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1// SPDX-License-Identifier: GPL-2.0-or-later
2/***************************************************************************
3 * Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> *
4 * *
5 ***************************************************************************/
6
7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9#include <linux/bits.h>
10#include <linux/minmax.h>
11#include <linux/module.h>
12#include <linux/mod_devicetable.h>
13#include <linux/pm.h>
14#include <linux/init.h>
15#include <linux/regmap.h>
16#include <linux/slab.h>
17#include <linux/jiffies.h>
18#include <linux/platform_device.h>
19#include <linux/hwmon.h>
20#include <linux/err.h>
21#include <linux/mutex.h>
22#include "sch56xx-common.h"
23
24#define DRVNAME "sch5627"
25#define DEVNAME DRVNAME /* We only support one model */
26
27#define SCH5627_HWMON_ID 0xa5
28#define SCH5627_COMPANY_ID 0x5c
29#define SCH5627_PRIMARY_ID 0xa0
30
31#define SCH5627_REG_BUILD_CODE 0x39
32#define SCH5627_REG_BUILD_ID 0x3a
33#define SCH5627_REG_HWMON_ID 0x3c
34#define SCH5627_REG_HWMON_REV 0x3d
35#define SCH5627_REG_COMPANY_ID 0x3e
36#define SCH5627_REG_PRIMARY_ID 0x3f
37#define SCH5627_REG_CTRL 0x40
38
39#define SCH5627_CTRL_START BIT(0)
40#define SCH5627_CTRL_LOCK BIT(1)
41#define SCH5627_CTRL_VBAT BIT(4)
42
43#define SCH5627_NO_TEMPS 8
44#define SCH5627_NO_FANS 4
45#define SCH5627_NO_IN 5
46
47static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
48 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
49static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
50 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
51static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
52 0, 0, 1, 1, 0, 0, 0, 1 };
53static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
54 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
55static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
56 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
57
58static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
59 0x2C, 0x2E, 0x30, 0x32 };
60static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
61 0x62, 0x64, 0x66, 0x68 };
62
63static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = {
64 0xA0, 0xA1, 0xA2, 0xA3 };
65
66static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
67 0x22, 0x23, 0x24, 0x25, 0x189 };
68static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
69 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
70static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
71 1, 0, 1, 0, 1 };
72static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
73 10745, 3660, 9765, 10745, 3660 };
74static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
75 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
76
77struct sch5627_data {
78 struct regmap *regmap;
79 unsigned short addr;
80 u8 control;
81
82 struct mutex update_lock;
83 unsigned long last_battery; /* In jiffies */
84 char temp_valid; /* !=0 if following fields are valid */
85 char fan_valid;
86 char in_valid;
87 unsigned long temp_last_updated; /* In jiffies */
88 unsigned long fan_last_updated;
89 unsigned long in_last_updated;
90 u16 temp[SCH5627_NO_TEMPS];
91 u16 fan[SCH5627_NO_FANS];
92 u16 in[SCH5627_NO_IN];
93};
94
95static const struct regmap_range sch5627_tunables_ranges[] = {
96 regmap_reg_range(0x57, 0x57),
97 regmap_reg_range(0x59, 0x59),
98 regmap_reg_range(0x5B, 0x5B),
99 regmap_reg_range(0x5D, 0x5D),
100 regmap_reg_range(0x5F, 0x5F),
101 regmap_reg_range(0x61, 0x69),
102 regmap_reg_range(0x96, 0x9B),
103 regmap_reg_range(0xA0, 0xA3),
104 regmap_reg_range(0x184, 0x184),
105 regmap_reg_range(0x186, 0x186),
106 regmap_reg_range(0x1A8, 0x1A9),
107};
108
109static const struct regmap_access_table sch5627_tunables_table = {
110 .yes_ranges = sch5627_tunables_ranges,
111 .n_yes_ranges = ARRAY_SIZE(sch5627_tunables_ranges),
112};
113
114static const struct regmap_config sch5627_regmap_config = {
115 .reg_bits = 16,
116 .val_bits = 8,
117 .wr_table = &sch5627_tunables_table,
118 .rd_table = &sch5627_tunables_table,
119 .cache_type = REGCACHE_RBTREE,
120 .use_single_read = true,
121 .use_single_write = true,
122 .can_sleep = true,
123};
124
125static int sch5627_update_temp(struct sch5627_data *data)
126{
127 int ret = 0;
128 int i, val;
129
130 mutex_lock(&data->update_lock);
131
132 /* Cache the values for 1 second */
