1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Hardware monitoring driver for UCD90xxx Sequencer and System Health
4 * Controller series
5 *
6 * Copyright (C) 2011 Ericsson AB.
7 */
8
9 #include <linux/debugfs.h>
10 #include <linux/delay.h>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/init.h>
15 #include <linux/err.h>
16 #include <linux/slab.h>
17 #include <linux/i2c.h>
18 #include <linux/pmbus.h>
19 #include <linux/gpio/driver.h>
20 #include <linux/timekeeping.h>
21 #include "pmbus.h"
22
23 enum chips { ucd9000, ucd90120, ucd90124, ucd90160, ucd90320, ucd9090,
24 ucd90910 };
25
26 #define UCD9000_MONITOR_CONFIG 0xd5
27 #define UCD9000_NUM_PAGES 0xd6
28 #define UCD9000_FAN_CONFIG_INDEX 0xe7
29 #define UCD9000_FAN_CONFIG 0xe8
30 #define UCD9000_MFR_STATUS 0xf3
31 #define UCD9000_GPIO_SELECT 0xfa
32 #define UCD9000_GPIO_CONFIG 0xfb
33 #define UCD9000_DEVICE_ID 0xfd
34
35 /* GPIO CONFIG bits */
36 #define UCD9000_GPIO_CONFIG_ENABLE BIT(0)
37 #define UCD9000_GPIO_CONFIG_OUT_ENABLE BIT(1)
38 #define UCD9000_GPIO_CONFIG_OUT_VALUE BIT(2)
39 #define UCD9000_GPIO_CONFIG_STATUS BIT(3)
40 #define UCD9000_GPIO_INPUT 0
41 #define UCD9000_GPIO_OUTPUT 1
42
43 #define UCD9000_MON_TYPE(x) (((x) >> 5) & 0x07)
44 #define UCD9000_MON_PAGE(x) ((x) & 0x1f)
45
46 #define UCD9000_MON_VOLTAGE 1
47 #define UCD9000_MON_TEMPERATURE 2
48 #define UCD9000_MON_CURRENT 3
49 #define UCD9000_MON_VOLTAGE_HW 4
50
51 #define UCD9000_NUM_FAN 4
52
53 #define UCD9000_GPIO_NAME_LEN 16
54 #define UCD9090_NUM_GPIOS 23
55 #define UCD901XX_NUM_GPIOS 26
56 #define UCD90320_NUM_GPIOS 84
57 #define UCD90910_NUM_GPIOS 26
58
59 #define UCD9000_DEBUGFS_NAME_LEN 24
60 #define UCD9000_GPI_COUNT 8
61 #define UCD90320_GPI_COUNT 32
62
63 struct ucd9000_data {
64 u8 fan_data[UCD9000_NUM_FAN][I2C_SMBUS_BLOCK_MAX];
65 struct pmbus_driver_info info;
66 #ifdef CONFIG_GPIOLIB
67 struct gpio_chip gpio;
68 #endif
69 struct dentry *debugfs;
70 ktime_t write_time;
71 };
72 #define to_ucd9000_data(_info) container_of(_info, struct ucd9000_data, info)
73
74 struct ucd9000_debugfs_entry {
75 struct i2c_client *client;
76 u8 index;
77 };
78
79 /*
80 * It has been observed that the UCD90320 randomly fails register access when
81 * doing another access right on the back of a register write. To mitigate this
82 * make sure that there is a minimum delay between a write access and the
83 * following access. The 250us is based on experimental data. At a delay of
84 * 200us the issue seems to go away. Add a bit of extra margin to allow for
85 * system to system differences.
