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Merge branch 'drm-tda998x-devel' of git://git.armlinux.org.uk/~rmk/linux-arm into...
[deliverable/linux.git] / drivers / phy / phy-ti-pipe3.c
1 /*
2 * phy-ti-pipe3 - PIPE3 PHY driver.
3 *
4 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * Author: Kishon Vijay Abraham I <kishon@ti.com>
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 */
18
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/slab.h>
22 #include <linux/phy/phy.h>
23 #include <linux/of.h>
24 #include <linux/clk.h>
25 #include <linux/err.h>
26 #include <linux/io.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/delay.h>
29 #include <linux/phy/omap_control_phy.h>
30 #include <linux/of_platform.h>
31 #include <linux/mfd/syscon.h>
32 #include <linux/regmap.h>
33
34 #define PLL_STATUS 0x00000004
35 #define PLL_GO 0x00000008
36 #define PLL_CONFIGURATION1 0x0000000C
37 #define PLL_CONFIGURATION2 0x00000010
38 #define PLL_CONFIGURATION3 0x00000014
39 #define PLL_CONFIGURATION4 0x00000020
40
41 #define PLL_REGM_MASK 0x001FFE00
42 #define PLL_REGM_SHIFT 0x9
43 #define PLL_REGM_F_MASK 0x0003FFFF
44 #define PLL_REGM_F_SHIFT 0x0
45 #define PLL_REGN_MASK 0x000001FE
46 #define PLL_REGN_SHIFT 0x1
47 #define PLL_SELFREQDCO_MASK 0x0000000E
48 #define PLL_SELFREQDCO_SHIFT 0x1
49 #define PLL_SD_MASK 0x0003FC00
50 #define PLL_SD_SHIFT 10
51 #define SET_PLL_GO 0x1
52 #define PLL_LDOPWDN BIT(15)
53 #define PLL_TICOPWDN BIT(16)
54 #define PLL_LOCK 0x2
55 #define PLL_IDLE 0x1
56
57 #define SATA_PLL_SOFT_RESET BIT(18)
58
59 #define PIPE3_PHY_PWRCTL_CLK_CMD_MASK 0x003FC000
60 #define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 14
61
62 #define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK 0xFFC00000
63 #define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 22
64
65 #define PIPE3_PHY_TX_RX_POWERON 0x3
66 #define PIPE3_PHY_TX_RX_POWEROFF 0x0
67
68 #define PCIE_PCS_MASK 0xFF0000
69 #define PCIE_PCS_DELAY_COUNT_SHIFT 0x10
70
71 /*
72 * This is an Empirical value that works, need to confirm the actual
73 * value required for the PIPE3PHY_PLL_CONFIGURATION2.PLL_IDLE status
74 * to be correctly reflected in the PIPE3PHY_PLL_STATUS register.
75 */
76 #define PLL_IDLE_TIME 100 /* in milliseconds */
77 #define PLL_LOCK_TIME 100 /* in milliseconds */
78
79 struct pipe3_dpll_params {
80 u16 m;
81 u8 n;
82 u8 freq:3;
83 u8 sd;
84 u32 mf;
85 };
86
87 struct pipe3_dpll_map {
88 unsigned long rate;
89 struct pipe3_dpll_params params;
90 };
91
92 struct ti_pipe3 {
93 void __iomem *pll_ctrl_base;
94 struct device *dev;
95 struct device *control_dev;
96 struct clk *wkupclk;
97 struct clk *sys_clk;
98 struct clk *refclk;
99 struct clk *div_clk;
100 struct pipe3_dpll_map *dpll_map;
101 struct regmap *phy_power_syscon; /* ctrl. reg. acces */
102 struct regmap *pcs_syscon; /* ctrl. reg. acces */
103 struct regmap *dpll_reset_syscon; /* ctrl. reg. acces */
104 unsigned int dpll_reset_reg; /* reg. index within syscon */
105 unsigned int power_reg; /* power reg. index within syscon */
106 unsigned int pcie_pcs_reg; /* pcs reg. index in syscon */
107 bool sata_refclk_enabled;
108 };
109
110 static struct pipe3_dpll_map dpll_map_usb[] = {
111 {12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */
112 {16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */
113 {19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */
114 {20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */
115 {26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */
116 {38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */
117 { }, /* Terminator */
118 };
119
120 static struct pipe3_dpll_map dpll_map_sata[] = {
121 {12000000, {1000, 7, 4, 6, 0} }, /* 12 MHz */
122 {16800000, {714, 7, 4, 6, 0} }, /* 16.8 MHz */
123 {19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */
124 {20000000, {600, 7, 4, 6, 0} }, /* 20 MHz */
125 {26000000, {461, 7, 4, 6, 0} }, /* 26 MHz */
126 {38400000, {312, 7, 4, 6, 0} }, /* 38.4 MHz */
127 { }, /* Terminator */
128 };
129
130 static inline u32 ti_pipe3_readl(void __iomem *addr, unsigned offset)
131 {
132 return __raw_readl(addr + offset);
