]>
Commit | Line | Data |
---|---|---|
d5bb994b | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
24c1aa85 NG |
2 | /* |
3 | * IBM PowerNV platform sensors for temperature/fan/voltage/power | |
4 | * Copyright (C) 2014 IBM | |
24c1aa85 NG |
5 | */ |
6 | ||
7 | #define DRVNAME "ibmpowernv" | |
8 | #define pr_fmt(fmt) DRVNAME ": " fmt | |
9 | ||
10 | #include <linux/init.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/hwmon.h> | |
14 | #include <linux/hwmon-sysfs.h> | |
15 | #include <linux/of.h> | |
16 | #include <linux/slab.h> | |
17 | ||
18 | #include <linux/platform_device.h> | |
19 | #include <asm/opal.h> | |
20 | #include <linux/err.h> | |
3df2f59f | 21 | #include <asm/cputhreads.h> |
8416915c | 22 | #include <asm/smp.h> |
24c1aa85 NG |
23 | |
24 | #define MAX_ATTR_LEN 32 | |
2bcd3787 | 25 | #define MAX_LABEL_LEN 64 |
24c1aa85 NG |
26 | |
27 | /* Sensor suffix name from DT */ | |
28 | #define DT_FAULT_ATTR_SUFFIX "faulted" | |
29 | #define DT_DATA_ATTR_SUFFIX "data" | |
30 | #define DT_THRESHOLD_ATTR_SUFFIX "thrs" | |
31 | ||
32 | /* | |
33 | * Enumerates all the types of sensors in the POWERNV platform and does index | |
34 | * into 'struct sensor_group' | |
35 | */ | |
36 | enum sensors { | |
37 | FAN, | |
96124610 | 38 | TEMP, |
24c1aa85 NG |
39 | POWER_SUPPLY, |
40 | POWER_INPUT, | |
3a2b3d37 | 41 | CURRENT, |
43d2974b | 42 | ENERGY, |
24c1aa85 NG |
43 | MAX_SENSOR_TYPE, |
44 | }; | |
45 | ||
14681637 CLG |
46 | #define INVALID_INDEX (-1U) |
47 | ||
3ab52160 CLG |
48 | /* |
49 | * 'compatible' string properties for sensor types as defined in old | |
50 | * PowerNV firmware (skiboot). These are ordered as 'enum sensors'. | |
51 | */ | |
52 | static const char * const legacy_compatibles[] = { | |
53 | "ibm,opal-sensor-cooling-fan", | |
54 | "ibm,opal-sensor-amb-temp", | |
55 | "ibm,opal-sensor-power-supply", | |
56 | "ibm,opal-sensor-power" | |
57 | }; | |
58 | ||
24c1aa85 | 59 | static struct sensor_group { |
3ab52160 | 60 | const char *name; /* matches property 'sensor-type' */ |
24c1aa85 NG |
61 | struct attribute_group group; |
62 | u32 attr_count; | |
fcaf57b6 | 63 | u32 hwmon_index; |
24c1aa85 | 64 | } sensor_groups[] = { |
3ab52160 CLG |
65 | { "fan" }, |
66 | { "temp" }, | |
67 | { "in" }, | |
3a2b3d37 SB |
68 | { "power" }, |
69 | { "curr" }, | |
43d2974b | 70 | { "energy" }, |
24c1aa85 NG |
71 | }; |
72 | ||
73 | struct sensor_data { | |
74 | u32 id; /* An opaque id of the firmware for each sensor */ | |
fcaf57b6 CLG |
75 | u32 hwmon_index; |
76 | u32 opal_index; | |
24c1aa85 | 77 | enum sensors type; |
2bcd3787 | 78 | char label[MAX_LABEL_LEN]; |
24c1aa85 NG |
79 | char name[MAX_ATTR_LEN]; |
80 | struct device_attribute dev_attr; | |
e0da9912 SB |
81 | struct sensor_group_data *sgrp_data; |
82 | }; | |
83 | ||
84 | struct sensor_group_data { | |
85 | struct mutex mutex; | |
86 | u32 gid; | |
87 | bool enable; | |
24c1aa85 NG |
88 | }; |
89 | ||
90 | struct platform_data { | |
91 | const struct attribute_group *attr_groups[MAX_SENSOR_TYPE + 1]; | |
e0da9912 | 92 | struct sensor_group_data *sgrp_data; |
