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24c1aa85 NG |
1 | /* |
2 | * IBM PowerNV platform sensors for temperature/fan/voltage/power | |
3 | * Copyright (C) 2014 IBM | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. | |
17 | */ | |
18 | ||
19 | #define DRVNAME "ibmpowernv" | |
20 | #define pr_fmt(fmt) DRVNAME ": " fmt | |
21 | ||
22 | #include <linux/init.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/hwmon.h> | |
26 | #include <linux/hwmon-sysfs.h> | |
27 | #include <linux/of.h> | |
28 | #include <linux/slab.h> | |
29 | ||
30 | #include <linux/platform_device.h> | |
31 | #include <asm/opal.h> | |
32 | #include <linux/err.h> | |
3df2f59f | 33 | #include <asm/cputhreads.h> |
8416915c | 34 | #include <asm/smp.h> |
24c1aa85 NG |
35 | |
36 | #define MAX_ATTR_LEN 32 | |
2bcd3787 | 37 | #define MAX_LABEL_LEN 64 |
24c1aa85 NG |
38 | |
39 | /* Sensor suffix name from DT */ | |
40 | #define DT_FAULT_ATTR_SUFFIX "faulted" | |
41 | #define DT_DATA_ATTR_SUFFIX "data" | |
42 | #define DT_THRESHOLD_ATTR_SUFFIX "thrs" | |
43 | ||
44 | /* | |
45 | * Enumerates all the types of sensors in the POWERNV platform and does index | |
46 | * into 'struct sensor_group' | |
47 | */ | |
48 | enum sensors { | |
49 | FAN, | |
96124610 | 50 | TEMP, |
24c1aa85 NG |
51 | POWER_SUPPLY, |
52 | POWER_INPUT, | |
3a2b3d37 | 53 | CURRENT, |
43d2974b | 54 | ENERGY, |
24c1aa85 NG |
55 | MAX_SENSOR_TYPE, |
56 | }; | |
57 | ||
14681637 CLG |
58 | #define INVALID_INDEX (-1U) |
59 | ||
3ab52160 CLG |
60 | /* |
61 | * 'compatible' string properties for sensor types as defined in old | |
62 | * PowerNV firmware (skiboot). These are ordered as 'enum sensors'. | |
63 | */ | |
64 | static const char * const legacy_compatibles[] = { | |
65 | "ibm,opal-sensor-cooling-fan", | |
66 | "ibm,opal-sensor-amb-temp", | |
67 | "ibm,opal-sensor-power-supply", | |
68 | "ibm,opal-sensor-power" | |
69 | }; | |
70 | ||
24c1aa85 | 71 | static struct sensor_group { |
3ab52160 | 72 | const char *name; /* matches property 'sensor-type' */ |
24c1aa85 NG |
73 | struct attribute_group group; |
74 | u32 attr_count; | |
fcaf57b6 | 75 | u32 hwmon_index; |
24c1aa85 | 76 | } sensor_groups[] = { |
3ab52160 CLG |
77 | { "fan" }, |
78 | { "temp" }, | |
79 | { "in" }, | |
3a2b3d37 SB |
80 | { "power" }, |
81 | { "curr" }, | |
43d2974b | 82 | { "energy" }, |
24c1aa85 NG |
83 | }; |
84 | ||
85 | struct sensor_data { | |
86 | u32 id; /* An opaque id of the firmware for each sensor */ | |
fcaf57b6 CLG |
87 | u32 hwmon_index; |
88 | u32 opal_index; | |
24c1aa85 | 89 | enum sensors type; |
2bcd3787 | 90 | char label[MAX_LABEL_LEN]; |
24c1aa85 NG |
91 | char name[MAX_ATTR_LEN]; |
92 | struct device_attribute dev_attr; | |
e0da9912 SB |
93 | struct sensor_group_data *sgrp_data; |
94 | }; | |
95 | ||
96 | struct sensor_group_data { | |
97 | struct mutex mutex; | |
98 | u32 gid; | |
99 | bool enable; | |
24c1aa85 NG |
100 | }; |
101 | ||
102 | struct platform_data { | |
103 | const struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1]; | |
e0da9912 | 104 | struct sensor_group_data *sgrp_data; |
