1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * PTP 1588 clock for Freescale QorIQ 1588 timer
4 *
5 * Copyright (C) 2010 OMICRON electronics GmbH
6 */
7
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10 #include <linux/device.h>
11 #include <linux/hrtimer.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/of_platform.h>
16 #include <linux/timex.h>
17 #include <linux/slab.h>
18 #include <linux/clk.h>
19
20 #include <linux/fsl/ptp_qoriq.h>
21
22 /*
23 * Register access functions
24 */
25
26 /* Caller must hold ptp_qoriq->lock. */
tmr_cnt_read(struct ptp_qoriq * ptp_qoriq)27 static u64 tmr_cnt_read(struct ptp_qoriq *ptp_qoriq)
28 {
29 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
30 u64 ns;
31 u32 lo, hi;
32
33 lo = ptp_qoriq->read(®s->ctrl_regs->tmr_cnt_l);
34 hi = ptp_qoriq->read(®s->ctrl_regs->tmr_cnt_h);
35 ns = ((u64) hi) << 32;
36 ns |= lo;
37 return ns;
38 }
39
40 /* Caller must hold ptp_qoriq->lock. */
tmr_cnt_write(struct ptp_qoriq * ptp_qoriq,u64 ns)41 static void tmr_cnt_write(struct ptp_qoriq *ptp_qoriq, u64 ns)
42 {
43 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
44 u32 hi = ns >> 32;
45 u32 lo = ns & 0xffffffff;
46
47 ptp_qoriq->write(®s->ctrl_regs->tmr_cnt_l, lo);
48 ptp_qoriq->write(®s->ctrl_regs->tmr_cnt_h, hi);
49 }
50
51 /* Caller must hold ptp_qoriq->lock. */
set_alarm(struct ptp_qoriq * ptp_qoriq)52 static void set_alarm(struct ptp_qoriq *ptp_qoriq)
53 {
54 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
55 u64 ns;
56 u32 lo, hi;
57
58 ns = tmr_cnt_read(ptp_qoriq) + 1500000000ULL;
59 ns = div_u64(ns, 1000000000UL) * 1000000000ULL;
60 ns -= ptp_qoriq->tclk_period;
61 hi = ns >> 32;
62 lo = ns & 0xffffffff;
63 ptp_qoriq->write(®s->alarm_regs->tmr_alarm1_l, lo);
64 ptp_qoriq->write(®s->alarm_regs->tmr_alarm1_h, hi);
65 }
66
67 /* Caller must hold ptp_qoriq->lock. */
set_fipers(struct ptp_qoriq * ptp_qoriq)68 static void set_fipers(struct ptp_qoriq *ptp_qoriq)
69 {
70 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
71
72 set_alarm(ptp_qoriq);
73 ptp_qoriq->write(®s->fiper_regs->tmr_fiper1, ptp_qoriq->tmr_fiper1);
74 ptp_qoriq->write(®s->fiper_regs->tmr_fiper2, ptp_qoriq->tmr_fiper2);
75
76 if (ptp_qoriq->fiper3_support)
77 ptp_qoriq->write(®s->fiper_regs->tmr_fiper3,
78 ptp_qoriq->tmr_fiper3);
79 }
80
extts_clean_up(struct ptp_qoriq * ptp_qoriq,int index,bool update_event)81 int extts_clean_up(struct ptp_qoriq *ptp_qoriq, int index, bool update_event)
82 {
83 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
84 struct ptp_clock_event event;
85 void __iomem *reg_etts_l;
86 void __iomem *reg_etts_h;
87 u32 valid, lo, hi;
88
89 switch (index) {
90 case 0:
91 valid = ETS1_VLD;
92 reg_etts_l = ®s->etts_regs->tmr_etts1_l;
93 reg_etts_h = ®s->etts_regs->tmr_etts1_h;
94 break;
95 case 1:
96 valid = ETS2_VLD;
97 reg_etts_l = ®s->etts_regs->tmr_etts2_l;
98 reg_etts_h = ®s->etts_regs->tmr_etts2_h;
99 break;
100 default:
101 return -EINVAL;
102 }
103
104 event.type = PTP_CLOCK_EXTTS;
105 event.index = index;
106
107 if (ptp_qoriq->extts_fifo_support)
108 if (!(ptp_qoriq->read(®s->ctrl_regs->tmr_stat) & valid))
109 return 0;
110
111 do {
112 lo = ptp_qoriq->read(reg_etts_l);
113 hi = ptp_qoriq->read(reg_etts_h);
114
115 if (update_event) {