133 if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) {
134 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
135 val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
136 SCH5627_REG_TEMP_LSN[i],
137 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
138 if (unlikely(val < 0)) {
139 ret = val;
140 goto abort;
141 }
142 data->temp[i] = val;
143 }
144 data->temp_last_updated = jiffies;
145 data->temp_valid = 1;
146 }
147abort:
148 mutex_unlock(&data->update_lock);
149 return ret;
150}
151
152static int sch5627_update_fan(struct sch5627_data *data)
153{
154 int ret = 0;
155 int i, val;
156
157 mutex_lock(&data->update_lock);
158
159 /* Cache the values for 1 second */
160 if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) {
161 for (i = 0; i < SCH5627_NO_FANS; i++) {
162 val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
163 if (unlikely(val < 0)) {
164 ret = val;
165 goto abort;
166 }
167 data->fan[i] = val;
168 }
169 data->fan_last_updated = jiffies;
170 data->fan_valid = 1;
171 }
172abort:
173 mutex_unlock(&data->update_lock);
174 return ret;
175}
176
177static int sch5627_update_in(struct sch5627_data *data)
178{
179 int ret = 0;
180 int i, val;
181
182 mutex_lock(&data->update_lock);
183
184 /* Trigger a Vbat voltage measurement every 5 minutes */
185 if (time_after(jiffies, data->last_battery + 300 * HZ)) {
186 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
187 data->control | SCH5627_CTRL_VBAT);
188 data->last_battery = jiffies;
189 }
190
191 /* Cache the values for 1 second */
192 if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) {
193 for (i = 0; i < SCH5627_NO_IN; i++) {
194 val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
195 SCH5627_REG_IN_LSN[i],
196 SCH5627_REG_IN_HIGH_NIBBLE[i]);
197 if (unlikely(val < 0)) {
198 ret = val;
199 goto abort;
200 }
201 data->in[i] = val;
202 }
203 data->in_last_updated = jiffies;
204 data->in_valid = 1;
205 }
206abort:
207 mutex_unlock(&data->update_lock);
208 return ret;
209}
210
211static int reg_to_temp(u16 reg)
212{
213 return (reg * 625) / 10 - 64000;
214}
215
216static int reg_to_temp_limit(u8 reg)
217{
218 return (reg - 64) * 1000;
219}
220
221static int reg_to_rpm(u16 reg)
222{
223 if (reg == 0)
224 return -EIO;
225 if (reg == 0xffff)
226 return 0;
227
228 return 5400540 / reg;
229}
230
231static u8 sch5627_temp_limit_to_reg(long value)
232{
233 long limit = (value / 1000) + 64;
234
235 return clamp_val(limit, 0, U8_MAX);
236}
237
238static u16 sch5627_rpm_to_reg(long value)
239{
240 long pulses;
241
242 if (value <= 0)
243 return U16_MAX - 1;
244
245 pulses = 5400540 / value;
246
247 return clamp_val(pulses, 1, U16_MAX - 1);
248}
249
250static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
251 int channel)
252{
253 const struct sch5627_data *data = drvdata;
254
255 /* Once the lock bit is set, the virtual registers become read-only
256 * until the next power cycle.
257 */
258 if (data->control & SCH5627_CTRL_LOCK)
259 return 0444;
260
261 switch (type) {
262 case hwmon_temp:
263 switch (attr) {
264 case hwmon_temp_max:
265 case hwmon_temp_crit:
266 return 0644;
267 default:
268 break;
269 }
270 break;
271 case hwmon_fan:
272 switch (attr) {
273 case hwmon_fan_min:
274 return 0644;
275 default:
276 break;
277 }
278 break;
279 case hwmon_pwm:
280 switch (attr) {
281 case hwmon_pwm_auto_channels_temp:
282 return 0644;
283 default:
284 break;
285 }
286 break;
287 default:
288 break;
289 }
290
291 return 0444;
292}
293
294static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
295 long *val)
296{
297 struct sch5627_data *data = dev_get_drvdata(dev);
298 int ret, value;
299
300 switch (type) {
301 case hwmon_temp:
302 switch (attr) {
303 case hwmon_temp_input:
304 ret = sch5627_update_temp(data);
305 if (ret < 0)
306 return ret;
307
308 *val = reg_to_temp(data->temp[channel]);
309 return 0;
310 case hwmon_temp_max:
311 ret = regmap_read(data->regmap, SCH5627_REG_TEMP_ABS[channel], &value);
312 if (ret < 0)
313 return ret;
314
315 *val = reg_to_temp_limit((u8)value);
316 return 0;
317 case hwmon_temp_crit:
318 ret = regmap_read(data->regmap, SCH5627_REG_TEMP_HIGH[channel], &value);
319 if (ret < 0)
320 return ret;
321
322 *val = reg_to_temp_limit((u8)value);
323 return 0;
324 case hwmon_temp_fault:
325 ret = sch5627_update_temp(data);
326 if (ret < 0)
327 return ret;
328
329 *val = (data->temp[channel] == 0);
