summaryrefslogtreecommitdiff
path: root/drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c
blob: d0319bee01c0fb3be7a26b5627cd8bf29d76424e (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
635
636
637
638
639
640
641
642
643
644
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/slab.h>

#define USB2_PHY_USB_PHY_UTMI_CTRL0		(0x3c)
#define SLEEPM					BIT(0)
#define OPMODE_MASK				GENMASK(4, 3)
#define OPMODE_NORMAL				(0x00)
#define OPMODE_NONDRIVING			BIT(3)
#define TERMSEL					BIT(5)

#define USB2_PHY_USB_PHY_UTMI_CTRL1		(0x40)
#define XCVRSEL					BIT(0)

#define USB2_PHY_USB_PHY_UTMI_CTRL5		(0x50)
#define POR					BIT(1)

#define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0	(0x54)
#define SIDDQ					BIT(2)
#define RETENABLEN				BIT(3)
#define FSEL_MASK				GENMASK(6, 4)
#define FSEL_DEFAULT				(0x3 << 4)

#define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1	(0x58)
#define VBUSVLDEXTSEL0				BIT(4)
#define PLLBTUNE				BIT(5)

#define USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2	(0x5c)
#define VREGBYPASS				BIT(0)

#define USB2_PHY_USB_PHY_HS_PHY_CTRL1		(0x60)
#define VBUSVLDEXT0				BIT(0)

#define USB2_PHY_USB_PHY_HS_PHY_CTRL2		(0x64)
#define USB2_AUTO_RESUME			BIT(0)
#define USB2_SUSPEND_N				BIT(2)
#define USB2_SUSPEND_N_SEL			BIT(3)

#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0		(0x6c)
#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1		(0x70)
#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2		(0x74)
#define USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3		(0x78)
#define PARAM_OVRD_MASK				0xFF

#define USB2_PHY_USB_PHY_CFG0			(0x94)
#define UTMI_PHY_DATAPATH_CTRL_OVERRIDE_EN	BIT(0)
#define UTMI_PHY_CMN_CTRL_OVERRIDE_EN		BIT(1)

#define USB2_PHY_USB_PHY_REFCLK_CTRL		(0xa0)
#define REFCLK_SEL_MASK				GENMASK(1, 0)
#define REFCLK_SEL_DEFAULT			(0x2 << 0)

#define HS_DISCONNECT_MASK			GENMASK(2, 0)
#define SQUELCH_DETECTOR_MASK			GENMASK(7, 5)

#define HS_AMPLITUDE_MASK			GENMASK(3, 0)
#define PREEMPHASIS_DURATION_MASK		BIT(5)
#define PREEMPHASIS_AMPLITUDE_MASK		GENMASK(7, 6)

#define HS_RISE_FALL_MASK			GENMASK(1, 0)
#define HS_CROSSOVER_VOLTAGE_MASK		GENMASK(3, 2)
#define HS_OUTPUT_IMPEDANCE_MASK		GENMASK(5, 4)

#define LS_FS_OUTPUT_IMPEDANCE_MASK		GENMASK(3, 0)

static const char * const qcom_snps_hsphy_vreg_names[] = {
	"vdda-pll", "vdda33", "vdda18",
};

#define SNPS_HS_NUM_VREGS		ARRAY_SIZE(qcom_snps_hsphy_vreg_names)

struct override_param {
	s32	value;
	u8	reg_val;
};

struct override_param_map {
	const char *prop_name;
	const struct override_param *param_table;
	u8 table_size;
	u8 reg_offset;
	u8 param_mask;
};

struct phy_override_seq {
	bool	need_update;
	u8	offset;
	u8	value;
	u8	mask;
};

#define NUM_HSPHY_TUNING_PARAMS	(9)