24c1aa85 | 93 | u32 sensors_count; /* Total count of sensors from each group */ |
e0da9912 | 94 | u32 nr_sensor_groups; /* Total number of sensor groups */ |
24c1aa85 NG |
95 | }; |
96 | ||
24c1aa85 NG |
97 | static ssize_t show_sensor(struct device *dev, struct device_attribute *devattr, |
98 | char *buf) | |
99 | { | |
100 | struct sensor_data *sdata = container_of(devattr, struct sensor_data, | |
101 | dev_attr); | |
102 | ssize_t ret; | |
3c8c049a SB |
103 | u64 x; |
104 | ||
e0da9912 SB |
105 | if (sdata->sgrp_data && !sdata->sgrp_data->enable) |
106 | return -ENODATA; | |
107 | ||
3c8c049a | 108 | ret = opal_get_sensor_data_u64(sdata->id, &x); |
24c1aa85 | 109 | |
24c1aa85 NG |
110 | if (ret) |
111 | return ret; | |
112 | ||
113 | /* Convert temperature to milli-degrees */ | |
96124610 | 114 | if (sdata->type == TEMP) |
24c1aa85 NG |
115 | x *= 1000; |
116 | /* Convert power to micro-watts */ | |
117 | else if (sdata->type == POWER_INPUT) | |
118 | x *= 1000000; | |
119 | ||
3c8c049a | 120 | return sprintf(buf, "%llu\n", x); |
24c1aa85 NG |
121 | } |
122 | ||
e0da9912 SB |
123 | static ssize_t show_enable(struct device *dev, |
124 | struct device_attribute *devattr, char *buf) | |
125 | { | |
126 | struct sensor_data *sdata = container_of(devattr, struct sensor_data, | |
127 | dev_attr); | |
128 | ||
129 | return sprintf(buf, "%u\n", sdata->sgrp_data->enable); | |
130 | } | |
131 | ||
132 | static ssize_t store_enable(struct device *dev, | |
133 | struct device_attribute *devattr, | |
134 | const char *buf, size_t count) | |
135 | { | |
136 | struct sensor_data *sdata = container_of(devattr, struct sensor_data, | |
137 | dev_attr); | |
138 | struct sensor_group_data *sgrp_data = sdata->sgrp_data; | |
139 | int ret; | |
140 | bool data; | |
141 | ||
142 | ret = kstrtobool(buf, &data); | |
143 | if (ret) | |
144 | return ret; | |
145 | ||
146 | ret = mutex_lock_interruptible(&sgrp_data->mutex); | |
147 | if (ret) | |
148 | return ret; | |
149 | ||
150 | if (data != sgrp_data->enable) { | |
151 | ret = sensor_group_enable(sgrp_data->gid, data); | |
152 | if (!ret) | |
153 | sgrp_data->enable = data; | |
154 | } | |
155 | ||
156 | if (!ret) | |
157 | ret = count; | |
158 | ||
159 | mutex_unlock(&sgrp_data->mutex); | |
160 | return ret; | |
161 | } | |
162 | ||
2bcd3787 CLG |
163 | static ssize_t show_label(struct device *dev, struct device_attribute *devattr, |
164 | char *buf) | |
165 | { | |
166 | struct sensor_data *sdata = container_of(devattr, struct sensor_data, | |
167 | dev_attr); | |
168 | ||
169 | return sprintf(buf, "%s\n", sdata->label); | |
170 | } | |
171 | ||
e3e61f01 | 172 | static int get_logical_cpu(int hwcpu) |
3df2f59f CLG |
173 | { |
174 | int cpu; | |
175 | ||
176 | for_each_possible_cpu(cpu) | |
177 | if (get_hard_smp_processor_id(cpu) == hwcpu) | |
178 | return cpu; | |
179 | ||
180 | return -ENOENT; | |
181 | } | |
182 | ||
e3e61f01 GU |
183 | static void make_sensor_label(struct device_node *np, |
184 | struct sensor_data *sdata, const char *label) | |
2bcd3787 | 185 | { |
3df2f59f | 186 | u32 id; |
2bcd3787 CLG |
187 | size_t n; |
188 | ||
