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192.168.1.100 / T108 / e958203796650e3959a43708d67534bf36f4c83b / . / marvell / linux / drivers / hwmon / max16065.c
blob: 5d0ecc8d56af1c6bf65efd9cece716bc621824fd [file] [log] [blame]
b.liue9582032025-04-17 19:18:16 +0800[diff] [blame^]1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Driver for
4 * Maxim MAX16065/MAX16066 12-Channel/8-Channel, Flash-Configurable
5 * System Managers with Nonvolatile Fault Registers
6 * Maxim MAX16067/MAX16068 6-Channel, Flash-Configurable System Managers
7 * with Nonvolatile Fault Registers
8 * Maxim MAX16070/MAX16071 12-Channel/8-Channel, Flash-Configurable System
9 * Monitors with Nonvolatile Fault Registers
10 *
11 * Copyright (C) 2011 Ericsson AB.
12 */
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/err.h>
18#include <linux/slab.h>
19#include <linux/i2c.h>
20#include <linux/hwmon.h>
21#include <linux/hwmon-sysfs.h>
22#include <linux/jiffies.h>
23
24enum chips { max16065, max16066, max16067, max16068, max16070, max16071 };
25
26/*
27 * Registers
28 */
29#define MAX16065_ADC(x) ((x) * 2)
30
31#define MAX16065_CURR_SENSE 0x18
32#define MAX16065_CSP_ADC 0x19
33#define MAX16065_FAULT(x) (0x1b + (x))
34#define MAX16065_SCALE(x) (0x43 + (x))
35#define MAX16065_CURR_CONTROL 0x47
36#define MAX16065_LIMIT(l, x) (0x48 + (l) + (x) * 3) /*
37 * l: limit
38 * 0: min/max
39 * 1: crit
40 * 2: lcrit
41 * x: ADC index
42 */
43
44#define MAX16065_SW_ENABLE 0x73
45
46#define MAX16065_WARNING_OV (1 << 3) /* Set if secondary threshold is OV
47 warning */
48
49#define MAX16065_CURR_ENABLE (1 << 0)
50
51#define MAX16065_NUM_LIMIT 3
52#define MAX16065_NUM_ADC 12 /* maximum number of ADC channels */
53
54static const int max16065_num_adc[] = {
55 [max16065] = 12,
56 [max16066] = 8,
57 [max16067] = 6,
58 [max16068] = 6,
59 [max16070] = 12,
60 [max16071] = 8,
61};
62
63static const bool max16065_have_secondary[] = {
64 [max16065] = true,
65 [max16066] = true,
66 [max16067] = false,
67 [max16068] = false,
68 [max16070] = true,
69 [max16071] = true,
70};
71
72static const bool max16065_have_current[] = {
73 [max16065] = true,
74 [max16066] = true,
75 [max16067] = false,
76 [max16068] = false,
77 [max16070] = true,
78 [max16071] = true,
79};
80
81struct max16065_data {
82 enum chips type;
83 struct i2c_client *client;
84 const struct attribute_group *groups[4];
85 struct mutex update_lock;
86 bool valid;
87 unsigned long last_updated; /* in jiffies */
88 int num_adc;
89 bool have_current;
90 int curr_gain;
91 /* limits are in mV */
92 int limit[MAX16065_NUM_LIMIT][MAX16065_NUM_ADC];
93 int range[MAX16065_NUM_ADC + 1];/* voltage range */
94 int adc[MAX16065_NUM_ADC + 1]; /* adc values (raw) including csp_adc */
95 int curr_sense;
96 int fault[2];
97};
98
99static const int max16065_adc_range[] = { 5560, 2780, 1390, 0 };
100static const int max16065_csp_adc_range[] = { 7000, 14000 };
101
102/* ADC registers have 10 bit resolution. */
103static inline int ADC_TO_MV(int adc, int range)
104{
105 return (adc * range) / 1024;
106}
107
108/*
109 * Limit registers have 8 bit resolution and match upper 8 bits of ADC
110 * registers.