330 return 0;
331 default:
332 break;
333 }
334 break;
335 case hwmon_fan:
336 switch (attr) {
337 case hwmon_fan_input:
338 ret = sch5627_update_fan(data);
339 if (ret < 0)
340 return ret;
341
342 ret = reg_to_rpm(data->fan[channel]);
343 if (ret < 0)
344 return ret;
345
346 *val = ret;
347 return 0;
348 case hwmon_fan_min:
349 ret = sch56xx_regmap_read16(data->regmap, SCH5627_REG_FAN_MIN[channel],
350 &value);
351 if (ret < 0)
352 return ret;
353
354 ret = reg_to_rpm((u16)value);
355 if (ret < 0)
356 return ret;
357
358 *val = ret;
359 return 0;
360 case hwmon_fan_fault:
361 ret = sch5627_update_fan(data);
362 if (ret < 0)
363 return ret;
364
365 *val = (data->fan[channel] == 0xffff);
366 return 0;
367 default:
368 break;
369 }
370 break;
371 case hwmon_pwm:
372 switch (attr) {
373 case hwmon_pwm_auto_channels_temp:
374 ret = regmap_read(data->regmap, SCH5627_REG_PWM_MAP[channel], &value);
375 if (ret < 0)
376 return ret;
377
378 *val = value;
379 return 0;
380 default:
381 break;
382 }
383 break;
384 case hwmon_in:
385 ret = sch5627_update_in(data);
386 if (ret < 0)
387 return ret;
388 switch (attr) {
389 case hwmon_in_input:
390 *val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel],
391 10000);
392 return 0;
393 default:
394 break;
395 }
396 break;
397 default:
398 break;
399 }
400
401 return -EOPNOTSUPP;
402}
403
404static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
405 int channel, const char **str)
406{
407 switch (type) {
408 case hwmon_in:
409 switch (attr) {
410 case hwmon_in_label:
411 *str = SCH5627_IN_LABELS[channel];
412 return 0;
413 default:
414 break;
415 }
416 break;
417 default:
418 break;
419 }
420
421 return -EOPNOTSUPP;
422}
423
424static int sch5627_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
425 long val)
426{
427 struct sch5627_data *data = dev_get_drvdata(dev);
428 u16 fan;
429 u8 temp;
430
431 switch (type) {
432 case hwmon_temp:
433 temp = sch5627_temp_limit_to_reg(val);
434
435 switch (attr) {
436 case hwmon_temp_max:
437 return regmap_write(data->regmap, SCH5627_REG_TEMP_ABS[channel], temp);
438 case hwmon_temp_crit:
439 return regmap_write(data->regmap, SCH5627_REG_TEMP_HIGH[channel], temp);
440 default:
441 break;
442 }
443 break;
444 case hwmon_fan:
445 switch (attr) {
446 case hwmon_fan_min:
447 fan = sch5627_rpm_to_reg(val);
448
449 return sch56xx_regmap_write16(data->regmap, SCH5627_REG_FAN_MIN[channel],
450 fan);
451 default:
452 break;
453 }
454 break;
455 case hwmon_pwm:
456 switch (attr) {
457 case hwmon_pwm_auto_channels_temp:
458 /* registers are 8 bit wide */
459 if (val > U8_MAX || val < 0)
460 return -EINVAL;
461
462 return regmap_write(data->regmap, SCH5627_REG_PWM_MAP[channel], val);
463 default:
464 break;
465 }
466 break;
467 default:
468 break;
469 }
470
471 return -EOPNOTSUPP;
472}
473
474static const struct hwmon_ops sch5627_ops = {
475 .is_visible = sch5627_is_visible,
476 .read = sch5627_read,
477 .read_string = sch5627_read_string,
478 .write = sch5627_write,
479};
480
481static const struct hwmon_channel_info * const sch5627_info[] = {
482 HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
483 HWMON_CHANNEL_INFO(temp,
484 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
485 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
486 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
487 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
488 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
489 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
490 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
491 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT
492 ),
493 HWMON_CHANNEL_INFO(fan,
494 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
495 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
496 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
497 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT
498 ),
499 HWMON_CHANNEL_INFO(pwm,
500 HWMON_PWM_AUTO_CHANNELS_TEMP,
501 HWMON_PWM_AUTO_CHANNELS_TEMP,
502 HWMON_PWM_AUTO_CHANNELS_TEMP,
503 HWMON_PWM_AUTO_CHANNELS_TEMP
504 ),
505 HWMON_CHANNEL_INFO(in,
506 HWMON_I_INPUT | HWMON_I_LABEL,
507 HWMON_I_INPUT | HWMON_I_LABEL,
508 HWMON_I_INPUT | HWMON_I_LABEL,
509 HWMON_I_INPUT | HWMON_I_LABEL,
510 HWMON_I_INPUT
511 ),
512 NULL
513};
514
515static const struct hwmon_chip_info sch5627_chip_info = {
516 .ops = &sch5627_ops,
517 .info = sch5627_info,
