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Linux 4.18.10
[linux/fpc-iii.git] / drivers / phy / mediatek / phy-mtk-xsphy.c
blob020cd0227397f58d0478632631ef9f9377303ac7
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * MediaTek USB3.1 gen2 xsphy Driver
4 *
5 * Copyright (c) 2018 MediaTek Inc.
6 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
7 *
8 */
9
10 #include <dt-bindings/phy/phy.h>
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/io.h>
14 #include <linux/iopoll.h>
15 #include <linux/module.h>
16 #include <linux/of_address.h>
17 #include <linux/phy/phy.h>
18 #include <linux/platform_device.h>
19
20 /* u2 phy banks */
21 #define SSUSB_SIFSLV_MISC 0x000
22 #define SSUSB_SIFSLV_U2FREQ 0x100
23 #define SSUSB_SIFSLV_U2PHY_COM 0x300
24
25 /* u3 phy shared banks */
26 #define SSPXTP_SIFSLV_DIG_GLB 0x000
27 #define SSPXTP_SIFSLV_PHYA_GLB 0x100
28
29 /* u3 phy banks */
30 #define SSPXTP_SIFSLV_DIG_LN_TOP 0x000
31 #define SSPXTP_SIFSLV_DIG_LN_TX0 0x100
32 #define SSPXTP_SIFSLV_DIG_LN_RX0 0x200
33 #define SSPXTP_SIFSLV_DIG_LN_DAIF 0x300
34 #define SSPXTP_SIFSLV_PHYA_LN 0x400
35
36 #define XSP_U2FREQ_FMCR0 ((SSUSB_SIFSLV_U2FREQ) + 0x00)
37 #define P2F_RG_FREQDET_EN BIT(24)
38 #define P2F_RG_CYCLECNT GENMASK(23, 0)
39 #define P2F_RG_CYCLECNT_VAL(x) ((P2F_RG_CYCLECNT) & (x))
40
41 #define XSP_U2FREQ_MMONR0 ((SSUSB_SIFSLV_U2FREQ) + 0x0c)
42
43 #define XSP_U2FREQ_FMMONR1 ((SSUSB_SIFSLV_U2FREQ) + 0x10)
44 #define P2F_RG_FRCK_EN BIT(8)
45 #define P2F_USB_FM_VALID BIT(0)
46
47 #define XSP_USBPHYACR0 ((SSUSB_SIFSLV_U2PHY_COM) + 0x00)
48 #define P2A0_RG_INTR_EN BIT(5)
49
50 #define XSP_USBPHYACR1 ((SSUSB_SIFSLV_U2PHY_COM) + 0x04)
51 #define P2A1_RG_INTR_CAL GENMASK(23, 19)
52 #define P2A1_RG_INTR_CAL_VAL(x) ((0x1f & (x)) << 19)
53 #define P2A1_RG_VRT_SEL GENMASK(14, 12)
54 #define P2A1_RG_VRT_SEL_VAL(x) ((0x7 & (x)) << 12)
55 #define P2A1_RG_TERM_SEL GENMASK(10, 8)
56 #define P2A1_RG_TERM_SEL_VAL(x) ((0x7 & (x)) << 8)
57
58 #define XSP_USBPHYACR5 ((SSUSB_SIFSLV_U2PHY_COM) + 0x014)
59 #define P2A5_RG_HSTX_SRCAL_EN BIT(15)
60 #define P2A5_RG_HSTX_SRCTRL GENMASK(14, 12)
61 #define P2A5_RG_HSTX_SRCTRL_VAL(x) ((0x7 & (x)) << 12)
62
63 #define XSP_USBPHYACR6 ((SSUSB_SIFSLV_U2PHY_COM) + 0x018)
64 #define P2A6_RG_BC11_SW_EN BIT(23)
65 #define P2A6_RG_OTG_VBUSCMP_EN BIT(20)
66
67 #define XSP_U2PHYDTM1 ((SSUSB_SIFSLV_U2PHY_COM) + 0x06C)
68 #define P2D_FORCE_IDDIG BIT(9)
69 #define P2D_RG_VBUSVALID BIT(5)
70 #define P2D_RG_SESSEND BIT(4)
71 #define P2D_RG_AVALID BIT(2)
72 #define P2D_RG_IDDIG BIT(1)
73
74 #define SSPXTP_PHYA_GLB_00 ((SSPXTP_SIFSLV_PHYA_GLB) + 0x00)
75 #define RG_XTP_GLB_BIAS_INTR_CTRL GENMASK(21, 16)
76 #define RG_XTP_GLB_BIAS_INTR_CTRL_VAL(x) ((0x3f & (x)) << 16)
77
78 #define SSPXTP_PHYA_LN_04 ((SSPXTP_SIFSLV_PHYA_LN) + 0x04)
79 #define RG_XTP_LN0_TX_IMPSEL GENMASK(4, 0)
80 #define RG_XTP_LN0_TX_IMPSEL_VAL(x) (0x1f & (x))
81