111 */
112static inline int LIMIT_TO_MV(int limit, int range)
113{
114 return limit * range / 256;
115}
116
117static inline int MV_TO_LIMIT(unsigned long mv, int range)
118{
119 mv = clamp_val(mv, 0, ULONG_MAX / 256);
120 return DIV_ROUND_CLOSEST(clamp_val(mv * 256, 0, range * 255), range);
121}
122
123static inline int ADC_TO_CURR(int adc, int gain)
124{
125 return adc * 1400000 / (gain * 255);
126}
127
128/*
129 * max16065_read_adc()
130 *
131 * Read 16 bit value from <reg>, <reg+1>.
132 * Upper 8 bits are in <reg>, lower 2 bits are in bits 7:6 of <reg+1>.
133 */
134static int max16065_read_adc(struct i2c_client *client, int reg)
135{
136 int rv;
137
138 rv = i2c_smbus_read_word_swapped(client, reg);
139 if (unlikely(rv < 0))
140 return rv;
141 return rv >> 6;
142}
143
144static struct max16065_data *max16065_update_device(struct device *dev)
145{
146 struct max16065_data *data = dev_get_drvdata(dev);
147 struct i2c_client *client = data->client;
148
149 mutex_lock(&data->update_lock);
150 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
151 int i;
152
153 for (i = 0; i < data->num_adc; i++)
154 data->adc[i]
155 = max16065_read_adc(client, MAX16065_ADC(i));
156
157 if (data->have_current) {
158 data->adc[MAX16065_NUM_ADC]
159 = max16065_read_adc(client, MAX16065_CSP_ADC);
160 data->curr_sense
161 = i2c_smbus_read_byte_data(client,
162 MAX16065_CURR_SENSE);
163 }
164
165 for (i = 0; i < DIV_ROUND_UP(data->num_adc, 8); i++)
166 data->fault[i]
167 = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i));
168
169 data->last_updated = jiffies;
170 data->valid = 1;
171 }
172 mutex_unlock(&data->update_lock);
173 return data;
174}
175
176static ssize_t max16065_alarm_show(struct device *dev,
177 struct device_attribute *da, char *buf)
178{
179 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
180 struct max16065_data *data = max16065_update_device(dev);
181 int val = data->fault[attr2->nr];
182
183 if (val < 0)
184 return val;
185
186 val &= (1 << attr2->index);
187 if (val)
188 i2c_smbus_write_byte_data(data->client,
189 MAX16065_FAULT(attr2->nr), val);
190
191 return snprintf(buf, PAGE_SIZE, "%d\n", !!val);
192}
193
194static ssize_t max16065_input_show(struct device *dev,
195 struct device_attribute *da, char *buf)
196{
197 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
198 struct max16065_data *data = max16065_update_device(dev);
199 int adc = data->adc[attr->index];
200
201 if (unlikely(adc < 0))
202 return adc;
203
204 return snprintf(buf, PAGE_SIZE, "%d\n",
205 ADC_TO_MV(adc, data->range[attr->index]));
206}
207
208static ssize_t max16065_current_show(struct device *dev,
209 struct device_attribute *da, char *buf)
210{
211 struct max16065_data *data = max16065_update_device(dev);
212
213 if (unlikely(data->curr_sense < 0))
214 return data->curr_sense;
215
216 return snprintf(buf, PAGE_SIZE, "%d\n",
217 ADC_TO_CURR(data->curr_sense, data->curr_gain));
218}
219
220static ssize_t max16065_limit_store(struct device *dev,