189 | n = snprintf(sdata->label, sizeof(sdata->label), "%s", label); | |
3df2f59f CLG |
190 | |
191 | /* | |
192 | * Core temp pretty print | |
193 | */ | |
194 | if (!of_property_read_u32(np, "ibm,pir", &id)) { | |
195 | int cpuid = get_logical_cpu(id); | |
196 | ||
197 | if (cpuid >= 0) | |
198 | /* | |
199 | * The digital thermal sensors are associated | |
acf32964 | 200 | * with a core. |
3df2f59f CLG |
201 | */ |
202 | n += snprintf(sdata->label + n, | |
acf32964 MN |
203 | sizeof(sdata->label) - n, " %d", |
204 | cpuid); | |
3df2f59f CLG |
205 | else |
206 | n += snprintf(sdata->label + n, | |
207 | sizeof(sdata->label) - n, " phy%d", id); | |
208 | } | |
209 | ||
210 | /* | |
211 | * Membuffer pretty print | |
212 | */ | |
213 | if (!of_property_read_u32(np, "ibm,chip-id", &id)) | |
214 | n += snprintf(sdata->label + n, sizeof(sdata->label) - n, | |
215 | " %d", id & 0xffff); | |
2bcd3787 CLG |
216 | } |
217 | ||
218 | static int get_sensor_index_attr(const char *name, u32 *index, char *attr) | |
24c1aa85 NG |
219 | { |
220 | char *hash_pos = strchr(name, '#'); | |
221 | char buf[8] = { 0 }; | |
222 | char *dash_pos; | |
223 | u32 copy_len; | |
224 | int err; | |
225 | ||
226 | if (!hash_pos) | |
227 | return -EINVAL; | |
228 | ||
229 | dash_pos = strchr(hash_pos, '-'); | |
230 | if (!dash_pos) | |
231 | return -EINVAL; | |
232 | ||
233 | copy_len = dash_pos - hash_pos - 1; | |
234 | if (copy_len >= sizeof(buf)) | |
235 | return -EINVAL; | |
236 | ||
237 | strncpy(buf, hash_pos + 1, copy_len); | |
238 | ||
239 | err = kstrtou32(buf, 10, index); | |
240 | if (err) | |
241 | return err; | |
242 | ||
243 | strncpy(attr, dash_pos + 1, MAX_ATTR_LEN); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
ccc9ac6c CLG |
248 | static const char *convert_opal_attr_name(enum sensors type, |
249 | const char *opal_attr) | |
250 | { | |
251 | const char *attr_name = NULL; | |
252 | ||
253 | if (!strcmp(opal_attr, DT_FAULT_ATTR_SUFFIX)) { | |
254 | attr_name = "fault"; | |
255 | } else if (!strcmp(opal_attr, DT_DATA_ATTR_SUFFIX)) { | |
256 | attr_name = "input"; | |
257 | } else if (!strcmp(opal_attr, DT_THRESHOLD_ATTR_SUFFIX)) { | |
258 | if (type == TEMP) | |
259 | attr_name = "max"; | |
260 | else if (type == FAN) | |
261 | attr_name = "min"; | |
262 | } | |
263 | ||
264 | return attr_name; | |
265 | } | |
266 | ||
24c1aa85 NG |
267 | /* |
268 | * This function translates the DT node name into the 'hwmon' attribute name. | |
269 | * IBMPOWERNV device node appear like cooling-fan#2-data, amb-temp#1-thrs etc. | |
270 | * which need to be mapped as fan2_input, temp1_max respectively before | |
271 | * populating them inside hwmon device class. | |
272 | */ | |
f9f54f16 CLG |
273 | static const char *parse_opal_node_name(const char *node_name, |
274 | enum sensors type, u32 *index) | |
24c1aa85 NG |
275 | { |
276 | char attr_suffix[MAX_ATTR_LEN]; | |
ccc9ac6c | 277 | const char *attr_name; |
24c1aa85 NG |
278 | int err; |
279 | ||
f9f54f16 CLG |
280 | err = get_sensor_index_attr(node_name, index, attr_suffix); |
281 | if (err) | |
282 | return ERR_PTR(err); | |
24c1aa85 | 283 | |
