1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2017, 2019, The Linux Foundation. All rights reserved.
4  */
5 
6 #include <linux/clk.h>
7 #include <linux/delay.h>
8 #include <linux/err.h>
9 #include <linux/io.h>
10 #include <linux/kernel.h>
11 #include <linux/mfd/syscon.h>
12 #include <linux/module.h>
13 #include <linux/nvmem-consumer.h>
14 #include <linux/of.h>
15 #include <linux/of_device.h>
16 #include <linux/phy/phy.h>
17 #include <linux/platform_device.h>
18 #include <linux/regmap.h>
19 #include <linux/regulator/consumer.h>
20 #include <linux/reset.h>
21 #include <linux/slab.h>
22 
23 #include <dt-bindings/phy/phy-qcom-qusb2.h>
24 
25 #define QUSB2PHY_PLL			0x0
26 #define QUSB2PHY_PLL_TEST		0x04
27 #define CLK_REF_SEL			BIT(7)
28 
29 #define QUSB2PHY_PLL_TUNE		0x08
30 #define QUSB2PHY_PLL_USER_CTL1		0x0c
31 #define QUSB2PHY_PLL_USER_CTL2		0x10
32 #define QUSB2PHY_PLL_AUTOPGM_CTL1	0x1c
33 #define QUSB2PHY_PLL_PWR_CTRL		0x18
34 
35 /* QUSB2PHY_PLL_STATUS register bits */
36 #define PLL_LOCKED			BIT(5)
37 
38 /* QUSB2PHY_PLL_COMMON_STATUS_ONE register bits */
39 #define CORE_READY_STATUS		BIT(0)
40 
41 /* QUSB2PHY_PORT_POWERDOWN register bits */
42 #define CLAMP_N_EN			BIT(5)
43 #define FREEZIO_N			BIT(1)
44 #define POWER_DOWN			BIT(0)
45 
46 /* QUSB2PHY_PWR_CTRL1 register bits */
47 #define PWR_CTRL1_VREF_SUPPLY_TRIM	BIT(5)
48 #define PWR_CTRL1_CLAMP_N_EN		BIT(1)
49 
50 #define QUSB2PHY_REFCLK_ENABLE		BIT(0)
51 
52 #define PHY_CLK_SCHEME_SEL		BIT(0)
53 
54 /* QUSB2PHY_INTR_CTRL register bits */
55 #define DMSE_INTR_HIGH_SEL			BIT(4)
56 #define DPSE_INTR_HIGH_SEL			BIT(3)
57 #define CHG_DET_INTR_EN				BIT(2)
58 #define DMSE_INTR_EN				BIT(1)
59 #define DPSE_INTR_EN				BIT(0)
60 
61 /* QUSB2PHY_PLL_CORE_INPUT_OVERRIDE register bits */
62 #define CORE_PLL_EN_FROM_RESET			BIT(4)
63 #define CORE_RESET				BIT(5)
64 #define CORE_RESET_MUX				BIT(6)
65 
66 /* QUSB2PHY_IMP_CTRL1 register bits */
67 #define IMP_RES_OFFSET_MASK			GENMASK(5, 0)
68 #define IMP_RES_OFFSET_SHIFT			0x0
69 
70 /* QUSB2PHY_PLL_BIAS_CONTROL_2 register bits */
71 #define BIAS_CTRL2_RES_OFFSET_MASK		GENMASK(5, 0)
72 #define BIAS_CTRL2_RES_OFFSET_SHIFT		0x0
73 
74 /* QUSB2PHY_CHG_CONTROL_2 register bits */
75 #define CHG_CTRL2_OFFSET_MASK			GENMASK(5, 4)
76 #define CHG_CTRL2_OFFSET_SHIFT			0x4
77 
78 /* QUSB2PHY_PORT_TUNE1 register bits */
79 #define HSTX_TRIM_MASK				GENMASK(7, 4)
80 #define HSTX_TRIM_SHIFT				0x4
81 #define PREEMPH_WIDTH_HALF_BIT			BIT(2)
82 #define PREEMPHASIS_EN_MASK			GENMASK(1, 0)
83 #define PREEMPHASIS_EN_SHIFT			0x0
84 
85 /* QUSB2PHY_PORT_TUNE2 register bits */
86 #define HSDISC_TRIM_MASK			GENMASK(1, 0)
87 #define HSDISC_TRIM_SHIFT			0x0
88 
89 #define QUSB2PHY_PLL_ANALOG_CONTROLS_TWO	0x04
90 #define QUSB2PHY_PLL_CLOCK_INVERTERS		0x18c
91 #define QUSB2PHY_PLL_CMODE			0x2c
92 #define QUSB2PHY_PLL_LOCK_DELAY			0x184
93 #define QUSB2PHY_PLL_DIGITAL_TIMERS_TWO		0xb4
94 #define QUSB2PHY_PLL_BIAS_CONTROL_1		0x194
95 #define QUSB2PHY_PLL_BIAS_CONTROL_2		0x198
96 #define QUSB2PHY_PWR_CTRL2			0x214
97 #define QUSB2PHY_IMP_CTRL1			0x220
98 #define QUSB2PHY_IMP_CTRL2			0x224
99 #define QUSB2PHY_CHG_CTRL2			0x23c
100 
101 struct qusb2_phy_init_tbl {
102 	unsigned int offset;
103 	unsigned int val;
104 	/*
105 	 * register part of layout ?