221 struct device_attribute *da,
222 const char *buf, size_t count)
223{
224 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
225 struct max16065_data *data = dev_get_drvdata(dev);
226 unsigned long val;
227 int err;
228 int limit;
229
230 err = kstrtoul(buf, 10, &val);
231 if (unlikely(err < 0))
232 return err;
233
234 limit = MV_TO_LIMIT(val, data->range[attr2->index]);
235
236 mutex_lock(&data->update_lock);
237 data->limit[attr2->nr][attr2->index]
238 = LIMIT_TO_MV(limit, data->range[attr2->index]);
239 i2c_smbus_write_byte_data(data->client,
240 MAX16065_LIMIT(attr2->nr, attr2->index),
241 limit);
242 mutex_unlock(&data->update_lock);
243
244 return count;
245}
246
247static ssize_t max16065_limit_show(struct device *dev,
248 struct device_attribute *da, char *buf)
249{
250 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
251 struct max16065_data *data = dev_get_drvdata(dev);
252
253 return snprintf(buf, PAGE_SIZE, "%d\n",
254 data->limit[attr2->nr][attr2->index]);
255}
256
257/* Construct a sensor_device_attribute structure for each register */
258
259/* Input voltages */
260static SENSOR_DEVICE_ATTR_RO(in0_input, max16065_input, 0);
261static SENSOR_DEVICE_ATTR_RO(in1_input, max16065_input, 1);
262static SENSOR_DEVICE_ATTR_RO(in2_input, max16065_input, 2);
263static SENSOR_DEVICE_ATTR_RO(in3_input, max16065_input, 3);
264static SENSOR_DEVICE_ATTR_RO(in4_input, max16065_input, 4);
265static SENSOR_DEVICE_ATTR_RO(in5_input, max16065_input, 5);
266static SENSOR_DEVICE_ATTR_RO(in6_input, max16065_input, 6);
267static SENSOR_DEVICE_ATTR_RO(in7_input, max16065_input, 7);
268static SENSOR_DEVICE_ATTR_RO(in8_input, max16065_input, 8);
269static SENSOR_DEVICE_ATTR_RO(in9_input, max16065_input, 9);
270static SENSOR_DEVICE_ATTR_RO(in10_input, max16065_input, 10);
271static SENSOR_DEVICE_ATTR_RO(in11_input, max16065_input, 11);
272static SENSOR_DEVICE_ATTR_RO(in12_input, max16065_input, 12);
273
274/* Input voltages lcrit */
275static SENSOR_DEVICE_ATTR_2_RW(in0_lcrit, max16065_limit, 2, 0);
276static SENSOR_DEVICE_ATTR_2_RW(in1_lcrit, max16065_limit, 2, 1);
277static SENSOR_DEVICE_ATTR_2_RW(in2_lcrit, max16065_limit, 2, 2);
278static SENSOR_DEVICE_ATTR_2_RW(in3_lcrit, max16065_limit, 2, 3);
279static SENSOR_DEVICE_ATTR_2_RW(in4_lcrit, max16065_limit, 2, 4);
280static SENSOR_DEVICE_ATTR_2_RW(in5_lcrit, max16065_limit, 2, 5);
281static SENSOR_DEVICE_ATTR_2_RW(in6_lcrit, max16065_limit, 2, 6);
282static SENSOR_DEVICE_ATTR_2_RW(in7_lcrit, max16065_limit, 2, 7);
283static SENSOR_DEVICE_ATTR_2_RW(in8_lcrit, max16065_limit, 2, 8);
284static SENSOR_DEVICE_ATTR_2_RW(in9_lcrit, max16065_limit, 2, 9);
285static SENSOR_DEVICE_ATTR_2_RW(in10_lcrit, max16065_limit, 2, 10);
286static SENSOR_DEVICE_ATTR_2_RW(in11_lcrit, max16065_limit, 2, 11);
287
288/* Input voltages crit */
289static SENSOR_DEVICE_ATTR_2_RW(in0_crit, max16065_limit, 1, 0);
290static SENSOR_DEVICE_ATTR_2_RW(in1_crit, max16065_limit, 1, 1);