24c1aa85 | 105 | u32 sensors_count; /* Total count of sensors from each group */ |
e0da9912 | 106 | u32 nr_sensor_groups; /* Total number of sensor groups */ |
24c1aa85 NG |
107 | }; |
108 | ||
24c1aa85 NG |
109 | static ssize_t show_sensor(struct device *dev, struct device_attribute *devattr, |
110 | char *buf) | |
111 | { | |
112 | struct sensor_data *sdata = container_of(devattr, struct sensor_data, | |
113 | dev_attr); | |
114 | ssize_t ret; | |
3c8c049a SB |
115 | u64 x; |
116 | ||
e0da9912 SB |
117 | if (sdata->sgrp_data && !sdata->sgrp_data->enable) |
118 | return -ENODATA; | |
119 | ||
3c8c049a | 120 | ret = opal_get_sensor_data_u64(sdata->id, &x); |
24c1aa85 | 121 | |
24c1aa85 NG |
122 | if (ret) |
123 | return ret; | |
124 | ||
125 | /* Convert temperature to milli-degrees */ | |
96124610 | 126 | if (sdata->type == TEMP) |
24c1aa85 NG |
127 | x *= 1000; |
128 | /* Convert power to micro-watts */ | |
129 | else if (sdata->type == POWER_INPUT) | |
130 | x *= 1000000; | |
131 | ||
3c8c049a | 132 | return sprintf(buf, "%llu\n", x); |
24c1aa85 NG |
133 | } |
134 | ||
e0da9912 SB |
135 | static ssize_t show_enable(struct device *dev, |
136 | struct device_attribute *devattr, char *buf) | |
137 | { | |
138 | struct sensor_data *sdata = container_of(devattr, struct sensor_data, | |
139 | dev_attr); | |
140 | ||
141 | return sprintf(buf, "%u\n", sdata->sgrp_data->enable); | |
142 | } | |
143 | ||
144 | static ssize_t store_enable(struct device *dev, | |
145 | struct device_attribute *devattr, | |
146 | const char *buf, size_t count) | |
147 | { | |
148 | struct sensor_data *sdata = container_of(devattr, struct sensor_data, | |
149 | dev_attr); | |
150 | struct sensor_group_data *sgrp_data = sdata->sgrp_data; | |
151 | int ret; | |
152 | bool data; | |
153 | ||
154 | ret = kstrtobool(buf, &data); | |
155 | if (ret) | |
156 | return ret; | |
157 | ||
158 | ret = mutex_lock_interruptible(&sgrp_data->mutex); | |
159 | if (ret) | |
160 | return ret; | |
161 | ||
162 | if (data != sgrp_data->enable) { | |
163 | ret = sensor_group_enable(sgrp_data->gid, data); | |
164 | if (!ret) | |
165 | sgrp_data->enable = data; | |
166 | } | |
167 | ||
168 | if (!ret) | |
169 | ret = count; | |
170 | ||
171 | mutex_unlock(&sgrp_data->mutex); | |
172 | return ret; | |
173 | } | |
174 | ||
2bcd3787 CLG |
175 | static ssize_t show_label(struct device *dev, struct device_attribute *devattr, |
176 | char *buf) | |
177 | { | |
178 | struct sensor_data *sdata = container_of(devattr, struct sensor_data, | |
179 | dev_attr); | |
180 | ||
181 | return sprintf(buf, "%s\n", sdata->label); | |
182 | } | |
183 | ||
e3e61f01 | 184 | static int get_logical_cpu(int hwcpu) |
3df2f59f CLG |
185 | { |
186 | int cpu; | |
187 | ||
188 | for_each_possible_cpu(cpu) | |
189 | if (get_hard_smp_processor_id(cpu) == hwcpu) | |
190 | return cpu; | |
191 | ||
192 | return -ENOENT; | |
193 | } | |
194 | ||
e3e61f01 GU |
195 | static void make_sensor_label(struct device_node *np, |
196 | struct sensor_data *sdata, const char *label) | |
2bcd3787 | 197 | { |
3df2f59f | 198 | u32 id; |
2bcd3787 CLG |
199 | size_t n; |