86 */
87 #define UCD90320_WAIT_DELAY_US 250
88
ucd90320_wait(const struct ucd9000_data * data)89 static inline void ucd90320_wait(const struct ucd9000_data *data)
90 {
91 s64 delta = ktime_us_delta(ktime_get(), data->write_time);
92
93 if (delta < UCD90320_WAIT_DELAY_US)
94 udelay(UCD90320_WAIT_DELAY_US - delta);
95 }
96
ucd90320_read_word_data(struct i2c_client * client,int page,int phase,int reg)97 static int ucd90320_read_word_data(struct i2c_client *client, int page,
98 int phase, int reg)
99 {
100 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
101 struct ucd9000_data *data = to_ucd9000_data(info);
102
103 if (reg >= PMBUS_VIRT_BASE)
104 return -ENXIO;
105
106 ucd90320_wait(data);
107 return pmbus_read_word_data(client, page, phase, reg);
108 }
109
ucd90320_read_byte_data(struct i2c_client * client,int page,int reg)110 static int ucd90320_read_byte_data(struct i2c_client *client, int page, int reg)
111 {
112 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
113 struct ucd9000_data *data = to_ucd9000_data(info);
114
115 ucd90320_wait(data);
116 return pmbus_read_byte_data(client, page, reg);
117 }
118
ucd90320_write_word_data(struct i2c_client * client,int page,int reg,u16 word)119 static int ucd90320_write_word_data(struct i2c_client *client, int page,
120 int reg, u16 word)
121 {
122 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
123 struct ucd9000_data *data = to_ucd9000_data(info);
124 int ret;
125
126 ucd90320_wait(data);
127 ret = pmbus_write_word_data(client, page, reg, word);
128 data->write_time = ktime_get();
129
130 return ret;
131 }
132
ucd90320_write_byte(struct i2c_client * client,int page,u8 value)133 static int ucd90320_write_byte(struct i2c_client *client, int page, u8 value)
134 {
135 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
136 struct ucd9000_data *data = to_ucd9000_data(info);
137 int ret;
138
139 ucd90320_wait(data);
140 ret = pmbus_write_byte(client, page, value);
141 data->write_time = ktime_get();
142
143 return ret;
144 }
145
ucd9000_get_fan_config(struct i2c_client * client,int fan)146 static int ucd9000_get_fan_config(struct i2c_client *client, int fan)
147 {
148 int fan_config = 0;
149 struct ucd9000_data *data
150 = to_ucd9000_data(pmbus_get_driver_info(client));
151
152 if (data->fan_data[fan][3] & 1)
153 fan_config |= PB_FAN_2_INSTALLED; /* Use lower bit position */
154
155 /* Pulses/revolution */
156 fan_config |= (data->fan_data[fan][3] & 0x06) >> 1;
157
158 return fan_config;
159 }
160
ucd9000_read_byte_data(struct i2c_client * client,int page,int reg)161 static int ucd9000_read_byte_data(struct i2c_client *client, int page, int reg)
162 {
163 int ret = 0;
164 int fan_config;
165
166 switch (reg) {
167 case PMBUS_FAN_CONFIG_12:
168 if (page > 0)
169 return -ENXIO;
170
171 ret = ucd9000_get_fan_config(client, 0);
172 if (ret < 0)
173 return ret;
174 fan_config = ret << 4;
175 ret = ucd9000_get_fan_config(client, 1);
176 if (ret < 0)
177 return ret;
178 fan_config |= ret;
179 ret = fan_config;
180 break;
181 case PMBUS_FAN_CONFIG_34:
182 if (page > 0)
183 return -ENXIO;
184
185 ret = ucd9000_get_fan_config(client, 2);