291static SENSOR_DEVICE_ATTR_2_RW(in2_crit, max16065_limit, 1, 2);
292static SENSOR_DEVICE_ATTR_2_RW(in3_crit, max16065_limit, 1, 3);
293static SENSOR_DEVICE_ATTR_2_RW(in4_crit, max16065_limit, 1, 4);
294static SENSOR_DEVICE_ATTR_2_RW(in5_crit, max16065_limit, 1, 5);
295static SENSOR_DEVICE_ATTR_2_RW(in6_crit, max16065_limit, 1, 6);
296static SENSOR_DEVICE_ATTR_2_RW(in7_crit, max16065_limit, 1, 7);
297static SENSOR_DEVICE_ATTR_2_RW(in8_crit, max16065_limit, 1, 8);
298static SENSOR_DEVICE_ATTR_2_RW(in9_crit, max16065_limit, 1, 9);
299static SENSOR_DEVICE_ATTR_2_RW(in10_crit, max16065_limit, 1, 10);
300static SENSOR_DEVICE_ATTR_2_RW(in11_crit, max16065_limit, 1, 11);
301
302/* Input voltages min */
303static SENSOR_DEVICE_ATTR_2_RW(in0_min, max16065_limit, 0, 0);
304static SENSOR_DEVICE_ATTR_2_RW(in1_min, max16065_limit, 0, 1);
305static SENSOR_DEVICE_ATTR_2_RW(in2_min, max16065_limit, 0, 2);
306static SENSOR_DEVICE_ATTR_2_RW(in3_min, max16065_limit, 0, 3);
307static SENSOR_DEVICE_ATTR_2_RW(in4_min, max16065_limit, 0, 4);
308static SENSOR_DEVICE_ATTR_2_RW(in5_min, max16065_limit, 0, 5);
309static SENSOR_DEVICE_ATTR_2_RW(in6_min, max16065_limit, 0, 6);
310static SENSOR_DEVICE_ATTR_2_RW(in7_min, max16065_limit, 0, 7);
311static SENSOR_DEVICE_ATTR_2_RW(in8_min, max16065_limit, 0, 8);
312static SENSOR_DEVICE_ATTR_2_RW(in9_min, max16065_limit, 0, 9);
313static SENSOR_DEVICE_ATTR_2_RW(in10_min, max16065_limit, 0, 10);
314static SENSOR_DEVICE_ATTR_2_RW(in11_min, max16065_limit, 0, 11);
315
316/* Input voltages max */
317static SENSOR_DEVICE_ATTR_2_RW(in0_max, max16065_limit, 0, 0);
318static SENSOR_DEVICE_ATTR_2_RW(in1_max, max16065_limit, 0, 1);
319static SENSOR_DEVICE_ATTR_2_RW(in2_max, max16065_limit, 0, 2);
320static SENSOR_DEVICE_ATTR_2_RW(in3_max, max16065_limit, 0, 3);
321static SENSOR_DEVICE_ATTR_2_RW(in4_max, max16065_limit, 0, 4);
322static SENSOR_DEVICE_ATTR_2_RW(in5_max, max16065_limit, 0, 5);
323static SENSOR_DEVICE_ATTR_2_RW(in6_max, max16065_limit, 0, 6);
324static SENSOR_DEVICE_ATTR_2_RW(in7_max, max16065_limit, 0, 7);
325static SENSOR_DEVICE_ATTR_2_RW(in8_max, max16065_limit, 0, 8);
326static SENSOR_DEVICE_ATTR_2_RW(in9_max, max16065_limit, 0, 9);
327static SENSOR_DEVICE_ATTR_2_RW(in10_max, max16065_limit, 0, 10);
328static SENSOR_DEVICE_ATTR_2_RW(in11_max, max16065_limit, 0, 11);
329
330/* alarms */
331static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, max16065_alarm, 0, 0);
332static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, max16065_alarm, 0, 1);
333static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, max16065_alarm, 0, 2);
334static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, max16065_alarm, 0, 3);
335static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, max16065_alarm, 0, 4);
336static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, max16065_alarm, 0, 5);
337static SENSOR_DEVICE_ATTR_2_RO(in6_alarm, max16065_alarm, 0, 6);
338static SENSOR_DEVICE_ATTR_2_RO(in7_alarm, max16065_alarm, 0, 7);
