summaryrefslogtreecommitdiffstats
path: root/drivers/hwmon/pmbus/ibm-cffps.c
blob: 53f7d1418bc9077d05f624c1475611e31bcbb87e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 2017 IBM Corp.
 */

#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/jiffies.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/pmbus.h>

#include "pmbus.h"

#define CFFPS_FRU_CMD				0x9A
#define CFFPS_PN_CMD				0x9B
#define CFFPS_HEADER_CMD			0x9C
#define CFFPS_SN_CMD				0x9E
#define CFFPS_MAX_POWER_OUT_CMD			0xA7
#define CFFPS_CCIN_CMD				0xBD
#define CFFPS_FW_CMD				0xFA
#define CFFPS1_FW_NUM_BYTES			4
#define CFFPS2_FW_NUM_WORDS			3
#define CFFPS_SYS_CONFIG_CMD			0xDA
#define CFFPS_12VCS_VOUT_CMD			0xDE

#define CFFPS_INPUT_HISTORY_CMD			0xD6
#define CFFPS_INPUT_HISTORY_SIZE		100

#define CFFPS_CCIN_REVISION			GENMASK(7, 0)
#define  CFFPS_CCIN_REVISION_LEGACY		 0xde
#define CFFPS_CCIN_VERSION			GENMASK(15, 8)
#define CFFPS_CCIN_VERSION_1			 0x2b
#define CFFPS_CCIN_VERSION_2			 0x2e
#define CFFPS_CCIN_VERSION_3			 0x51

/* STATUS_MFR_SPECIFIC bits */
#define CFFPS_MFR_FAN_FAULT			BIT(0)
#define CFFPS_MFR_THERMAL_FAULT			BIT(1)
#define CFFPS_MFR_OV_FAULT			BIT(2)
#define CFFPS_MFR_UV_FAULT			BIT(3)
#define CFFPS_MFR_PS_KILL			BIT(4)
#define CFFPS_MFR_OC_FAULT			BIT(5)
#define CFFPS_MFR_VAUX_FAULT			BIT(6)
#define CFFPS_MFR_CURRENT_SHARE_WARNING		BIT(7)

#define CFFPS_LED_BLINK				(BIT(0) | BIT(6))
#define CFFPS_LED_ON				(BIT(1) | BIT(6))
#define CFFPS_LED_OFF				(BIT(2) | BIT(6))
#define CFFPS_BLINK_RATE_MS			250

enum {
	CFFPS_DEBUGFS_INPUT_HISTORY = 0,
	CFFPS_DEBUGFS_FRU,
	CFFPS_DEBUGFS_PN,
	CFFPS_DEBUGFS_HEADER,
	CFFPS_DEBUGFS_SN,
	CFFPS_DEBUGFS_MAX_POWER_OUT,
	CFFPS_DEBUGFS_CCIN,
	CFFPS_DEBUGFS_FW,
	CFFPS_DEBUGFS_ON_OFF_CONFIG,
	CFFPS_DEBUGFS_NUM_ENTRIES
};

enum versions { cffps1, cffps2, cffps_unknown };

struct ibm_cffps_input_history {
	struct mutex update_lock;
	unsigned long last_update;

	u8 byte_count;
	u8 data[CFFPS_INPUT_HISTORY_SIZE];
};

struct ibm_cffps {
	enum versions version;
	struct i2c_client *client;

	struct ibm_cffps_input_history input_history;

	int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES];

	char led_name[32];
	u8 led_state;
	struct led_classdev led;
};

static const struct i2c_device_id ibm_cffps_id[];

#define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)])

static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu,
					    char __user *buf, size_t count,
					    loff_t *ppos)
{
	int rc;
	u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD };
	u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 };
	struct i2c_msg msg[2] = {
		{
			.addr = psu->client->addr,
			.flags = psu->client->flags,
			.len = 1,
			.buf = msgbuf0,
		}, {
			.addr = psu->client->addr,
			.flags = psu->client->flags | I2C_M_RD,
			.len = CFFPS_INPUT_HISTORY_SIZE + 1,
			.buf = msgbuf1,
		},
	};

	if (!*ppos) {
		mutex_lock(&psu->input_history.update_lock);
		if (time_after(jiffies, psu->input_history.last_update + HZ)) {
			/*
			 * Use a raw i2c transfer, since we need more bytes
			 * than Linux I2C supports through smbus xfr (only 32).
			 */
			rc = i2c_transfer(psu->client->adapter, msg, 2);
			if (rc < 0) {
				mutex_unlock(&psu->input_history.update_lock);
				return rc;
			}