/**
 * struct qcom_snps_hsphy - snps hs phy attributes
 *
 * @dev: device structure
 *
 * @phy: generic phy
 * @base: iomapped memory space for snps hs phy
 *
 * @num_clks: number of clocks
 * @clks: array of clocks
 * @phy_reset: phy reset control
 * @vregs: regulator supplies bulk data
 * @phy_initialized: if PHY has been initialized correctly
 * @mode: contains the current mode the PHY is in
 * @update_seq_cfg: tuning parameters for phy init
 */
struct qcom_snps_hsphy {
	struct device *dev;

	struct phy *phy;
	void __iomem *base;

	int num_clks;
	struct clk_bulk_data *clks;
	struct reset_control *phy_reset;
	struct regulator_bulk_data vregs[SNPS_HS_NUM_VREGS];

	bool phy_initialized;
	enum phy_mode mode;
	struct phy_override_seq update_seq_cfg[NUM_HSPHY_TUNING_PARAMS];
};

static int qcom_snps_hsphy_clk_init(struct qcom_snps_hsphy *hsphy)
{
	struct device *dev = hsphy->dev;

	hsphy->num_clks = 2;
	hsphy->clks = devm_kcalloc(dev, hsphy->num_clks, sizeof(*hsphy->clks), GFP_KERNEL);
	if (!hsphy->clks)
		return -ENOMEM;

	/*
	 * TODO: Currently no device tree instantiation of the PHY is using the clock.
	 * This needs to be fixed in order for this code to be able to use devm_clk_bulk_get().
	 */
	hsphy->clks[0].id = "cfg_ahb";
	hsphy->clks[0].clk = devm_clk_get_optional(dev, "cfg_ahb");
	if (IS_ERR(hsphy->clks[0].clk))
		return dev_err_probe(dev, PTR_ERR(hsphy->clks[0].clk),
				     "failed to get cfg_ahb clk\n");

	hsphy->clks[1].id = "ref";
	hsphy->clks[1].clk = devm_clk_get(dev, "ref");
	if (IS_ERR(hsphy->clks[1].clk))
		return dev_err_probe(dev, PTR_ERR(hsphy->clks[1].clk),
				     "failed to get ref clk\n");

	return 0;
}

static inline void qcom_snps_hsphy_write_mask(void __iomem *base, u32 offset,
						u32 mask, u32 val)
{
	u32 reg;

	reg = readl_relaxed(base + offset);
	reg &= ~mask;
	reg |= val & mask;
	writel_relaxed(reg, base + offset);

	/* Ensure above write is completed */
	readl_relaxed(base + offset);
}

static int qcom_snps_hsphy_suspend(struct qcom_snps_hsphy *hsphy)
{
	dev_dbg(&hsphy->phy->dev, "Suspend QCOM SNPS PHY\n");

	if (hsphy->mode == PHY_MODE_USB_HOST) {
		/* Enable auto-resume to meet remote wakeup timing */
		qcom_snps_hsphy_write_mask(hsphy->base,
					   USB2_PHY_USB_PHY_HS_PHY_CTRL2,
					   USB2_AUTO_RESUME,
					   USB2_AUTO_RESUME);
		usleep_range(500, 1000);
		qcom_snps_hsphy_write_mask(hsphy->base,
					   USB2_PHY_USB_PHY_HS_PHY_CTRL2,
					   0, USB2_AUTO_RESUME);
	}

	return 0;
}

static int qcom_snps_hsphy_resume(struct qcom_snps_hsphy *hsphy)
{
	dev_dbg(&hsphy->phy->dev, "Resume QCOM SNPS PHY, mode\n");

	return 0;
}

static int __maybe_unused qcom_snps_hsphy_runtime_suspend(struct device *dev)
{
	struct qcom_snps_hsphy *hsphy = dev_get_drvdata(dev);

	if (!hsphy->phy_initialized)
		return 0;

	return qcom_snps_hsphy_suspend(hsphy);
}

static int __maybe_unused qcom_snps_hsphy_runtime_resume(struct device *dev)
{
	struct qcom_snps_hsphy *hsphy = dev_get_drvdata(dev);

	if (!hsphy->phy_initialized)
		return 0;

	return qcom_snps_hsphy_resume(hsphy);
}

static int qcom_snps_hsphy_set_mode(struct phy *phy, enum phy_mode mode,
				    int submode)
{
	struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy);

	hsphy->mode = mode;
	return 0;
}

static const struct override_param hs_disconnect_sc7280[] = {
	{ -272, 0 },
	{ 0, 1 },
	{ 317, 2 },
	{ 630, 3 },
	{ 973, 4 },
	{ 1332, 5 },
	{ 1743, 6 },
	{ 2156, 7 },
};

static const struct override_param squelch_det_threshold_sc7280[] = {
	{ -2090, 7 },
	{ -1560, 6 },
	{ -1030, 5 },
	{ -530, 4 },
	{ 0, 3 },
	{ 530, 2 },
	{ 1060, 1 },
	{ 1590, 0 },
};

