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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 | ||
24 | enum 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 | ||
54 | static 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 | ||
63 | static 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 | ||
72 | static 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 | ||
81 | struct 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 | ||
99 | static const int max16065_adc_range[] = { 5560, 2780, 1390, 0 }; | |
100 | static const int max16065_csp_adc_range[] = { 7000, 14000 }; | |
101 | ||
102 | /* ADC registers have 10 bit resolution. */ | |
103 | static 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 | */ | |
112 | static inline int LIMIT_TO_MV(int limit, int range) | |
113 | { | |
114 | return limit * range / 256; | |
115 | } | |
116 | ||
117 | static 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 | ||
122 | static 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 | */ | |
133 | static 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 | ||
143 | static 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 | 175 | static 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 | 193 | static 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 | 207 | static 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 |
219 | static 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 | 246 | static 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 |
259 | static SENSOR_DEVICE_ATTR_RO(in0_input, max16065_input, 0); |
260 | static SENSOR_DEVICE_ATTR_RO(in1_input, max16065_input, 1); | |
261 | static SENSOR_DEVICE_ATTR_RO(in2_input, max16065_input, 2); | |
262 | static SENSOR_DEVICE_ATTR_RO(in3_input, max16065_input, 3); | |
263 | static SENSOR_DEVICE_ATTR_RO(in4_input, max16065_input, 4); | |
264 | static SENSOR_DEVICE_ATTR_RO(in5_input, max16065_input, 5); | |
265 | static SENSOR_DEVICE_ATTR_RO(in6_input, max16065_input, 6); | |
266 | static SENSOR_DEVICE_ATTR_RO(in7_input, max16065_input, 7); | |
267 | static SENSOR_DEVICE_ATTR_RO(in8_input, max16065_input, 8); | |
268 | static SENSOR_DEVICE_ATTR_RO(in9_input, max16065_input, 9); | |
269 | static SENSOR_DEVICE_ATTR_RO(in10_input, max16065_input, 10); | |
270 | static SENSOR_DEVICE_ATTR_RO(in11_input, max16065_input, 11); | |
271 | static SENSOR_DEVICE_ATTR_RO(in12_input, max16065_input, 12); | |
f5bae264 GR |
272 | |
273 | /* Input voltages lcrit */ | |
9d6c1255 GR |
274 | static SENSOR_DEVICE_ATTR_2_RW(in0_lcrit, max16065_limit, 2, 0); |
275 | static SENSOR_DEVICE_ATTR_2_RW(in1_lcrit, max16065_limit, 2, 1); | |
276 | static SENSOR_DEVICE_ATTR_2_RW(in2_lcrit, max16065_limit, 2, 2); | |
277 | static SENSOR_DEVICE_ATTR_2_RW(in3_lcrit, max16065_limit, 2, 3); | |
278 | static SENSOR_DEVICE_ATTR_2_RW(in4_lcrit, max16065_limit, 2, 4); | |
279 | static SENSOR_DEVICE_ATTR_2_RW(in5_lcrit, max16065_limit, 2, 5); | |
280 | static SENSOR_DEVICE_ATTR_2_RW(in6_lcrit, max16065_limit, 2, 6); | |
281 | static SENSOR_DEVICE_ATTR_2_RW(in7_lcrit, max16065_limit, 2, 7); | |
282 | static SENSOR_DEVICE_ATTR_2_RW(in8_lcrit, max16065_limit, 2, 8); | |
283 | static SENSOR_DEVICE_ATTR_2_RW(in9_lcrit, max16065_limit, 2, 9); | |
284 | static SENSOR_DEVICE_ATTR_2_RW(in10_lcrit, max16065_limit, 2, 10); | |
