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sched/cputime: Add vtime guest task state
[linux-2.6-block.git] / drivers / hwmon / max16065.c
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b886d83c 1// SPDX-License-Identifier: GPL-2.0-only
f5bae264
GR		 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.
f5bae264
GR		 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>
f5bae264
GR		 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;
38c75dc3
GR		 83 struct i2c_client *client;
84 const struct attribute_group *groups[4];
f5bae264
GR		 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(int mv, int range)
118{
2a844c14 119 return clamp_val(DIV_ROUND_CLOSEST(mv * 256, range), 0, 255);
f5bae264
GR		 120}
121
122static inline int ADC_TO_CURR(int adc, int gain)
123{
ff71c182 124 return adc * 1400000 / (gain * 255);
f5bae264
GR		 125}
126
127/*
128 * max16065_read_adc()
129 *
130 * Read 16 bit value from <reg>, <reg+1>.
131 * Upper 8 bits are in <reg>, lower 2 bits are in bits 7:6 of <reg+1>.
132 */
133static int max16065_read_adc(struct i2c_client *client, int reg)
134{
135 int rv;
136
90f4102c 137 rv = i2c_smbus_read_word_swapped(client, reg);
f5bae264
GR		 138 if (unlikely(rv < 0))
139 return rv;
90f4102c 140 return rv >> 6;
f5bae264
GR		 141}
142
143static struct max16065_data *max16065_update_device(struct device *dev)
144{
38c75dc3
GR		 145 struct max16065_data *data = dev_get_drvdata(dev);
146 struct i2c_client *client = data->client;
f5bae264
GR		 147
148 mutex_lock(&data->update_lock);
149 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
150 int i;
151
152 for (i = 0; i < data->num_adc; i++)
153 data->adc[i]
154 = max16065_read_adc(client, MAX16065_ADC(i));
155
156 if (data->have_current) {
157 data->adc[MAX16065_NUM_ADC]
158 = max16065_read_adc(client, MAX16065_CSP_ADC);
159 data->curr_sense
160 = i2c_smbus_read_byte_data(client,
161 MAX16065_CURR_SENSE);
162 }
163
164 for (i = 0; i < DIV_ROUND_UP(data->num_adc, 8); i++)
165 data->fault[i]
166 = i2c_smbus_read_byte_data(client, MAX16065_FAULT(i));
167
168 data->last_updated = jiffies;
169 data->valid = 1;
170 }
171 mutex_unlock(&data->update_lock);
172 return data;
173}
174
9d6c1255 175static ssize_t max16065_alarm_show(struct device *dev,
f5bae264
GR		 176 struct device_attribute *da, char *buf)
177{
178 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
179 struct max16065_data *data = max16065_update_device(dev);
180 int val = data->fault[attr2->nr];
181
182 if (val < 0)
183 return val;
184
185 val &= (1 << attr2->index);
186 if (val)
38c75dc3 187 i2c_smbus_write_byte_data(data->client,
f5bae264
GR		 188 MAX16065_FAULT(attr2->nr), val);
189
190 return snprintf(buf, PAGE_SIZE, "%d\n", !!val);
191}
192
9d6c1255 193static ssize_t max16065_input_show(struct device *dev,
f5bae264
GR		 194 struct device_attribute *da, char *buf)
195{
196 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
197 struct max16065_data *data = max16065_update_device(dev);
198 int adc = data->adc[attr->index];
199
200 if (unlikely(adc < 0))
201 return adc;
202
203 return snprintf(buf, PAGE_SIZE, "%d\n",
204 ADC_TO_MV(adc, data->range[attr->index]));
205}
206
9d6c1255 207static ssize_t max16065_current_show(struct device *dev,
f5bae264
GR		 208 struct device_attribute *da, char *buf)
209{
210 struct max16065_data *data = max16065_update_device(dev);
211