116 event.timestamp = ((u64) hi) << 32;
117 event.timestamp |= lo;
118 ptp_clock_event(ptp_qoriq->clock, &event);
119 }
120
121 if (!ptp_qoriq->extts_fifo_support)
122 break;
123 } while (ptp_qoriq->read(®s->ctrl_regs->tmr_stat) & valid);
124
125 return 0;
126 }
127 EXPORT_SYMBOL_GPL(extts_clean_up);
128
129 /*
130 * Interrupt service routine
131 */
132
ptp_qoriq_isr(int irq,void * priv)133 irqreturn_t ptp_qoriq_isr(int irq, void *priv)
134 {
135 struct ptp_qoriq *ptp_qoriq = priv;
136 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
137 struct ptp_clock_event event;
138 u32 ack = 0, mask, val, irqs;
139
140 spin_lock(&ptp_qoriq->lock);
141
142 val = ptp_qoriq->read(®s->ctrl_regs->tmr_tevent);
143 mask = ptp_qoriq->read(®s->ctrl_regs->tmr_temask);
144
145 spin_unlock(&ptp_qoriq->lock);
146
147 irqs = val & mask;
148
149 if (irqs & ETS1) {
150 ack |= ETS1;
151 extts_clean_up(ptp_qoriq, 0, true);
152 }
153
154 if (irqs & ETS2) {
155 ack |= ETS2;
156 extts_clean_up(ptp_qoriq, 1, true);
157 }
158
159 if (irqs & PP1) {
160 ack |= PP1;
161 event.type = PTP_CLOCK_PPS;
162 ptp_clock_event(ptp_qoriq->clock, &event);
163 }
164
165 if (ack) {
166 ptp_qoriq->write(®s->ctrl_regs->tmr_tevent, ack);
167 return IRQ_HANDLED;
168 } else
169 return IRQ_NONE;
170 }
171 EXPORT_SYMBOL_GPL(ptp_qoriq_isr);
172
173 /*
174 * PTP clock operations
175 */
176
ptp_qoriq_adjfine(struct ptp_clock_info * ptp,long scaled_ppm)177 int ptp_qoriq_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
178 {
179 u64 adj, diff;
180 u32 tmr_add;
181 int neg_adj = 0;
182 struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
183 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
184
185 if (scaled_ppm < 0) {
186 neg_adj = 1;
187 scaled_ppm = -scaled_ppm;
188 }
189 tmr_add = ptp_qoriq->tmr_add;
190 adj = tmr_add;
191
192 /*
193 * Calculate diff and round() to the nearest integer
194 *
195 * diff = adj * (ppb / 1000000000)
196 * = adj * scaled_ppm / 65536000000
197 */
198 diff = mul_u64_u64_div_u64(adj, scaled_ppm, 32768000000);
199 diff = DIV64_U64_ROUND_UP(diff, 2);
200
201 tmr_add = neg_adj ? tmr_add - diff : tmr_add + diff;
202 ptp_qoriq->write(®s->ctrl_regs->tmr_add, tmr_add);
203
204 return 0;
205 }
206 EXPORT_SYMBOL_GPL(ptp_qoriq_adjfine);
207
ptp_qoriq_adjtime(struct ptp_clock_info * ptp,s64 delta)208 int ptp_qoriq_adjtime(struct ptp_clock_info *ptp, s64 delta)
209 {
210 s64 now;
211 unsigned long flags;
212 struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
213
214 spin_lock_irqsave(&ptp_qoriq->lock, flags);
215
216 now = tmr_cnt_read(ptp_qoriq);
217 now += delta;
218 tmr_cnt_write(ptp_qoriq, now);
219 set_fipers(ptp_qoriq);
220
221 spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
222
223 return 0;
224 }
225 EXPORT_SYMBOL_GPL(ptp_qoriq_adjtime);
226
ptp_qoriq_gettime(struct ptp_clock_info * ptp,struct timespec64 * ts)227 int ptp_qoriq_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
228 {
229 u64 ns;
230 unsigned long flags;
231 struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
232
233 spin_lock_irqsave(&ptp_qoriq->lock, flags);
234
235 ns = tmr_cnt_read(ptp_qoriq);
236
237 spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
238
239 *ts = ns_to_timespec64(ns);
240