ccc9ac6c CLG |
284 | attr_name = convert_opal_attr_name(type, attr_suffix); |
285 | if (!attr_name) | |
f9f54f16 | 286 | return ERR_PTR(-ENOENT); |
24c1aa85 | 287 | |
f9f54f16 | 288 | return attr_name; |
24c1aa85 NG |
289 | } |
290 | ||
c4ad4720 CLG |
291 | static int get_sensor_type(struct device_node *np) |
292 | { | |
293 | enum sensors type; | |
14681637 | 294 | const char *str; |
c4ad4720 | 295 | |
3ab52160 CLG |
296 | for (type = 0; type < ARRAY_SIZE(legacy_compatibles); type++) { |
297 | if (of_device_is_compatible(np, legacy_compatibles[type])) | |
c4ad4720 CLG |
298 | return type; |
299 | } | |
14681637 CLG |
300 | |
301 | /* | |
302 | * Let's check if we have a newer device tree | |
303 | */ | |
304 | if (!of_device_is_compatible(np, "ibm,opal-sensor")) | |
305 | return MAX_SENSOR_TYPE; | |
306 | ||
307 | if (of_property_read_string(np, "sensor-type", &str)) | |
308 | return MAX_SENSOR_TYPE; | |
309 | ||
310 | for (type = 0; type < MAX_SENSOR_TYPE; type++) | |
311 | if (!strcmp(str, sensor_groups[type].name)) | |
312 | return type; | |
313 | ||
c4ad4720 CLG |
314 | return MAX_SENSOR_TYPE; |
315 | } | |
316 | ||
fcaf57b6 CLG |
317 | static u32 get_sensor_hwmon_index(struct sensor_data *sdata, |
318 | struct sensor_data *sdata_table, int count) | |
319 | { | |
320 | int i; | |
321 | ||
14681637 CLG |
322 | /* |
323 | * We don't use the OPAL index on newer device trees | |
324 | */ | |
325 | if (sdata->opal_index != INVALID_INDEX) { | |
326 | for (i = 0; i < count; i++) | |
327 | if (sdata_table[i].opal_index == sdata->opal_index && | |
328 | sdata_table[i].type == sdata->type) | |
329 | return sdata_table[i].hwmon_index; | |
330 | } | |
fcaf57b6 CLG |
331 | return ++sensor_groups[sdata->type].hwmon_index; |
332 | } | |
333 | ||
e0da9912 SB |
334 | static int init_sensor_group_data(struct platform_device *pdev, |
335 | struct platform_data *pdata) | |
336 | { | |
337 | struct sensor_group_data *sgrp_data; | |
338 | struct device_node *groups, *sgrp; | |
339 | int count = 0, ret = 0; | |
340 | enum sensors type; | |
341 | ||
342 | groups = of_find_compatible_node(NULL, NULL, "ibm,opal-sensor-group"); | |
343 | if (!groups) | |
344 | return ret; | |
345 | ||
346 | for_each_child_of_node(groups, sgrp) { | |
347 | type = get_sensor_type(sgrp); | |
348 | if (type != MAX_SENSOR_TYPE) | |
349 | pdata->nr_sensor_groups++; | |
350 | } | |
351 | ||
352 | if (!pdata->nr_sensor_groups) | |
353 | goto out; | |
354 | ||
355 | sgrp_data = devm_kcalloc(&pdev->dev, pdata->nr_sensor_groups, | |
356 | sizeof(*sgrp_data), GFP_KERNEL); | |
357 | if (!sgrp_data) { | |
358 | ret = -ENOMEM; | |
359 | goto out; | |
360 | } | |
361 | ||
362 | for_each_child_of_node(groups, sgrp) { | |
363 | u32 gid; | |
364 | ||
365 | type = get_sensor_type(sgrp); | |
366 | if (type == MAX_SENSOR_TYPE) | |
367 | continue; | |
368 | ||
369 | if (of_property_read_u32(sgrp, "sensor-group-id", &gid)) | |
370 | continue; | |
371 | ||
372 | if (of_count_phandle_with_args(sgrp, "sensors", NULL) <= 0) | |
373 | continue; | |
374 | ||
375 | sensor_groups[type].attr_count++; | |