200 | ||
201 | n = snprintf(sdata->label, sizeof(sdata->label), "%s", label); | |
3df2f59f CLG |
202 | |
203 | /* | |
204 | * Core temp pretty print | |
205 | */ | |
206 | if (!of_property_read_u32(np, "ibm,pir", &id)) { | |
207 | int cpuid = get_logical_cpu(id); | |
208 | ||
209 | if (cpuid >= 0) | |
210 | /* | |
211 | * The digital thermal sensors are associated | |
acf32964 | 212 | * with a core. |
3df2f59f CLG |
213 | */ |
214 | n += snprintf(sdata->label + n, | |
acf32964 MN |
215 | sizeof(sdata->label) - n, " %d", |
216 | cpuid); | |
3df2f59f CLG |
217 | else |
218 | n += snprintf(sdata->label + n, | |
219 | sizeof(sdata->label) - n, " phy%d", id); | |
220 | } | |
221 | ||
222 | /* | |
223 | * Membuffer pretty print | |
224 | */ | |
225 | if (!of_property_read_u32(np, "ibm,chip-id", &id)) | |
226 | n += snprintf(sdata->label + n, sizeof(sdata->label) - n, | |
227 | " %d", id & 0xffff); | |
2bcd3787 CLG |
228 | } |
229 | ||
230 | static int get_sensor_index_attr(const char *name, u32 *index, char *attr) | |
24c1aa85 NG |
231 | { |
232 | char *hash_pos = strchr(name, '#'); | |
233 | char buf[8] = { 0 }; | |
234 | char *dash_pos; | |
235 | u32 copy_len; | |
236 | int err; | |
237 | ||
238 | if (!hash_pos) | |
239 | return -EINVAL; | |
240 | ||
241 | dash_pos = strchr(hash_pos, '-'); | |
242 | if (!dash_pos) | |
243 | return -EINVAL; | |
244 | ||
245 | copy_len = dash_pos - hash_pos - 1; | |
246 | if (copy_len >= sizeof(buf)) | |
247 | return -EINVAL; | |
248 | ||
249 | strncpy(buf, hash_pos + 1, copy_len); | |
250 | ||
251 | err = kstrtou32(buf, 10, index); | |
252 | if (err) | |
253 | return err; | |
254 | ||
255 | strncpy(attr, dash_pos + 1, MAX_ATTR_LEN); | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
ccc9ac6c CLG |
260 | static const char *convert_opal_attr_name(enum sensors type, |
261 | const char *opal_attr) | |
262 | { | |
263 | const char *attr_name = NULL; | |
264 | ||
265 | if (!strcmp(opal_attr, DT_FAULT_ATTR_SUFFIX)) { | |
266 | attr_name = "fault"; | |
267 | } else if (!strcmp(opal_attr, DT_DATA_ATTR_SUFFIX)) { | |
268 | attr_name = "input"; | |
269 | } else if (!strcmp(opal_attr, DT_THRESHOLD_ATTR_SUFFIX)) { | |
270 | if (type == TEMP) | |
271 | attr_name = "max"; | |
272 | else if (type == FAN) | |
273 | attr_name = "min"; | |
274 | } | |
275 | ||
276 | return attr_name; | |
277 | } | |
278 | ||
24c1aa85 NG |
279 | /* |
280 | * This function translates the DT node name into the 'hwmon' attribute name. | |
281 | * IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc. | |
282 | * which need to be mapped as fan2_input, temp1_max respectively before | |
283 | * populating them inside hwmon device class. | |
284 | */ | |
f9f54f16 CLG |
285 | static const char *parse_opal_node_name(const char *node_name, |
286 | enum sensors type, u32 *index) | |
24c1aa85 NG |
287 | { |
288 | char attr_suffix[MAX_ATTR_LEN]; | |
ccc9ac6c | 289 | const char *attr_name; |
24c1aa85 NG |
290 | int err; |
291 | ||
f9f54f16 CLG |
292 | err = get_sensor_index_attr(node_name, index, attr_suffix); |
293 | if (err) | |
294 | return ERR_PTR(err); | |
24c1aa85 | 295 | |