static const struct override_param hs_amplitude_sc7280[] = {
	{ -660, 0 },
	{ -440, 1 },
	{ -220, 2 },
	{ 0, 3 },
	{ 230, 4 },
	{ 440, 5 },
	{ 650, 6 },
	{ 890, 7 },
	{ 1110, 8 },
	{ 1330, 9 },
	{ 1560, 10 },
	{ 1780, 11 },
	{ 2000, 12 },
	{ 2220, 13 },
	{ 2430, 14 },
	{ 2670, 15 },
};

static const struct override_param preemphasis_duration_sc7280[] = {
	{ 10000, 1 },
	{ 20000, 0 },
};

static const struct override_param preemphasis_amplitude_sc7280[] = {
	{ 10000, 1 },
	{ 20000, 2 },
	{ 30000, 3 },
	{ 40000, 0 },
};

static const struct override_param hs_rise_fall_time_sc7280[] = {
	{ -4100, 3 },
	{ 0, 2 },
	{ 2810, 1 },
	{ 5430, 0 },
};

static const struct override_param hs_crossover_voltage_sc7280[] = {
	{ -31000, 1 },
	{ 0, 3 },
	{ 28000, 2 },
};

static const struct override_param hs_output_impedance_sc7280[] = {
	{ -2300000, 3 },
	{ 0, 2 },
	{ 2600000, 1 },
	{ 6100000, 0 },
};

static const struct override_param ls_fs_output_impedance_sc7280[] = {
	{ -1053, 15 },
	{ -557, 7 },
	{ 0, 3 },
	{ 612, 1 },
	{ 1310, 0 },
};

static const struct override_param_map sc7280_snps_7nm_phy[] = {
	{
		"qcom,hs-disconnect-bp",
		hs_disconnect_sc7280,
		ARRAY_SIZE(hs_disconnect_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
		HS_DISCONNECT_MASK
	},
	{
		"qcom,squelch-detector-bp",
		squelch_det_threshold_sc7280,
		ARRAY_SIZE(squelch_det_threshold_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X0,
		SQUELCH_DETECTOR_MASK
	},
	{
		"qcom,hs-amplitude-bp",
		hs_amplitude_sc7280,
		ARRAY_SIZE(hs_amplitude_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
		HS_AMPLITUDE_MASK
	},
	{
		"qcom,pre-emphasis-duration-bp",
		preemphasis_duration_sc7280,
		ARRAY_SIZE(preemphasis_duration_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
		PREEMPHASIS_DURATION_MASK,
	},
	{
		"qcom,pre-emphasis-amplitude-bp",
		preemphasis_amplitude_sc7280,
		ARRAY_SIZE(preemphasis_amplitude_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X1,
		PREEMPHASIS_AMPLITUDE_MASK,
	},
	{
		"qcom,hs-rise-fall-time-bp",
		hs_rise_fall_time_sc7280,
		ARRAY_SIZE(hs_rise_fall_time_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
		HS_RISE_FALL_MASK
	},
	{
		"qcom,hs-crossover-voltage-microvolt",
		hs_crossover_voltage_sc7280,
		ARRAY_SIZE(hs_crossover_voltage_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
		HS_CROSSOVER_VOLTAGE_MASK
	},
	{
		"qcom,hs-output-impedance-micro-ohms",
		hs_output_impedance_sc7280,
		ARRAY_SIZE(hs_output_impedance_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X2,
		HS_OUTPUT_IMPEDANCE_MASK,
	},
	{
		"qcom,ls-fs-output-impedance-bp",
		ls_fs_output_impedance_sc7280,
		ARRAY_SIZE(ls_fs_output_impedance_sc7280),
		USB2_PHY_USB_PHY_HS_PHY_OVERRIDE_X3,
		LS_FS_OUTPUT_IMPEDANCE_MASK,
	},
	{},
};

static int qcom_snps_hsphy_init(struct phy *phy)
{
	struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy);
	int ret, i;

	dev_vdbg(&phy->dev, "%s(): Initializing SNPS HS phy\n", __func__);

	ret = regulator_bulk_enable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs);
	if (ret)
		return ret;

	ret = clk_bulk_prepare_enable(hsphy->num_clks, hsphy->clks);
	if (ret) {
		dev_err(&phy->dev, "failed to enable clocks, %d\n", ret);
		goto poweroff_phy;
	}

	ret = reset_control_assert(hsphy->phy_reset);
	if (ret) {
		dev_err(&phy->dev, "failed to assert phy_reset, %d\n", ret);
		goto disable_clks;
	}

	usleep_range(100, 150);

	ret = reset_control_deassert(hsphy->phy_reset);
	if (ret) {
		dev_err(&phy->dev, "failed to de-assert phy_reset, %d\n", ret);
		goto disable_clks;
	}