106 	 * if yes, then offset gives index in the reg-layout
107 	 */
108 	int in_layout;
109 };
110 
111 #define QUSB2_PHY_INIT_CFG(o, v) \
112 	{			\
113 		.offset = o,	\
114 		.val = v,	\
115 	}
116 
117 #define QUSB2_PHY_INIT_CFG_L(o, v) \
118 	{			\
119 		.offset = o,	\
120 		.val = v,	\
121 		.in_layout = 1,	\
122 	}
123 
124 /* set of registers with offsets different per-PHY */
125 enum qusb2phy_reg_layout {
126 	QUSB2PHY_PLL_CORE_INPUT_OVERRIDE,
127 	QUSB2PHY_PLL_STATUS,
128 	QUSB2PHY_PORT_TUNE1,
129 	QUSB2PHY_PORT_TUNE2,
130 	QUSB2PHY_PORT_TUNE3,
131 	QUSB2PHY_PORT_TUNE4,
132 	QUSB2PHY_PORT_TUNE5,
133 	QUSB2PHY_PORT_TEST1,
134 	QUSB2PHY_PORT_TEST2,
135 	QUSB2PHY_PORT_POWERDOWN,
136 	QUSB2PHY_INTR_CTRL,
137 };
138 
139 static const struct qusb2_phy_init_tbl ipq6018_init_tbl[] = {
140 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL, 0x14),
141 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE1, 0xF8),
142 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE2, 0xB3),
143 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE3, 0x83),
144 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE4, 0xC0),
145 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_TUNE, 0x30),
146 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL1, 0x79),
147 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL2, 0x21),
148 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE5, 0x00),
149 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_PWR_CTRL, 0x00),
150 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TEST2, 0x14),
151 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_TEST, 0x80),
152 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_AUTOPGM_CTL1, 0x9F),
153 };
154 
155 static const unsigned int ipq6018_regs_layout[] = {
156 	[QUSB2PHY_PLL_STATUS]              = 0x38,
157 	[QUSB2PHY_PORT_TUNE1]              = 0x80,
158 	[QUSB2PHY_PORT_TUNE2]              = 0x84,
159 	[QUSB2PHY_PORT_TUNE3]              = 0x88,
160 	[QUSB2PHY_PORT_TUNE4]              = 0x8C,
161 	[QUSB2PHY_PORT_TUNE5]              = 0x90,
162 	[QUSB2PHY_PORT_TEST1]              = 0x98,
163 	[QUSB2PHY_PORT_TEST2]              = 0x9C,
164 	[QUSB2PHY_PORT_POWERDOWN]          = 0xB4,
165 	[QUSB2PHY_INTR_CTRL]               = 0xBC,
166 };
167 
168 static const unsigned int msm8996_regs_layout[] = {
169 	[QUSB2PHY_PLL_STATUS]		= 0x38,
170 	[QUSB2PHY_PORT_TUNE1]		= 0x80,
171 	[QUSB2PHY_PORT_TUNE2]		= 0x84,
172 	[QUSB2PHY_PORT_TUNE3]		= 0x88,
173 	[QUSB2PHY_PORT_TUNE4]		= 0x8c,
174 	[QUSB2PHY_PORT_TUNE5]		= 0x90,
175 	[QUSB2PHY_PORT_TEST1]		= 0xb8,
176 	[QUSB2PHY_PORT_TEST2]		= 0x9c,
177 	[QUSB2PHY_PORT_POWERDOWN]	= 0xb4,
178 	[QUSB2PHY_INTR_CTRL]		= 0xbc,
179 };
180 
181 static const struct qusb2_phy_init_tbl msm8996_init_tbl[] = {
182 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE1, 0xf8),
183 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE2, 0xb3),
184 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE3, 0x83),
185 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE4, 0xc0),
186 
187 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_TUNE, 0x30),
188 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL1, 0x79),
189 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL2, 0x21),
190 
191 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TEST2, 0x14),
192 
193 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_AUTOPGM_CTL1, 0x9f),
194 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_PWR_CTRL, 0x00),
195 };
196 
197 static const unsigned int msm8998_regs_layout[] = {
198 	[QUSB2PHY_PLL_CORE_INPUT_OVERRIDE] = 0xa8,
199 	[QUSB2PHY_PLL_STATUS]              = 0x1a0,
200 	[QUSB2PHY_PORT_TUNE1]              = 0x23c,
201 	[QUSB2PHY_PORT_TUNE2]              = 0x240,
202 	[QUSB2PHY_PORT_TUNE3]              = 0x244,
203 	[QUSB2PHY_PORT_TUNE4]              = 0x248,
204 	[QUSB2PHY_PORT_TEST1]              = 0x24c,
205 	[QUSB2PHY_PORT_TEST2]              = 0x250,
206 	[QUSB2PHY_PORT_POWERDOWN]          = 0x210,
207 	[QUSB2PHY_INTR_CTRL]               = 0x22c,
208 };
209 
210 static const struct qusb2_phy_init_tbl msm8998_init_tbl[] = {
211 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_ANALOG_CONTROLS_TWO, 0x13),
212 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_CLOCK_INVERTERS, 0x7c),
213 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_CMODE, 0x80),
214 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_LOCK_DELAY, 0x0a),
215 
216 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE1, 0xa5),
217 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE2, 0x09),
218 
219 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_DIGITAL_TIMERS_TWO, 0x19),
220 };
221 
222 static const struct qusb2_phy_init_tbl sm6115_init_tbl[] = {
223 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE1, 0xf8),
224 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE2, 0x53),
225 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE3, 0x81),
226 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE4, 0x17),
227 
228 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_TUNE, 0x30),
229 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL1, 0x79),
230 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL2, 0x21),
231 
232 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TEST2, 0x14),
233 
234 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_AUTOPGM_CTL1, 0x9f),