ccc9ac6c CLG |
296 | attr_name = convert_opal_attr_name(type, attr_suffix); |
297 | if (!attr_name) | |
f9f54f16 | 298 | return ERR_PTR(-ENOENT); |
24c1aa85 | 299 | |
f9f54f16 | 300 | return attr_name; |
24c1aa85 NG |
301 | } |
302 | ||
c4ad4720 CLG |
303 | static int get_sensor_type(struct device_node *np) |
304 | { | |
305 | enum sensors type; | |
14681637 | 306 | const char *str; |
c4ad4720 | 307 | |
3ab52160 CLG |
308 | for (type = 0; type < ARRAY_SIZE(legacy_compatibles); type++) { |
309 | if (of_device_is_compatible(np, legacy_compatibles[type])) | |
c4ad4720 CLG |
310 | return type; |
311 | } | |
14681637 CLG |
312 | |
313 | /* | |
314 | * Let's check if we have a newer device tree | |
315 | */ | |
316 | if (!of_device_is_compatible(np, "ibm,opal-sensor")) | |
317 | return MAX_SENSOR_TYPE; | |
318 | ||
319 | if (of_property_read_string(np, "sensor-type", &str)) | |
320 | return MAX_SENSOR_TYPE; | |
321 | ||
322 | for (type = 0; type < MAX_SENSOR_TYPE; type++) | |
323 | if (!strcmp(str, sensor_groups[type].name)) | |
324 | return type; | |
325 | ||
c4ad4720 CLG |
326 | return MAX_SENSOR_TYPE; |
327 | } | |
328 | ||
fcaf57b6 CLG |
329 | static u32 get_sensor_hwmon_index(struct sensor_data *sdata, |
330 | struct sensor_data *sdata_table, int count) | |
331 | { | |
332 | int i; | |
333 | ||
14681637 CLG |
334 | /* |
335 | * We don't use the OPAL index on newer device trees | |
336 | */ | |
337 | if (sdata->opal_index != INVALID_INDEX) { | |
338 | for (i = 0; i < count; i++) | |
339 | if (sdata_table[i].opal_index == sdata->opal_index && | |
340 | sdata_table[i].type == sdata->type) | |
341 | return sdata_table[i].hwmon_index; | |
342 | } | |
fcaf57b6 CLG |
343 | return ++sensor_groups[sdata->type].hwmon_index; |
344 | } | |
345 | ||
e0da9912 SB |
346 | static int init_sensor_group_data(struct platform_device *pdev, |
347 | struct platform_data *pdata) | |
348 | { | |
349 | struct sensor_group_data *sgrp_data; | |
350 | struct device_node *groups, *sgrp; | |
351 | int count = 0, ret = 0; | |
352 | enum sensors type; | |
353 | ||
354 | groups = of_find_compatible_node(NULL, NULL, "ibm,opal-sensor-group"); | |
355 | if (!groups) | |
356 | return ret; | |
357 | ||
358 | for_each_child_of_node(groups, sgrp) { | |
359 | type = get_sensor_type(sgrp); | |
360 | if (type != MAX_SENSOR_TYPE) | |
361 | pdata->nr_sensor_groups++; | |
362 | } | |
363 | ||
364 | if (!pdata->nr_sensor_groups) | |
365 | goto out; | |
366 | ||
367 | sgrp_data = devm_kcalloc(&pdev->dev, pdata->nr_sensor_groups, | |
368 | sizeof(*sgrp_data), GFP_KERNEL); | |
369 | if (!sgrp_data) { | |
370 | ret = -ENOMEM; | |
371 | goto out; | |
372 | } | |
373 | ||
374 | for_each_child_of_node(groups, sgrp) { | |
375 | u32 gid; | |
376 | ||
377 | type = get_sensor_type(sgrp); | |
378 | if (type == MAX_SENSOR_TYPE) | |
379 | continue; | |
380 | ||
381 | if (of_property_read_u32(sgrp, "sensor-group-id", &gid)) | |
382 | continue; | |
383 | ||
384 | if (of_count_phandle_with_args(sgrp, "sensors", NULL) <= 0) | |
385 | continue; | |
386 | ||
387 | sensor_groups[type].attr_count++; | |