186 if (ret < 0)
187 return ret;
188 fan_config = ret << 4;
189 ret = ucd9000_get_fan_config(client, 3);
190 if (ret < 0)
191 return ret;
192 fan_config |= ret;
193 ret = fan_config;
194 break;
195 default:
196 ret = -ENODATA;
197 break;
198 }
199 return ret;
200 }
201
202 static const struct i2c_device_id ucd9000_id[] = {
203 {"ucd9000", ucd9000},
204 {"ucd90120", ucd90120},
205 {"ucd90124", ucd90124},
206 {"ucd90160", ucd90160},
207 {"ucd90320", ucd90320},
208 {"ucd9090", ucd9090},
209 {"ucd90910", ucd90910},
210 {}
211 };
212 MODULE_DEVICE_TABLE(i2c, ucd9000_id);
213
214 static const struct of_device_id __maybe_unused ucd9000_of_match[] = {
215 {
216 .compatible = "ti,ucd9000",
217 .data = (void *)ucd9000
218 },
219 {
220 .compatible = "ti,ucd90120",
221 .data = (void *)ucd90120
222 },
223 {
224 .compatible = "ti,ucd90124",
225 .data = (void *)ucd90124
226 },
227 {
228 .compatible = "ti,ucd90160",
229 .data = (void *)ucd90160
230 },
231 {
232 .compatible = "ti,ucd90320",
233 .data = (void *)ucd90320
234 },
235 {
236 .compatible = "ti,ucd9090",
237 .data = (void *)ucd9090
238 },
239 {
240 .compatible = "ti,ucd90910",
241 .data = (void *)ucd90910
242 },
243 { },
244 };
245 MODULE_DEVICE_TABLE(of, ucd9000_of_match);
246
247 #ifdef CONFIG_GPIOLIB
ucd9000_gpio_read_config(struct i2c_client * client,unsigned int offset)248 static int ucd9000_gpio_read_config(struct i2c_client *client,
249 unsigned int offset)
250 {
251 int ret;
252
253 /* No page set required */
254 ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_SELECT, offset);
255 if (ret < 0)
256 return ret;
257
258 return i2c_smbus_read_byte_data(client, UCD9000_GPIO_CONFIG);
259 }
260
ucd9000_gpio_get(struct gpio_chip * gc,unsigned int offset)261 static int ucd9000_gpio_get(struct gpio_chip *gc, unsigned int offset)
262 {
263 struct i2c_client *client = gpiochip_get_data(gc);
264 int ret;
265
266 ret = ucd9000_gpio_read_config(client, offset);
267 if (ret < 0)
268 return ret;
269
270 return !!(ret & UCD9000_GPIO_CONFIG_STATUS);
271 }
272
ucd9000_gpio_set(struct gpio_chip * gc,unsigned int offset,int value)273 static void ucd9000_gpio_set(struct gpio_chip *gc, unsigned int offset,
274 int value)
275 {
276 struct i2c_client *client = gpiochip_get_data(gc);
277 int ret;
278
279 ret = ucd9000_gpio_read_config(client, offset);
280 if (ret < 0) {
281 dev_dbg(&client->dev, "failed to read GPIO %d config: %d\n",
282 offset, ret);
283 return;
284 }
285
286 if (value) {
287 if (ret & UCD9000_GPIO_CONFIG_STATUS)
288 return;
289
290 ret |= UCD9000_GPIO_CONFIG_STATUS;
291 } else {
292 if (!(ret & UCD9000_GPIO_CONFIG_STATUS))
293 return;
294
295 ret &= ~UCD9000_GPIO_CONFIG_STATUS;
296 }
297
298 ret |= UCD9000_GPIO_CONFIG_ENABLE;
299
300 /* Page set not required */
301 ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret);
302 if (ret < 0) {
303 dev_dbg(&client->dev, "Failed to write GPIO %d config: %d\n",
304 offset, ret);
305 return;
306 }
307
308 ret &= ~UCD9000_GPIO_CONFIG_ENABLE;
309
310 ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret);
311 if (ret < 0)