235 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_PWR_CTRL, 0x00),
236 };
237 
238 static const unsigned int qusb2_v2_regs_layout[] = {
239 	[QUSB2PHY_PLL_CORE_INPUT_OVERRIDE] = 0xa8,
240 	[QUSB2PHY_PLL_STATUS]		= 0x1a0,
241 	[QUSB2PHY_PORT_TUNE1]		= 0x240,
242 	[QUSB2PHY_PORT_TUNE2]		= 0x244,
243 	[QUSB2PHY_PORT_TUNE3]		= 0x248,
244 	[QUSB2PHY_PORT_TUNE4]		= 0x24c,
245 	[QUSB2PHY_PORT_TUNE5]		= 0x250,
246 	[QUSB2PHY_PORT_TEST1]		= 0x254,
247 	[QUSB2PHY_PORT_TEST2]		= 0x258,
248 	[QUSB2PHY_PORT_POWERDOWN]	= 0x210,
249 	[QUSB2PHY_INTR_CTRL]		= 0x230,
250 };
251 
252 static const struct qusb2_phy_init_tbl qusb2_v2_init_tbl[] = {
253 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_ANALOG_CONTROLS_TWO, 0x03),
254 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_CLOCK_INVERTERS, 0x7c),
255 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_CMODE, 0x80),
256 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_LOCK_DELAY, 0x0a),
257 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_DIGITAL_TIMERS_TWO, 0x19),
258 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_BIAS_CONTROL_1, 0x40),
259 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_BIAS_CONTROL_2, 0x20),
260 	QUSB2_PHY_INIT_CFG(QUSB2PHY_PWR_CTRL2, 0x21),
261 	QUSB2_PHY_INIT_CFG(QUSB2PHY_IMP_CTRL1, 0x0),
262 	QUSB2_PHY_INIT_CFG(QUSB2PHY_IMP_CTRL2, 0x58),
263 
264 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE1, 0x30),
265 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE2, 0x29),
266 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE3, 0xca),
267 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE4, 0x04),
268 	QUSB2_PHY_INIT_CFG_L(QUSB2PHY_PORT_TUNE5, 0x03),
269 
270 	QUSB2_PHY_INIT_CFG(QUSB2PHY_CHG_CTRL2, 0x0),
271 };
272 
273 struct qusb2_phy_cfg {
274 	const struct qusb2_phy_init_tbl *tbl;
275 	/* number of entries in the table */
276 	unsigned int tbl_num;
277 	/* offset to PHY_CLK_SCHEME register in TCSR map */
278 	unsigned int clk_scheme_offset;
279 
280 	/* array of registers with different offsets */
281 	const unsigned int *regs;
282 	unsigned int mask_core_ready;
283 	unsigned int disable_ctrl;
284 	unsigned int autoresume_en;
285 
286 	/* true if PHY has PLL_TEST register to select clk_scheme */
287 	bool has_pll_test;
288 
289 	/* true if TUNE1 register must be updated by fused value, else TUNE2 */
290 	bool update_tune1_with_efuse;
291 
292 	/* true if PHY has PLL_CORE_INPUT_OVERRIDE register to reset PLL */
293 	bool has_pll_override;
294 
295 	/* true if PHY default clk scheme is single-ended */
296 	bool se_clk_scheme_default;
297 };
298 
299 static const struct qusb2_phy_cfg msm8996_phy_cfg = {
300 	.tbl		= msm8996_init_tbl,
301 	.tbl_num	= ARRAY_SIZE(msm8996_init_tbl),
302 	.regs		= msm8996_regs_layout,
303 
304 	.has_pll_test	= true,
305 	.se_clk_scheme_default = true,
306 	.disable_ctrl	= (CLAMP_N_EN | FREEZIO_N | POWER_DOWN),
307 	.mask_core_ready = PLL_LOCKED,
308 	.autoresume_en	 = BIT(3),
309 };
310 
311 static const struct qusb2_phy_cfg msm8998_phy_cfg = {
312 	.tbl            = msm8998_init_tbl,
313 	.tbl_num        = ARRAY_SIZE(msm8998_init_tbl),
314 	.regs           = msm8998_regs_layout,
315 
316 	.disable_ctrl   = POWER_DOWN,
317 	.mask_core_ready = CORE_READY_STATUS,
318 	.has_pll_override = true,
319 	.se_clk_scheme_default = true,
320 	.autoresume_en   = BIT(0),
321 	.update_tune1_with_efuse = true,
322 };
323 
324 static const struct qusb2_phy_cfg ipq6018_phy_cfg = {
325 	.tbl            = ipq6018_init_tbl,
326 	.tbl_num        = ARRAY_SIZE(ipq6018_init_tbl),
327 	.regs           = ipq6018_regs_layout,
328 
329 	.disable_ctrl   = POWER_DOWN,
330 	.mask_core_ready = PLL_LOCKED,
331 	/* autoresume not used */
332 	.autoresume_en   = BIT(0),
333 };
334 
335 static const struct qusb2_phy_cfg qusb2_v2_phy_cfg = {
336 	.tbl		= qusb2_v2_init_tbl,
337 	.tbl_num	= ARRAY_SIZE(qusb2_v2_init_tbl),
338 	.regs		= qusb2_v2_regs_layout,
339 
340 	.disable_ctrl	= (PWR_CTRL1_VREF_SUPPLY_TRIM | PWR_CTRL1_CLAMP_N_EN |
341 			   POWER_DOWN),
342 	.mask_core_ready = CORE_READY_STATUS,
343 	.has_pll_override = true,
344 	.se_clk_scheme_default = true,
345 	.autoresume_en	  = BIT(0),
346 	.update_tune1_with_efuse = true,
347 };
348 
349 static const struct qusb2_phy_cfg sdm660_phy_cfg = {
350 	.tbl		= msm8996_init_tbl,
351 	.tbl_num	= ARRAY_SIZE(msm8996_init_tbl),
352 	.regs		= msm8996_regs_layout,
353 
354 	.has_pll_test	= true,
355 	.se_clk_scheme_default = false,
356 	.disable_ctrl	= (CLAMP_N_EN | FREEZIO_N | POWER_DOWN),
357 	.mask_core_ready = PLL_LOCKED,
358 	.autoresume_en	 = BIT(3),
359 };
360 
361 static const struct qusb2_phy_cfg sm6115_phy_cfg = {
362 	.tbl		= sm6115_init_tbl,
363 	.tbl_num	= ARRAY_SIZE(sm6115_init_tbl),
364 	.regs		= msm8996_regs_layout,
365 
366 	.has_pll_test	= true,
367 	.se_clk_scheme_default = true,
368 	.disable_ctrl	= (CLAMP_N_EN | FREEZIO_N | POWER_DOWN),
369 	.mask_core_ready = PLL_LOCKED,
370 	.autoresume_en	 = BIT(3),
371 };
372 
373 static const char * const qusb2_phy_vreg_names[] = {
374 	"vdd", "vdda-pll", "vdda-phy-dpdm",
375 };
376 
377 #define QUSB2_NUM_VREGS		ARRAY_SIZE(qusb2_phy_vreg_names)
378 
379 /* struct override_param - structure holding qusb2 v2 phy overriding param
380  * set override true if the  device tree property exists and read and assign
381  * to value
382  */
383 struct override_param {
