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 | |
47 | static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = { |
48 | 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 }; |
49 | static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = { |
50 | 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 }; |
51 | static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = { |
52 | 0, 0, 1, 1, 0, 0, 0, 1 }; |
53 | static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = { |
54 | 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 }; |
55 | static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = { |
56 | 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 }; |
57 | |
58 | static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = { |
59 | 0x2C, 0x2E, 0x30, 0x32 }; |
60 | static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = { |
61 | 0x62, 0x64, 0x66, 0x68 }; |
62 | |
63 | static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = { |
64 | 0xA0, 0xA1, 0xA2, 0xA3 }; |
65 | |
66 | static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = { |
67 | 0x22, 0x23, 0x24, 0x25, 0x189 }; |
68 | static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = { |
69 | 0xE4, 0xE4, 0xE3, 0xE3, 0x18A }; |
70 | static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = { |
71 | 1, 0, 1, 0, 1 }; |
72 | static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = { |
73 | 10745, 3660, 9765, 10745, 3660 }; |
74 | static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = { |
75 | "VCC" , "VTT" , "VBAT" , "VTR" , "V_IN" }; |
76 | |
77 | struct 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 | |
95 | static 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 | |
109 | static 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 | |
114 | static 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_MAPLE, |
120 | .use_single_read = true, |
121 | .use_single_write = true, |
122 | .can_sleep = true, |
123 | }; |
124 | |
125 | static 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(addr: data->addr, msb_reg: SCH5627_REG_TEMP_MSB[i], |
136 | lsn_reg: SCH5627_REG_TEMP_LSN[i], |
137 | high_nibble: 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 | } |
147 | abort: |
148 | mutex_unlock(lock: &data->update_lock); |
149 | return ret; |
150 | } |
151 | |
152 | static 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(addr: data->addr, reg: 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 | } |
172 | abort: |
173 | mutex_unlock(lock: &data->update_lock); |
174 | return ret; |
175 | } |
176 | |
177 | static 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(addr: data->addr, SCH5627_REG_CTRL, |
187 | val: 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(addr: data->addr, msb_reg: SCH5627_REG_IN_MSB[i], |
195 | lsn_reg: SCH5627_REG_IN_LSN[i], |
196 | high_nibble: 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 | } |
206 | abort: |
207 | mutex_unlock(lock: &data->update_lock); |
208 | return ret; |
209 | } |
210 | |
211 | static int reg_to_temp(u16 reg) |
212 | { |
213 | return (reg * 625) / 10 - 64000; |
214 | } |
215 | |
216 | static int reg_to_temp_limit(u8 reg) |
217 | { |
218 | return (reg - 64) * 1000; |
219 | } |
220 | |
221 | static 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 | |
231 | static 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 | |
238 | static 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 | |
250 | static 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 | |
294 | static 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(reg: data->temp[channel]); |
309 | return 0; |
310 | case hwmon_temp_max: |
311 | ret = regmap_read(map: data->regmap, reg: SCH5627_REG_TEMP_ABS[channel], val: &value); |
312 | if (ret < 0) |
313 | return ret; |
314 | |
315 | *val = reg_to_temp_limit(reg: (u8)value); |
316 | return 0; |
317 | case hwmon_temp_crit: |
318 | ret = regmap_read(map: data->regmap, reg: SCH5627_REG_TEMP_HIGH[channel], val: &value); |
319 | if (ret < 0) |
320 | return ret; |
321 | |
322 | *val = reg_to_temp_limit(reg: (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(reg: 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(map: data->regmap, reg: SCH5627_REG_FAN_MIN[channel], |
350 | val: &value); |
351 | if (ret < 0) |