212 if (unlikely(data->curr_sense < 0))
213 return data->curr_sense;
214
215 return snprintf(buf, PAGE_SIZE, "%d\n",
216 ADC_TO_CURR(data->curr_sense, data->curr_gain));
217}
218
9d6c1255
GR		 219static ssize_t max16065_limit_store(struct device *dev,
220 struct device_attribute *da,
221 const char *buf, size_t count)
f5bae264
GR		 222{
223 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
38c75dc3 224 struct max16065_data *data = dev_get_drvdata(dev);
f5bae264
GR		 225 unsigned long val;
226 int err;
227 int limit;
228
179c4fdb 229 err = kstrtoul(buf, 10, &val);
f5bae264
GR		 230 if (unlikely(err < 0))
231 return err;
232
233 limit = MV_TO_LIMIT(val, data->range[attr2->index]);
234
235 mutex_lock(&data->update_lock);
236 data->limit[attr2->nr][attr2->index]
237 = LIMIT_TO_MV(limit, data->range[attr2->index]);
38c75dc3 238 i2c_smbus_write_byte_data(data->client,
f5bae264
GR		 239 MAX16065_LIMIT(attr2->nr, attr2->index),
240 limit);
241 mutex_unlock(&data->update_lock);
242
243 return count;
244}
245
9d6c1255 246static ssize_t max16065_limit_show(struct device *dev,
f5bae264
GR		 247 struct device_attribute *da, char *buf)
248{
249 struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(da);
38c75dc3 250 struct max16065_data *data = dev_get_drvdata(dev);
f5bae264
GR		 251
252 return snprintf(buf, PAGE_SIZE, "%d\n",
253 data->limit[attr2->nr][attr2->index]);
254}
255
256/* Construct a sensor_device_attribute structure for each register */
257
258/* Input voltages */
9d6c1255
GR		 259static SENSOR_DEVICE_ATTR_RO(in0_input, max16065_input, 0);
260static SENSOR_DEVICE_ATTR_RO(in1_input, max16065_input, 1);
261static SENSOR_DEVICE_ATTR_RO(in2_input, max16065_input, 2);
262static SENSOR_DEVICE_ATTR_RO(in3_input, max16065_input, 3);
263static SENSOR_DEVICE_ATTR_RO(in4_input, max16065_input, 4);
264static SENSOR_DEVICE_ATTR_RO(in5_input, max16065_input, 5);
265static SENSOR_DEVICE_ATTR_RO(in6_input, max16065_input, 6);
266static SENSOR_DEVICE_ATTR_RO(in7_input, max16065_input, 7);
267static SENSOR_DEVICE_ATTR_RO(in8_input, max16065_input, 8);
268static SENSOR_DEVICE_ATTR_RO(in9_input, max16065_input, 9);
269static SENSOR_DEVICE_ATTR_RO(in10_input, max16065_input, 10);
270static SENSOR_DEVICE_ATTR_RO(in11_input, max16065_input, 11);
271static SENSOR_DEVICE_ATTR_RO(in12_input, max16065_input, 12);
f5bae264
GR		 272
273/* Input voltages lcrit */
9d6c1255
GR		 274static SENSOR_DEVICE_ATTR_2_RW(in0_lcrit, max16065_limit, 2, 0);
275static SENSOR_DEVICE_ATTR_2_RW(in1_lcrit, max16065_limit, 2, 1);
276static SENSOR_DEVICE_ATTR_2_RW(in2_lcrit, max16065_limit, 2, 2);
277static SENSOR_DEVICE_ATTR_2_RW(in3_lcrit, max16065_limit, 2, 3);
278static SENSOR_DEVICE_ATTR_2_RW(in4_lcrit, max16065_limit, 2, 4);
279static SENSOR_DEVICE_ATTR_2_RW(in5_lcrit, max16065_limit, 2, 5);
280static SENSOR_DEVICE_ATTR_2_RW(in6_lcrit, max16065_limit, 2, 6);
281static SENSOR_DEVICE_ATTR_2_RW(in7_lcrit, max16065_limit, 2, 7);
282static SENSOR_DEVICE_ATTR_2_RW(in8_lcrit, max16065_limit, 2, 8);
283static SENSOR_DEVICE_ATTR_2_RW(in9_lcrit, max16065_limit, 2, 9);
284static SENSOR_DEVICE_ATTR_2_RW(in10_lcrit, max16065_limit, 2, 10);
285static SENSOR_DEVICE_ATTR_2_RW(in11_lcrit, max16065_limit, 2, 11);
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GR		 286
287/* Input voltages crit */
9d6c1255
GR		 288static SENSOR_DEVICE_ATTR_2_RW(in0_crit, max16065_limit, 1, 0);