384 	bool override;
385 	u8 value;
386 };
387 
388 /*struct override_params - structure holding qusb2 v2 phy overriding params
389  * @imp_res_offset: rescode offset to be updated in IMP_CTRL1 register
390  * @hstx_trim: HSTX_TRIM to be updated in TUNE1 register
391  * @preemphasis: Amplitude Pre-Emphasis to be updated in TUNE1 register
392  * @preemphasis_width: half/full-width Pre-Emphasis updated via TUNE1
393  * @bias_ctrl: bias ctrl to be updated in BIAS_CONTROL_2 register
394  * @charge_ctrl: charge ctrl to be updated in CHG_CTRL2 register
395  * @hsdisc_trim: disconnect threshold to be updated in TUNE2 register
396  */
397 struct override_params {
398 	struct override_param imp_res_offset;
399 	struct override_param hstx_trim;
400 	struct override_param preemphasis;
401 	struct override_param preemphasis_width;
402 	struct override_param bias_ctrl;
403 	struct override_param charge_ctrl;
404 	struct override_param hsdisc_trim;
405 };
406 
407 /**
408  * struct qusb2_phy - structure holding qusb2 phy attributes
409  *
410  * @phy: generic phy
411  * @base: iomapped memory space for qubs2 phy
412  *
413  * @cfg_ahb_clk: AHB2PHY interface clock
414  * @ref_clk: phy reference clock
415  * @iface_clk: phy interface clock
416  * @phy_reset: phy reset control
417  * @vregs: regulator supplies bulk data
418  *
419  * @tcsr: TCSR syscon register map
420  * @cell: nvmem cell containing phy tuning value
421  *
422  * @overrides: pointer to structure for all overriding tuning params
423  *
424  * @cfg: phy config data
425  * @has_se_clk_scheme: indicate if PHY has single-ended ref clock scheme
426  * @phy_initialized: indicate if PHY has been initialized
427  * @mode: current PHY mode
428  */
429 struct qusb2_phy {
430 	struct phy *phy;
431 	void __iomem *base;
432 
433 	struct clk *cfg_ahb_clk;
434 	struct clk *ref_clk;
435 	struct clk *iface_clk;
436 	struct reset_control *phy_reset;
437 	struct regulator_bulk_data vregs[QUSB2_NUM_VREGS];
438 
439 	struct regmap *tcsr;
440 	struct nvmem_cell *cell;
441 
442 	struct override_params overrides;
443 
444 	const struct qusb2_phy_cfg *cfg;
445 	bool has_se_clk_scheme;
446 	bool phy_initialized;
447 	enum phy_mode mode;
448 };
449 
450 static inline void qusb2_write_mask(void __iomem *base, u32 offset,
451 				    u32 val, u32 mask)
452 {
453 	u32 reg;
454 
455 	reg = readl(base + offset);
456 	reg &= ~mask;
457 	reg |= val & mask;
458 	writel(reg, base + offset);
459 
460 	/* Ensure above write is completed */
461 	readl(base + offset);
462 }
463 
464 static inline void qusb2_setbits(void __iomem *base, u32 offset, u32 val)
465 {
466 	u32 reg;
467 
468 	reg = readl(base + offset);
469 	reg |= val;
470 	writel(reg, base + offset);
471 
472 	/* Ensure above write is completed */
473 	readl(base + offset);
474 }
475 
476 static inline void qusb2_clrbits(void __iomem *base, u32 offset, u32 val)
477 {
478 	u32 reg;
479 
480 	reg = readl(base + offset);
481 	reg &= ~val;
482 	writel(reg, base + offset);
483 
484 	/* Ensure above write is completed */
485 	readl(base + offset);
486 }
487 
488 static inline
489 void qcom_qusb2_phy_configure(void __iomem *base,
490 			      const unsigned int *regs,
491 			      const struct qusb2_phy_init_tbl tbl[], int num)
492 {
493 	int i;
494 
495 	for (i = 0; i < num; i++) {
496 		if (tbl[i].in_layout)
497 			writel(tbl[i].val, base + regs[tbl[i].offset]);
498 		else
499 			writel(tbl[i].val, base + tbl[i].offset);
500 	}
501 }
502 
503 /*
504  * Update board specific PHY tuning override values if specified from
505  * device tree.
506  */
507 static void qusb2_phy_override_phy_params(struct qusb2_phy *qphy)
508 {
509 	const struct qusb2_phy_cfg *cfg = qphy->cfg;
510 	struct override_params *or = &qphy->overrides;
511 
512 	if (or->imp_res_offset.override)
513 		qusb2_write_mask(qphy->base, QUSB2PHY_IMP_CTRL1,
514 		or->imp_res_offset.value << IMP_RES_OFFSET_SHIFT,
515 			     IMP_RES_OFFSET_MASK);
516 
517 	if (or->bias_ctrl.override)
518 		qusb2_write_mask(qphy->base, QUSB2PHY_PLL_BIAS_CONTROL_2,
519 		or->bias_ctrl.value << BIAS_CTRL2_RES_OFFSET_SHIFT,
520 			   BIAS_CTRL2_RES_OFFSET_MASK);
521 
522 	if (or->charge_ctrl.override)
523 		qusb2_write_mask(qphy->base, QUSB2PHY_CHG_CTRL2,
524 		or->charge_ctrl.value << CHG_CTRL2_OFFSET_SHIFT,
525 			     CHG_CTRL2_OFFSET_MASK);
526 
527 	if (or->hstx_trim.override)
528 		qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE1],
529 		or->hstx_trim.value << HSTX_TRIM_SHIFT,
530 				 HSTX_TRIM_MASK);
531 
532 	if (or->preemphasis.override)
533 		qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE1],
534 		or->preemphasis.value << PREEMPHASIS_EN_SHIFT,
535 				PREEMPHASIS_EN_MASK);
536 
537 	if (or->preemphasis_width.override) {
538 		if (or->preemphasis_width.value ==
539 		    QUSB2_V2_PREEMPHASIS_WIDTH_HALF_BIT)
540 			qusb2_setbits(qphy->base,
541 				      cfg->regs[QUSB2PHY_PORT_TUNE1],
542 				      PREEMPH_WIDTH_HALF_BIT);
543 		else
544 			qusb2_clrbits(qphy->base,
545 				      cfg->regs[QUSB2PHY_PORT_TUNE1],
546 				      PREEMPH_WIDTH_HALF_BIT);
547 	}
548 
549 	if (or->hsdisc_trim.override)
550 		qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE2],
551 		or->hsdisc_trim.value << HSDISC_TRIM_SHIFT,
552 				 HSDISC_TRIM_MASK);
553 }
554 
555 /*
556  * Fetches HS Tx tuning value from nvmem and sets the
557  * QUSB2PHY_PORT_TUNE1/2 register.