	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_CFG0,
					UTMI_PHY_CMN_CTRL_OVERRIDE_EN,
					UTMI_PHY_CMN_CTRL_OVERRIDE_EN);
	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL5,
							POR, POR);
	qcom_snps_hsphy_write_mask(hsphy->base,
					USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0,
					FSEL_MASK, 0);
	qcom_snps_hsphy_write_mask(hsphy->base,
					USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1,
					PLLBTUNE, PLLBTUNE);
	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_REFCLK_CTRL,
					REFCLK_SEL_DEFAULT, REFCLK_SEL_MASK);
	qcom_snps_hsphy_write_mask(hsphy->base,
					USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON1,
					VBUSVLDEXTSEL0, VBUSVLDEXTSEL0);
	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL1,
					VBUSVLDEXT0, VBUSVLDEXT0);

	for (i = 0; i < ARRAY_SIZE(hsphy->update_seq_cfg); i++) {
		if (hsphy->update_seq_cfg[i].need_update)
			qcom_snps_hsphy_write_mask(hsphy->base,
					hsphy->update_seq_cfg[i].offset,
					hsphy->update_seq_cfg[i].mask,
					hsphy->update_seq_cfg[i].value);
	}

	qcom_snps_hsphy_write_mask(hsphy->base,
					USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON2,
					VREGBYPASS, VREGBYPASS);

	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL2,
					USB2_SUSPEND_N_SEL | USB2_SUSPEND_N,
					USB2_SUSPEND_N_SEL | USB2_SUSPEND_N);

	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL0,
					SLEEPM, SLEEPM);

	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL_COMMON0,
				   SIDDQ, 0);

	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_UTMI_CTRL5,
					POR, 0);

	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_HS_PHY_CTRL2,
					USB2_SUSPEND_N_SEL, 0);

	qcom_snps_hsphy_write_mask(hsphy->base, USB2_PHY_USB_PHY_CFG0,
					UTMI_PHY_CMN_CTRL_OVERRIDE_EN, 0);

	hsphy->phy_initialized = true;

	return 0;

disable_clks:
	clk_bulk_disable_unprepare(hsphy->num_clks, hsphy->clks);
poweroff_phy:
	regulator_bulk_disable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs);

	return ret;
}

static int qcom_snps_hsphy_exit(struct phy *phy)
{
	struct qcom_snps_hsphy *hsphy = phy_get_drvdata(phy);

	reset_control_assert(hsphy->phy_reset);
	clk_bulk_disable_unprepare(hsphy->num_clks, hsphy->clks);
	regulator_bulk_disable(ARRAY_SIZE(hsphy->vregs), hsphy->vregs);
	hsphy->phy_initialized = false;

	return 0;
}

static const struct phy_ops qcom_snps_hsphy_gen_ops = {
	.init		= qcom_snps_hsphy_init,
	.exit		= qcom_snps_hsphy_exit,
	.set_mode	= qcom_snps_hsphy_set_mode,
	.owner		= THIS_MODULE,
};

static const struct of_device_id qcom_snps_hsphy_of_match_table[] = {
	{ .compatible	= "qcom,sm8150-usb-hs-phy", },
	{ .compatible	= "qcom,usb-snps-hs-5nm-phy", },
	{
		.compatible	= "qcom,usb-snps-hs-7nm-phy",
		.data		= &sc7280_snps_7nm_phy,
	},
	{ .compatible	= "qcom,usb-snps-femto-v2-phy",	},
	{ }
};
MODULE_DEVICE_TABLE(of, qcom_snps_hsphy_of_match_table);

static const struct dev_pm_ops qcom_snps_hsphy_pm_ops = {
	SET_RUNTIME_PM_OPS(qcom_snps_hsphy_runtime_suspend,
			   qcom_snps_hsphy_runtime_resume, NULL)
};

static void qcom_snps_hsphy_override_param_update_val(
			const struct override_param_map map,
			s32 dt_val, struct phy_override_seq *seq_entry)
{
	int i;

