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
23enum 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
63struct 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
74struct 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
89static 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
97static 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
110static 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
119static 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
133static 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
146static 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
161static 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
202static 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};
212MODULE_DEVICE_TABLE(i2c, ucd9000_id);
213
214static 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};
245MODULE_DEVICE_TABLE(of, ucd9000_of_match);
246
247#ifdef CONFIG_GPIOLIB
248static 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
261static 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
273static 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
316static 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
329static 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
375static 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
381static 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
388static 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
433static 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
441static 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
451static 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}
471DEFINE_DEBUGFS_ATTRIBUTE(ucd9000_debugfs_mfr_status_bit,
472			 ucd9000_debugfs_show_mfr_status_bit, NULL, "%1lld\n");
473
474static 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
495static 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
501static 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
550static 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
558static 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 */
691static 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
700module_i2c_driver(ucd9000_driver);
701
702MODULE_AUTHOR("Guenter Roeck");
703MODULE_DESCRIPTION("PMBus driver for TI UCD90xxx");
704MODULE_LICENSE("GPL");
705MODULE_IMPORT_NS(PMBUS);
706