133 }
134
135 static inline void ti_pipe3_writel(void __iomem *addr, unsigned offset,
136 u32 data)
137 {
138 __raw_writel(data, addr + offset);
139 }
140
141 static struct pipe3_dpll_params *ti_pipe3_get_dpll_params(struct ti_pipe3 *phy)
142 {
143 unsigned long rate;
144 struct pipe3_dpll_map *dpll_map = phy->dpll_map;
145
146 rate = clk_get_rate(phy->sys_clk);
147
148 for (; dpll_map->rate; dpll_map++) {
149 if (rate == dpll_map->rate)
150 return &dpll_map->params;
151 }
152
153 dev_err(phy->dev, "No DPLL configuration for %lu Hz SYS CLK\n", rate);
154
155 return NULL;
156 }
157
158 static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy);
159 static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy);
160
161 static int ti_pipe3_power_off(struct phy *x)
162 {
163 u32 val;
164 int ret;
165 struct ti_pipe3 *phy = phy_get_drvdata(x);
166
167 if (!phy->phy_power_syscon) {
168 omap_control_phy_power(phy->control_dev, 0);
169 return 0;
170 }
171
172 val = PIPE3_PHY_TX_RX_POWEROFF << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
173
174 ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
175 PIPE3_PHY_PWRCTL_CLK_CMD_MASK, val);
176 return ret;
177 }
178
179 static int ti_pipe3_power_on(struct phy *x)
180 {
181 u32 val;
182 u32 mask;
183 int ret;
184 unsigned long rate;
185 struct ti_pipe3 *phy = phy_get_drvdata(x);
186
187 if (!phy->phy_power_syscon) {
188 omap_control_phy_power(phy->control_dev, 1);
189 return 0;
190 }
191
192 rate = clk_get_rate(phy->sys_clk);
193 if (!rate) {
194 dev_err(phy->dev, "Invalid clock rate\n");
195 return -EINVAL;
196 }
197 rate = rate / 1000000;
198 mask = OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK |
199 OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK;
200 val = PIPE3_PHY_TX_RX_POWERON << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
201 val |= rate << OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT;
202
203 ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
204 mask, val);
205 return ret;
206 }
207
208 static int ti_pipe3_dpll_wait_lock(struct ti_pipe3 *phy)
209 {
210 u32 val;
211 unsigned long timeout;
212
213 timeout = jiffies + msecs_to_jiffies(PLL_LOCK_TIME);
214 do {
215 cpu_relax();
216 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
217 if (val & PLL_LOCK)
218 return 0;
219 } while (!time_after(jiffies, timeout));
220
221 dev_err(phy->dev, "DPLL failed to lock\n");
222 return -EBUSY;
223 }
224
225 static int ti_pipe3_dpll_program(struct ti_pipe3 *phy)
226 {
227 u32 val;
228 struct pipe3_dpll_params *dpll_params;
229
230 dpll_params = ti_pipe3_get_dpll_params(phy);
231 if (!dpll_params)
232 return -EINVAL;
233
234 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
235 val &= ~PLL_REGN_MASK;
236 val |= dpll_params->n << PLL_REGN_SHIFT;
237 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
238
239 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
240 val &= ~PLL_SELFREQDCO_MASK;
241 val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT;
242 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
243
244 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
245 val &= ~PLL_REGM_MASK;
246 val |= dpll_params->m << PLL_REGM_SHIFT;
247 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
248
249 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4);
250 val &= ~PLL_REGM_F_MASK;
251 val |= dpll_params->mf << PLL_REGM_F_SHIFT;
252 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val);
253
254 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3);
255 val &= ~PLL_SD_MASK;
256 val |= dpll_params->sd << PLL_SD_SHIFT;
257 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val);
258
259 ti_pipe3_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO);
260
261 return ti_pipe3_dpll_wait_lock(phy);
262 }
263
264 static int ti_pipe3_init(struct phy *x)
265 {
266 struct ti_pipe3 *phy = phy_get_drvdata(x);
267 u32 val;
268 int ret = 0;
269
270 ti_pipe3_enable_clocks(phy);
271 /*
272 * Set pcie_pcs register to 0x96 for proper functioning of phy
273 * as recommended in AM572x TRM SPRUHZ6, section 18.5.2.2, table
274 * 18-1804.