241 return 0;
242 }
243 EXPORT_SYMBOL_GPL(ptp_qoriq_gettime);
244
ptp_qoriq_settime(struct ptp_clock_info * ptp,const struct timespec64 * ts)245 int ptp_qoriq_settime(struct ptp_clock_info *ptp,
246 const struct timespec64 *ts)
247 {
248 u64 ns;
249 unsigned long flags;
250 struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
251
252 ns = timespec64_to_ns(ts);
253
254 spin_lock_irqsave(&ptp_qoriq->lock, flags);
255
256 tmr_cnt_write(ptp_qoriq, ns);
257 set_fipers(ptp_qoriq);
258
259 spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
260
261 return 0;
262 }
263 EXPORT_SYMBOL_GPL(ptp_qoriq_settime);
264
ptp_qoriq_enable(struct ptp_clock_info * ptp,struct ptp_clock_request * rq,int on)265 int ptp_qoriq_enable(struct ptp_clock_info *ptp,
266 struct ptp_clock_request *rq, int on)
267 {
268 struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps);
269 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
270 unsigned long flags;
271 u32 bit, mask = 0;
272
273 switch (rq->type) {
274 case PTP_CLK_REQ_EXTTS:
275 switch (rq->extts.index) {
276 case 0:
277 bit = ETS1EN;
278 break;
279 case 1:
280 bit = ETS2EN;
281 break;
282 default:
283 return -EINVAL;
284 }
285
286 if (on)
287 extts_clean_up(ptp_qoriq, rq->extts.index, false);
288
289 break;
290 case PTP_CLK_REQ_PPS:
291 bit = PP1EN;
292 break;
293 default:
294 return -EOPNOTSUPP;
295 }
296
297 spin_lock_irqsave(&ptp_qoriq->lock, flags);
298
299 mask = ptp_qoriq->read(®s->ctrl_regs->tmr_temask);
300 if (on) {
301 mask |= bit;
302 ptp_qoriq->write(®s->ctrl_regs->tmr_tevent, bit);
303 } else {
304 mask &= ~bit;
305 }
306
307 ptp_qoriq->write(®s->ctrl_regs->tmr_temask, mask);
308
309 spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
310 return 0;
311 }
312 EXPORT_SYMBOL_GPL(ptp_qoriq_enable);
313
314 static const struct ptp_clock_info ptp_qoriq_caps = {
315 .owner = THIS_MODULE,
316 .name = "qoriq ptp clock",
317 .max_adj = 512000,
318 .n_alarm = 0,
319 .n_ext_ts = N_EXT_TS,
320 .n_per_out = 0,
321 .n_pins = 0,
322 .pps = 1,
323 .adjfine = ptp_qoriq_adjfine,
324 .adjtime = ptp_qoriq_adjtime,
325 .gettime64 = ptp_qoriq_gettime,
326 .settime64 = ptp_qoriq_settime,
327 .enable = ptp_qoriq_enable,
328 };
329
330 /**
331 * ptp_qoriq_nominal_freq - calculate nominal frequency according to
332 * reference clock frequency
333 *
334 * @clk_src: reference clock frequency
335 *
336 * The nominal frequency is the desired clock frequency.
337 * It should be less than the reference clock frequency.
338 * It should be a factor of 1000MHz.
339 *
340 * Return the nominal frequency
341 */
ptp_qoriq_nominal_freq(u32 clk_src)342 static u32 ptp_qoriq_nominal_freq(u32 clk_src)
343 {
344 u32 remainder = 0;
345
346 clk_src /= 1000000;
347 remainder = clk_src % 100;
348 if (remainder) {
349 clk_src -= remainder;
350 clk_src += 100;
351 }
352
353 do {
354 clk_src -= 100;
355
356 } while (1000 % clk_src);
357
358 return clk_src * 1000000;
359 }
360
361 /**
362 * ptp_qoriq_auto_config - calculate a set of default configurations
363 *
364 * @ptp_qoriq: pointer to ptp_qoriq
365 * @node: pointer to device_node
366 *
367 * If below dts properties are not provided, this function will be
368 * called to calculate a set of default configurations for them.