518};
519
520static int sch5627_probe(struct platform_device *pdev)
521{
522 struct sch5627_data *data;
523 struct device *hwmon_dev;
524 int build_code, build_id, hwmon_rev, val;
525
526 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
527 GFP_KERNEL);
528 if (!data)
529 return -ENOMEM;
530
531 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
532 mutex_init(&data->update_lock);
533 platform_set_drvdata(pdev, data);
534
535 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
536 if (val < 0)
537 return val;
538
539 if (val != SCH5627_HWMON_ID) {
540 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
541 val, SCH5627_HWMON_ID);
542 return -ENODEV;
543 }
544
545 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
546 if (val < 0)
547 return val;
548
549 if (val != SCH5627_COMPANY_ID) {
550 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
551 val, SCH5627_COMPANY_ID);
552 return -ENODEV;
553 }
554
555 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
556 if (val < 0)
557 return val;
558
559 if (val != SCH5627_PRIMARY_ID) {
560 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
561 val, SCH5627_PRIMARY_ID);
562 return -ENODEV;
563 }
564
565 build_code = sch56xx_read_virtual_reg(data->addr,
566 SCH5627_REG_BUILD_CODE);
567 if (build_code < 0)
568 return build_code;
569
570 build_id = sch56xx_read_virtual_reg16(data->addr,
571 SCH5627_REG_BUILD_ID);
572 if (build_id < 0)
573 return build_id;
574
575 hwmon_rev = sch56xx_read_virtual_reg(data->addr,
576 SCH5627_REG_HWMON_REV);
577 if (hwmon_rev < 0)
578 return hwmon_rev;
579
580 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
581 if (val < 0)
582 return val;
583
584 data->control = val;
585 if (!(data->control & SCH5627_CTRL_START)) {
586 pr_err("hardware monitoring not enabled\n");
587 return -ENODEV;
588 }
589
590 data->regmap = devm_regmap_init_sch56xx(&pdev->dev, &data->update_lock, data->addr,
591 &sch5627_regmap_config);
592 if (IS_ERR(data->regmap))
593 return PTR_ERR(data->regmap);
594
595 /* Trigger a Vbat voltage measurement, so that we get a valid reading
596 the first time we read Vbat */
597 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | SCH5627_CTRL_VBAT);
598 data->last_battery = jiffies;
599
600 pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
601 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
602 build_code, build_id, hwmon_rev);
603
604 hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
605 &sch5627_chip_info, NULL);
606 if (IS_ERR(hwmon_dev))
607 return PTR_ERR(hwmon_dev);
608
609 /* Note failing to register the watchdog is not a fatal error */
610 sch56xx_watchdog_register(&pdev->dev, data->addr,
611 (build_code << 24) | (build_id << 8) | hwmon_rev,
612 &data->update_lock, 1);
613
614 return 0;
615}
616
617static int sch5627_suspend(struct device *dev)
618{
619 struct sch5627_data *data = dev_get_drvdata(dev);
620
621 regcache_cache_only(data->regmap, true);
622 regcache_mark_dirty(data->regmap);
623
624 return 0;
625}
626
627static int sch5627_resume(struct device *dev)
628{
629 struct sch5627_data *data = dev_get_drvdata(dev);
630
631 regcache_cache_only(data->regmap, false);
632 /* We must not access the virtual registers when the lock bit is set */
633 if (data->control & SCH5627_CTRL_LOCK)
634 return regcache_drop_region(data->regmap, 0, U16_MAX);
635
636 return regcache_sync(data->regmap);
637}
638
639static DEFINE_SIMPLE_DEV_PM_OPS(sch5627_dev_pm_ops, sch5627_suspend, sch5627_resume);
640
641static const struct platform_device_id sch5627_device_id[] = {
642 {
643 .name = "sch5627",
644 },
645 { }
646};
647MODULE_DEVICE_TABLE(platform, sch5627_device_id);
648
649static struct platform_driver sch5627_driver = {
650 .driver = {
651 .name = DRVNAME,
652 .pm = pm_sleep_ptr(&sch5627_dev_pm_ops),
653 },
654 .probe = sch5627_probe,
655 .id_table = sch5627_device_id,
656};
657
658module_platform_driver(sch5627_driver);
659
660MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
661MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
662MODULE_LICENSE("GPL");
1/***************************************************************************
2 * Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> *
3 * *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
8 * *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
13 * *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
19