275 */
276 if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) {
277 if (!phy->pcs_syscon) {
278 omap_control_pcie_pcs(phy->control_dev, 0x96);
279 return 0;
280 }
281
282 val = 0x96 << OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT;
283 ret = regmap_update_bits(phy->pcs_syscon, phy->pcie_pcs_reg,
284 PCIE_PCS_MASK, val);
285 return ret;
286 }
287
288 /* Bring it out of IDLE if it is IDLE */
289 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
290 if (val & PLL_IDLE) {
291 val &= ~PLL_IDLE;
292 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
293 ret = ti_pipe3_dpll_wait_lock(phy);
294 }
295
296 /* SATA has issues if re-programmed when locked */
297 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
298 if ((val & PLL_LOCK) && of_device_is_compatible(phy->dev->of_node,
299 "ti,phy-pipe3-sata"))
300 return ret;
301
302 /* Program the DPLL */
303 ret = ti_pipe3_dpll_program(phy);
304 if (ret) {
305 ti_pipe3_disable_clocks(phy);
306 return -EINVAL;
307 }
308
309 return ret;
310 }
311
312 static int ti_pipe3_exit(struct phy *x)
313 {
314 struct ti_pipe3 *phy = phy_get_drvdata(x);
315 u32 val;
316 unsigned long timeout;
317
318 /* If dpll_reset_syscon is not present we wont power down SATA DPLL
319 * due to Errata i783
320 */
321 if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata") &&
322 !phy->dpll_reset_syscon)
323 return 0;
324
325 /* PCIe doesn't have internal DPLL */
326 if (!of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) {
327 /* Put DPLL in IDLE mode */
328 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
329 val |= PLL_IDLE;
330 ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
331
332 /* wait for LDO and Oscillator to power down */
333 timeout = jiffies + msecs_to_jiffies(PLL_IDLE_TIME);
334 do {
335 cpu_relax();
336 val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
337 if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN))
338 break;
339 } while (!time_after(jiffies, timeout));
340
341 if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) {
342 dev_err(phy->dev, "Failed to power down: PLL_STATUS 0x%x\n",
343 val);
344 return -EBUSY;
345 }
346 }
347
348 /* i783: SATA needs control bit toggle after PLL unlock */
349 if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata")) {
350 regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg,
351 SATA_PLL_SOFT_RESET, SATA_PLL_SOFT_RESET);
352 regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg,
353 SATA_PLL_SOFT_RESET, 0);
354 }
355
356 ti_pipe3_disable_clocks(phy);
357
358 return 0;
359 }
360 static const struct phy_ops ops = {
361 .init = ti_pipe3_init,
362 .exit = ti_pipe3_exit,
363 .power_on = ti_pipe3_power_on,
364 .power_off = ti_pipe3_power_off,
365 .owner = THIS_MODULE,
366 };
367
368 static const struct of_device_id ti_pipe3_id_table[];
369
370 static int ti_pipe3_get_clk(struct ti_pipe3 *phy)
371 {
372 struct clk *clk;
373 struct device *dev = phy->dev;
374 struct device_node *node = dev->of_node;
375
376 phy->refclk = devm_clk_get(dev, "refclk");
377 if (IS_ERR(phy->refclk)) {
378 dev_err(dev, "unable to get refclk\n");
379 /* older DTBs have missing refclk in SATA PHY
380 * so don't bail out in case of SATA PHY.