558  * For error case, skip setting the value and use the default value.
559  */
560 static void qusb2_phy_set_tune2_param(struct qusb2_phy *qphy)
561 {
562 	struct device *dev = &qphy->phy->dev;
563 	const struct qusb2_phy_cfg *cfg = qphy->cfg;
564 	u8 *val, hstx_trim;
565 
566 	/* efuse register is optional */
567 	if (!qphy->cell)
568 		return;
569 
570 	/*
571 	 * Read efuse register having TUNE2/1 parameter's high nibble.
572 	 * If efuse register shows value as 0x0 (indicating value is not
573 	 * fused), or if we fail to find a valid efuse register setting,
574 	 * then use default value for high nibble that we have already
575 	 * set while configuring the phy.
576 	 */
577 	val = nvmem_cell_read(qphy->cell, NULL);
578 	if (IS_ERR(val)) {
579 		dev_dbg(dev, "failed to read a valid hs-tx trim value\n");
580 		return;
581 	}
582 	hstx_trim = val[0];
583 	kfree(val);
584 	if (!hstx_trim) {
585 		dev_dbg(dev, "failed to read a valid hs-tx trim value\n");
586 		return;
587 	}
588 
589 	/* Fused TUNE1/2 value is the higher nibble only */
590 	if (cfg->update_tune1_with_efuse)
591 		qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE1],
592 				 hstx_trim << HSTX_TRIM_SHIFT, HSTX_TRIM_MASK);
593 	else
594 		qusb2_write_mask(qphy->base, cfg->regs[QUSB2PHY_PORT_TUNE2],
595 				 hstx_trim << HSTX_TRIM_SHIFT, HSTX_TRIM_MASK);
596 }
597 
598 static int qusb2_phy_set_mode(struct phy *phy,
599 			      enum phy_mode mode, int submode)
600 {
601 	struct qusb2_phy *qphy = phy_get_drvdata(phy);
602 
603 	qphy->mode = mode;
604 
605 	return 0;
606 }
607 
608 static int __maybe_unused qusb2_phy_runtime_suspend(struct device *dev)
609 {
610 	struct qusb2_phy *qphy = dev_get_drvdata(dev);
611 	const struct qusb2_phy_cfg *cfg = qphy->cfg;
612 	u32 intr_mask;
613 
614 	dev_vdbg(dev, "Suspending QUSB2 Phy, mode:%d\n", qphy->mode);
615 
616 	if (!qphy->phy_initialized) {
617 		dev_vdbg(dev, "PHY not initialized, bailing out\n");
618 		return 0;
619 	}
620 
621 	/*
622 	 * Enable DP/DM interrupts to detect line state changes based on current
623 	 * speed. In other words, enable the triggers _opposite_ of what the
624 	 * current D+/D- levels are e.g. if currently D+ high, D- low
625 	 * (HS 'J'/Suspend), configure the mask to trigger on D+ low OR D- high
626 	 */
627 	intr_mask = DPSE_INTR_EN | DMSE_INTR_EN;
628 	switch (qphy->mode) {
629 	case PHY_MODE_USB_HOST_HS:
630 	case PHY_MODE_USB_HOST_FS:
631 	case PHY_MODE_USB_DEVICE_HS:
632 	case PHY_MODE_USB_DEVICE_FS:
633 		intr_mask |= DMSE_INTR_HIGH_SEL;
634 		break;
635 	case PHY_MODE_USB_HOST_LS:
636 	case PHY_MODE_USB_DEVICE_LS:
637 		intr_mask |= DPSE_INTR_HIGH_SEL;
638 		break;
639 	default:
640 		/* No device connected, enable both DP/DM high interrupt */
641 		intr_mask |= DMSE_INTR_HIGH_SEL;
642 		intr_mask |= DPSE_INTR_HIGH_SEL;
643 		break;
644 	}
645 
646 	writel(intr_mask, qphy->base + cfg->regs[QUSB2PHY_INTR_CTRL]);
647 
648 	/* hold core PLL into reset */
649 	if (cfg->has_pll_override) {
650 		qusb2_setbits(qphy->base,
651 			      cfg->regs[QUSB2PHY_PLL_CORE_INPUT_OVERRIDE],
652 			      CORE_PLL_EN_FROM_RESET | CORE_RESET |
653 			      CORE_RESET_MUX);
654 	}
655 
656 	/* enable phy auto-resume only if device is connected on bus */
657 	if (qphy->mode != PHY_MODE_INVALID) {
658 		qusb2_setbits(qphy->base, cfg->regs[QUSB2PHY_PORT_TEST1],
659 			      cfg->autoresume_en);
660 		/* Autoresume bit has to be toggled in order to enable it */
661 		qusb2_clrbits(qphy->base, cfg->regs[QUSB2PHY_PORT_TEST1],
662 			      cfg->autoresume_en);
663 	}
664 
665 	if (!qphy->has_se_clk_scheme)
666 		clk_disable_unprepare(qphy->ref_clk);
667 
668 	clk_disable_unprepare(qphy->cfg_ahb_clk);
669 	clk_disable_unprepare(qphy->iface_clk);
670 
671 	return 0;
672 }
673 
674 static int __maybe_unused qusb2_phy_runtime_resume(struct device *dev)
675 {
676 	struct qusb2_phy *qphy = dev_get_drvdata(dev);