285 | static SENSOR_DEVICE_ATTR_2_RW(in11_lcrit, max16065_limit, 2, 11); | |
f5bae264 GR |
286 | |
287 | /* Input voltages crit */ | |
9d6c1255 GR |
288 | static SENSOR_DEVICE_ATTR_2_RW(in0_crit, max16065_limit, 1, 0); |
289 | static SENSOR_DEVICE_ATTR_2_RW(in1_crit, max16065_limit, 1, 1); | |
290 | static SENSOR_DEVICE_ATTR_2_RW(in2_crit, max16065_limit, 1, 2); | |
291 | static SENSOR_DEVICE_ATTR_2_RW(in3_crit, max16065_limit, 1, 3); | |
292 | static SENSOR_DEVICE_ATTR_2_RW(in4_crit, max16065_limit, 1, 4); | |
293 | static SENSOR_DEVICE_ATTR_2_RW(in5_crit, max16065_limit, 1, 5); | |
294 | static SENSOR_DEVICE_ATTR_2_RW(in6_crit, max16065_limit, 1, 6); | |
295 | static SENSOR_DEVICE_ATTR_2_RW(in7_crit, max16065_limit, 1, 7); | |
296 | static SENSOR_DEVICE_ATTR_2_RW(in8_crit, max16065_limit, 1, 8); | |
297 | static SENSOR_DEVICE_ATTR_2_RW(in9_crit, max16065_limit, 1, 9); | |
298 | static SENSOR_DEVICE_ATTR_2_RW(in10_crit, max16065_limit, 1, 10); | |
299 | static SENSOR_DEVICE_ATTR_2_RW(in11_crit, max16065_limit, 1, 11); | |
f5bae264 GR |
300 | |
301 | /* Input voltages min */ | |
9d6c1255 GR |
302 | static SENSOR_DEVICE_ATTR_2_RW(in0_min, max16065_limit, 0, 0); |
303 | static SENSOR_DEVICE_ATTR_2_RW(in1_min, max16065_limit, 0, 1); | |
304 | static SENSOR_DEVICE_ATTR_2_RW(in2_min, max16065_limit, 0, 2); | |
305 | static SENSOR_DEVICE_ATTR_2_RW(in3_min, max16065_limit, 0, 3); | |
306 | static SENSOR_DEVICE_ATTR_2_RW(in4_min, max16065_limit, 0, 4); | |
307 | static SENSOR_DEVICE_ATTR_2_RW(in5_min, max16065_limit, 0, 5); | |
308 | static SENSOR_DEVICE_ATTR_2_RW(in6_min, max16065_limit, 0, 6); | |
309 | static SENSOR_DEVICE_ATTR_2_RW(in7_min, max16065_limit, 0, 7); | |
310 | static SENSOR_DEVICE_ATTR_2_RW(in8_min, max16065_limit, 0, 8); | |
311 | static SENSOR_DEVICE_ATTR_2_RW(in9_min, max16065_limit, 0, 9); | |
312 | static SENSOR_DEVICE_ATTR_2_RW(in10_min, max16065_limit, 0, 10); | |
313 | static SENSOR_DEVICE_ATTR_2_RW(in11_min, max16065_limit, 0, 11); | |
f5bae264 GR |
314 | |
315 | /* Input voltages max */ | |
9d6c1255 GR |
316 | static SENSOR_DEVICE_ATTR_2_RW(in0_max, max16065_limit, 0, 0); |
317 | static SENSOR_DEVICE_ATTR_2_RW(in1_max, max16065_limit, 0, 1); | |
318 | static SENSOR_DEVICE_ATTR_2_RW(in2_max, max16065_limit, 0, 2); | |
319 | static SENSOR_DEVICE_ATTR_2_RW(in3_max, max16065_limit, 0, 3); | |
320 | static SENSOR_DEVICE_ATTR_2_RW(in4_max, max16065_limit, 0, 4); | |
321 | static SENSOR_DEVICE_ATTR_2_RW(in5_max, max16065_limit, 0, 5); | |
322 | static SENSOR_DEVICE_ATTR_2_RW(in6_max, max16065_limit, 0, 6); | |
323 | static SENSOR_DEVICE_ATTR_2_RW(in7_max, max16065_limit, 0, 7); | |
324 | static SENSOR_DEVICE_ATTR_2_RW(in8_max, max16065_limit, 0, 8); | |
325 | static SENSOR_DEVICE_ATTR_2_RW(in9_max, max16065_limit, 0, 9); | |
326 | static SENSOR_DEVICE_ATTR_2_RW(in10_max, max16065_limit, 0, 10); | |
327 | static SENSOR_DEVICE_ATTR_2_RW(in11_max, max16065_limit, 0, 11); | |
f5bae264 GR |
328 | |
329 | /* alarms */ | |
9d6c1255 GR |
330 | static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, max16065_alarm, 0, 0); |
331 | static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, max16065_alarm, 0, 1); | |
332 | static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, max16065_alarm, 0, 2); | |