369 * "fsl,tclk-period"
370 * "fsl,tmr-prsc"
371 * "fsl,tmr-add"
372 * "fsl,tmr-fiper1"
373 * "fsl,tmr-fiper2"
374 * "fsl,tmr-fiper3" (required only for DPAA2 and ENETC hardware)
375 * "fsl,max-adj"
376 *
377 * Return 0 if success
378 */
ptp_qoriq_auto_config(struct ptp_qoriq * ptp_qoriq,struct device_node * node)379 static int ptp_qoriq_auto_config(struct ptp_qoriq *ptp_qoriq,
380 struct device_node *node)
381 {
382 struct clk *clk;
383 u64 freq_comp;
384 u64 max_adj;
385 u32 nominal_freq;
386 u32 remainder = 0;
387 u32 clk_src = 0;
388
389 ptp_qoriq->cksel = DEFAULT_CKSEL;
390
391 clk = of_clk_get(node, 0);
392 if (!IS_ERR(clk)) {
393 clk_src = clk_get_rate(clk);
394 clk_put(clk);
395 }
396
397 if (clk_src <= 100000000UL) {
398 pr_err("error reference clock value, or lower than 100MHz\n");
399 return -EINVAL;
400 }
401
402 nominal_freq = ptp_qoriq_nominal_freq(clk_src);
403 if (!nominal_freq)
404 return -EINVAL;
405
406 ptp_qoriq->tclk_period = 1000000000UL / nominal_freq;
407 ptp_qoriq->tmr_prsc = DEFAULT_TMR_PRSC;
408
409 /* Calculate initial frequency compensation value for TMR_ADD register.
410 * freq_comp = ceil(2^32 / freq_ratio)
411 * freq_ratio = reference_clock_freq / nominal_freq
412 */
413 freq_comp = ((u64)1 << 32) * nominal_freq;
414 freq_comp = div_u64_rem(freq_comp, clk_src, &remainder);
415 if (remainder)
416 freq_comp++;
417
418 ptp_qoriq->tmr_add = freq_comp;
419 ptp_qoriq->tmr_fiper1 = DEFAULT_FIPER1_PERIOD - ptp_qoriq->tclk_period;
420 ptp_qoriq->tmr_fiper2 = DEFAULT_FIPER2_PERIOD - ptp_qoriq->tclk_period;
421 ptp_qoriq->tmr_fiper3 = DEFAULT_FIPER3_PERIOD - ptp_qoriq->tclk_period;
422
423 /* max_adj = 1000000000 * (freq_ratio - 1.0) - 1
424 * freq_ratio = reference_clock_freq / nominal_freq
425 */
426 max_adj = 1000000000ULL * (clk_src - nominal_freq);
427 max_adj = div_u64(max_adj, nominal_freq) - 1;
428 ptp_qoriq->caps.max_adj = max_adj;
429
430 return 0;
431 }
432
ptp_qoriq_init(struct ptp_qoriq * ptp_qoriq,void __iomem * base,const struct ptp_clock_info * caps)433 int ptp_qoriq_init(struct ptp_qoriq *ptp_qoriq, void __iomem *base,
434 const struct ptp_clock_info *caps)
435 {
436 struct device_node *node = ptp_qoriq->dev->of_node;
437 struct ptp_qoriq_registers *regs;
438 struct timespec64 now;
439 unsigned long flags;
440 u32 tmr_ctrl;
441
442 if (!node)
443 return -ENODEV;
444
445 ptp_qoriq->base = base;
446 ptp_qoriq->caps = *caps;
447
448 if (of_property_read_u32(node, "fsl,cksel", &ptp_qoriq->cksel))
449 ptp_qoriq->cksel = DEFAULT_CKSEL;
450
451 if (of_property_read_bool(node, "fsl,extts-fifo"))
452 ptp_qoriq->extts_fifo_support = true;
453 else
454 ptp_qoriq->extts_fifo_support = false;
455
456 if (of_device_is_compatible(node, "fsl,dpaa2-ptp") ||
457 of_device_is_compatible(node, "fsl,enetc-ptp"))
458 ptp_qoriq->fiper3_support = true;
459
460 if (of_property_read_u32(node,
461 "fsl,tclk-period", &ptp_qoriq->tclk_period) ||
462 of_property_read_u32(node,