82 #define SSPXTP_PHYA_LN_14 ((SSPXTP_SIFSLV_PHYA_LN) + 0x014)
83 #define RG_XTP_LN0_RX_IMPSEL GENMASK(4, 0)
84 #define RG_XTP_LN0_RX_IMPSEL_VAL(x) (0x1f & (x))
85
86 #define XSP_REF_CLK 26 /* MHZ */
87 #define XSP_SLEW_RATE_COEF 17
88 #define XSP_SR_COEF_DIVISOR 1000
89 #define XSP_FM_DET_CYCLE_CNT 1024
90
91 struct xsphy_instance {
92 struct phy *phy;
93 void __iomem *port_base;
94 struct clk *ref_clk; /* reference clock of anolog phy */
95 u32 index;
96 u32 type;
97 /* only for HQA test */
98 int efuse_intr;
99 int efuse_tx_imp;
100 int efuse_rx_imp;
101 /* u2 eye diagram */
102 int eye_src;
103 int eye_vrt;
104 int eye_term;
105 };
106
107 struct mtk_xsphy {
108 struct device *dev;
109 void __iomem *glb_base; /* only shared u3 sif */
110 struct xsphy_instance **phys;
111 int nphys;
112 int src_ref_clk; /* MHZ, reference clock for slew rate calibrate */
113 int src_coef; /* coefficient for slew rate calibrate */
114 };
115
116 static void u2_phy_slew_rate_calibrate(struct mtk_xsphy *xsphy,
117 struct xsphy_instance *inst)
118 {
119 void __iomem *pbase = inst->port_base;
120 int calib_val;
121 int fm_out;
122 u32 tmp;
123
124 /* use force value */
125 if (inst->eye_src)
126 return;
127
128 /* enable USB ring oscillator */
129 tmp = readl(pbase + XSP_USBPHYACR5);
130 tmp |= P2A5_RG_HSTX_SRCAL_EN;
131 writel(tmp, pbase + XSP_USBPHYACR5);
132 udelay(1); /* wait clock stable */
133
134 /* enable free run clock */
135 tmp = readl(pbase + XSP_U2FREQ_FMMONR1);
136 tmp |= P2F_RG_FRCK_EN;
137 writel(tmp, pbase + XSP_U2FREQ_FMMONR1);
138
139 /* set cycle count as 1024 */
140 tmp = readl(pbase + XSP_U2FREQ_FMCR0);
141 tmp &= ~(P2F_RG_CYCLECNT);
142 tmp |= P2F_RG_CYCLECNT_VAL(XSP_FM_DET_CYCLE_CNT);
143 writel(tmp, pbase + XSP_U2FREQ_FMCR0);
144
145 /* enable frequency meter */
146 tmp = readl(pbase + XSP_U2FREQ_FMCR0);
147 tmp |= P2F_RG_FREQDET_EN;
148 writel(tmp, pbase + XSP_U2FREQ_FMCR0);
149
150 /* ignore return value */
151 readl_poll_timeout(pbase + XSP_U2FREQ_FMMONR1, tmp,
152 (tmp & P2F_USB_FM_VALID), 10, 200);
153
154 fm_out = readl(pbase + XSP_U2FREQ_MMONR0);
155
156 /* disable frequency meter */
157 tmp = readl(pbase + XSP_U2FREQ_FMCR0);
158 tmp &= ~P2F_RG_FREQDET_EN;
159 writel(tmp, pbase + XSP_U2FREQ_FMCR0);
160
161 /* disable free run clock */
162 tmp = readl(pbase + XSP_U2FREQ_FMMONR1);
163 tmp &= ~P2F_RG_FRCK_EN;
164 writel(tmp, pbase + XSP_U2FREQ_FMMONR1);
165
166 if (fm_out) {
167 /* (1024 / FM_OUT) x reference clock frequency x coefficient */
168 tmp = xsphy->src_ref_clk * xsphy->src_coef;
169 tmp = (tmp * XSP_FM_DET_CYCLE_CNT) / fm_out;
170 calib_val = DIV_ROUND_CLOSEST(tmp, XSP_SR_COEF_DIVISOR);
171 } else {
172 /* if FM detection fail, set default value */
173 calib_val = 3;
174 }
175 dev_dbg(xsphy->dev, "phy.%d, fm_out:%d, calib:%d (clk:%d, coef:%d)\n",
176 inst->index, fm_out, calib_val,
177 xsphy->src_ref_clk, xsphy->src_coef);
178
179 /* set HS slew rate */