376 | sgrp_data[count].gid = gid; | |
377 | mutex_init(&sgrp_data[count].mutex); | |
378 | sgrp_data[count++].enable = false; | |
379 | } | |
380 | ||
381 | pdata->sgrp_data = sgrp_data; | |
382 | out: | |
383 | of_node_put(groups); | |
384 | return ret; | |
385 | } | |
386 | ||
387 | static struct sensor_group_data *get_sensor_group(struct platform_data *pdata, | |
388 | struct device_node *node, | |
389 | enum sensors gtype) | |
390 | { | |
391 | struct sensor_group_data *sgrp_data = pdata->sgrp_data; | |
392 | struct device_node *groups, *sgrp; | |
393 | ||
394 | groups = of_find_compatible_node(NULL, NULL, "ibm,opal-sensor-group"); | |
395 | if (!groups) | |
396 | return NULL; | |
397 | ||
398 | for_each_child_of_node(groups, sgrp) { | |
399 | struct of_phandle_iterator it; | |
400 | u32 gid; | |
401 | int rc, i; | |
402 | enum sensors type; | |
403 | ||
404 | type = get_sensor_type(sgrp); | |
405 | if (type != gtype) | |
406 | continue; | |
407 | ||
408 | if (of_property_read_u32(sgrp, "sensor-group-id", &gid)) | |
409 | continue; | |
410 | ||
411 | of_for_each_phandle(&it, rc, sgrp, "sensors", NULL, 0) | |
412 | if (it.phandle == node->phandle) { | |
413 | of_node_put(it.node); | |
414 | break; | |
415 | } | |
416 | ||
417 | if (rc) | |
418 | continue; | |
419 | ||
420 | for (i = 0; i < pdata->nr_sensor_groups; i++) | |
421 | if (gid == sgrp_data[i].gid) { | |
422 | of_node_put(sgrp); | |
423 | of_node_put(groups); | |
424 | return &sgrp_data[i]; | |
425 | } | |
426 | } | |
427 | ||
428 | of_node_put(groups); | |
429 | return NULL; | |
430 | } | |
431 | ||
8de303ba | 432 | static int populate_attr_groups(struct platform_device *pdev) |
24c1aa85 NG |
433 | { |
434 | struct platform_data *pdata = platform_get_drvdata(pdev); | |
435 | const struct attribute_group **pgroups = pdata->attr_groups; | |
436 | struct device_node *opal, *np; | |
437 | enum sensors type; | |
e0da9912 SB |
438 | int ret; |
439 | ||
440 | ret = init_sensor_group_data(pdev, pdata); | |
441 | if (ret) | |
442 | return ret; | |
24c1aa85 NG |
443 | |
444 | opal = of_find_node_by_path("/ibm,opal/sensors"); | |
24c1aa85 | 445 | for_each_child_of_node(opal, np) { |
2bcd3787 CLG |
446 | const char *label; |
447 | ||
c4ad4720 | 448 | type = get_sensor_type(np); |
2bcd3787 CLG |
449 | if (type == MAX_SENSOR_TYPE) |
450 | continue; | |
451 | ||
452 | sensor_groups[type].attr_count++; | |
453 | ||
454 | /* | |
996cf5a5 | 455 | * add attributes for labels, min and max |
2bcd3787 CLG |
456 | */ |
457 | if (!of_property_read_string(np, "label", &label)) | |
c4ad4720 | 458 | sensor_groups[type].attr_count++; |
996cf5a5 SB |
459 | if (of_find_property(np, "sensor-data-min", NULL)) |
460 | sensor_groups[type].attr_count++; | |
461 | if (of_find_property(np, "sensor-data-max", NULL)) | |
462 | sensor_groups[type].attr_count++; | |
24c1aa85 NG |
463 | } |
464 | ||
465 | of_node_put(opal); | |
466 | ||
467 | for (type = 0; type < MAX_SENSOR_TYPE; type++) { | |
a86854d0 KC |
468 | sensor_groups[type].group.attrs = devm_kcalloc(&pdev->dev, |
469 | sensor_groups[type].attr_count + 1, | |
470 | sizeof(struct attribute *), | |