	/*
	 * Param table for each param is in increasing order
	 * of dt values. We need to iterate over the list to
	 * select the entry that matches the dt value and pick
	 * up the corresponding register value.
	 */
	for (i = 0; i < map.table_size - 1; i++) {
		if (map.param_table[i].value == dt_val)
			break;
	}

	seq_entry->need_update = true;
	seq_entry->offset = map.reg_offset;
	seq_entry->mask = map.param_mask;
	seq_entry->value = map.param_table[i].reg_val << __ffs(map.param_mask);
}

static void qcom_snps_hsphy_read_override_param_seq(struct device *dev)
{
	struct device_node *node = dev->of_node;
	s32 val;
	int ret, i;
	struct qcom_snps_hsphy *hsphy;
	const struct override_param_map *cfg = of_device_get_match_data(dev);

	if (!cfg)
		return;

	hsphy = dev_get_drvdata(dev);

	for (i = 0; cfg[i].prop_name != NULL; i++) {
		ret = of_property_read_s32(node, cfg[i].prop_name, &val);
		if (ret)
			continue;

		qcom_snps_hsphy_override_param_update_val(cfg[i], val,
					&hsphy->update_seq_cfg[i]);
		dev_dbg(&hsphy->phy->dev, "Read param: %s dt_val: %d reg_val: 0x%x\n",
			cfg[i].prop_name, val, hsphy->update_seq_cfg[i].value);

	}
}

static int qcom_snps_hsphy_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct qcom_snps_hsphy *hsphy;
	struct phy_provider *phy_provider;
	struct phy *generic_phy;
	int ret, i;
	int num;

	hsphy = devm_kzalloc(dev, sizeof(*hsphy), GFP_KERNEL);
	if (!hsphy)
		return -ENOMEM;

	hsphy->dev = dev;

	hsphy->base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(hsphy->base))
		return PTR_ERR(hsphy->base);

	ret = qcom_snps_hsphy_clk_init(hsphy);
	if (ret)
		return dev_err_probe(dev, ret, "failed to initialize clocks\n");

	hsphy->phy_reset = devm_reset_control_get_exclusive(&pdev->dev, NULL);
	if (IS_ERR(hsphy->phy_reset)) {
		dev_err(dev, "failed to get phy core reset\n");
		return PTR_ERR(hsphy->phy_reset);
	}

	num = ARRAY_SIZE(hsphy->vregs);
	for (i = 0; i < num; i++)
		hsphy->vregs[i].supply = qcom_snps_hsphy_vreg_names[i];

	ret = devm_regulator_bulk_get(dev, num, hsphy->vregs);
	if (ret)
		return dev_err_probe(dev, ret,
				     "failed to get regulator supplies\n");

	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	/*
	 * Prevent runtime pm from being ON by default. Users can enable
	 * it using power/control in sysfs.
	 */
	pm_runtime_forbid(dev);

	generic_phy = devm_phy_create(dev, NULL, &qcom_snps_hsphy_gen_ops);
	if (IS_ERR(generic_phy)) {
		ret = PTR_ERR(generic_phy);
		dev_err(dev, "failed to create phy, %d\n", ret);
		return ret;
	}
	hsphy->phy = generic_phy;

	dev_set_drvdata(dev, hsphy);
	phy_set_drvdata(generic_phy, hsphy);
	qcom_snps_hsphy_read_override_param_seq(dev);

	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
	if (!IS_ERR(phy_provider))
		dev_dbg(dev, "Registered Qcom-SNPS HS phy\n");
	else
		pm_runtime_disable(dev);

	return PTR_ERR_OR_ZERO(phy_provider);
}

static struct platform_driver qcom_snps_hsphy_driver = {
	.probe		= qcom_snps_hsphy_probe,
	.driver = {
		.name	= "qcom-snps-hs-femto-v2-phy",
		.pm = &qcom_snps_hsphy_pm_ops,
		.of_match_table = qcom_snps_hsphy_of_match_table,
	},
};

module_platform_driver(qcom_snps_hsphy_driver);

MODULE_DESCRIPTION("Qualcomm SNPS FEMTO USB HS PHY V2 driver");
MODULE_LICENSE("GPL v2");