20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/jiffies.h>
26#include <linux/platform_device.h>
27#include <linux/hwmon.h>
28#include <linux/hwmon-sysfs.h>
29#include <linux/err.h>
30#include <linux/mutex.h>
31#include "sch56xx-common.h"
32
33#define DRVNAME "sch5627"
34#define DEVNAME DRVNAME /* We only support one model */
35
36#define SCH5627_HWMON_ID 0xa5
37#define SCH5627_COMPANY_ID 0x5c
38#define SCH5627_PRIMARY_ID 0xa0
39
40#define SCH5627_REG_BUILD_CODE 0x39
41#define SCH5627_REG_BUILD_ID 0x3a
42#define SCH5627_REG_HWMON_ID 0x3c
43#define SCH5627_REG_HWMON_REV 0x3d
44#define SCH5627_REG_COMPANY_ID 0x3e
45#define SCH5627_REG_PRIMARY_ID 0x3f
46#define SCH5627_REG_CTRL 0x40
47
48#define SCH5627_NO_TEMPS 8
49#define SCH5627_NO_FANS 4
50#define SCH5627_NO_IN 5
51
52static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
53 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
54static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
55 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
56static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
57 0, 0, 1, 1, 0, 0, 0, 1 };
58static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
59 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
60static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
61 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
62
63static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
64 0x2C, 0x2E, 0x30, 0x32 };
65static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
66 0x62, 0x64, 0x66, 0x68 };
67
68static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
69 0x22, 0x23, 0x24, 0x25, 0x189 };
70static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
71 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
72static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
73 1, 0, 1, 0, 1 };
74static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
75 10745, 3660, 9765, 10745, 3660 };
76static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
77 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
78
79struct sch5627_data {
80 unsigned short addr;
81 struct device *hwmon_dev;
82 struct sch56xx_watchdog_data *watchdog;
83 u8 control;
84 u8 temp_max[SCH5627_NO_TEMPS];
85 u8 temp_crit[SCH5627_NO_TEMPS];
86 u16 fan_min[SCH5627_NO_FANS];
87
88 struct mutex update_lock;
89 unsigned long last_battery; /* In jiffies */
90 char valid; /* !=0 if following fields are valid */
91 unsigned long last_updated; /* In jiffies */
92 u16 temp[SCH5627_NO_TEMPS];
93 u16 fan[SCH5627_NO_FANS];
94 u16 in[SCH5627_NO_IN];
95};
96
97static struct sch5627_data *sch5627_update_device(struct device *dev)
98{
99 struct sch5627_data *data = dev_get_drvdata(dev);
100 struct sch5627_data *ret = data;
101 int i, val;
102
103 mutex_lock(&data->update_lock);
104
105 /* Trigger a Vbat voltage measurement every 5 minutes */
106 if (time_after(jiffies, data->last_battery + 300 * HZ)) {
107 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
108 data->control | 0x10);
109 data->last_battery = jiffies;
110 }
111
112 /* Cache the values for 1 second */
113 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
114 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
115 val = sch56xx_read_virtual_reg12(data->addr,
116 SCH5627_REG_TEMP_MSB[i],
117 SCH5627_REG_TEMP_LSN[i],
118 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
119 if (unlikely(val < 0)) {
120 ret = ERR_PTR(val);
121 goto abort;
122 }
123 data->temp[i] = val;
124 }
125
126 for (i = 0; i < SCH5627_NO_FANS; i++) {
127 val = sch56xx_read_virtual_reg16(data->addr,
128 SCH5627_REG_FAN[i]);
129 if (unlikely(val < 0)) {
130 ret = ERR_PTR(val);
131 goto abort;
132 }
133 data->fan[i] = val;
134 }
135
136 for (i = 0; i < SCH5627_NO_IN; i++) {
137 val = sch56xx_read_virtual_reg12(data->addr,
138 SCH5627_REG_IN_MSB[i],
139 SCH5627_REG_IN_LSN[i],
140 SCH5627_REG_IN_HIGH_NIBBLE[i]);
141 if (unlikely(val < 0)) {
142 ret = ERR_PTR(val);
143 goto abort;
144 }
145 data->in[i] = val;
146 }
147
148 data->last_updated = jiffies;
149 data->valid = 1;
150 }
151abort:
152 mutex_unlock(&data->update_lock);
153 return ret;
154}
155
156static int sch5627_read_limits(struct sch5627_data *data)
157{
158 int i, val;
159
160 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
161 /*
162 * Note what SMSC calls ABS, is what lm_sensors calls max
163 * (aka high), and HIGH is what lm_sensors calls crit.