339static SENSOR_DEVICE_ATTR_2_RO(in8_alarm, max16065_alarm, 1, 0);
340static SENSOR_DEVICE_ATTR_2_RO(in9_alarm, max16065_alarm, 1, 1);
341static SENSOR_DEVICE_ATTR_2_RO(in10_alarm, max16065_alarm, 1, 2);
342static SENSOR_DEVICE_ATTR_2_RO(in11_alarm, max16065_alarm, 1, 3);
343
344/* Current and alarm */
345static SENSOR_DEVICE_ATTR_RO(curr1_input, max16065_current, 0);
346static SENSOR_DEVICE_ATTR_2_RO(curr1_alarm, max16065_alarm, 1, 4);
347
348/*
349 * Finally, construct an array of pointers to members of the above objects,
350 * as required for sysfs_create_group()
351 */
352static struct attribute *max16065_basic_attributes[] = {
353 &sensor_dev_attr_in0_input.dev_attr.attr,
354 &sensor_dev_attr_in0_lcrit.dev_attr.attr,
355 &sensor_dev_attr_in0_crit.dev_attr.attr,
356 &sensor_dev_attr_in0_alarm.dev_attr.attr,
357
358 &sensor_dev_attr_in1_input.dev_attr.attr,
359 &sensor_dev_attr_in1_lcrit.dev_attr.attr,
360 &sensor_dev_attr_in1_crit.dev_attr.attr,
361 &sensor_dev_attr_in1_alarm.dev_attr.attr,
362
363 &sensor_dev_attr_in2_input.dev_attr.attr,
364 &sensor_dev_attr_in2_lcrit.dev_attr.attr,
365 &sensor_dev_attr_in2_crit.dev_attr.attr,
366 &sensor_dev_attr_in2_alarm.dev_attr.attr,
367
368 &sensor_dev_attr_in3_input.dev_attr.attr,
369 &sensor_dev_attr_in3_lcrit.dev_attr.attr,
370 &sensor_dev_attr_in3_crit.dev_attr.attr,
371 &sensor_dev_attr_in3_alarm.dev_attr.attr,
372
373 &sensor_dev_attr_in4_input.dev_attr.attr,
374 &sensor_dev_attr_in4_lcrit.dev_attr.attr,
375 &sensor_dev_attr_in4_crit.dev_attr.attr,
376 &sensor_dev_attr_in4_alarm.dev_attr.attr,
377
378 &sensor_dev_attr_in5_input.dev_attr.attr,
379 &sensor_dev_attr_in5_lcrit.dev_attr.attr,
380 &sensor_dev_attr_in5_crit.dev_attr.attr,
381 &sensor_dev_attr_in5_alarm.dev_attr.attr,
382
383 &sensor_dev_attr_in6_input.dev_attr.attr,
384 &sensor_dev_attr_in6_lcrit.dev_attr.attr,
385 &sensor_dev_attr_in6_crit.dev_attr.attr,
386 &sensor_dev_attr_in6_alarm.dev_attr.attr,
387
388 &sensor_dev_attr_in7_input.dev_attr.attr,
389 &sensor_dev_attr_in7_lcrit.dev_attr.attr,
390 &sensor_dev_attr_in7_crit.dev_attr.attr,
391 &sensor_dev_attr_in7_alarm.dev_attr.attr,
392
393 &sensor_dev_attr_in8_input.dev_attr.attr,
394 &sensor_dev_attr_in8_lcrit.dev_attr.attr,
395 &sensor_dev_attr_in8_crit.dev_attr.attr,
396 &sensor_dev_attr_in8_alarm.dev_attr.attr,
397
398 &sensor_dev_attr_in9_input.dev_attr.attr,
399 &sensor_dev_attr_in9_lcrit.dev_attr.attr,
400 &sensor_dev_attr_in9_crit.dev_attr.attr,
401 &sensor_dev_attr_in9_alarm.dev_attr.attr,
402
403 &sensor_dev_attr_in10_input.dev_attr.attr,
404 &sensor_dev_attr_in10_lcrit.dev_attr.attr,
405 &sensor_dev_attr_in10_crit.dev_attr.attr,
406 &sensor_dev_attr_in10_alarm.dev_attr.attr,
407
408 &sensor_dev_attr_in11_input.dev_attr.attr,
409 &sensor_dev_attr_in11_lcrit.dev_attr.attr,
410 &sensor_dev_attr_in11_crit.dev_attr.attr,
411 &sensor_dev_attr_in11_alarm.dev_attr.attr,
412
413 NULL
414};
415
416static struct attribute *max16065_current_attributes[] = {