312 dev_dbg(&client->dev, "Failed to write GPIO %d config: %d\n",
313 offset, ret);
314 }
315
ucd9000_gpio_get_direction(struct gpio_chip * gc,unsigned int offset)316 static int ucd9000_gpio_get_direction(struct gpio_chip *gc,
317 unsigned int offset)
318 {
319 struct i2c_client *client = gpiochip_get_data(gc);
320 int ret;
321
322 ret = ucd9000_gpio_read_config(client, offset);
323 if (ret < 0)
324 return ret;
325
326 return !(ret & UCD9000_GPIO_CONFIG_OUT_ENABLE);
327 }
328
ucd9000_gpio_set_direction(struct gpio_chip * gc,unsigned int offset,bool direction_out,int requested_out)329 static int ucd9000_gpio_set_direction(struct gpio_chip *gc,
330 unsigned int offset, bool direction_out,
331 int requested_out)
332 {
333 struct i2c_client *client = gpiochip_get_data(gc);
334 int ret, config, out_val;
335
336 ret = ucd9000_gpio_read_config(client, offset);
337 if (ret < 0)
338 return ret;
339
340 if (direction_out) {
341 out_val = requested_out ? UCD9000_GPIO_CONFIG_OUT_VALUE : 0;
342
343 if (ret & UCD9000_GPIO_CONFIG_OUT_ENABLE) {
344 if ((ret & UCD9000_GPIO_CONFIG_OUT_VALUE) == out_val)
345 return 0;
346 } else {
347 ret |= UCD9000_GPIO_CONFIG_OUT_ENABLE;
348 }
349
350 if (out_val)
351 ret |= UCD9000_GPIO_CONFIG_OUT_VALUE;
352 else
353 ret &= ~UCD9000_GPIO_CONFIG_OUT_VALUE;
354
355 } else {
356 if (!(ret & UCD9000_GPIO_CONFIG_OUT_ENABLE))
357 return 0;
358
359 ret &= ~UCD9000_GPIO_CONFIG_OUT_ENABLE;
360 }
361
362 ret |= UCD9000_GPIO_CONFIG_ENABLE;
363 config = ret;
364
365 /* Page set not required */
366 ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config);
367 if (ret < 0)
368 return ret;
369
370 config &= ~UCD9000_GPIO_CONFIG_ENABLE;
371
372 return i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config);
373 }
374
ucd9000_gpio_direction_input(struct gpio_chip * gc,unsigned int offset)375 static int ucd9000_gpio_direction_input(struct gpio_chip *gc,
376 unsigned int offset)
377 {
378 return ucd9000_gpio_set_direction(gc, offset, UCD9000_GPIO_INPUT, 0);
379 }
380
ucd9000_gpio_direction_output(struct gpio_chip * gc,unsigned int offset,int val)381 static int ucd9000_gpio_direction_output(struct gpio_chip *gc,
382 unsigned int offset, int val)
383 {
384 return ucd9000_gpio_set_direction(gc, offset, UCD9000_GPIO_OUTPUT,
385 val);
386 }
387
ucd9000_probe_gpio(struct i2c_client * client,const struct i2c_device_id * mid,struct ucd9000_data * data)388 static void ucd9000_probe_gpio(struct i2c_client *client,
389 const struct i2c_device_id *mid,
390 struct ucd9000_data *data)
391 {
392 int rc;
393
394 switch (mid->driver_data) {
395 case ucd9090:
396 data->gpio.ngpio = UCD9090_NUM_GPIOS;
397 break;
398 case ucd90120:
399 case ucd90124:
400 case ucd90160:
401 data->gpio.ngpio = UCD901XX_NUM_GPIOS;
402 break;
403 case ucd90320:
404 data->gpio.ngpio = UCD90320_NUM_GPIOS;
405 break;
406 case ucd90910:
407 data->gpio.ngpio = UCD90910_NUM_GPIOS;
408 break;
409 default:
410 return; /* GPIO support is optional. */
411 }
412
413 /*
414 * Pinmux support has not been added to the new gpio_chip.
415 * This support should be added when possible given the mux
416 * behavior of these IO devices.