289static SENSOR_DEVICE_ATTR_2_RW(in1_crit, max16065_limit, 1, 1);
290static SENSOR_DEVICE_ATTR_2_RW(in2_crit, max16065_limit, 1, 2);
291static SENSOR_DEVICE_ATTR_2_RW(in3_crit, max16065_limit, 1, 3);
292static SENSOR_DEVICE_ATTR_2_RW(in4_crit, max16065_limit, 1, 4);
293static SENSOR_DEVICE_ATTR_2_RW(in5_crit, max16065_limit, 1, 5);
294static SENSOR_DEVICE_ATTR_2_RW(in6_crit, max16065_limit, 1, 6);
295static SENSOR_DEVICE_ATTR_2_RW(in7_crit, max16065_limit, 1, 7);
296static SENSOR_DEVICE_ATTR_2_RW(in8_crit, max16065_limit, 1, 8);
297static SENSOR_DEVICE_ATTR_2_RW(in9_crit, max16065_limit, 1, 9);
298static SENSOR_DEVICE_ATTR_2_RW(in10_crit, max16065_limit, 1, 10);
299static SENSOR_DEVICE_ATTR_2_RW(in11_crit, max16065_limit, 1, 11);
f5bae264
GR		 300
301/* Input voltages min */
9d6c1255
GR		 302static SENSOR_DEVICE_ATTR_2_RW(in0_min, max16065_limit, 0, 0);
303static SENSOR_DEVICE_ATTR_2_RW(in1_min, max16065_limit, 0, 1);
304static SENSOR_DEVICE_ATTR_2_RW(in2_min, max16065_limit, 0, 2);
305static SENSOR_DEVICE_ATTR_2_RW(in3_min, max16065_limit, 0, 3);
306static SENSOR_DEVICE_ATTR_2_RW(in4_min, max16065_limit, 0, 4);
307static SENSOR_DEVICE_ATTR_2_RW(in5_min, max16065_limit, 0, 5);
308static SENSOR_DEVICE_ATTR_2_RW(in6_min, max16065_limit, 0, 6);
309static SENSOR_DEVICE_ATTR_2_RW(in7_min, max16065_limit, 0, 7);
310static SENSOR_DEVICE_ATTR_2_RW(in8_min, max16065_limit, 0, 8);
311static SENSOR_DEVICE_ATTR_2_RW(in9_min, max16065_limit, 0, 9);
312static SENSOR_DEVICE_ATTR_2_RW(in10_min, max16065_limit, 0, 10);
313static SENSOR_DEVICE_ATTR_2_RW(in11_min, max16065_limit, 0, 11);
f5bae264
GR		 314
315/* Input voltages max */
9d6c1255
GR		 316static SENSOR_DEVICE_ATTR_2_RW(in0_max, max16065_limit, 0, 0);
317static SENSOR_DEVICE_ATTR_2_RW(in1_max, max16065_limit, 0, 1);
318static SENSOR_DEVICE_ATTR_2_RW(in2_max, max16065_limit, 0, 2);
319static SENSOR_DEVICE_ATTR_2_RW(in3_max, max16065_limit, 0, 3);
320static SENSOR_DEVICE_ATTR_2_RW(in4_max, max16065_limit, 0, 4);
321static SENSOR_DEVICE_ATTR_2_RW(in5_max, max16065_limit, 0, 5);
322static SENSOR_DEVICE_ATTR_2_RW(in6_max, max16065_limit, 0, 6);
323static SENSOR_DEVICE_ATTR_2_RW(in7_max, max16065_limit, 0, 7);
324static SENSOR_DEVICE_ATTR_2_RW(in8_max, max16065_limit, 0, 8);
325static SENSOR_DEVICE_ATTR_2_RW(in9_max, max16065_limit, 0, 9);
326static SENSOR_DEVICE_ATTR_2_RW(in10_max, max16065_limit, 0, 10);
327static SENSOR_DEVICE_ATTR_2_RW(in11_max, max16065_limit, 0, 11);
f5bae264
GR		 328
329/* alarms */
9d6c1255
GR		 330static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, max16065_alarm, 0, 0);
331static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, max16065_alarm, 0, 1);
332static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, max16065_alarm, 0, 2);
333static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, max16065_alarm, 0, 3);
334static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, max16065_alarm, 0, 4);
335static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, max16065_alarm, 0, 5);
336static SENSOR_DEVICE_ATTR_2_RO(in6_alarm, max16065_alarm, 0, 6);
337static SENSOR_DEVICE_ATTR_2_RO(in7_alarm, max16065_alarm, 0, 7);
338static SENSOR_DEVICE_ATTR_2_RO(in8_alarm, max16065_alarm, 1, 0);
339static SENSOR_DEVICE_ATTR_2_RO(in9_alarm, max16065_alarm, 1, 1);
340static SENSOR_DEVICE_ATTR_2_RO(in10_alarm, max16065_alarm, 1, 2);