180 tmp = readl(pbase + XSP_USBPHYACR5);
181 tmp &= ~P2A5_RG_HSTX_SRCTRL;
182 tmp |= P2A5_RG_HSTX_SRCTRL_VAL(calib_val);
183 writel(tmp, pbase + XSP_USBPHYACR5);
184
185 /* disable USB ring oscillator */
186 tmp = readl(pbase + XSP_USBPHYACR5);
187 tmp &= ~P2A5_RG_HSTX_SRCAL_EN;
188 writel(tmp, pbase + XSP_USBPHYACR5);
189 }
190
191 static void u2_phy_instance_init(struct mtk_xsphy *xsphy,
192 struct xsphy_instance *inst)
193 {
194 void __iomem *pbase = inst->port_base;
195 u32 tmp;
196
197 /* DP/DM BC1.1 path Disable */
198 tmp = readl(pbase + XSP_USBPHYACR6);
199 tmp &= ~P2A6_RG_BC11_SW_EN;
200 writel(tmp, pbase + XSP_USBPHYACR6);
201
202 tmp = readl(pbase + XSP_USBPHYACR0);
203 tmp |= P2A0_RG_INTR_EN;
204 writel(tmp, pbase + XSP_USBPHYACR0);
205 }
206
207 static void u2_phy_instance_power_on(struct mtk_xsphy *xsphy,
208 struct xsphy_instance *inst)
209 {
210 void __iomem *pbase = inst->port_base;
211 u32 index = inst->index;
212 u32 tmp;
213
214 tmp = readl(pbase + XSP_USBPHYACR6);
215 tmp |= P2A6_RG_OTG_VBUSCMP_EN;
216 writel(tmp, pbase + XSP_USBPHYACR6);
217
218 tmp = readl(pbase + XSP_U2PHYDTM1);
219 tmp |= P2D_RG_VBUSVALID | P2D_RG_AVALID;
220 tmp &= ~P2D_RG_SESSEND;
221 writel(tmp, pbase + XSP_U2PHYDTM1);
222
223 dev_dbg(xsphy->dev, "%s(%d)\n", __func__, index);
224 }
225
226 static void u2_phy_instance_power_off(struct mtk_xsphy *xsphy,
227 struct xsphy_instance *inst)
228 {
229 void __iomem *pbase = inst->port_base;
230 u32 index = inst->index;
231 u32 tmp;
232
233 tmp = readl(pbase + XSP_USBPHYACR6);
234 tmp &= ~P2A6_RG_OTG_VBUSCMP_EN;
235 writel(tmp, pbase + XSP_USBPHYACR6);
236
237 tmp = readl(pbase + XSP_U2PHYDTM1);
238 tmp &= ~(P2D_RG_VBUSVALID | P2D_RG_AVALID);
239 tmp |= P2D_RG_SESSEND;
240 writel(tmp, pbase + XSP_U2PHYDTM1);
241
242 dev_dbg(xsphy->dev, "%s(%d)\n", __func__, index);
243 }
244
245 static void u2_phy_instance_set_mode(struct mtk_xsphy *xsphy,
246 struct xsphy_instance *inst,
247 enum phy_mode mode)
248 {
249 u32 tmp;
250
251 tmp = readl(inst->port_base + XSP_U2PHYDTM1);
252 switch (mode) {
253 case PHY_MODE_USB_DEVICE:
254 tmp |= P2D_FORCE_IDDIG | P2D_RG_IDDIG;
255 break;
256 case PHY_MODE_USB_HOST:
257 tmp |= P2D_FORCE_IDDIG;
258 tmp &= ~P2D_RG_IDDIG;
259 break;
260 case PHY_MODE_USB_OTG:
261 tmp &= ~(P2D_FORCE_IDDIG | P2D_RG_IDDIG);
262 break;
263 default:
264 return;
265 }
266 writel(tmp, inst->port_base + XSP_U2PHYDTM1);
267 }
268
269 static void phy_parse_property(struct mtk_xsphy *xsphy,
270 struct xsphy_instance *inst)
271 {
272 struct device *dev = &inst->phy->dev;
273
274 switch (inst->type) {
275 case PHY_TYPE_USB2:
276 device_property_read_u32(dev, "mediatek,efuse-intr",
277 &inst->efuse_intr);
278 device_property_read_u32(dev, "mediatek,eye-src",
279 &inst->eye_src);
280 device_property_read_u32(dev, "mediatek,eye-vrt",
281 &inst->eye_vrt);
282 device_property_read_u32(dev, "mediatek,eye-term",