			psu->input_history.byte_count = msgbuf1[0];
			memcpy(psu->input_history.data, &msgbuf1[1],
			       CFFPS_INPUT_HISTORY_SIZE);
			psu->input_history.last_update = jiffies;
		}

		mutex_unlock(&psu->input_history.update_lock);
	}

	return simple_read_from_buffer(buf, count, ppos,
				       psu->input_history.data,
				       psu->input_history.byte_count);
}

static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf,
				      size_t count, loff_t *ppos)
{
	u8 cmd;
	int i, rc;
	int *idxp = file->private_data;
	int idx = *idxp;
	struct ibm_cffps *psu = to_psu(idxp, idx);
	char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };

	pmbus_set_page(psu->client, 0, 0xff);

	switch (idx) {
	case CFFPS_DEBUGFS_INPUT_HISTORY:
		return ibm_cffps_read_input_history(psu, buf, count, ppos);
	case CFFPS_DEBUGFS_FRU:
		cmd = CFFPS_FRU_CMD;
		break;
	case CFFPS_DEBUGFS_PN:
		cmd = CFFPS_PN_CMD;
		break;
	case CFFPS_DEBUGFS_HEADER:
		cmd = CFFPS_HEADER_CMD;
		break;
	case CFFPS_DEBUGFS_SN:
		cmd = CFFPS_SN_CMD;
		break;
	case CFFPS_DEBUGFS_MAX_POWER_OUT:
		if (psu->version == cffps1) {
			rc = i2c_smbus_read_word_swapped(psu->client,
					CFFPS_MAX_POWER_OUT_CMD);
		} else {
			rc = i2c_smbus_read_word_data(psu->client,
					CFFPS_MAX_POWER_OUT_CMD);
		}

		if (rc < 0)
			return rc;

		rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc);
		goto done;
	case CFFPS_DEBUGFS_CCIN:
		rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 5, "%04X", rc);
		goto done;
	case CFFPS_DEBUGFS_FW:
		switch (psu->version) {
		case cffps1:
			for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) {
				rc = i2c_smbus_read_byte_data(psu->client,
							      CFFPS_FW_CMD +
								i);
				if (rc < 0)
					return rc;

				snprintf(&data[i * 2], 3, "%02X", rc);
			}

			rc = i * 2;
			break;
		case cffps2:
			for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) {
				rc = i2c_smbus_read_word_data(psu->client,
							      CFFPS_FW_CMD +
								i);
				if (rc < 0)
					return rc;

				snprintf(&data[i * 4], 5, "%04X", rc);
			}

			rc = i * 4;
			break;
		default:
			return -EOPNOTSUPP;
		}
		goto done;
	case CFFPS_DEBUGFS_ON_OFF_CONFIG:
		rc = i2c_smbus_read_byte_data(psu->client,
					      PMBUS_ON_OFF_CONFIG);
		if (rc < 0)
			return rc;

		rc = snprintf(data, 3, "%02x", rc);
		goto done;
	default:
		return -EINVAL;
	}

	rc = i2c_smbus_read_block_data(psu->client, cmd, data);
	if (rc < 0)
		return rc;

done:
	data[rc] = '\n';
	rc += 2;

	return simple_read_from_buffer(buf, count, ppos, data, rc);
}

static ssize_t ibm_cffps_debugfs_write(struct file *file,
				       const char __user *buf, size_t count,
				       loff_t *ppos)
{
	u8 data;
	ssize_t rc;
	int *idxp = file->private_data;
	int idx = *idxp;
	struct ibm_cffps *psu = to_psu(idxp, idx);

	switch (idx) {
	case CFFPS_DEBUGFS_ON_OFF_CONFIG:
		pmbus_set_page(psu->client, 0, 0xff);

		rc = simple_write_to_buffer(&data, 1, ppos, buf, count);
		if (rc <= 0)
			return rc;

		rc = i2c_smbus_write_byte_data(psu->client,
					       PMBUS_ON_OFF_CONFIG, data);
		if (rc)
			return rc;

		rc = 1;
		break;
	default:
		return -EINVAL;
	}

	return rc;
}

static const struct file_operations ibm_cffps_fops = {
	.llseek = noop_llseek,
	.read = ibm_cffps_debugfs_read,
	.write = ibm_cffps_debugfs_write,
	.open = simple_open,
};

static int ibm_cffps_read_byte_data(struct i2c_client *client, int page,
				    int reg)
{
	int rc, mfr;

	switch (reg) {
	case PMBUS_STATUS_VOUT:
	case PMBUS_STATUS_IOUT:
	case PMBUS_STATUS_TEMPERATURE:
	case PMBUS_STATUS_FAN_12:
		rc = pmbus_read_byte_data(client, page, reg);
		if (rc < 0)
			return rc;

		mfr = pmbus_read_byte_data(client, page,
					   PMBUS_STATUS_MFR_SPECIFIC);
		if (mfr < 0)
			/*
			 * Return the status register instead of an error,
			 * since we successfully read status.
			 */
			return rc;