388 | sgrp_data[count].gid = gid; | |
389 | mutex_init(&sgrp_data[count].mutex); | |
390 | sgrp_data[count++].enable = false; | |
391 | } | |
392 | ||
393 | pdata->sgrp_data = sgrp_data; | |
394 | out: | |
395 | of_node_put(groups); | |
396 | return ret; | |
397 | } | |
398 | ||
399 | static struct sensor_group_data *get_sensor_group(struct platform_data *pdata, | |
400 | struct device_node *node, | |
401 | enum sensors gtype) | |
402 | { | |
403 | struct sensor_group_data *sgrp_data = pdata->sgrp_data; | |
404 | struct device_node *groups, *sgrp; | |
405 | ||
406 | groups = of_find_compatible_node(NULL, NULL, "ibm,opal-sensor-group"); | |
407 | if (!groups) | |
408 | return NULL; | |
409 | ||
410 | for_each_child_of_node(groups, sgrp) { | |
411 | struct of_phandle_iterator it; | |
412 | u32 gid; | |
413 | int rc, i; | |
414 | enum sensors type; | |
415 | ||
416 | type = get_sensor_type(sgrp); | |
417 | if (type != gtype) | |
418 | continue; | |
419 | ||
420 | if (of_property_read_u32(sgrp, "sensor-group-id", &gid)) | |
421 | continue; | |
422 | ||
423 | of_for_each_phandle(&it, rc, sgrp, "sensors", NULL, 0) | |
424 | if (it.phandle == node->phandle) { | |
425 | of_node_put(it.node); | |
426 | break; | |
427 | } | |
428 | ||
429 | if (rc) | |
430 | continue; | |
431 | ||
432 | for (i = 0; i < pdata->nr_sensor_groups; i++) | |
433 | if (gid == sgrp_data[i].gid) { | |
434 | of_node_put(sgrp); | |
435 | of_node_put(groups); | |
436 | return &sgrp_data[i]; | |
437 | } | |
438 | } | |
439 | ||
440 | of_node_put(groups); | |
441 | return NULL; | |
442 | } | |
443 | ||
8de303ba | 444 | static int populate_attr_groups(struct platform_device *pdev) |
24c1aa85 NG |
445 | { |
446 | struct platform_data *pdata = platform_get_drvdata(pdev); | |
447 | const struct attribute_group **pgroups = pdata->attr_groups; | |
448 | struct device_node *opal, *np; | |
449 | enum sensors type; | |
e0da9912 SB |
450 | int ret; |
451 | ||
452 | ret = init_sensor_group_data(pdev, pdata); | |
453 | if (ret) | |
454 | return ret; | |
24c1aa85 NG |
455 | |
456 | opal = of_find_node_by_path("/ibm,opal/sensors"); | |
24c1aa85 | 457 | for_each_child_of_node(opal, np) { |
2bcd3787 CLG |
458 | const char *label; |
459 | ||
c4ad4720 | 460 | type = get_sensor_type(np); |
2bcd3787 CLG |
461 | if (type == MAX_SENSOR_TYPE) |
462 | continue; | |
463 | ||
464 | sensor_groups[type].attr_count++; | |
465 | ||
466 | /* | |
996cf5a5 | 467 | * add attributes for labels, min and max |
2bcd3787 CLG |
468 | */ |
469 | if (!of_property_read_string(np, "label", &label)) | |
c4ad4720 | 470 | sensor_groups[type].attr_count++; |
996cf5a5 SB |
471 | if (of_find_property(np, "sensor-data-min", NULL)) |
472 | sensor_groups[type].attr_count++; | |
473 | if (of_find_property(np, "sensor-data-max", NULL)) | |
474 | sensor_groups[type].attr_count++; | |
24c1aa85 NG |
475 | } |
476 | ||
477 | of_node_put(opal); | |
478 | ||
479 | for (type = 0; type < MAX_SENSOR_TYPE; type++) { | |
a86854d0 KC |
480 | sensor_groups[type].group.attrs = devm_kcalloc(&pdev->dev, |
481 | sensor_groups[type].attr_count + 1, | |
482 | sizeof(struct attribute *), | |