677 	const struct qusb2_phy_cfg *cfg = qphy->cfg;
678 	int ret;
679 
680 	dev_vdbg(dev, "Resuming QUSB2 phy, mode:%d\n", qphy->mode);
681 
682 	if (!qphy->phy_initialized) {
683 		dev_vdbg(dev, "PHY not initialized, bailing out\n");
684 		return 0;
685 	}
686 
687 	ret = clk_prepare_enable(qphy->iface_clk);
688 	if (ret) {
689 		dev_err(dev, "failed to enable iface_clk, %d\n", ret);
690 		return ret;
691 	}
692 
693 	ret = clk_prepare_enable(qphy->cfg_ahb_clk);
694 	if (ret) {
695 		dev_err(dev, "failed to enable cfg ahb clock, %d\n", ret);
696 		goto disable_iface_clk;
697 	}
698 
699 	if (!qphy->has_se_clk_scheme) {
700 		ret = clk_prepare_enable(qphy->ref_clk);
701 		if (ret) {
702 			dev_err(dev, "failed to enable ref clk, %d\n", ret);
703 			goto disable_ahb_clk;
704 		}
705 	}
706 
707 	writel(0x0, qphy->base + cfg->regs[QUSB2PHY_INTR_CTRL]);
708 
709 	/* bring core PLL out of reset */
710 	if (cfg->has_pll_override) {
711 		qusb2_clrbits(qphy->base,
712 			      cfg->regs[QUSB2PHY_PLL_CORE_INPUT_OVERRIDE],
713 			      CORE_RESET | CORE_RESET_MUX);
714 	}
715 
716 	return 0;
717 
718 disable_ahb_clk:
719 	clk_disable_unprepare(qphy->cfg_ahb_clk);
720 disable_iface_clk:
721 	clk_disable_unprepare(qphy->iface_clk);
722 
723 	return ret;
724 }
725 
726 static int qusb2_phy_init(struct phy *phy)
727 {
728 	struct qusb2_phy *qphy = phy_get_drvdata(phy);
729 	const struct qusb2_phy_cfg *cfg = qphy->cfg;
730 	unsigned int val = 0;
731 	unsigned int clk_scheme;
732 	int ret;
733 
734 	dev_vdbg(&phy->dev, "%s(): Initializing QUSB2 phy\n", __func__);
735 
736 	/* turn on regulator supplies */
737 	ret = regulator_bulk_enable(ARRAY_SIZE(qphy->vregs), qphy->vregs);
738 	if (ret)
739 		return ret;
740 
741 	ret = clk_prepare_enable(qphy->iface_clk);
742 	if (ret) {
743 		dev_err(&phy->dev, "failed to enable iface_clk, %d\n", ret);
744 		goto poweroff_phy;
745 	}
746 
747 	/* enable ahb interface clock to program phy */
748 	ret = clk_prepare_enable(qphy->cfg_ahb_clk);
749 	if (ret) {
750 		dev_err(&phy->dev, "failed to enable cfg ahb clock, %d\n", ret);
751 		goto disable_iface_clk;
752 	}
753 
754 	/* Perform phy reset */
755 	ret = reset_control_assert(qphy->phy_reset);
756 	if (ret) {
757 		dev_err(&phy->dev, "failed to assert phy_reset, %d\n", ret);
758 		goto disable_ahb_clk;
759 	}
760 
761 	/* 100 us delay to keep PHY in reset mode */
762 	usleep_range(100, 150);
763 
764 	ret = reset_control_deassert(qphy->phy_reset);
765 	if (ret) {
766 		dev_err(&phy->dev, "failed to de-assert phy_reset, %d\n", ret);
767 		goto disable_ahb_clk;
768 	}
769 
770 	/* Disable the PHY */
771 	qusb2_setbits(qphy->base, cfg->regs[QUSB2PHY_PORT_POWERDOWN],
772 		      qphy->cfg->disable_ctrl);
773 
774 	if (cfg->has_pll_test) {
775 		/* save reset value to override reference clock scheme later */
776 		val = readl(qphy->base + QUSB2PHY_PLL_TEST);
777 	}
778 
779 	qcom_qusb2_phy_configure(qphy->base, cfg->regs, cfg->tbl,
780 				 cfg->tbl_num);
781 
782 	/* Override board specific PHY tuning values */
783 	qusb2_phy_override_phy_params(qphy);
784 
785 	/* Set efuse value for tuning the PHY */
786 	qusb2_phy_set_tune2_param(qphy);
787 
788 	/* Enable the PHY */
789 	qusb2_clrbits(qphy->base, cfg->regs[QUSB2PHY_PORT_POWERDOWN],
790 		      POWER_DOWN);
791 
792 	/* Required to get phy pll lock successfully */
793 	usleep_range(150, 160);
794 
795 	/*
796 	 * Not all the SoCs have got a readable TCSR_PHY_CLK_SCHEME
797 	 * register in the TCSR so, if there's none, use the default
798 	 * value hardcoded in the configuration.
799 	 */
800 	qphy->has_se_clk_scheme = cfg->se_clk_scheme_default;
801 
802 	/*
803 	 * read TCSR_PHY_CLK_SCHEME register to check if single-ended
804 	 * clock scheme is selected. If yes, then disable differential
805 	 * ref_clk and use single-ended clock, otherwise use differential
806 	 * ref_clk only.