333 | static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, max16065_alarm, 0, 3); | |
334 | static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, max16065_alarm, 0, 4); | |
335 | static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, max16065_alarm, 0, 5); | |
336 | static SENSOR_DEVICE_ATTR_2_RO(in6_alarm, max16065_alarm, 0, 6); | |
337 | static SENSOR_DEVICE_ATTR_2_RO(in7_alarm, max16065_alarm, 0, 7); | |
338 | static SENSOR_DEVICE_ATTR_2_RO(in8_alarm, max16065_alarm, 1, 0); | |
339 | static SENSOR_DEVICE_ATTR_2_RO(in9_alarm, max16065_alarm, 1, 1); | |
340 | static SENSOR_DEVICE_ATTR_2_RO(in10_alarm, max16065_alarm, 1, 2); | |
341 | static SENSOR_DEVICE_ATTR_2_RO(in11_alarm, max16065_alarm, 1, 3); | |
f5bae264 GR |
342 | |
343 | /* Current and alarm */ | |
9d6c1255 GR |
344 | static SENSOR_DEVICE_ATTR_RO(curr1_input, max16065_current, 0); |
345 | static 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 | */ | |
351 | static 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 | ||
415 | static 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 | ||
422 | static 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 | ||
438 | static 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 |
454 | static 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 | ||
466 | static 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 |
477 | static const struct attribute_group max16065_basic_group = { |
478 | .attrs = max16065_basic_attributes, | |
38c75dc3 | 479 | .is_visible = max16065_basic_is_visible, |
f5bae264 GR |
480 | }; |
481 | ||
482 | static const struct attribute_group max16065_current_group = { | |
483 | .attrs = max16065_current_attributes, | |
484 | }; | |
485 | ||
486 | static const struct attribute_group max16065_min_group = { | |
487 | .attrs = max16065_min_attributes, | |
38c75dc3 | 488 | .is_visible = max16065_secondary_is_visible, |
f5bae264 GR |
489 | }; |
490 | ||
491 | static const struct attribute_group max16065_max_group = { | |
492 | .attrs = max16065_max_attributes, | |
38c75dc3 | 493 | .is_visible = max16065_secondary_is_visible, |
f5bae264 GR |
494 | }; |
495 | ||
67487038 SK |
496 | static const struct i2c_device_id max16065_id[]; |
497 | ||
498 | static int max16065_probe(struct i2c_client *client) | |
f5bae264 GR |
499 | { |
500 | struct i2c_adapter *adapter = client->adapter; | |
501 | struct max16065_data *data; | |
38c75dc3 GR |
502 | struct device *dev = &client->dev; |
503 | struct device *hwmon_dev; | |
504 | int i, j, val; | |
f5bae264 GR |
505 | bool have_secondary; /* true if chip has secondary limits */ |
506 | bool secondary_is_max = false; /* secondary limits reflect max */ | |
38c75dc3 | 507 | int groups = 0; |
67487038 | 508 | const struct i2c_device_id *id = i2c_match_id(max16065_id, client); |
f5bae264 GR |
509 | |
510 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | |
511 | | I2C_FUNC_SMBUS_READ_WORD_DATA)) | |
512 | return -ENODEV; | |
513 | ||
38c75dc3 | 514 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
f5bae264 GR |
515 | if (unlikely(!data)) |
516 | return -ENOMEM; | |
517 | ||
38c75dc3 | 518 | data->client = client; |
f5bae264 GR |
519 | mutex_init(&data->update_lock); |
520 | ||
521 | data->num_adc = max16065_num_adc[id->driver_data]; | |