24c1aa85 NG |
483 | GFP_KERNEL); |
484 | if (!sensor_groups[type].group.attrs) | |
485 | return -ENOMEM; | |
486 | ||
487 | pgroups[type] = &sensor_groups[type].group; | |
488 | pdata->sensors_count += sensor_groups[type].attr_count; | |
489 | sensor_groups[type].attr_count = 0; | |
490 | } | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
9e4f74b1 CLG |
495 | static void create_hwmon_attr(struct sensor_data *sdata, const char *attr_name, |
496 | ssize_t (*show)(struct device *dev, | |
497 | struct device_attribute *attr, | |
e0da9912 SB |
498 | char *buf), |
499 | ssize_t (*store)(struct device *dev, | |
500 | struct device_attribute *attr, | |
501 | const char *buf, size_t count)) | |
9e4f74b1 CLG |
502 | { |
503 | snprintf(sdata->name, MAX_ATTR_LEN, "%s%d_%s", | |
504 | sensor_groups[sdata->type].name, sdata->hwmon_index, | |
505 | attr_name); | |
506 | ||
507 | sysfs_attr_init(&sdata->dev_attr.attr); | |
508 | sdata->dev_attr.attr.name = sdata->name; | |
9e4f74b1 | 509 | sdata->dev_attr.show = show; |
e0da9912 SB |
510 | if (store) { |
511 | sdata->dev_attr.store = store; | |
512 | sdata->dev_attr.attr.mode = 0664; | |
513 | } else { | |
514 | sdata->dev_attr.attr.mode = 0444; | |
515 | } | |
9e4f74b1 CLG |
516 | } |
517 | ||
996cf5a5 SB |
518 | static void populate_sensor(struct sensor_data *sdata, int od, int hd, int sid, |
519 | const char *attr_name, enum sensors type, | |
520 | const struct attribute_group *pgroup, | |
e0da9912 | 521 | struct sensor_group_data *sgrp_data, |
996cf5a5 SB |
522 | ssize_t (*show)(struct device *dev, |
523 | struct device_attribute *attr, | |
e0da9912 SB |
524 | char *buf), |
525 | ssize_t (*store)(struct device *dev, | |
526 | struct device_attribute *attr, | |
527 | const char *buf, size_t count)) | |
996cf5a5 SB |
528 | { |
529 | sdata->id = sid; | |
530 | sdata->type = type; | |
531 | sdata->opal_index = od; | |
532 | sdata->hwmon_index = hd; | |
e0da9912 | 533 | create_hwmon_attr(sdata, attr_name, show, store); |
996cf5a5 | 534 | pgroup->attrs[sensor_groups[type].attr_count++] = &sdata->dev_attr.attr; |
e0da9912 | 535 | sdata->sgrp_data = sgrp_data; |
996cf5a5 SB |
536 | } |
537 | ||
538 | static char *get_max_attr(enum sensors type) | |
539 | { | |
540 | switch (type) { | |
541 | case POWER_INPUT: | |
542 | return "input_highest"; | |
543 | default: | |
544 | return "highest"; | |
545 | } | |
546 | } | |
547 | ||
548 | static char *get_min_attr(enum sensors type) | |
549 | { | |
550 | switch (type) { | |
551 | case POWER_INPUT: | |
552 | return "input_lowest"; | |
553 | default: | |
554 | return "lowest"; | |
555 | } | |
556 | } | |
557 | ||
24c1aa85 NG |
558 | /* |
559 | * Iterate through the device tree for each child of 'sensors' node, create | |
560 | * a sysfs attribute file, the file is named by translating the DT node name | |
561 | * to the name required by the higher 'hwmon' driver like fan1_input, temp1_max | |
562 | * etc.. | |
563 | */ | |
8de303ba | 564 | static int create_device_attrs(struct platform_device *pdev) |
24c1aa85 NG |
565 | { |
566 | struct platform_data *pdata = platform_get_drvdata(pdev); | |