24c1aa85 NG |
471 | GFP_KERNEL); |
472 | if (!sensor_groups[type].group.attrs) | |
473 | return -ENOMEM; | |
474 | ||
475 | pgroups[type] = &sensor_groups[type].group; | |
476 | pdata->sensors_count += sensor_groups[type].attr_count; | |
477 | sensor_groups[type].attr_count = 0; | |
478 | } | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
9e4f74b1 CLG |
483 | static void create_hwmon_attr(struct sensor_data *sdata, const char *attr_name, |
484 | ssize_t (*show)(struct device *dev, | |
485 | struct device_attribute *attr, | |
e0da9912 SB |
486 | char *buf), |
487 | ssize_t (*store)(struct device *dev, | |
488 | struct device_attribute *attr, | |
489 | const char *buf, size_t count)) | |
9e4f74b1 CLG |
490 | { |
491 | snprintf(sdata->name, MAX_ATTR_LEN, "%s%d_%s", | |
492 | sensor_groups[sdata->type].name, sdata->hwmon_index, | |
493 | attr_name); | |
494 | ||
495 | sysfs_attr_init(&sdata->dev_attr.attr); | |
496 | sdata->dev_attr.attr.name = sdata->name; | |
9e4f74b1 | 497 | sdata->dev_attr.show = show; |
e0da9912 SB |
498 | if (store) { |
499 | sdata->dev_attr.store = store; | |
500 | sdata->dev_attr.attr.mode = 0664; | |
501 | } else { | |
502 | sdata->dev_attr.attr.mode = 0444; | |
503 | } | |
9e4f74b1 CLG |
504 | } |
505 | ||
996cf5a5 SB |
506 | static void populate_sensor(struct sensor_data *sdata, int od, int hd, int sid, |
507 | const char *attr_name, enum sensors type, | |
508 | const struct attribute_group *pgroup, | |
e0da9912 | 509 | struct sensor_group_data *sgrp_data, |
996cf5a5 SB |
510 | ssize_t (*show)(struct device *dev, |
511 | struct device_attribute *attr, | |
e0da9912 SB |
512 | char *buf), |
513 | ssize_t (*store)(struct device *dev, | |
514 | struct device_attribute *attr, | |
515 | const char *buf, size_t count)) | |
996cf5a5 SB |
516 | { |
517 | sdata->id = sid; | |
518 | sdata->type = type; | |
519 | sdata->opal_index = od; | |
520 | sdata->hwmon_index = hd; | |
e0da9912 | 521 | create_hwmon_attr(sdata, attr_name, show, store); |
996cf5a5 | 522 | pgroup->attrs[sensor_groups[type].attr_count++] = &sdata->dev_attr.attr; |
e0da9912 | 523 | sdata->sgrp_data = sgrp_data; |
996cf5a5 SB |
524 | } |
525 | ||
526 | static char *get_max_attr(enum sensors type) | |
527 | { | |
528 | switch (type) { | |
529 | case POWER_INPUT: | |
530 | return "input_highest"; | |
531 | default: | |
532 | return "highest"; | |
533 | } | |
534 | } | |
535 | ||
536 | static char *get_min_attr(enum sensors type) | |
537 | { | |
538 | switch (type) { | |
539 | case POWER_INPUT: | |
540 | return "input_lowest"; | |
541 | default: | |
542 | return "lowest"; | |
543 | } | |
544 | } | |
545 | ||
24c1aa85 NG |
546 | /* |
547 | * Iterate through the device tree for each child of 'sensors' node, create | |
548 | * a sysfs attribute file, the file is named by translating the DT node name | |
549 | * to the name required by the higher 'hwmon' driver like fan1_input, temp1_max | |
550 | * etc.. | |
551 | */ | |
8de303ba | 552 | static int create_device_attrs(struct platform_device *pdev) |
24c1aa85 NG |
553 | { |
554 | struct platform_data *pdata = platform_get_drvdata(pdev); | |