522 | data->have_current = max16065_have_current[id->driver_data]; | |
523 | have_secondary = max16065_have_secondary[id->driver_data]; | |
524 | ||
525 | if (have_secondary) { | |
526 | val = i2c_smbus_read_byte_data(client, MAX16065_SW_ENABLE); | |
918ddef3 GR |
527 | if (unlikely(val < 0)) |
528 | return val; | |
f5bae264 GR |
529 | secondary_is_max = val & MAX16065_WARNING_OV; |
530 | } | |
531 | ||
532 | /* Read scale registers, convert to range */ | |
533 | for (i = 0; i < DIV_ROUND_UP(data->num_adc, 4); i++) { | |
534 | val = i2c_smbus_read_byte_data(client, MAX16065_SCALE(i)); | |
918ddef3 GR |
535 | if (unlikely(val < 0)) |
536 | return val; | |
f5bae264 GR |
537 | for (j = 0; j < 4 && i * 4 + j < data->num_adc; j++) { |
538 | data->range[i * 4 + j] = | |
539 | max16065_adc_range[(val >> (j * 2)) & 0x3]; | |
540 | } | |
541 | } | |
542 | ||
543 | /* Read limits */ | |
544 | for (i = 0; i < MAX16065_NUM_LIMIT; i++) { | |
545 | if (i == 0 && !have_secondary) | |
546 | continue; | |
547 | ||
548 | for (j = 0; j < data->num_adc; j++) { | |
549 | val = i2c_smbus_read_byte_data(client, | |
550 | MAX16065_LIMIT(i, j)); | |
918ddef3 GR |
551 | if (unlikely(val < 0)) |
552 | return val; | |
f5bae264 GR |
553 | data->limit[i][j] = LIMIT_TO_MV(val, data->range[j]); |
554 | } | |
555 | } | |
556 | ||
38c75dc3 GR |
557 | /* sysfs hooks */ |
558 | data->groups[groups++] = &max16065_basic_group; | |
559 | if (have_secondary) | |
560 | data->groups[groups++] = secondary_is_max ? | |
561 | &max16065_max_group : &max16065_min_group; | |
f5bae264 GR |
562 | |
563 | if (data->have_current) { | |
564 | val = i2c_smbus_read_byte_data(client, MAX16065_CURR_CONTROL); | |
38c75dc3 GR |
565 | if (unlikely(val < 0)) |
566 | return val; | |
f5bae264 GR |
567 | if (val & MAX16065_CURR_ENABLE) { |
568 | /* | |
569 | * Current gain is 6, 12, 24, 48 based on values in | |
570 | * bit 2,3. | |
571 | */ | |
572 | data->curr_gain = 6 << ((val >> 2) & 0x03); | |
573 | data->range[MAX16065_NUM_ADC] | |
574 | = max16065_csp_adc_range[(val >> 1) & 0x01]; | |
38c75dc3 | 575 | data->groups[groups++] = &max16065_current_group; |
f5bae264 GR |
576 | } else { |
577 | data->have_current = false; | |
578 | } | |
579 | } | |
580 | ||
38c75dc3 GR |
581 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
582 | data, data->groups); | |
a7b30ea5 | 583 | return PTR_ERR_OR_ZERO(hwmon_dev); |
f5bae264 GR |
584 | } |
585 | ||
586 | static const struct i2c_device_id max16065_id[] = { | |
587 | { "max16065", max16065 }, | |
588 | { "max16066", max16066 }, | |
589 | { "max16067", max16067 }, | |
590 | { "max16068", max16068 }, | |
591 | { "max16070", max16070 }, | |
592 | { "max16071", max16071 }, | |
593 | { } | |
594 | }; | |
595 | ||
596 | MODULE_DEVICE_TABLE(i2c, max16065_id); | |
597 | ||
598 | /* This is the driver that will be inserted */ | |
599 | static struct i2c_driver max16065_driver = { | |
600 | .driver = { | |
601 | .name = "max16065", | |
602 | }, | |
67487038 | 603 | .probe_new = max16065_probe, |
f5bae264 GR |
604 | .id_table = max16065_id, |
605 | }; | |
606 | ||
f0967eea | 607 | module_i2c_driver(max16065_driver); |
f5bae264 | 608 | |
bb9a80e5 | 609 | MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); |
f5bae264 GR |
610 | MODULE_DESCRIPTION("MAX16065 driver"); |
611 | MODULE_LICENSE("GPL"); |