567 | const struct attribute_group **pgroups = pdata->attr_groups; | |
568 | struct device_node *opal, *np; | |
569 | struct sensor_data *sdata; | |
24c1aa85 | 570 | u32 count = 0; |
e0da9912 | 571 | u32 group_attr_id[MAX_SENSOR_TYPE] = {0}; |
24c1aa85 | 572 | |
a86854d0 KC |
573 | sdata = devm_kcalloc(&pdev->dev, |
574 | pdata->sensors_count, sizeof(*sdata), | |
24c1aa85 | 575 | GFP_KERNEL); |
e0da9912 SB |
576 | if (!sdata) |
577 | return -ENOMEM; | |
24c1aa85 | 578 | |
e0da9912 | 579 | opal = of_find_node_by_path("/ibm,opal/sensors"); |
24c1aa85 | 580 | for_each_child_of_node(opal, np) { |
e0da9912 | 581 | struct sensor_group_data *sgrp_data; |
f9f54f16 | 582 | const char *attr_name; |
e0da9912 SB |
583 | u32 opal_index, hw_id; |
584 | u32 sensor_id; | |
2bcd3787 | 585 | const char *label; |
e0da9912 | 586 | enum sensors type; |
f9f54f16 | 587 | |
c4ad4720 | 588 | type = get_sensor_type(np); |
24c1aa85 NG |
589 | if (type == MAX_SENSOR_TYPE) |
590 | continue; | |
591 | ||
14681637 CLG |
592 | /* |
593 | * Newer device trees use a "sensor-data" property | |
594 | * name for input. | |
595 | */ | |
596 | if (of_property_read_u32(np, "sensor-id", &sensor_id) && | |
597 | of_property_read_u32(np, "sensor-data", &sensor_id)) { | |
24c1aa85 | 598 | dev_info(&pdev->dev, |
0debe4d0 RH |
599 | "'sensor-id' missing in the node '%pOFn'\n", |
600 | np); | |
24c1aa85 NG |
601 | continue; |
602 | } | |
603 | ||
18d03f3c | 604 | sdata[count].id = sensor_id; |
24c1aa85 | 605 | sdata[count].type = type; |
f9f54f16 | 606 | |
14681637 CLG |
607 | /* |
608 | * If we can not parse the node name, it means we are | |
609 | * running on a newer device tree. We can just forget | |
610 | * about the OPAL index and use a defaut value for the | |
611 | * hwmon attribute name | |
612 | */ | |
f9f54f16 CLG |
613 | attr_name = parse_opal_node_name(np->name, type, &opal_index); |
614 | if (IS_ERR(attr_name)) { | |
14681637 CLG |
615 | attr_name = "input"; |
616 | opal_index = INVALID_INDEX; | |
f9f54f16 CLG |
617 | } |
618 | ||
e0da9912 SB |
619 | hw_id = get_sensor_hwmon_index(&sdata[count], sdata, count); |
620 | sgrp_data = get_sensor_group(pdata, np, type); | |
621 | populate_sensor(&sdata[count], opal_index, hw_id, sensor_id, | |
622 | attr_name, type, pgroups[type], sgrp_data, | |
623 | show_sensor, NULL); | |
624 | count++; | |
2bcd3787 CLG |
625 | |
626 | if (!of_property_read_string(np, "label", &label)) { | |
627 | /* | |
628 | * For the label attribute, we can reuse the | |
629 | * "properties" of the previous "input" | |
630 | * attribute. They are related to the same | |
631 | * sensor. | |
632 | */ | |
2bcd3787 CLG |
633 | |
634 | make_sensor_label(np, &sdata[count], label); | |
e0da9912 | 635 | populate_sensor(&sdata[count], opal_index, hw_id, |
996cf5a5 | 636 | sensor_id, "label", type, pgroups[type], |
e0da9912 | 637 | NULL, show_label, NULL); |
996cf5a5 SB |
638 | count++; |
639 | } | |
2bcd3787 | 640 | |
996cf5a5 SB |
641 | if (!of_property_read_u32(np, "sensor-data-max", &sensor_id)) { |
642 | attr_name = get_max_attr(type); | |