341static SENSOR_DEVICE_ATTR_2_RO(in11_alarm, max16065_alarm, 1, 3);
f5bae264
GR		 342
343/* Current and alarm */
9d6c1255
GR		 344static SENSOR_DEVICE_ATTR_RO(curr1_input, max16065_current, 0);
345static SENSOR_DEVICE_ATTR_2_RO(curr1_alarm, max16065_alarm, 1, 4);
f5bae264
GR		 346
347/*
348 * Finally, construct an array of pointers to members of the above objects,
349 * as required for sysfs_create_group()
350 */
351static struct attribute *max16065_basic_attributes[] = {
352 &sensor_dev_attr_in0_input.dev_attr.attr,
353 &sensor_dev_attr_in0_lcrit.dev_attr.attr,
354 &sensor_dev_attr_in0_crit.dev_attr.attr,
355 &sensor_dev_attr_in0_alarm.dev_attr.attr,
356
357 &sensor_dev_attr_in1_input.dev_attr.attr,
358 &sensor_dev_attr_in1_lcrit.dev_attr.attr,
359 &sensor_dev_attr_in1_crit.dev_attr.attr,
360 &sensor_dev_attr_in1_alarm.dev_attr.attr,
361
362 &sensor_dev_attr_in2_input.dev_attr.attr,
363 &sensor_dev_attr_in2_lcrit.dev_attr.attr,
364 &sensor_dev_attr_in2_crit.dev_attr.attr,
365 &sensor_dev_attr_in2_alarm.dev_attr.attr,
366
367 &sensor_dev_attr_in3_input.dev_attr.attr,
368 &sensor_dev_attr_in3_lcrit.dev_attr.attr,
369 &sensor_dev_attr_in3_crit.dev_attr.attr,
370 &sensor_dev_attr_in3_alarm.dev_attr.attr,
371
372 &sensor_dev_attr_in4_input.dev_attr.attr,
373 &sensor_dev_attr_in4_lcrit.dev_attr.attr,
374 &sensor_dev_attr_in4_crit.dev_attr.attr,
375 &sensor_dev_attr_in4_alarm.dev_attr.attr,
376
377 &sensor_dev_attr_in5_input.dev_attr.attr,
378 &sensor_dev_attr_in5_lcrit.dev_attr.attr,
379 &sensor_dev_attr_in5_crit.dev_attr.attr,
380 &sensor_dev_attr_in5_alarm.dev_attr.attr,
381
382 &sensor_dev_attr_in6_input.dev_attr.attr,
383 &sensor_dev_attr_in6_lcrit.dev_attr.attr,
384 &sensor_dev_attr_in6_crit.dev_attr.attr,
385 &sensor_dev_attr_in6_alarm.dev_attr.attr,
386
387 &sensor_dev_attr_in7_input.dev_attr.attr,
388 &sensor_dev_attr_in7_lcrit.dev_attr.attr,
389 &sensor_dev_attr_in7_crit.dev_attr.attr,
390 &sensor_dev_attr_in7_alarm.dev_attr.attr,
391
392 &sensor_dev_attr_in8_input.dev_attr.attr,
393 &sensor_dev_attr_in8_lcrit.dev_attr.attr,
394 &sensor_dev_attr_in8_crit.dev_attr.attr,
395 &sensor_dev_attr_in8_alarm.dev_attr.attr,
396
397 &sensor_dev_attr_in9_input.dev_attr.attr,
398 &sensor_dev_attr_in9_lcrit.dev_attr.attr,
399 &sensor_dev_attr_in9_crit.dev_attr.attr,
400 &sensor_dev_attr_in9_alarm.dev_attr.attr,
401
402 &sensor_dev_attr_in10_input.dev_attr.attr,
403 &sensor_dev_attr_in10_lcrit.dev_attr.attr,
404 &sensor_dev_attr_in10_crit.dev_attr.attr,
405 &sensor_dev_attr_in10_alarm.dev_attr.attr,
406
407 &sensor_dev_attr_in11_input.dev_attr.attr,
408 &sensor_dev_attr_in11_lcrit.dev_attr.attr,
409 &sensor_dev_attr_in11_crit.dev_attr.attr,
410 &sensor_dev_attr_in11_alarm.dev_attr.attr,
411
412 NULL
413};
414
415static struct attribute *max16065_current_attributes[] = {
416 &sensor_dev_attr_in12_input.dev_attr.attr,
417 &sensor_dev_attr_curr1_input.dev_attr.attr,
418 &sensor_dev_attr_curr1_alarm.dev_attr.attr,
419 NULL
420};
421
422static struct attribute *max16065_min_attributes[] = {
423 &sensor_dev_attr_in0_min.dev_attr.attr,
424 &sensor_dev_attr_in1_min.dev_attr.attr,
425 &sensor_dev_attr_in2_min.dev_attr.attr,
426 &sensor_dev_attr_in3_min.dev_attr.attr,
427 &sensor_dev_attr_in4_min.dev_attr.attr,
428 &sensor_dev_attr_in5_min.dev_attr.attr,
429 &sensor_dev_attr_in6_min.dev_attr.attr,
430 &sensor_dev_attr_in7_min.dev_attr.attr,