807 	 */
808 	if (qphy->tcsr) {
809 		ret = regmap_read(qphy->tcsr, qphy->cfg->clk_scheme_offset,
810 				  &clk_scheme);
811 		if (ret) {
812 			dev_err(&phy->dev, "failed to read clk scheme reg\n");
813 			goto assert_phy_reset;
814 		}
815 
816 		/* is it a differential clock scheme ? */
817 		if (!(clk_scheme & PHY_CLK_SCHEME_SEL)) {
818 			dev_vdbg(&phy->dev, "%s(): select differential clk\n",
819 				 __func__);
820 			qphy->has_se_clk_scheme = false;
821 		} else {
822 			dev_vdbg(&phy->dev, "%s(): select single-ended clk\n",
823 				 __func__);
824 		}
825 	}
826 
827 	if (!qphy->has_se_clk_scheme) {
828 		ret = clk_prepare_enable(qphy->ref_clk);
829 		if (ret) {
830 			dev_err(&phy->dev, "failed to enable ref clk, %d\n",
831 				ret);
832 			goto assert_phy_reset;
833 		}
834 	}
835 
836 	if (cfg->has_pll_test) {
837 		if (!qphy->has_se_clk_scheme)
838 			val &= ~CLK_REF_SEL;
839 		else
840 			val |= CLK_REF_SEL;
841 
842 		writel(val, qphy->base + QUSB2PHY_PLL_TEST);
843 
844 		/* ensure above write is through */
845 		readl(qphy->base + QUSB2PHY_PLL_TEST);
846 	}
847 
848 	/* Required to get phy pll lock successfully */
849 	usleep_range(100, 110);
850 
851 	val = readb(qphy->base + cfg->regs[QUSB2PHY_PLL_STATUS]);
852 	if (!(val & cfg->mask_core_ready)) {
853 		dev_err(&phy->dev,
854 			"QUSB2PHY pll lock failed: status reg = %x\n", val);
855 		ret = -EBUSY;
856 		goto disable_ref_clk;
857 	}
858 	qphy->phy_initialized = true;
859 
860 	return 0;
861 
862 disable_ref_clk:
863 	if (!qphy->has_se_clk_scheme)
864 		clk_disable_unprepare(qphy->ref_clk);
865 assert_phy_reset:
866 	reset_control_assert(qphy->phy_reset);
867 disable_ahb_clk:
868 	clk_disable_unprepare(qphy->cfg_ahb_clk);
869 disable_iface_clk:
870 	clk_disable_unprepare(qphy->iface_clk);
871 poweroff_phy:
872 	regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs);
873 
874 	return ret;
875 }
876 
877 static int qusb2_phy_exit(struct phy *phy)
878 {
879 	struct qusb2_phy *qphy = phy_get_drvdata(phy);
880 
881 	/* Disable the PHY */
882 	qusb2_setbits(qphy->base, qphy->cfg->regs[QUSB2PHY_PORT_POWERDOWN],
883 		      qphy->cfg->disable_ctrl);
884 
885 	if (!qphy->has_se_clk_scheme)
886 		clk_disable_unprepare(qphy->ref_clk);
887 
888 	reset_control_assert(qphy->phy_reset);
889 
890 	clk_disable_unprepare(qphy->cfg_ahb_clk);
891 	clk_disable_unprepare(qphy->iface_clk);
892 
893 	regulator_bulk_disable(ARRAY_SIZE(qphy->vregs), qphy->vregs);
894 
895 	qphy->phy_initialized = false;
896 
897 	return 0;
898 }
899 
900 static const struct phy_ops qusb2_phy_gen_ops = {
901 	.init		= qusb2_phy_init,
902 	.exit		= qusb2_phy_exit,
903 	.set_mode	= qusb2_phy_set_mode,
904 	.owner		= THIS_MODULE,
905 };
906 
907 static const struct of_device_id qusb2_phy_of_match_table[] = {
908 	{
909 		.compatible	= "qcom,ipq6018-qusb2-phy",
910 		.data		= &ipq6018_phy_cfg,
911 	}, {
912 		.compatible	= "qcom,ipq8074-qusb2-phy",
913 		.data		= &msm8996_phy_cfg,
914 	}, {
915 		.compatible	= "qcom,ipq9574-qusb2-phy",
916 		.data		= &ipq6018_phy_cfg,
917 	}, {
918 		.compatible	= "qcom,msm8953-qusb2-phy",
919 		.data		= &msm8996_phy_cfg,
920 	}, {
921 		.compatible	= "qcom,msm8996-qusb2-phy",
922 		.data		= &msm8996_phy_cfg,
923 	}, {
924 		.compatible	= "qcom,msm8998-qusb2-phy",
925 		.data		= &msm8998_phy_cfg,
926 	}, {
927 		.compatible	= "qcom,qcm2290-qusb2-phy",
928 		.data		= &sm6115_phy_cfg,
929 	}, {
930 		.compatible	= "qcom,sdm660-qusb2-phy",
931 		.data		= &sdm660_phy_cfg,
932 	}, {
933 		.compatible	= "qcom,sm4250-qusb2-phy",
934 		.data		= &sm6115_phy_cfg,
935 	}, {
936 		.compatible	= "qcom,sm6115-qusb2-phy",
937 		.data		= &sm6115_phy_cfg,
938 	}, {
939 		/*
940 		 * Deprecated. Only here to support legacy device
941 		 * trees that didn't include "qcom,qusb2-v2-phy"
942 		 */
943 		.compatible	= "qcom,sdm845-qusb2-phy",
944 		.data		= &qusb2_v2_phy_cfg,
945 	}, {
946 		.compatible	= "qcom,qusb2-v2-phy",
947 		.data		= &qusb2_v2_phy_cfg,
948 	},
949 	{ },
950 };
951 MODULE_DEVICE_TABLE(of, qusb2_phy_of_match_table);
952 
953 static const struct dev_pm_ops qusb2_phy_pm_ops = {
954 	SET_RUNTIME_PM_OPS(qusb2_phy_runtime_suspend,
955 			   qusb2_phy_runtime_resume, NULL)
956 };
957 
958 static int qusb2_phy_probe(struct platform_device *pdev)
959 {
960 	struct device *dev = &pdev->dev;
961 	struct qusb2_phy *qphy;
962 	struct phy_provider *phy_provider;
963 	struct phy *generic_phy;
964 	int ret, i;
965 	int num;
966 	u32 value;
967 	struct override_params *or;
968 