417 &sensor_dev_attr_in12_input.dev_attr.attr,
418 &sensor_dev_attr_curr1_input.dev_attr.attr,
419 &sensor_dev_attr_curr1_alarm.dev_attr.attr,
420 NULL
421};
422
423static struct attribute *max16065_min_attributes[] = {
424 &sensor_dev_attr_in0_min.dev_attr.attr,
425 &sensor_dev_attr_in1_min.dev_attr.attr,
426 &sensor_dev_attr_in2_min.dev_attr.attr,
427 &sensor_dev_attr_in3_min.dev_attr.attr,
428 &sensor_dev_attr_in4_min.dev_attr.attr,
429 &sensor_dev_attr_in5_min.dev_attr.attr,
430 &sensor_dev_attr_in6_min.dev_attr.attr,
431 &sensor_dev_attr_in7_min.dev_attr.attr,
432 &sensor_dev_attr_in8_min.dev_attr.attr,
433 &sensor_dev_attr_in9_min.dev_attr.attr,
434 &sensor_dev_attr_in10_min.dev_attr.attr,
435 &sensor_dev_attr_in11_min.dev_attr.attr,
436 NULL
437};
438
439static struct attribute *max16065_max_attributes[] = {
440 &sensor_dev_attr_in0_max.dev_attr.attr,
441 &sensor_dev_attr_in1_max.dev_attr.attr,
442 &sensor_dev_attr_in2_max.dev_attr.attr,
443 &sensor_dev_attr_in3_max.dev_attr.attr,
444 &sensor_dev_attr_in4_max.dev_attr.attr,
445 &sensor_dev_attr_in5_max.dev_attr.attr,
446 &sensor_dev_attr_in6_max.dev_attr.attr,
447 &sensor_dev_attr_in7_max.dev_attr.attr,
448 &sensor_dev_attr_in8_max.dev_attr.attr,
449 &sensor_dev_attr_in9_max.dev_attr.attr,
450 &sensor_dev_attr_in10_max.dev_attr.attr,
451 &sensor_dev_attr_in11_max.dev_attr.attr,
452 NULL
453};
454
455static umode_t max16065_basic_is_visible(struct kobject *kobj,
456 struct attribute *a, int n)
457{
458 struct device *dev = container_of(kobj, struct device, kobj);
459 struct max16065_data *data = dev_get_drvdata(dev);
460 int index = n / 4;
461
462 if (index >= data->num_adc || !data->range[index])
463 return 0;
464 return a->mode;
465}
466
467static umode_t max16065_secondary_is_visible(struct kobject *kobj,
468 struct attribute *a, int index)
469{
470 struct device *dev = container_of(kobj, struct device, kobj);
471 struct max16065_data *data = dev_get_drvdata(dev);
472
473 if (index >= data->num_adc)
474 return 0;
475 return a->mode;
476}
477
478static const struct attribute_group max16065_basic_group = {
479 .attrs = max16065_basic_attributes,
480 .is_visible = max16065_basic_is_visible,
481};
482
483static const struct attribute_group max16065_current_group = {
484 .attrs = max16065_current_attributes,
485};
486
487static const struct attribute_group max16065_min_group = {
488 .attrs = max16065_min_attributes,
489 .is_visible = max16065_secondary_is_visible,
490};
491
492static const struct attribute_group max16065_max_group = {
493 .attrs = max16065_max_attributes,
494 .is_visible = max16065_secondary_is_visible,
495};
496
497static int max16065_probe(struct i2c_client *client,
498 const struct i2c_device_id *id)
499{
500 struct i2c_adapter *adapter = client->adapter;
501 struct max16065_data *data;
502 struct device *dev = &client->dev;
503 struct device *hwmon_dev;
504 int i, j, val;
505 bool have_secondary; /* true if chip has secondary limits */