		/* Add MFR_SPECIFIC bits to the standard pmbus status regs. */
		if (reg == PMBUS_STATUS_FAN_12) {
			if (mfr & CFFPS_MFR_FAN_FAULT)
				rc |= PB_FAN_FAN1_FAULT;
		} else if (reg == PMBUS_STATUS_TEMPERATURE) {
			if (mfr & CFFPS_MFR_THERMAL_FAULT)
				rc |= PB_TEMP_OT_FAULT;
		} else if (reg == PMBUS_STATUS_VOUT) {
			if (mfr & (CFFPS_MFR_OV_FAULT | CFFPS_MFR_VAUX_FAULT))
				rc |= PB_VOLTAGE_OV_FAULT;
			if (mfr & CFFPS_MFR_UV_FAULT)
				rc |= PB_VOLTAGE_UV_FAULT;
		} else if (reg == PMBUS_STATUS_IOUT) {
			if (mfr & CFFPS_MFR_OC_FAULT)
				rc |= PB_IOUT_OC_FAULT;
			if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING)
				rc |= PB_CURRENT_SHARE_FAULT;
		}
		break;
	default:
		rc = -ENODATA;
		break;
	}

	return rc;
}

static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
				    int phase, int reg)
{
	int rc, mfr;

	switch (reg) {
	case PMBUS_STATUS_WORD:
		rc = pmbus_read_word_data(client, page, phase, reg);
		if (rc < 0)
			return rc;

		mfr = pmbus_read_byte_data(client, page,
					   PMBUS_STATUS_MFR_SPECIFIC);
		if (mfr < 0)
			/*
			 * Return the status register instead of an error,
			 * since we successfully read status.
			 */
			return rc;

		if (mfr & CFFPS_MFR_PS_KILL)
			rc |= PB_STATUS_OFF;
		break;
	case PMBUS_VIRT_READ_VMON:
		rc = pmbus_read_word_data(client, page, phase,
					  CFFPS_12VCS_VOUT_CMD);
		break;
	default:
		rc = -ENODATA;
		break;
	}

	return rc;
}

static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
					enum led_brightness brightness)
{
	int rc;
	u8 next_led_state;
	struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);

	if (brightness == LED_OFF) {
		next_led_state = CFFPS_LED_OFF;
	} else {
		brightness = LED_FULL;

		if (psu->led_state != CFFPS_LED_BLINK)
			next_led_state = CFFPS_LED_ON;
		else
			next_led_state = CFFPS_LED_BLINK;
	}

	dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n",
		brightness, next_led_state);

	pmbus_set_page(psu->client, 0, 0xff);

	rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
				       next_led_state);
	if (rc < 0)
		return rc;

	psu->led_state = next_led_state;
	led_cdev->brightness = brightness;

	return 0;
}

static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
				   unsigned long *delay_on,
				   unsigned long *delay_off)
{
	int rc;
	struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);

	dev_dbg(&psu->client->dev, "LED blink set.\n");

	pmbus_set_page(psu->client, 0, 0xff);

	rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
				       CFFPS_LED_BLINK);
	if (rc < 0)
		return rc;

	psu->led_state = CFFPS_LED_BLINK;
	led_cdev->brightness = LED_FULL;
	*delay_on = CFFPS_BLINK_RATE_MS;
	*delay_off = CFFPS_BLINK_RATE_MS;

	return 0;
}

static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
{
	int rc;
	struct i2c_client *client = psu->client;
	struct device *dev = &client->dev;

	snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name,
		 client->addr);
	psu->led.name = psu->led_name;
	psu->led.max_brightness = LED_FULL;
	psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set;
	psu->led.blink_set = ibm_cffps_led_blink_set;

	rc = devm_led_classdev_register(dev, &psu->led);
	if (rc)
		dev_warn(dev, "failed to register led class: %d\n", rc);
	else
		i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD,
					  CFFPS_LED_OFF);
}