431 &sensor_dev_attr_in8_min.dev_attr.attr,
432 &sensor_dev_attr_in9_min.dev_attr.attr,
433 &sensor_dev_attr_in10_min.dev_attr.attr,
434 &sensor_dev_attr_in11_min.dev_attr.attr,
435 NULL
436};
437
438static struct attribute *max16065_max_attributes[] = {
439 &sensor_dev_attr_in0_max.dev_attr.attr,
440 &sensor_dev_attr_in1_max.dev_attr.attr,
441 &sensor_dev_attr_in2_max.dev_attr.attr,
442 &sensor_dev_attr_in3_max.dev_attr.attr,
443 &sensor_dev_attr_in4_max.dev_attr.attr,
444 &sensor_dev_attr_in5_max.dev_attr.attr,
445 &sensor_dev_attr_in6_max.dev_attr.attr,
446 &sensor_dev_attr_in7_max.dev_attr.attr,
447 &sensor_dev_attr_in8_max.dev_attr.attr,
448 &sensor_dev_attr_in9_max.dev_attr.attr,
449 &sensor_dev_attr_in10_max.dev_attr.attr,
450 &sensor_dev_attr_in11_max.dev_attr.attr,
451 NULL
452};
453
38c75dc3
GR		 454static umode_t max16065_basic_is_visible(struct kobject *kobj,
455 struct attribute *a, int n)
456{
457 struct device *dev = container_of(kobj, struct device, kobj);
458 struct max16065_data *data = dev_get_drvdata(dev);
459 int index = n / 4;
460
461 if (index >= data->num_adc || !data->range[index])
462 return 0;
463 return a->mode;
464}
465
466static umode_t max16065_secondary_is_visible(struct kobject *kobj,
467 struct attribute *a, int index)
468{
469 struct device *dev = container_of(kobj, struct device, kobj);
470 struct max16065_data *data = dev_get_drvdata(dev);
471
472 if (index >= data->num_adc)
473 return 0;
474 return a->mode;
475}
476
f5bae264
GR		 477static const struct attribute_group max16065_basic_group = {
478 .attrs = max16065_basic_attributes,
38c75dc3 479 .is_visible = max16065_basic_is_visible,
f5bae264
GR		 480};
481
482static const struct attribute_group max16065_current_group = {
483 .attrs = max16065_current_attributes,
484};
485
486static const struct attribute_group max16065_min_group = {
487 .attrs = max16065_min_attributes,
38c75dc3 488 .is_visible = max16065_secondary_is_visible,
f5bae264
GR		 489};
490
491static const struct attribute_group max16065_max_group = {
492 .attrs = max16065_max_attributes,
38c75dc3 493 .is_visible = max16065_secondary_is_visible,
f5bae264
GR		 494};
495
f5bae264
GR		 496static int max16065_probe(struct i2c_client *client,
497 const struct i2c_device_id *id)
498{
499 struct i2c_adapter *adapter = client->adapter;
500 struct max16065_data *data;
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GR		 501 struct device *dev = &client->dev;
502 struct device *hwmon_dev;
503 int i, j, val;
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GR		 504 bool have_secondary; /* true if chip has secondary limits */
505 bool secondary_is_max = false; /* secondary limits reflect max */
38c75dc3 506 int groups = 0;
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GR		 507
508 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
509 | I2C_FUNC_SMBUS_READ_WORD_DATA))
510 return -ENODEV;
511
38c75dc3 512 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
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GR		 513 if (unlikely(!data))
514 return -ENOMEM;
515
38c75dc3 516 data->client = client;
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GR		 517 mutex_init(&data->update_lock);
518
519 data->num_adc = max16065_num_adc[id->driver_data];
520 data->have_current = max16065_have_current[id->driver_data];
521 have_secondary = max16065_have_secondary[id->driver_data];