506 bool secondary_is_max = false; /* secondary limits reflect max */
507 int groups = 0;
508
509 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
510 | I2C_FUNC_SMBUS_READ_WORD_DATA))
511 return -ENODEV;
512
513 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
514 if (unlikely(!data))
515 return -ENOMEM;
516
517 data->client = client;
518 mutex_init(&data->update_lock);
519
520 data->num_adc = max16065_num_adc[id->driver_data];
521 data->have_current = max16065_have_current[id->driver_data];
522 have_secondary = max16065_have_secondary[id->driver_data];
523
524 if (have_secondary) {
525 val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE);
526 if (unlikely(val < 0))
527 return val;
528 secondary_is_max = val & MAX16065_WARNING_OV;
529 }
530
531 /* Read scale registers, convert to range */
532 for (i = 0; i < DIV_ROUND_UP(data->num_adc, 4); i++) {
533 val = i2c_smbus_read_byte_data(client, MAX16065_SCALE(i));
534 if (unlikely(val < 0))
535 return val;
536 for (j = 0; j < 4 && i * 4 + j < data->num_adc; j++) {
537 data->range[i * 4 + j] =
538 max16065_adc_range[(val >> (j * 2)) & 0x3];
539 }
540 }
541
542 /* Read limits */
543 for (i = 0; i < MAX16065_NUM_LIMIT; i++) {
544 if (i == 0 && !have_secondary)
545 continue;
546
547 for (j = 0; j < data->num_adc; j++) {
548 val = i2c_smbus_read_byte_data(client,
549 MAX16065_LIMIT(i, j));
550 if (unlikely(val < 0))
551 return val;
552 data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]);
553 }
554 }
555
556 /* sysfs hooks */
557 data->groups[groups++] = &max16065_basic_group;
558 if (have_secondary)
559 data->groups[groups++] = secondary_is_max ?
560 &max16065_max_group : &max16065_min_group;
561
562 if (data->have_current) {
563 val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL);
564 if (unlikely(val < 0))
565 return val;
566 if (val & MAX16065_CURR_ENABLE) {
567 /*
568 * Current gain is 6, 12, 24, 48 based on values in
569 * bit 2,3.
570 */
571 data->curr_gain = 6 << ((val >> 2) & 0x03);
572 data->range[MAX16065_NUM_ADC]
573 = max16065_csp_adc_range[(val >> 1) & 0x01];
574 data->groups[groups++] = &max16065_current_group;
575 } else {
576 data->have_current = false;
577 }
578 }
579
580 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
581 data, data->groups);
582 return PTR_ERR_OR_ZERO(hwmon_dev);
583}
584
585static const struct i2c_device_id max16065_id[] = {
586 { "max16065", max16065 },
587 { "max16066", max16066 },
588 { "max16067", max16067 },
589 { "max16068", max16068 },
590 { "max16070", max16070 },
591 { "max16071", max16071 },
592 { }
593};
594
595MODULE_DEVICE_TABLE(i2c, max16065_id);
596
597/* This is the driver that will be inserted */
598static struct i2c_driver max16065_driver = {
599 .driver = {
600 .name = "max16065",
601 },
602 .probe = max16065_probe,
603 .id_table = max16065_id,
604};
605
606module_i2c_driver(max16065_driver);
607
608MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
609MODULE_DESCRIPTION("MAX16065 driver");
610MODULE_LICENSE("GPL");