164 */
165 val = sch56xx_read_virtual_reg(data->addr,
166 SCH5627_REG_TEMP_ABS[i]);
167 if (val < 0)
168 return val;
169 data->temp_max[i] = val;
170
171 val = sch56xx_read_virtual_reg(data->addr,
172 SCH5627_REG_TEMP_HIGH[i]);
173 if (val < 0)
174 return val;
175 data->temp_crit[i] = val;
176 }
177 for (i = 0; i < SCH5627_NO_FANS; i++) {
178 val = sch56xx_read_virtual_reg16(data->addr,
179 SCH5627_REG_FAN_MIN[i]);
180 if (val < 0)
181 return val;
182 data->fan_min[i] = val;
183 }
184
185 return 0;
186}
187
188static int reg_to_temp(u16 reg)
189{
190 return (reg * 625) / 10 - 64000;
191}
192
193static int reg_to_temp_limit(u8 reg)
194{
195 return (reg - 64) * 1000;
196}
197
198static int reg_to_rpm(u16 reg)
199{
200 if (reg == 0)
201 return -EIO;
202 if (reg == 0xffff)
203 return 0;
204
205 return 5400540 / reg;
206}
207
208static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
209 char *buf)
210{
211 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
212}
213
214static ssize_t show_temp(struct device *dev, struct device_attribute
215 *devattr, char *buf)
216{
217 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
218 struct sch5627_data *data = sch5627_update_device(dev);
219 int val;
220
221 if (IS_ERR(data))
222 return PTR_ERR(data);
223
224 val = reg_to_temp(data->temp[attr->index]);
225 return snprintf(buf, PAGE_SIZE, "%d\n", val);
226}
227
228static ssize_t show_temp_fault(struct device *dev, struct device_attribute
229 *devattr, char *buf)
230{
231 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
232 struct sch5627_data *data = sch5627_update_device(dev);
233
234 if (IS_ERR(data))
235 return PTR_ERR(data);
236
237 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
238}
239
240static ssize_t show_temp_max(struct device *dev, struct device_attribute
241 *devattr, char *buf)
242{
243 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
244 struct sch5627_data *data = dev_get_drvdata(dev);
245 int val;
246
247 val = reg_to_temp_limit(data->temp_max[attr->index]);
248 return snprintf(buf, PAGE_SIZE, "%d\n", val);
249}
250
251static ssize_t show_temp_crit(struct device *dev, struct device_attribute
252 *devattr, char *buf)
253{
254 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
255 struct sch5627_data *data = dev_get_drvdata(dev);
256 int val;
257
258 val = reg_to_temp_limit(data->temp_crit[attr->index]);
259 return snprintf(buf, PAGE_SIZE, "%d\n", val);
260}
261
262static ssize_t show_fan(struct device *dev, struct device_attribute
263 *devattr, char *buf)
264{
265 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
266 struct sch5627_data *data = sch5627_update_device(dev);
267 int val;
268
269 if (IS_ERR(data))
270 return PTR_ERR(data);
271
272 val = reg_to_rpm(data->fan[attr->index]);
273 if (val < 0)
274 return val;
275
276 return snprintf(buf, PAGE_SIZE, "%d\n", val);
277}
278
279static ssize_t show_fan_fault(struct device *dev, struct device_attribute
280 *devattr, char *buf)
281{
282 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
283 struct sch5627_data *data = sch5627_update_device(dev);
284
285 if (IS_ERR(data))
286 return PTR_ERR(data);
287
288 return snprintf(buf, PAGE_SIZE, "%d\n",
289 data->fan[attr->index] == 0xffff);
290}
291
292static ssize_t show_fan_min(struct device *dev, struct device_attribute
293 *devattr, char *buf)
294{
295 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
296 struct sch5627_data *data = dev_get_drvdata(dev);
297 int val = reg_to_rpm(data->fan_min[attr->index]);
298 if (val < 0)
299 return val;
300
301 return snprintf(buf, PAGE_SIZE, "%d\n", val);
302}
303
304static ssize_t show_in(struct device *dev, struct device_attribute
305 *devattr, char *buf)
306{
307 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
308 struct sch5627_data *data = sch5627_update_device(dev);
309 int val;
310
311 if (IS_ERR(data))
312 return PTR_ERR(data);
313
314 val = DIV_ROUND_CLOSEST(
315 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
316 10000);
317 return snprintf(buf, PAGE_SIZE, "%d\n", val);
318}
319
320static ssize_t show_in_label(struct device *dev, struct device_attribute
321 *devattr, char *buf)
322{
323 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
324
325 return snprintf(buf, PAGE_SIZE, "%s\n",
326 SCH5627_IN_LABELS[attr->index]);
327}
328
329static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
330static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
331static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
332static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
333static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
334static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
335static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
336static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