e0da9912 | 643 | populate_sensor(&sdata[count], opal_index, hw_id, |
996cf5a5 | 644 | sensor_id, attr_name, type, |
e0da9912 SB |
645 | pgroups[type], sgrp_data, show_sensor, |
646 | NULL); | |
996cf5a5 SB |
647 | count++; |
648 | } | |
2bcd3787 | 649 | |
996cf5a5 SB |
650 | if (!of_property_read_u32(np, "sensor-data-min", &sensor_id)) { |
651 | attr_name = get_min_attr(type); | |
e0da9912 | 652 | populate_sensor(&sdata[count], opal_index, hw_id, |
996cf5a5 | 653 | sensor_id, attr_name, type, |
e0da9912 SB |
654 | pgroups[type], sgrp_data, show_sensor, |
655 | NULL); | |
656 | count++; | |
657 | } | |
658 | ||
659 | if (sgrp_data && !sgrp_data->enable) { | |
660 | sgrp_data->enable = true; | |
661 | hw_id = ++group_attr_id[type]; | |
662 | populate_sensor(&sdata[count], opal_index, hw_id, | |
663 | sgrp_data->gid, "enable", type, | |
664 | pgroups[type], sgrp_data, show_enable, | |
665 | store_enable); | |
996cf5a5 | 666 | count++; |
2bcd3787 | 667 | } |
24c1aa85 NG |
668 | } |
669 | ||
24c1aa85 | 670 | of_node_put(opal); |
e0da9912 | 671 | return 0; |
24c1aa85 NG |
672 | } |
673 | ||
8de303ba | 674 | static int ibmpowernv_probe(struct platform_device *pdev) |
24c1aa85 NG |
675 | { |
676 | struct platform_data *pdata; | |
677 | struct device *hwmon_dev; | |
678 | int err; | |
679 | ||
680 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
681 | if (!pdata) | |
682 | return -ENOMEM; | |
683 | ||
684 | platform_set_drvdata(pdev, pdata); | |
685 | pdata->sensors_count = 0; | |
e0da9912 | 686 | pdata->nr_sensor_groups = 0; |
24c1aa85 NG |
687 | err = populate_attr_groups(pdev); |
688 | if (err) | |
689 | return err; | |
690 | ||
691 | /* Create sysfs attribute data for each sensor found in the DT */ | |
692 | err = create_device_attrs(pdev); | |
693 | if (err) | |
694 | return err; | |
695 | ||
696 | /* Finally, register with hwmon */ | |
697 | hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME, | |
698 | pdata, | |
699 | pdata->attr_groups); | |
700 | ||
701 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
702 | } | |
703 | ||
8de303ba NG |
704 | static const struct platform_device_id opal_sensor_driver_ids[] = { |
705 | { | |
706 | .name = "opal-sensor", | |
707 | }, | |
708 | { } | |
709 | }; | |
710 | MODULE_DEVICE_TABLE(platform, opal_sensor_driver_ids); | |
711 | ||
0b056b29 CLG |
712 | static const struct of_device_id opal_sensor_match[] = { |
713 | { .compatible = "ibm,opal-sensor" }, | |
714 | { }, | |
715 | }; | |
716 | MODULE_DEVICE_TABLE(of, opal_sensor_match); | |
717 | ||
24c1aa85 | 718 | static struct platform_driver ibmpowernv_driver = { |
8de303ba NG |
719 | .probe = ibmpowernv_probe, |
720 | .id_table = opal_sensor_driver_ids, | |
721 | .driver = { | |
8de303ba | 722 | .name = DRVNAME, |
0b056b29 | 723 | .of_match_table = opal_sensor_match, |
24c1aa85 NG |
724 | }, |
725 | }; | |
726 | ||
3bdec670 | 727 | module_platform_driver(ibmpowernv_driver); |
24c1aa85 NG |
728 | |
729 | MODULE_AUTHOR("Neelesh Gupta <neelegup@linux.vnet.ibm.com>"); | |
730 | MODULE_DESCRIPTION("IBM POWERNV platform sensors"); | |
731 | MODULE_LICENSE("GPL"); |