417 */
418 data->gpio.label = client->name;
419 data->gpio.get_direction = ucd9000_gpio_get_direction;
420 data->gpio.direction_input = ucd9000_gpio_direction_input;
421 data->gpio.direction_output = ucd9000_gpio_direction_output;
422 data->gpio.get = ucd9000_gpio_get;
423 data->gpio.set = ucd9000_gpio_set;
424 data->gpio.can_sleep = true;
425 data->gpio.base = -1;
426 data->gpio.parent = &client->dev;
427
428 rc = devm_gpiochip_add_data(&client->dev, &data->gpio, client);
429 if (rc)
430 dev_warn(&client->dev, "Could not add gpiochip: %d\n", rc);
431 }
432 #else
ucd9000_probe_gpio(struct i2c_client * client,const struct i2c_device_id * mid,struct ucd9000_data * data)433 static void ucd9000_probe_gpio(struct i2c_client *client,
434 const struct i2c_device_id *mid,
435 struct ucd9000_data *data)
436 {
437 }
438 #endif /* CONFIG_GPIOLIB */
439
440 #ifdef CONFIG_DEBUG_FS
ucd9000_get_mfr_status(struct i2c_client * client,u8 * buffer)441 static int ucd9000_get_mfr_status(struct i2c_client *client, u8 *buffer)
442 {
443 int ret = pmbus_set_page(client, 0, 0xff);
444
445 if (ret < 0)
446 return ret;
447
448 return i2c_smbus_read_block_data(client, UCD9000_MFR_STATUS, buffer);
449 }
450
ucd9000_debugfs_show_mfr_status_bit(void * data,u64 * val)451 static int ucd9000_debugfs_show_mfr_status_bit(void *data, u64 *val)
452 {
453 struct ucd9000_debugfs_entry *entry = data;
454 struct i2c_client *client = entry->client;
455 u8 buffer[I2C_SMBUS_BLOCK_MAX];
456 int ret, i;
457
458 ret = ucd9000_get_mfr_status(client, buffer);
459 if (ret < 0)
460 return ret;
461
462 /*
463 * GPI fault bits are in sets of 8, two bytes from end of response.
464 */
465 i = ret - 3 - entry->index / 8;
466 if (i >= 0)
467 *val = !!(buffer[i] & BIT(entry->index % 8));
468
469 return 0;
470 }
471 DEFINE_DEBUGFS_ATTRIBUTE(ucd9000_debugfs_mfr_status_bit,
472 ucd9000_debugfs_show_mfr_status_bit, NULL, "%1lld\n");
473
ucd9000_debugfs_read_mfr_status(struct file * file,char __user * buf,size_t count,loff_t * ppos)474 static ssize_t ucd9000_debugfs_read_mfr_status(struct file *file,
475 char __user *buf, size_t count,
476 loff_t *ppos)
477 {
478 struct i2c_client *client = file->private_data;
479 u8 buffer[I2C_SMBUS_BLOCK_MAX];
480 char str[(I2C_SMBUS_BLOCK_MAX * 2) + 2];
481 char *res;
482 int rc;
483
484 rc = ucd9000_get_mfr_status(client, buffer);
485 if (rc < 0)
486 return rc;
487
488 res = bin2hex(str, buffer, min(rc, I2C_SMBUS_BLOCK_MAX));
489 *res++ = '\n';
490 *res = 0;
491
492 return simple_read_from_buffer(buf, count, ppos, str, res - str);
493 }
494
495 static const struct file_operations ucd9000_debugfs_show_mfr_status_fops = {
496 .llseek = noop_llseek,
497 .read = ucd9000_debugfs_read_mfr_status,
498 .open = simple_open,
499 };
500
ucd9000_init_debugfs(struct i2c_client * client,const struct i2c_device_id * mid,struct ucd9000_data * data)501 static int ucd9000_init_debugfs(struct i2c_client *client,
502 const struct i2c_device_id *mid,
503 struct ucd9000_data *data)
504 {
505 struct dentry *debugfs;
506 struct ucd9000_debugfs_entry *entries;
507 int i, gpi_count;
508 char name[UCD9000_DEBUGFS_NAME_LEN];
509
510 debugfs = pmbus_get_debugfs_dir(client);
511 if (!debugfs)
512 return -ENOENT;
513
514 data->debugfs = debugfs_create_dir(client->name, debugfs);
515
516 /*
517 * Of the chips this driver supports, only the UCD9090, UCD90160,
518 * UCD90320, and UCD90910 report GPI faults in their MFR_STATUS
519 * register, so only create the GPI fault debugfs attributes for those
520 * chips.