337static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
338static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
339static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
340static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
341static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
342static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
343static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
344static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
345static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
346static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
347static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
348static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
349static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
350static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
351static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
352static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
353static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
354static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
355static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
356static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
357static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
358static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
359static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
360static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
361static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
362
363static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
364static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
365static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
366static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
367static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
368static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
369static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
370static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
371static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
372static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
373static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
374static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
375
376static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
377static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
378static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
379static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
380static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
381static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
382static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
383static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
384static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
385
386static struct attribute *sch5627_attributes[] = {
387 &dev_attr_name.attr,
388
389 &sensor_dev_attr_temp1_input.dev_attr.attr,
390 &sensor_dev_attr_temp2_input.dev_attr.attr,
391 &sensor_dev_attr_temp3_input.dev_attr.attr,
392 &sensor_dev_attr_temp4_input.dev_attr.attr,
393 &sensor_dev_attr_temp5_input.dev_attr.attr,
394 &sensor_dev_attr_temp6_input.dev_attr.attr,
395 &sensor_dev_attr_temp7_input.dev_attr.attr,
396 &sensor_dev_attr_temp8_input.dev_attr.attr,
397 &sensor_dev_attr_temp1_fault.dev_attr.attr,
398 &sensor_dev_attr_temp2_fault.dev_attr.attr,
399 &sensor_dev_attr_temp3_fault.dev_attr.attr,
400 &sensor_dev_attr_temp4_fault.dev_attr.attr,
401 &sensor_dev_attr_temp5_fault.dev_attr.attr,
402 &sensor_dev_attr_temp6_fault.dev_attr.attr,
403 &sensor_dev_attr_temp7_fault.dev_attr.attr,
404 &sensor_dev_attr_temp8_fault.dev_attr.attr,
405 &sensor_dev_attr_temp1_max.dev_attr.attr,
406 &sensor_dev_attr_temp2_max.dev_attr.attr,
407 &sensor_dev_attr_temp3_max.dev_attr.attr,
408 &sensor_dev_attr_temp4_max.dev_attr.attr,
409 &sensor_dev_attr_temp5_max.dev_attr.attr,
410 &sensor_dev_attr_temp6_max.dev_attr.attr,
411 &sensor_dev_attr_temp7_max.dev_attr.attr,
412 &sensor_dev_attr_temp8_max.dev_attr.attr,
413 &sensor_dev_attr_temp1_crit.dev_attr.attr,
414 &sensor_dev_attr_temp2_crit.dev_attr.attr,
415 &sensor_dev_attr_temp3_crit.dev_attr.attr,
416 &sensor_dev_attr_temp4_crit.dev_attr.attr,
417 &sensor_dev_attr_temp5_crit.dev_attr.attr,
418 &sensor_dev_attr_temp6_crit.dev_attr.attr,
419 &sensor_dev_attr_temp7_crit.dev_attr.attr,
420 &sensor_dev_attr_temp8_crit.dev_attr.attr,
421
422 &sensor_dev_attr_fan1_input.dev_attr.attr,
423 &sensor_dev_attr_fan2_input.dev_attr.attr,
424 &sensor_dev_attr_fan3_input.dev_attr.attr,
425 &sensor_dev_attr_fan4_input.dev_attr.attr,
426 &sensor_dev_attr_fan1_fault.dev_attr.attr,
427 &sensor_dev_attr_fan2_fault.dev_attr.attr,