static struct pmbus_driver_info ibm_cffps_info[] = {
	[cffps1] = {
		.pages = 1,
		.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
			PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
			PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
			PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
			PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
			PMBUS_HAVE_STATUS_FAN12,
		.read_byte_data = ibm_cffps_read_byte_data,
		.read_word_data = ibm_cffps_read_word_data,
	},
	[cffps2] = {
		.pages = 2,
		.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
			PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP |
			PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
			PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
			PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
			PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_VMON,
		.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
			PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
			PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT,
		.read_byte_data = ibm_cffps_read_byte_data,
		.read_word_data = ibm_cffps_read_word_data,
	},
};

static struct pmbus_platform_data ibm_cffps_pdata = {
	.flags = PMBUS_SKIP_STATUS_CHECK | PMBUS_NO_CAPABILITY,
};

static int ibm_cffps_probe(struct i2c_client *client)
{
	int i, rc;
	enum versions vs = cffps_unknown;
	struct dentry *debugfs;
	struct dentry *ibm_cffps_dir;
	struct ibm_cffps *psu;
	const void *md = of_device_get_match_data(&client->dev);
	const struct i2c_device_id *id;

	if (md) {
		vs = (enum versions)md;
	} else {
		id = i2c_match_id(ibm_cffps_id, client);
		if (id)
			vs = (enum versions)id->driver_data;
	}

	if (vs == cffps_unknown) {
		u16 ccin_revision = 0;
		u16 ccin_version = CFFPS_CCIN_VERSION_1;
		int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);

		if (ccin > 0) {
			ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
			ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
		}

		switch (ccin_version) {
		default:
		case CFFPS_CCIN_VERSION_1:
			vs = cffps1;
			break;
		case CFFPS_CCIN_VERSION_2:
			vs = cffps2;
			break;
		case CFFPS_CCIN_VERSION_3:
			if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY)
				vs = cffps1;
			else
				vs = cffps2;
			break;
		}

		/* Set the client name to include the version number. */
		snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1);
	}

	client->dev.platform_data = &ibm_cffps_pdata;
	rc = pmbus_do_probe(client, &ibm_cffps_info[vs]);
	if (rc)
		return rc;

	/*
	 * Don't fail the probe if there isn't enough memory for leds and
	 * debugfs.
	 */
	psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
	if (!psu)
		return 0;

	psu->version = vs;
	psu->client = client;
	mutex_init(&psu->input_history.update_lock);
	psu->input_history.last_update = jiffies - HZ;

	ibm_cffps_create_led_class(psu);

	/* Don't fail the probe if we can't create debugfs */
	debugfs = pmbus_get_debugfs_dir(client);
	if (!debugfs)
		return 0;

	ibm_cffps_dir = debugfs_create_dir(client->name, debugfs);
	if (!ibm_cffps_dir)
		return 0;

	for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i)
		psu->debugfs_entries[i] = i;

	debugfs_create_file("input_history", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY],
			    &ibm_cffps_fops);
	debugfs_create_file("fru", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_FRU],
			    &ibm_cffps_fops);
	debugfs_create_file("part_number", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_PN],
			    &ibm_cffps_fops);
	debugfs_create_file("header", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_HEADER],
			    &ibm_cffps_fops);
	debugfs_create_file("serial_number", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_SN],
			    &ibm_cffps_fops);
	debugfs_create_file("max_power_out", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT],
			    &ibm_cffps_fops);
	debugfs_create_file("ccin", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN],
			    &ibm_cffps_fops);
	debugfs_create_file("fw_version", 0444, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_FW],
			    &ibm_cffps_fops);
	debugfs_create_file("on_off_config", 0644, ibm_cffps_dir,
			    &psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG],
			    &ibm_cffps_fops);

	return 0;
}

static const struct i2c_device_id ibm_cffps_id[] = {
	{ "ibm_cffps1", cffps1 },
	{ "ibm_cffps2", cffps2 },
	{ "ibm_cffps", cffps_unknown },
	{}
};
MODULE_DEVICE_TABLE(i2c, ibm_cffps_id);

static const struct of_device_id ibm_cffps_of_match[] = {
	{
		.compatible = "ibm,cffps1",
		.data = (void *)cffps1
	},
	{
		.compatible = "ibm,cffps2",
		.data = (void *)cffps2
	},
	{
		.compatible = "ibm,cffps",
		.data = (void *)cffps_unknown
	},
	{}
};
MODULE_DEVICE_TABLE(of, ibm_cffps_of_match);

static struct i2c_driver ibm_cffps_driver = {
	.driver = {
		.name = "ibm-cffps",
		.of_match_table = ibm_cffps_of_match,
	},
	.probe_new = ibm_cffps_probe,
	.id_table = ibm_cffps_id,
};

module_i2c_driver(ibm_cffps_driver);

MODULE_AUTHOR("Eddie James");
MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(PMBUS);