352 | return ret; |
353 | |
354 | ret = reg_to_rpm(reg: (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(map: data->regmap, reg: SCH5627_REG_PWM_MAP[channel], val: &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 | |
404 | static 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 | |
424 | static 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(value: val); |
434 | |
435 | switch (attr) { |
436 | case hwmon_temp_max: |
437 | return regmap_write(map: data->regmap, reg: SCH5627_REG_TEMP_ABS[channel], val: temp); |
438 | case hwmon_temp_crit: |
439 | return regmap_write(map: data->regmap, reg: SCH5627_REG_TEMP_HIGH[channel], val: 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(value: val); |
448 | |
449 | return sch56xx_regmap_write16(map: data->regmap, reg: SCH5627_REG_FAN_MIN[channel], |
450 | val: 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(map: data->regmap, reg: SCH5627_REG_PWM_MAP[channel], val); |
463 | default: |
464 | break; |
465 | } |
466 | break; |
467 | default: |
468 | break; |
469 | } |
470 | |
471 | return -EOPNOTSUPP; |
472 | } |
473 | |
474 | static 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 | |
481 | static 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 | |
515 | static const struct hwmon_chip_info sch5627_chip_info = { |
516 | .ops = &sch5627_ops, |
517 | .info = sch5627_info, |
518 | }; |
519 | |
520 | static 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(dev: &pdev->dev, size: 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(addr: 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(addr: 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(addr: 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(addr: data->addr, |
566 | SCH5627_REG_BUILD_CODE); |
567 | if (build_code < 0) |
568 | return build_code; |
569 | |
570 | build_id = sch56xx_read_virtual_reg16(addr: data->addr, |
571 | SCH5627_REG_BUILD_ID); |
572 | if (build_id < 0) |
573 | return build_id; |
574 | |
575 | hwmon_rev = sch56xx_read_virtual_reg(addr: data->addr, |
576 | SCH5627_REG_HWMON_REV); |
577 | if (hwmon_rev < 0) |
578 | return hwmon_rev; |
579 | |
580 | val = sch56xx_read_virtual_reg(addr: 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(dev: &pdev->dev, lock: &data->update_lock, addr: data->addr, |
591 | config: &sch5627_regmap_config); |
592 | if (IS_ERR(ptr: data->regmap)) |
593 | return PTR_ERR(ptr: 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(addr: data->addr, SCH5627_REG_CTRL, val: 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(dev: &pdev->dev, DEVNAME, drvdata: data, |
605 | info: &sch5627_chip_info, NULL); |
606 | if (IS_ERR(ptr: hwmon_dev)) |
607 | return PTR_ERR(ptr: hwmon_dev); |
608 | |
609 | /* Note failing to register the watchdog is not a fatal error */ |
610 | sch56xx_watchdog_register(parent: &pdev->dev, addr: data->addr, |
611 | revision: (build_code << 24) | (build_id << 8) | hwmon_rev, |
612 | io_lock: &data->update_lock, check_enabled: 1); |
613 | |
614 | return 0; |
615 | } |
616 | |
617 | static int sch5627_suspend(struct device *dev) |
618 | { |
619 | struct sch5627_data *data = dev_get_drvdata(dev); |
620 | |
621 | regcache_cache_only(map: data->regmap, enable: true); |
622 | regcache_mark_dirty(map: data->regmap); |
623 | |
624 | return 0; |
625 | } |
626 | |
627 | static int sch5627_resume(struct device *dev) |
628 | { |
629 | struct sch5627_data *data = dev_get_drvdata(dev); |
630 | |
631 | regcache_cache_only(map: data->regmap, enable: 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(map: data->regmap, min: 0, U16_MAX); |
635 | |
636 | return regcache_sync(map: data->regmap); |
637 | } |
638 | |
639 | static DEFINE_SIMPLE_DEV_PM_OPS(sch5627_dev_pm_ops, sch5627_suspend, sch5627_resume); |
640 | |
641 | static const struct platform_device_id sch5627_device_id[] = { |
642 | { |
643 | .name = "sch5627" , |
644 | }, |
645 | { } |
646 | }; |
647 | MODULE_DEVICE_TABLE(platform, sch5627_device_id); |
648 | |
649 | static 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 | |
658 | module_platform_driver(sch5627_driver); |
659 | |
660 | MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver" ); |
661 | MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>" ); |
662 | MODULE_LICENSE("GPL" ); |
663 | |