283 &inst->eye_term);
284 dev_dbg(dev, "intr:%d, src:%d, vrt:%d, term:%d\n",
285 inst->efuse_intr, inst->eye_src,
286 inst->eye_vrt, inst->eye_term);
287 break;
288 case PHY_TYPE_USB3:
289 device_property_read_u32(dev, "mediatek,efuse-intr",
290 &inst->efuse_intr);
291 device_property_read_u32(dev, "mediatek,efuse-tx-imp",
292 &inst->efuse_tx_imp);
293 device_property_read_u32(dev, "mediatek,efuse-rx-imp",
294 &inst->efuse_rx_imp);
295 dev_dbg(dev, "intr:%d, tx-imp:%d, rx-imp:%d\n",
296 inst->efuse_intr, inst->efuse_tx_imp,
297 inst->efuse_rx_imp);
298 break;
299 default:
300 dev_err(xsphy->dev, "incompatible phy type\n");
301 return;
302 }
303 }
304
305 static void u2_phy_props_set(struct mtk_xsphy *xsphy,
306 struct xsphy_instance *inst)
307 {
308 void __iomem *pbase = inst->port_base;
309 u32 tmp;
310
311 if (inst->efuse_intr) {
312 tmp = readl(pbase + XSP_USBPHYACR1);
313 tmp &= ~P2A1_RG_INTR_CAL;
314 tmp |= P2A1_RG_INTR_CAL_VAL(inst->efuse_intr);
315 writel(tmp, pbase + XSP_USBPHYACR1);
316 }
317
318 if (inst->eye_src) {
319 tmp = readl(pbase + XSP_USBPHYACR5);
320 tmp &= ~P2A5_RG_HSTX_SRCTRL;
321 tmp |= P2A5_RG_HSTX_SRCTRL_VAL(inst->eye_src);
322 writel(tmp, pbase + XSP_USBPHYACR5);
323 }
324
325 if (inst->eye_vrt) {
326 tmp = readl(pbase + XSP_USBPHYACR1);
327 tmp &= ~P2A1_RG_VRT_SEL;
328 tmp |= P2A1_RG_VRT_SEL_VAL(inst->eye_vrt);
329 writel(tmp, pbase + XSP_USBPHYACR1);
330 }
331
332 if (inst->eye_term) {
333 tmp = readl(pbase + XSP_USBPHYACR1);
334 tmp &= ~P2A1_RG_TERM_SEL;
335 tmp |= P2A1_RG_TERM_SEL_VAL(inst->eye_term);
336 writel(tmp, pbase + XSP_USBPHYACR1);
337 }
338 }
339
340 static void u3_phy_props_set(struct mtk_xsphy *xsphy,
341 struct xsphy_instance *inst)
342 {
343 void __iomem *pbase = inst->port_base;
344 u32 tmp;
345
346 if (inst->efuse_intr) {
347 tmp = readl(xsphy->glb_base + SSPXTP_PHYA_GLB_00);
348 tmp &= ~RG_XTP_GLB_BIAS_INTR_CTRL;
349 tmp |= RG_XTP_GLB_BIAS_INTR_CTRL_VAL(inst->efuse_intr);
350 writel(tmp, xsphy->glb_base + SSPXTP_PHYA_GLB_00);
351 }
352
353 if (inst->efuse_tx_imp) {
354 tmp = readl(pbase + SSPXTP_PHYA_LN_04);
355 tmp &= ~RG_XTP_LN0_TX_IMPSEL;
356 tmp |= RG_XTP_LN0_TX_IMPSEL_VAL(inst->efuse_tx_imp);
357 writel(tmp, pbase + SSPXTP_PHYA_LN_04);
358 }
359
360 if (inst->efuse_rx_imp) {
361 tmp = readl(pbase + SSPXTP_PHYA_LN_14);
362 tmp &= ~RG_XTP_LN0_RX_IMPSEL;
363 tmp |= RG_XTP_LN0_RX_IMPSEL_VAL(inst->efuse_rx_imp);
364 writel(tmp, pbase + SSPXTP_PHYA_LN_14);
365 }
366 }
367
368 static int mtk_phy_init(struct phy *phy)
369 {
370 struct xsphy_instance *inst = phy_get_drvdata(phy);
371 struct mtk_xsphy *xsphy = dev_get_drvdata(phy->dev.parent);
372 int ret;
373
374 ret = clk_prepare_enable(inst->ref_clk);
375 if (ret) {
376 dev_err(xsphy->dev, "failed to enable ref_clk\n");
377 return ret;
378 }
379
380 switch (inst->type) {
381 case PHY_TYPE_USB2:
382 u2_phy_instance_init(xsphy, inst);
383 u2_phy_props_set(xsphy, inst);