555 | const struct attribute_group **pgroups = pdata->attr_groups; | |
556 | struct device_node *opal, *np; | |
557 | struct sensor_data *sdata; | |
24c1aa85 | 558 | u32 count = 0; |
e0da9912 | 559 | u32 group_attr_id[MAX_SENSOR_TYPE] = {0}; |
24c1aa85 | 560 | |
a86854d0 KC |
561 | sdata = devm_kcalloc(&pdev->dev, |
562 | pdata->sensors_count, sizeof(*sdata), | |
24c1aa85 | 563 | GFP_KERNEL); |
e0da9912 SB |
564 | if (!sdata) |
565 | return -ENOMEM; | |
24c1aa85 | 566 | |
e0da9912 | 567 | opal = of_find_node_by_path("/ibm,opal/sensors"); |
24c1aa85 | 568 | for_each_child_of_node(opal, np) { |
e0da9912 | 569 | struct sensor_group_data *sgrp_data; |
f9f54f16 | 570 | const char *attr_name; |
e0da9912 SB |
571 | u32 opal_index, hw_id; |
572 | u32 sensor_id; | |
2bcd3787 | 573 | const char *label; |
e0da9912 | 574 | enum sensors type; |
f9f54f16 | 575 | |
c4ad4720 | 576 | type = get_sensor_type(np); |
24c1aa85 NG |
577 | if (type == MAX_SENSOR_TYPE) |
578 | continue; | |
579 | ||
14681637 CLG |
580 | /* |
581 | * Newer device trees use a "sensor-data" property | |
582 | * name for input. | |
583 | */ | |
584 | if (of_property_read_u32(np, "sensor-id", &sensor_id) && | |
585 | of_property_read_u32(np, "sensor-data", &sensor_id)) { | |
24c1aa85 | 586 | dev_info(&pdev->dev, |
0debe4d0 RH |
587 | "'sensor-id' missing in the node '%pOFn'\n", |
588 | np); | |
24c1aa85 NG |
589 | continue; |
590 | } | |
591 | ||
18d03f3c | 592 | sdata[count].id = sensor_id; |
24c1aa85 | 593 | sdata[count].type = type; |
f9f54f16 | 594 | |
14681637 CLG |
595 | /* |
596 | * If we can not parse the node name, it means we are | |
597 | * running on a newer device tree. We can just forget | |
598 | * about the OPAL index and use a defaut value for the | |
599 | * hwmon attribute name | |
600 | */ | |
f9f54f16 CLG |
601 | attr_name = parse_opal_node_name(np->name, type, &opal_index); |
602 | if (IS_ERR(attr_name)) { | |
14681637 CLG |
603 | attr_name = "input"; |
604 | opal_index = INVALID_INDEX; | |
f9f54f16 CLG |
605 | } |
606 | ||
e0da9912 SB |
607 | hw_id = get_sensor_hwmon_index(&sdata[count], sdata, count); |
608 | sgrp_data = get_sensor_group(pdata, np, type); | |
609 | populate_sensor(&sdata[count], opal_index, hw_id, sensor_id, | |
610 | attr_name, type, pgroups[type], sgrp_data, | |
611 | show_sensor, NULL); | |
612 | count++; | |
2bcd3787 CLG |
613 | |
614 | if (!of_property_read_string(np, "label", &label)) { | |
615 | /* | |
616 | * For the label attribute, we can reuse the | |
617 | * "properties" of the previous "input" | |
618 | * attribute. They are related to the same | |
619 | * sensor. | |
620 | */ | |
2bcd3787 CLG |
621 | |
622 | make_sensor_label(np, &sdata[count], label); | |
e0da9912 | 623 | populate_sensor(&sdata[count], opal_index, hw_id, |
996cf5a5 | 624 | sensor_id, "label", type, pgroups[type], |
e0da9912 | 625 | NULL, show_label, NULL); |
996cf5a5 SB |
626 | count++; |
627 | } | |
2bcd3787 | 628 | |
996cf5a5 SB |
629 | if (!of_property_read_u32(np, "sensor-data-max", &sensor_id)) { |
630 | attr_name = get_max_attr(type); | |