521 */
522 if (mid->driver_data == ucd9090 || mid->driver_data == ucd90160 ||
523 mid->driver_data == ucd90320 || mid->driver_data == ucd90910) {
524 gpi_count = mid->driver_data == ucd90320 ? UCD90320_GPI_COUNT
525 : UCD9000_GPI_COUNT;
526 entries = devm_kcalloc(&client->dev,
527 gpi_count, sizeof(*entries),
528 GFP_KERNEL);
529 if (!entries)
530 return -ENOMEM;
531
532 for (i = 0; i < gpi_count; i++) {
533 entries[i].client = client;
534 entries[i].index = i;
535 scnprintf(name, UCD9000_DEBUGFS_NAME_LEN,
536 "gpi%d_alarm", i + 1);
537 debugfs_create_file(name, 0444, data->debugfs,
538 &entries[i],
539 &ucd9000_debugfs_mfr_status_bit);
540 }
541 }
542
543 scnprintf(name, UCD9000_DEBUGFS_NAME_LEN, "mfr_status");
544 debugfs_create_file(name, 0444, data->debugfs, client,
545 &ucd9000_debugfs_show_mfr_status_fops);
546
547 return 0;
548 }
549 #else
ucd9000_init_debugfs(struct i2c_client * client,const struct i2c_device_id * mid,struct ucd9000_data * data)550 static int ucd9000_init_debugfs(struct i2c_client *client,
551 const struct i2c_device_id *mid,
552 struct ucd9000_data *data)
553 {
554 return 0;
555 }
556 #endif /* CONFIG_DEBUG_FS */
557
ucd9000_probe(struct i2c_client * client)558 static int ucd9000_probe(struct i2c_client *client)
559 {
560 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
561 struct ucd9000_data *data;
562 struct pmbus_driver_info *info;
563 const struct i2c_device_id *mid;
564 enum chips chip;
565 int i, ret;
566
567 if (!i2c_check_functionality(client->adapter,
568 I2C_FUNC_SMBUS_BYTE_DATA |
569 I2C_FUNC_SMBUS_BLOCK_DATA))
570 return -ENODEV;
571
572 ret = i2c_smbus_read_block_data(client, UCD9000_DEVICE_ID,
573 block_buffer);
574 if (ret < 0) {
575 dev_err(&client->dev, "Failed to read device ID\n");
576 return ret;
577 }
578 block_buffer[ret] = '\0';
579 dev_info(&client->dev, "Device ID %s\n", block_buffer);
580
581 for (mid = ucd9000_id; mid->name[0]; mid++) {
582 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
583 break;
584 }
585 if (!mid->name[0]) {
586 dev_err(&client->dev, "Unsupported device\n");
587 return -ENODEV;
588 }
589
590 if (client->dev.of_node)
591 chip = (uintptr_t)of_device_get_match_data(&client->dev);
592 else
593 chip = mid->driver_data;
594
595 if (chip != ucd9000 && strcmp(client->name, mid->name) != 0)
596 dev_notice(&client->dev,
597 "Device mismatch: Configured %s, detected %s\n",
598 client->name, mid->name);
599
600 data = devm_kzalloc(&client->dev, sizeof(struct ucd9000_data),
601 GFP_KERNEL);
602 if (!data)
603 return -ENOMEM;
604 info = &data->info;
605
606 ret = i2c_smbus_read_byte_data(client, UCD9000_NUM_PAGES);
607 if (ret < 0) {
608 dev_err(&client->dev,