381 */
382 if (!of_device_is_compatible(node, "ti,phy-pipe3-sata"))
383 return PTR_ERR(phy->refclk);
384 }
385
386 if (!of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
387 phy->wkupclk = devm_clk_get(dev, "wkupclk");
388 if (IS_ERR(phy->wkupclk)) {
389 dev_err(dev, "unable to get wkupclk\n");
390 return PTR_ERR(phy->wkupclk);
391 }
392 } else {
393 phy->wkupclk = ERR_PTR(-ENODEV);
394 }
395
396 if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie") ||
397 phy->phy_power_syscon) {
398 phy->sys_clk = devm_clk_get(dev, "sysclk");
399 if (IS_ERR(phy->sys_clk)) {
400 dev_err(dev, "unable to get sysclk\n");
401 return -EINVAL;
402 }
403 }
404
405 if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) {
406 clk = devm_clk_get(dev, "dpll_ref");
407 if (IS_ERR(clk)) {
408 dev_err(dev, "unable to get dpll ref clk\n");
409 return PTR_ERR(clk);
410 }
411 clk_set_rate(clk, 1500000000);
412
413 clk = devm_clk_get(dev, "dpll_ref_m2");
414 if (IS_ERR(clk)) {
415 dev_err(dev, "unable to get dpll ref m2 clk\n");
416 return PTR_ERR(clk);
417 }
418 clk_set_rate(clk, 100000000);
419
420 clk = devm_clk_get(dev, "phy-div");
421 if (IS_ERR(clk)) {
422 dev_err(dev, "unable to get phy-div clk\n");
423 return PTR_ERR(clk);
424 }
425 clk_set_rate(clk, 100000000);
426
427 phy->div_clk = devm_clk_get(dev, "div-clk");
428 if (IS_ERR(phy->div_clk)) {
429 dev_err(dev, "unable to get div-clk\n");
430 return PTR_ERR(phy->div_clk);
431 }
432 } else {
433 phy->div_clk = ERR_PTR(-ENODEV);
434 }
435
436 return 0;
437 }
438
439 static int ti_pipe3_get_sysctrl(struct ti_pipe3 *phy)
440 {
441 struct device *dev = phy->dev;
442 struct device_node *node = dev->of_node;
443 struct device_node *control_node;
444 struct platform_device *control_pdev;
445
446 phy->phy_power_syscon = syscon_regmap_lookup_by_phandle(node,
447 "syscon-phy-power");
448 if (IS_ERR(phy->phy_power_syscon)) {
449 dev_dbg(dev,
450 "can't get syscon-phy-power, using control device\n");
451 phy->phy_power_syscon = NULL;
452 } else {
453 if (of_property_read_u32_index(node,
454 "syscon-phy-power", 1,
455 &phy->power_reg)) {
456 dev_err(dev, "couldn't get power reg. offset\n");
457 return -EINVAL;
458 }
459 }
460
461 if (!phy->phy_power_syscon) {
462 control_node = of_parse_phandle(node, "ctrl-module", 0);
463 if (!control_node) {
464 dev_err(dev, "Failed to get control device phandle\n");
465 return -EINVAL;
466 }
467
468 control_pdev = of_find_device_by_node(control_node);
469 if (!control_pdev) {
470 dev_err(dev, "Failed to get control device\n");
471 return -EINVAL;
472 }
473
474 phy->control_dev = &control_pdev->dev;
475 }
476
477 if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) {
478 phy->pcs_syscon = syscon_regmap_lookup_by_phandle(node,
479 "syscon-pcs");
480 if (IS_ERR(phy->pcs_syscon)) {
481 dev_dbg(dev,
482 "can't get syscon-pcs, using omap control\n");
483 phy->pcs_syscon = NULL;
484 } else {
485 if (of_property_read_u32_index(node,
486 "syscon-pcs", 1,
487 &phy->pcie_pcs_reg)) {
488 dev_err(dev,
489 "couldn't get pcie pcs reg. offset\n");
490 return -EINVAL;
491 }
492 }
493 }
494
495 if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
496 phy->dpll_reset_syscon = syscon_regmap_lookup_by_phandle(node,
497 "syscon-pllreset");
498 if (IS_ERR(phy->dpll_reset_syscon)) {
499 dev_info(dev,
500 "can't get syscon-pllreset, sata dpll won't idle\n");
501 phy->dpll_reset_syscon = NULL;
502 } else {
503 if (of_property_read_u32_index(node,
504 "syscon-pllreset", 1,
505 &phy->dpll_reset_reg)) {
506 dev_err(dev,
507 "couldn't get pllreset reg. offset\n");
508 return -EINVAL;
509 }
510 }
511 }
512
513 return 0;
514 }
515
516 static int ti_pipe3_get_pll_base(struct ti_pipe3 *phy)
517 {
518 struct resource *res;
519 const struct of_device_id *match;
520 struct device *dev = phy->dev;
521 struct device_node *node = dev->of_node;
522 struct platform_device *pdev = to_platform_device(dev);
523
524 if (of_device_is_compatible(node, "ti,phy-pipe3-pcie"))
525 return 0;
526
527 match = of_match_device(ti_pipe3_id_table, dev);
528 if (!match)
529 return -EINVAL;
530
531 phy->dpll_map = (struct pipe3_dpll_map *)match->data;