384 break;
385 case PHY_TYPE_USB3:
386 u3_phy_props_set(xsphy, inst);
387 break;
388 default:
389 dev_err(xsphy->dev, "incompatible phy type\n");
390 clk_disable_unprepare(inst->ref_clk);
391 return -EINVAL;
392 }
393
394 return 0;
395 }
396
397 static int mtk_phy_power_on(struct phy *phy)
398 {
399 struct xsphy_instance *inst = phy_get_drvdata(phy);
400 struct mtk_xsphy *xsphy = dev_get_drvdata(phy->dev.parent);
401
402 if (inst->type == PHY_TYPE_USB2) {
403 u2_phy_instance_power_on(xsphy, inst);
404 u2_phy_slew_rate_calibrate(xsphy, inst);
405 }
406
407 return 0;
408 }
409
410 static int mtk_phy_power_off(struct phy *phy)
411 {
412 struct xsphy_instance *inst = phy_get_drvdata(phy);
413 struct mtk_xsphy *xsphy = dev_get_drvdata(phy->dev.parent);
414
415 if (inst->type == PHY_TYPE_USB2)
416 u2_phy_instance_power_off(xsphy, inst);
417
418 return 0;
419 }
420
421 static int mtk_phy_exit(struct phy *phy)
422 {
423 struct xsphy_instance *inst = phy_get_drvdata(phy);
424
425 clk_disable_unprepare(inst->ref_clk);
426 return 0;
427 }
428
429 static int mtk_phy_set_mode(struct phy *phy, enum phy_mode mode)
430 {
431 struct xsphy_instance *inst = phy_get_drvdata(phy);
432 struct mtk_xsphy *xsphy = dev_get_drvdata(phy->dev.parent);
433
434 if (inst->type == PHY_TYPE_USB2)
435 u2_phy_instance_set_mode(xsphy, inst, mode);
436
437 return 0;
438 }
439
440 static struct phy *mtk_phy_xlate(struct device *dev,
441 struct of_phandle_args *args)
442 {
443 struct mtk_xsphy *xsphy = dev_get_drvdata(dev);
444 struct xsphy_instance *inst = NULL;
445 struct device_node *phy_np = args->np;
446 int index;
447
448 if (args->args_count != 1) {
449 dev_err(dev, "invalid number of cells in 'phy' property\n");
450 return ERR_PTR(-EINVAL);
451 }
452
453 for (index = 0; index < xsphy->nphys; index++)
454 if (phy_np == xsphy->phys[index]->phy->dev.of_node) {
455 inst = xsphy->phys[index];
456 break;
457 }
458
459 if (!inst) {
460 dev_err(dev, "failed to find appropriate phy\n");
461 return ERR_PTR(-EINVAL);
462 }
463
464 inst->type = args->args[0];
465 if (!(inst->type == PHY_TYPE_USB2 ||
466 inst->type == PHY_TYPE_USB3)) {
467 dev_err(dev, "unsupported phy type: %d\n", inst->type);
468 return ERR_PTR(-EINVAL);
469 }
470
471 phy_parse_property(xsphy, inst);
472
473 return inst->phy;
474 }
475
476 static const struct phy_ops mtk_xsphy_ops = {
477 .init = mtk_phy_init,
478 .exit = mtk_phy_exit,
479 .power_on = mtk_phy_power_on,
480 .power_off = mtk_phy_power_off,
481 .set_mode = mtk_phy_set_mode,
482 .owner = THIS_MODULE,
483 };
484
485 static const struct of_device_id mtk_xsphy_id_table[] = {
486 { .compatible = "mediatek,xsphy", },
487 { },
488 };
489 MODULE_DEVICE_TABLE(of, mtk_xsphy_id_table);
490
491 static int mtk_xsphy_probe(struct platform_device *pdev)
492 {
493 struct device *dev = &pdev->dev;
494 struct device_node *np = dev->of_node;
495 struct device_node *child_np;