609 "Failed to read number of active pages\n");
610 return ret;
611 }
612 info->pages = ret;
613 if (!info->pages) {
614 dev_err(&client->dev, "No pages configured\n");
615 return -ENODEV;
616 }
617
618 /* The internal temperature sensor is always active */
619 info->func[0] = PMBUS_HAVE_TEMP;
620
621 /* Everything else is configurable */
622 ret = i2c_smbus_read_block_data(client, UCD9000_MONITOR_CONFIG,
623 block_buffer);
624 if (ret <= 0) {
625 dev_err(&client->dev, "Failed to read configuration data\n");
626 return -ENODEV;
627 }
628 for (i = 0; i < ret; i++) {
629 int page = UCD9000_MON_PAGE(block_buffer[i]);
630
631 if (page >= info->pages)
632 continue;
633
634 switch (UCD9000_MON_TYPE(block_buffer[i])) {
635 case UCD9000_MON_VOLTAGE:
636 case UCD9000_MON_VOLTAGE_HW:
637 info->func[page] |= PMBUS_HAVE_VOUT
638 | PMBUS_HAVE_STATUS_VOUT;
639 break;
640 case UCD9000_MON_TEMPERATURE:
641 info->func[page] |= PMBUS_HAVE_TEMP2
642 | PMBUS_HAVE_STATUS_TEMP;
643 break;
644 case UCD9000_MON_CURRENT:
645 info->func[page] |= PMBUS_HAVE_IOUT
646 | PMBUS_HAVE_STATUS_IOUT;
647 break;
648 default:
649 break;
650 }
651 }
652
653 /* Fan configuration */
654 if (mid->driver_data == ucd90124) {
655 for (i = 0; i < UCD9000_NUM_FAN; i++) {
656 i2c_smbus_write_byte_data(client,
657 UCD9000_FAN_CONFIG_INDEX, i);
658 ret = i2c_smbus_read_block_data(client,
659 UCD9000_FAN_CONFIG,
660 data->fan_data[i]);
661 if (ret < 0)
662 return ret;
663 }
664 i2c_smbus_write_byte_data(client, UCD9000_FAN_CONFIG_INDEX, 0);
665
666 info->read_byte_data = ucd9000_read_byte_data;
667 info->func[0] |= PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12
668 | PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34;
669 } else if (mid->driver_data == ucd90320) {
670 info->read_byte_data = ucd90320_read_byte_data;
671 info->read_word_data = ucd90320_read_word_data;
672 info->write_byte = ucd90320_write_byte;
673 info->write_word_data = ucd90320_write_word_data;
674 }
675
676 ucd9000_probe_gpio(client, mid, data);
677
678 ret = pmbus_do_probe(client, info);
679 if (ret)
680 return ret;
681
682 ret = ucd9000_init_debugfs(client, mid, data);
683 if (ret)
684 dev_warn(&client->dev, "Failed to register debugfs: %d\n",
685 ret);
686
687 return 0;
688 }
689
690 /* This is the driver that will be inserted */
691 static struct i2c_driver ucd9000_driver = {
692 .driver = {
693 .name = "ucd9000",
694 .of_match_table = of_match_ptr(ucd9000_of_match),
695 },
696 .probe = ucd9000_probe,
697 .id_table = ucd9000_id,
698 };
699
700 module_i2c_driver(ucd9000_driver);
701
702 MODULE_AUTHOR("Guenter Roeck");
703 MODULE_DESCRIPTION("PMBus driver for TI UCD90xxx");
704 MODULE_LICENSE("GPL");
705 MODULE_IMPORT_NS(PMBUS);
706