532 if (!phy->dpll_map) {
533 dev_err(dev, "no DPLL data\n");
534 return -EINVAL;
535 }
536
537 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
538 "pll_ctrl");
539 phy->pll_ctrl_base = devm_ioremap_resource(dev, res);
540 if (IS_ERR(phy->pll_ctrl_base))
541 return PTR_ERR(phy->pll_ctrl_base);
542
543 return 0;
544 }
545
546 static int ti_pipe3_probe(struct platform_device *pdev)
547 {
548 struct ti_pipe3 *phy;
549 struct phy *generic_phy;
550 struct phy_provider *phy_provider;
551 struct device_node *node = pdev->dev.of_node;
552 struct device *dev = &pdev->dev;
553 int ret;
554
555 phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
556 if (!phy)
557 return -ENOMEM;
558
559 phy->dev = dev;
560
561 ret = ti_pipe3_get_pll_base(phy);
562 if (ret)
563 return ret;
564
565 ret = ti_pipe3_get_sysctrl(phy);
566 if (ret)
567 return ret;
568
569 ret = ti_pipe3_get_clk(phy);
570 if (ret)
571 return ret;
572
573 platform_set_drvdata(pdev, phy);
574 pm_runtime_enable(dev);
575
576 /*
577 * Prevent auto-disable of refclk for SATA PHY due to Errata i783
578 */
579 if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
580 if (!IS_ERR(phy->refclk)) {
581 clk_prepare_enable(phy->refclk);
582 phy->sata_refclk_enabled = true;
583 }
584 }
585
586 generic_phy = devm_phy_create(dev, NULL, &ops);
587 if (IS_ERR(generic_phy))
588 return PTR_ERR(generic_phy);
589
590 phy_set_drvdata(generic_phy, phy);
591
592 ti_pipe3_power_off(generic_phy);
593
594 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
595 if (IS_ERR(phy_provider))
596 return PTR_ERR(phy_provider);
597
598 return 0;
599 }
600
601 static int ti_pipe3_remove(struct platform_device *pdev)
602 {
603 pm_runtime_disable(&pdev->dev);
604
605 return 0;
606 }
607
608 static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy)
609 {
610 int ret = 0;
611
612 if (!IS_ERR(phy->refclk)) {
613 ret = clk_prepare_enable(phy->refclk);
614 if (ret) {
615 dev_err(phy->dev, "Failed to enable refclk %d\n", ret);
616 return ret;
617 }
618 }
619
620 if (!IS_ERR(phy->wkupclk)) {
621 ret = clk_prepare_enable(phy->wkupclk);
622 if (ret) {
623 dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
624 goto disable_refclk;
625 }
626 }
627
628 if (!IS_ERR(phy->div_clk)) {
629 ret = clk_prepare_enable(phy->div_clk);
630 if (ret) {
631 dev_err(phy->dev, "Failed to enable div_clk %d\n", ret);
632 goto disable_wkupclk;
633 }
634 }
635
636 return 0;
637
638 disable_wkupclk:
639 if (!IS_ERR(phy->wkupclk))
640 clk_disable_unprepare(phy->wkupclk);
641
642 disable_refclk:
643 if (!IS_ERR(phy->refclk))
644 clk_disable_unprepare(phy->refclk);
645
646 return ret;
647 }
648
649 static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy)
650 {
651 if (!IS_ERR(phy->wkupclk))
652 clk_disable_unprepare(phy->wkupclk);
653 if (!IS_ERR(phy->refclk)) {
654 clk_disable_unprepare(phy->refclk);
655 /*
656 * SATA refclk needs an additional disable as we left it
657 * on in probe to avoid Errata i783
658 */
659 if (phy->sata_refclk_enabled) {
660 clk_disable_unprepare(phy->refclk);
661 phy->sata_refclk_enabled = false;
662 }
663 }
664
665 if (!IS_ERR(phy->div_clk))
666 clk_disable_unprepare(phy->div_clk);
667 }
668
669 static const struct of_device_id ti_pipe3_id_table[] = {
670 {
671 .compatible = "ti,phy-usb3",
672 .data = dpll_map_usb,
673 },
674 {
675 .compatible = "ti,omap-usb3",
676 .data = dpll_map_usb,
677 },
678 {
679 .compatible = "ti,phy-pipe3-sata",
680 .data = dpll_map_sata,
681 },
682 {
683 .compatible = "ti,phy-pipe3-pcie",
684 },
685 {}
686 };
687 MODULE_DEVICE_TABLE(of, ti_pipe3_id_table);
688
689 static struct platform_driver ti_pipe3_driver = {
690 .probe = ti_pipe3_probe,
691 .remove = ti_pipe3_remove,
692 .driver = {
693 .name = "ti-pipe3",
694 .of_match_table = ti_pipe3_id_table,
695 },
696 };
697
698 module_platform_driver(ti_pipe3_driver);
699
700 MODULE_ALIAS("platform:ti_pipe3");
701 MODULE_AUTHOR("Texas Instruments Inc.");
702 MODULE_DESCRIPTION("TI PIPE3 phy driver");
703 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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