522
523 if (have_secondary) {
524 val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE);
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GR		 525 if (unlikely(val < 0))
526 return val;
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GR		 527 secondary_is_max = val & MAX16065_WARNING_OV;
528 }
529
530 /* Read scale registers, convert to range */
531 for (i = 0; i < DIV_ROUND_UP(data->num_adc, 4); i++) {
532 val = i2c_smbus_read_byte_data(client, MAX16065_SCALE(i));
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GR		 533 if (unlikely(val < 0))
534 return val;
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GR		 535 for (j = 0; j < 4 && i * 4 + j < data->num_adc; j++) {
536 data->range[i * 4 + j] =
537 max16065_adc_range[(val >> (j * 2)) & 0x3];
538 }
539 }
540
541 /* Read limits */
542 for (i = 0; i < MAX16065_NUM_LIMIT; i++) {
543 if (i == 0 && !have_secondary)
544 continue;
545
546 for (j = 0; j < data->num_adc; j++) {
547 val = i2c_smbus_read_byte_data(client,
548 MAX16065_LIMIT(i, j));
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GR		 549 if (unlikely(val < 0))
550 return val;
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GR		 551 data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]);
552 }
553 }
554
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GR		 555 /* sysfs hooks */
556 data->groups[groups++] = &max16065_basic_group;
557 if (have_secondary)
558 data->groups[groups++] = secondary_is_max ?
559 &max16065_max_group : &max16065_min_group;
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GR		 560
561 if (data->have_current) {
562 val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL);
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GR		 563 if (unlikely(val < 0))
564 return val;
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GR		 565 if (val & MAX16065_CURR_ENABLE) {
566 /*
567 * Current gain is 6, 12, 24, 48 based on values in
568 * bit 2,3.
569 */
570 data->curr_gain = 6 << ((val >> 2) & 0x03);
571 data->range[MAX16065_NUM_ADC]
572 = max16065_csp_adc_range[(val >> 1) & 0x01];
38c75dc3 573 data->groups[groups++] = &max16065_current_group;
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GR		 574 } else {
575 data->have_current = false;
576 }
577 }
578
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GR		 579 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
580 data, data->groups);
a7b30ea5 581 return PTR_ERR_OR_ZERO(hwmon_dev);
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GR		 582}
583
584static const struct i2c_device_id max16065_id[] = {
585 { "max16065", max16065 },
586 { "max16066", max16066 },
587 { "max16067", max16067 },
588 { "max16068", max16068 },
589 { "max16070", max16070 },
590 { "max16071", max16071 },
591 { }
592};
593
594MODULE_DEVICE_TABLE(i2c, max16065_id);
595
596/* This is the driver that will be inserted */
597static struct i2c_driver max16065_driver = {
598 .driver = {
599 .name = "max16065",
600 },
601 .probe = max16065_probe,
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GR		 602 .id_table = max16065_id,
603};
604
f0967eea 605module_i2c_driver(max16065_driver);
f5bae264 606
bb9a80e5 607MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
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GR		 608MODULE_DESCRIPTION("MAX16065 driver");
609MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)