static 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 */
416static 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
480static 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
487static 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
503static 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
519static const struct attribute_group max16065_basic_group = {
520 .attrs = max16065_basic_attributes,
521};
522
523static const struct attribute_group max16065_current_group = {
524 .attrs = max16065_current_attributes,
525};
526
527static const struct attribute_group max16065_min_group = {
528 .attrs = max16065_min_attributes,
529};
530
531static const struct attribute_group max16065_max_group = {
532 .attrs = max16065_max_attributes,
533};
534
535static 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
543static 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
Guenter Roeck918ddef2012-02-22 08:56:46 -0800[diff] [blame]556 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]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);
Guenter Roeck918ddef2012-02-22 08:56:46 -0800[diff] [blame]569 if (unlikely(val < 0))
570 return val;
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]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));
Guenter Roeck918ddef2012-02-22 08:56:46 -0800[diff] [blame]577 if (unlikely(val < 0))
578 return val;
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]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));
Guenter Roeck918ddef2012-02-22 08:56:46 -0800[diff] [blame]593 if (unlikely(val < 0))
594 return val;
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]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
655out:
656 max16065_cleanup(client);
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]657 return ret;
658}
659
660static 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);
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]666
667 return 0;
668}
669
670static 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
680MODULE_DEVICE_TABLE(i2c, max16065_id);
681
682/* This is the driver that will be inserted */
683static 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
Axel Linf0967ee2012-01-20 15:38:18 +0800[diff] [blame]692module_i2c_driver(max16065_driver);
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]693
Guenter Roeckbb9a80e2012-06-22 12:07:25 -0700[diff] [blame]694MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
Guenter Roeckf5bae262011-02-02 08:49:54 -0800[diff] [blame]695MODULE_DESCRIPTION("MAX16065 driver");
696MODULE_LICENSE("GPL");