969 	qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL);
970 	if (!qphy)
971 		return -ENOMEM;
972 	or = &qphy->overrides;
973 
974 	qphy->base = devm_platform_ioremap_resource(pdev, 0);
975 	if (IS_ERR(qphy->base))
976 		return PTR_ERR(qphy->base);
977 
978 	qphy->cfg_ahb_clk = devm_clk_get(dev, "cfg_ahb");
979 	if (IS_ERR(qphy->cfg_ahb_clk))
980 		return dev_err_probe(dev, PTR_ERR(qphy->cfg_ahb_clk),
981 				     "failed to get cfg ahb clk\n");
982 
983 	qphy->ref_clk = devm_clk_get(dev, "ref");
984 	if (IS_ERR(qphy->ref_clk))
985 		return dev_err_probe(dev, PTR_ERR(qphy->ref_clk),
986 				     "failed to get ref clk\n");
987 
988 	qphy->iface_clk = devm_clk_get_optional(dev, "iface");
989 	if (IS_ERR(qphy->iface_clk))
990 		return PTR_ERR(qphy->iface_clk);
991 
992 	qphy->phy_reset = devm_reset_control_get_by_index(&pdev->dev, 0);
993 	if (IS_ERR(qphy->phy_reset)) {
994 		dev_err(dev, "failed to get phy core reset\n");
995 		return PTR_ERR(qphy->phy_reset);
996 	}
997 
998 	num = ARRAY_SIZE(qphy->vregs);
999 	for (i = 0; i < num; i++)
1000 		qphy->vregs[i].supply = qusb2_phy_vreg_names[i];
1001 
1002 	ret = devm_regulator_bulk_get(dev, num, qphy->vregs);
1003 	if (ret)
1004 		return dev_err_probe(dev, ret,
1005 				     "failed to get regulator supplies\n");
1006 
1007 	/* Get the specific init parameters of QMP phy */
1008 	qphy->cfg = of_device_get_match_data(dev);
1009 
1010 	qphy->tcsr = syscon_regmap_lookup_by_phandle(dev->of_node,
1011 							"qcom,tcsr-syscon");
1012 	if (IS_ERR(qphy->tcsr)) {
1013 		dev_dbg(dev, "failed to lookup TCSR regmap\n");
1014 		qphy->tcsr = NULL;
1015 	}
1016 
1017 	qphy->cell = devm_nvmem_cell_get(dev, NULL);
1018 	if (IS_ERR(qphy->cell)) {
1019 		if (PTR_ERR(qphy->cell) == -EPROBE_DEFER)
1020 			return -EPROBE_DEFER;
1021 		qphy->cell = NULL;
1022 		dev_dbg(dev, "failed to lookup tune2 hstx trim value\n");
1023 	}
1024 
1025 	if (!of_property_read_u32(dev->of_node, "qcom,imp-res-offset-value",
1026 				  &value)) {
1027 		or->imp_res_offset.value = (u8)value;
1028 		or->imp_res_offset.override = true;
1029 	}
1030 
1031 	if (!of_property_read_u32(dev->of_node, "qcom,bias-ctrl-value",
1032 				  &value)) {
1033 		or->bias_ctrl.value = (u8)value;
1034 		or->bias_ctrl.override = true;
1035 	}
1036 
1037 	if (!of_property_read_u32(dev->of_node, "qcom,charge-ctrl-value",
1038 				  &value)) {
1039 		or->charge_ctrl.value = (u8)value;
1040 		or->charge_ctrl.override = true;
1041 	}
1042 
1043 	if (!of_property_read_u32(dev->of_node, "qcom,hstx-trim-value",
1044 				  &value)) {
1045 		or->hstx_trim.value = (u8)value;
1046 		or->hstx_trim.override = true;
1047 	}
1048 
1049 	if (!of_property_read_u32(dev->of_node, "qcom,preemphasis-level",
1050 				     &value)) {
1051 		or->preemphasis.value = (u8)value;
1052 		or->preemphasis.override = true;
1053 	}
1054 
1055 	if (!of_property_read_u32(dev->of_node, "qcom,preemphasis-width",
1056 				     &value)) {
1057 		or->preemphasis_width.value = (u8)value;
1058 		or->preemphasis_width.override = true;
1059 	}
1060 
1061 	if (!of_property_read_u32(dev->of_node, "qcom,hsdisc-trim-value",
1062 				  &value)) {
1063 		or->hsdisc_trim.value = (u8)value;
1064 		or->hsdisc_trim.override = true;
1065 	}
1066 
1067 	pm_runtime_set_active(dev);
1068 	pm_runtime_enable(dev);
1069 	/*
1070 	 * Prevent runtime pm from being ON by default. Users can enable
1071 	 * it using power/control in sysfs.
1072 	 */
1073 	pm_runtime_forbid(dev);
1074 
1075 	generic_phy = devm_phy_create(dev, NULL, &qusb2_phy_gen_ops);
1076 	if (IS_ERR(generic_phy)) {
1077 		ret = PTR_ERR(generic_phy);
1078 		dev_err(dev, "failed to create phy, %d\n", ret);
1079 		pm_runtime_disable(dev);
1080 		return ret;
1081 	}
1082 	qphy->phy = generic_phy;
1083 
1084 	dev_set_drvdata(dev, qphy);
1085 	phy_set_drvdata(generic_phy, qphy);
1086 
1087 	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
1088 	if (!IS_ERR(phy_provider))
1089 		dev_info(dev, "Registered Qcom-QUSB2 phy\n");
1090 	else
1091 		pm_runtime_disable(dev);
1092 
1093 	return PTR_ERR_OR_ZERO(phy_provider);
1094 }
1095 
1096 static struct platform_driver qusb2_phy_driver = {
1097 	.probe		= qusb2_phy_probe,
1098 	.driver = {
1099 		.name	= "qcom-qusb2-phy",
1100 		.pm	= &qusb2_phy_pm_ops,
1101 		.of_match_table = qusb2_phy_of_match_table,
1102 	},
1103 };
1104 
1105 module_platform_driver(qusb2_phy_driver);
1106 
1107 MODULE_AUTHOR("Vivek Gautam <vivek.gautam@codeaurora.org>");
1108 MODULE_DESCRIPTION("Qualcomm QUSB2 PHY driver");
1109 MODULE_LICENSE("GPL v2");
1110