496 struct phy_provider *provider;
497 struct resource *glb_res;
498 struct mtk_xsphy *xsphy;
499 struct resource res;
500 int port, retval;
501
502 xsphy = devm_kzalloc(dev, sizeof(*xsphy), GFP_KERNEL);
503 if (!xsphy)
504 return -ENOMEM;
505
506 xsphy->nphys = of_get_child_count(np);
507 xsphy->phys = devm_kcalloc(dev, xsphy->nphys,
508 sizeof(*xsphy->phys), GFP_KERNEL);
509 if (!xsphy->phys)
510 return -ENOMEM;
511
512 xsphy->dev = dev;
513 platform_set_drvdata(pdev, xsphy);
514
515 glb_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
516 /* optional, may not exist if no u3 phys */
517 if (glb_res) {
518 /* get banks shared by multiple u3 phys */
519 xsphy->glb_base = devm_ioremap_resource(dev, glb_res);
520 if (IS_ERR(xsphy->glb_base)) {
521 dev_err(dev, "failed to remap glb regs\n");
522 return PTR_ERR(xsphy->glb_base);
523 }
524 }
525
526 xsphy->src_ref_clk = XSP_REF_CLK;
527 xsphy->src_coef = XSP_SLEW_RATE_COEF;
528 /* update parameters of slew rate calibrate if exist */
529 device_property_read_u32(dev, "mediatek,src-ref-clk-mhz",
530 &xsphy->src_ref_clk);
531 device_property_read_u32(dev, "mediatek,src-coef", &xsphy->src_coef);
532
533 port = 0;
534 for_each_child_of_node(np, child_np) {
535 struct xsphy_instance *inst;
536 struct phy *phy;
537
538 inst = devm_kzalloc(dev, sizeof(*inst), GFP_KERNEL);
539 if (!inst) {
540 retval = -ENOMEM;
541 goto put_child;
542 }
543
544 xsphy->phys[port] = inst;
545
546 phy = devm_phy_create(dev, child_np, &mtk_xsphy_ops);
547 if (IS_ERR(phy)) {
548 dev_err(dev, "failed to create phy\n");
549 retval = PTR_ERR(phy);
550 goto put_child;
551 }
552
553 retval = of_address_to_resource(child_np, 0, &res);
554 if (retval) {
555 dev_err(dev, "failed to get address resource(id-%d)\n",
556 port);
557 goto put_child;
558 }
559
560 inst->port_base = devm_ioremap_resource(&phy->dev, &res);
561 if (IS_ERR(inst->port_base)) {
562 dev_err(dev, "failed to remap phy regs\n");
563 retval = PTR_ERR(inst->port_base);
564 goto put_child;
565 }
566
567 inst->phy = phy;
568 inst->index = port;
569 phy_set_drvdata(phy, inst);
570 port++;
571
572 inst->ref_clk = devm_clk_get(&phy->dev, "ref");
573 if (IS_ERR(inst->ref_clk)) {
574 dev_err(dev, "failed to get ref_clk(id-%d)\n", port);
575 retval = PTR_ERR(inst->ref_clk);
576 goto put_child;
577 }
578 }
579
580 provider = devm_of_phy_provider_register(dev, mtk_phy_xlate);
581 return PTR_ERR_OR_ZERO(provider);
582
583 put_child:
584 of_node_put(child_np);
585 return retval;
586 }
587
588 static struct platform_driver mtk_xsphy_driver = {
589 .probe = mtk_xsphy_probe,
590 .driver = {
591 .name = "mtk-xsphy",
592 .of_match_table = mtk_xsphy_id_table,
593 },
594 };
595
596 module_platform_driver(mtk_xsphy_driver);
597
598 MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
599 MODULE_DESCRIPTION("MediaTek USB XS-PHY driver");
600 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support