e0da9912 | 631 | populate_sensor(&sdata[count], opal_index, hw_id, |
996cf5a5 | 632 | sensor_id, attr_name, type, |
e0da9912 SB |
633 | pgroups[type], sgrp_data, show_sensor, |
634 | NULL); | |
996cf5a5 SB |
635 | count++; |
636 | } | |
2bcd3787 | 637 | |
996cf5a5 SB |
638 | if (!of_property_read_u32(np, "sensor-data-min", &sensor_id)) { |
639 | attr_name = get_min_attr(type); | |
e0da9912 | 640 | populate_sensor(&sdata[count], opal_index, hw_id, |
996cf5a5 | 641 | sensor_id, attr_name, type, |
e0da9912 SB |
642 | pgroups[type], sgrp_data, show_sensor, |
643 | NULL); | |
644 | count++; | |
645 | } | |
646 | ||
647 | if (sgrp_data && !sgrp_data->enable) { | |
648 | sgrp_data->enable = true; | |
649 | hw_id = ++group_attr_id[type]; | |
650 | populate_sensor(&sdata[count], opal_index, hw_id, | |
651 | sgrp_data->gid, "enable", type, | |
652 | pgroups[type], sgrp_data, show_enable, | |
653 | store_enable); | |
996cf5a5 | 654 | count++; |
2bcd3787 | 655 | } |
24c1aa85 NG |
656 | } |
657 | ||
24c1aa85 | 658 | of_node_put(opal); |
e0da9912 | 659 | return 0; |
24c1aa85 NG |
660 | } |
661 | ||
8de303ba | 662 | static int ibmpowernv_probe(struct platform_device *pdev) |
24c1aa85 NG |
663 | { |
664 | struct platform_data *pdata; | |
665 | struct device *hwmon_dev; | |
666 | int err; | |
667 | ||
668 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
669 | if (!pdata) | |
670 | return -ENOMEM; | |
671 | ||
672 | platform_set_drvdata(pdev, pdata); | |
673 | pdata->sensors_count = 0; | |
e0da9912 | 674 | pdata->nr_sensor_groups = 0; |
24c1aa85 NG |
675 | err = populate_attr_groups(pdev); |
676 | if (err) | |
677 | return err; | |
678 | ||
679 | /* Create sysfs attribute data for each sensor found in the DT */ | |
680 | err = create_device_attrs(pdev); | |
681 | if (err) | |
682 | return err; | |
683 | ||
684 | /* Finally, register with hwmon */ | |
685 | hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, DRVNAME, | |
686 | pdata, | |
687 | pdata->attr_groups); | |
688 | ||
689 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
690 | } | |
691 | ||
8de303ba NG |
692 | static const struct platform_device_id opal_sensor_driver_ids[] = { |
693 | { | |
694 | .name = "opal-sensor", | |
695 | }, | |
696 | { } | |
697 | }; | |
698 | MODULE_DEVICE_TABLE(platform, opal_sensor_driver_ids); | |
699 | ||
0b056b29 CLG |
700 | static const struct of_device_id opal_sensor_match[] = { |
701 | { .compatible = "ibm,opal-sensor" }, | |
702 | { }, | |
703 | }; | |
704 | MODULE_DEVICE_TABLE(of, opal_sensor_match); | |
705 | ||
24c1aa85 | 706 | static struct platform_driver ibmpowernv_driver = { |
8de303ba NG |
707 | .probe = ibmpowernv_probe, |
708 | .id_table = opal_sensor_driver_ids, | |
709 | .driver = { | |
8de303ba | 710 | .name = DRVNAME, |
0b056b29 | 711 | .of_match_table = opal_sensor_match, |
24c1aa85 NG |
712 | }, |
713 | }; | |
714 | ||
3bdec670 | 715 | module_platform_driver(ibmpowernv_driver); |
24c1aa85 NG |
716 | |
717 | MODULE_AUTHOR("Neelesh Gupta <neelegup@linux.vnet.ibm.com>"); | |
718 | MODULE_DESCRIPTION("IBM POWERNV platform sensors"); | |
719 | MODULE_LICENSE("GPL"); |