428 &sensor_dev_attr_fan3_fault.dev_attr.attr,
429 &sensor_dev_attr_fan4_fault.dev_attr.attr,
430 &sensor_dev_attr_fan1_min.dev_attr.attr,
431 &sensor_dev_attr_fan2_min.dev_attr.attr,
432 &sensor_dev_attr_fan3_min.dev_attr.attr,
433 &sensor_dev_attr_fan4_min.dev_attr.attr,
434
435 &sensor_dev_attr_in0_input.dev_attr.attr,
436 &sensor_dev_attr_in1_input.dev_attr.attr,
437 &sensor_dev_attr_in2_input.dev_attr.attr,
438 &sensor_dev_attr_in3_input.dev_attr.attr,
439 &sensor_dev_attr_in4_input.dev_attr.attr,
440 &sensor_dev_attr_in0_label.dev_attr.attr,
441 &sensor_dev_attr_in1_label.dev_attr.attr,
442 &sensor_dev_attr_in2_label.dev_attr.attr,
443 &sensor_dev_attr_in3_label.dev_attr.attr,
444 /* No in4_label as in4 is a generic input pin */
445
446 NULL
447};
448
449static const struct attribute_group sch5627_group = {
450 .attrs = sch5627_attributes,
451};
452
453static int sch5627_remove(struct platform_device *pdev)
454{
455 struct sch5627_data *data = platform_get_drvdata(pdev);
456
457 if (data->watchdog)
458 sch56xx_watchdog_unregister(data->watchdog);
459
460 if (data->hwmon_dev)
461 hwmon_device_unregister(data->hwmon_dev);
462
463 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
464
465 return 0;
466}
467
468static int sch5627_probe(struct platform_device *pdev)
469{
470 struct sch5627_data *data;
471 int err, build_code, build_id, hwmon_rev, val;
472
473 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
474 GFP_KERNEL);
475 if (!data)
476 return -ENOMEM;
477
478 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
479 mutex_init(&data->update_lock);
480 platform_set_drvdata(pdev, data);
481
482 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
483 if (val < 0) {
484 err = val;
485 goto error;
486 }
487 if (val != SCH5627_HWMON_ID) {
488 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
489 val, SCH5627_HWMON_ID);
490 err = -ENODEV;
491 goto error;
492 }
493
494 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
495 if (val < 0) {
496 err = val;
497 goto error;
498 }
499 if (val != SCH5627_COMPANY_ID) {
500 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
501 val, SCH5627_COMPANY_ID);
502 err = -ENODEV;
503 goto error;
504 }
505
506 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
507 if (val < 0) {
508 err = val;
509 goto error;
510 }
511 if (val != SCH5627_PRIMARY_ID) {
512 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
513 val, SCH5627_PRIMARY_ID);
514 err = -ENODEV;
515 goto error;
516 }
517
518 build_code = sch56xx_read_virtual_reg(data->addr,
519 SCH5627_REG_BUILD_CODE);
520 if (build_code < 0) {
521 err = build_code;
522 goto error;
523 }
524
525 build_id = sch56xx_read_virtual_reg16(data->addr,
526 SCH5627_REG_BUILD_ID);
527 if (build_id < 0) {
528 err = build_id;
529 goto error;
530 }
531
532 hwmon_rev = sch56xx_read_virtual_reg(data->addr,
533 SCH5627_REG_HWMON_REV);
534 if (hwmon_rev < 0) {
535 err = hwmon_rev;
536 goto error;
537 }
538
539 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
540 if (val < 0) {
541 err = val;
542 goto error;
543 }
544 data->control = val;
545 if (!(data->control & 0x01)) {
546 pr_err("hardware monitoring not enabled\n");
547 err = -ENODEV;
548 goto error;
549 }
550 /* Trigger a Vbat voltage measurement, so that we get a valid reading
551 the first time we read Vbat */
552 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
553 data->control | 0x10);
554 data->last_battery = jiffies;
555
556 /*
557 * Read limits, we do this only once as reading a register on
558 * the sch5627 is quite expensive (and they don't change).
559 */
560 err = sch5627_read_limits(data);
561 if (err)
562 goto error;
563
564 pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
565 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
566 build_code, build_id, hwmon_rev);
567
568 /* Register sysfs interface files */
569 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
570 if (err)
571 goto error;
572
573 data->hwmon_dev = hwmon_device_register(&pdev->dev);
574 if (IS_ERR(data->hwmon_dev)) {
575 err = PTR_ERR(data->hwmon_dev);
576 data->hwmon_dev = NULL;
577 goto error;
578 }
579
580 /* Note failing to register the watchdog is not a fatal error */
581 data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
582 (build_code << 24) | (build_id << 8) | hwmon_rev,
583 &data->update_lock, 1);
584
585 return 0;
586
587error:
588 sch5627_remove(pdev);
589 return err;
590}
591
592static struct platform_driver sch5627_driver = {
593 .driver = {
594 .name = DRVNAME,
595 },
596 .probe = sch5627_probe,
597 .remove = sch5627_remove,
598};
599
600module_platform_driver(sch5627_driver);
601
602MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
603MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
604MODULE_LICENSE("GPL");