463 "fsl,tmr-prsc", &ptp_qoriq->tmr_prsc) ||
464 of_property_read_u32(node,
465 "fsl,tmr-add", &ptp_qoriq->tmr_add) ||
466 of_property_read_u32(node,
467 "fsl,tmr-fiper1", &ptp_qoriq->tmr_fiper1) ||
468 of_property_read_u32(node,
469 "fsl,tmr-fiper2", &ptp_qoriq->tmr_fiper2) ||
470 of_property_read_u32(node,
471 "fsl,max-adj", &ptp_qoriq->caps.max_adj) ||
472 (ptp_qoriq->fiper3_support &&
473 of_property_read_u32(node, "fsl,tmr-fiper3",
474 &ptp_qoriq->tmr_fiper3))) {
475 pr_warn("device tree node missing required elements, try automatic configuration\n");
476
477 if (ptp_qoriq_auto_config(ptp_qoriq, node))
478 return -ENODEV;
479 }
480
481 if (of_property_read_bool(node, "little-endian")) {
482 ptp_qoriq->read = qoriq_read_le;
483 ptp_qoriq->write = qoriq_write_le;
484 } else {
485 ptp_qoriq->read = qoriq_read_be;
486 ptp_qoriq->write = qoriq_write_be;
487 }
488
489 /* The eTSEC uses differnt memory map with DPAA/ENETC */
490 if (of_device_is_compatible(node, "fsl,etsec-ptp")) {
491 ptp_qoriq->regs.ctrl_regs = base + ETSEC_CTRL_REGS_OFFSET;
492 ptp_qoriq->regs.alarm_regs = base + ETSEC_ALARM_REGS_OFFSET;
493 ptp_qoriq->regs.fiper_regs = base + ETSEC_FIPER_REGS_OFFSET;
494 ptp_qoriq->regs.etts_regs = base + ETSEC_ETTS_REGS_OFFSET;
495 } else {
496 ptp_qoriq->regs.ctrl_regs = base + CTRL_REGS_OFFSET;
497 ptp_qoriq->regs.alarm_regs = base + ALARM_REGS_OFFSET;
498 ptp_qoriq->regs.fiper_regs = base + FIPER_REGS_OFFSET;
499 ptp_qoriq->regs.etts_regs = base + ETTS_REGS_OFFSET;
500 }
501
502 spin_lock_init(&ptp_qoriq->lock);
503
504 ktime_get_real_ts64(&now);
505 ptp_qoriq_settime(&ptp_qoriq->caps, &now);
506
507 tmr_ctrl =
508 (ptp_qoriq->tclk_period & TCLK_PERIOD_MASK) << TCLK_PERIOD_SHIFT |
509 (ptp_qoriq->cksel & CKSEL_MASK) << CKSEL_SHIFT;
510
511 spin_lock_irqsave(&ptp_qoriq->lock, flags);
512
513 regs = &ptp_qoriq->regs;
514 ptp_qoriq->write(®s->ctrl_regs->tmr_ctrl, tmr_ctrl);
515 ptp_qoriq->write(®s->ctrl_regs->tmr_add, ptp_qoriq->tmr_add);
516 ptp_qoriq->write(®s->ctrl_regs->tmr_prsc, ptp_qoriq->tmr_prsc);
517 ptp_qoriq->write(®s->fiper_regs->tmr_fiper1, ptp_qoriq->tmr_fiper1);
518 ptp_qoriq->write(®s->fiper_regs->tmr_fiper2, ptp_qoriq->tmr_fiper2);
519
520 if (ptp_qoriq->fiper3_support)
521 ptp_qoriq->write(®s->fiper_regs->tmr_fiper3,
522 ptp_qoriq->tmr_fiper3);
523
524 set_alarm(ptp_qoriq);
525 ptp_qoriq->write(®s->ctrl_regs->tmr_ctrl,
526 tmr_ctrl|FIPERST|RTPE|TE|FRD);
527
528 spin_unlock_irqrestore(&ptp_qoriq->lock, flags);
529
530 ptp_qoriq->clock = ptp_clock_register(&ptp_qoriq->caps, ptp_qoriq->dev);
531 if (IS_ERR(ptp_qoriq->clock))
532 return PTR_ERR(ptp_qoriq->clock);
533
534 ptp_qoriq->phc_index = ptp_clock_index(ptp_qoriq->clock);
535 ptp_qoriq_create_debugfs(ptp_qoriq);
536 return 0;
537 }
538 EXPORT_SYMBOL_GPL(ptp_qoriq_init);
539
ptp_qoriq_free(struct ptp_qoriq * ptp_qoriq)540 void ptp_qoriq_free(struct ptp_qoriq *ptp_qoriq)
541 {
542 struct ptp_qoriq_registers *regs = &ptp_qoriq->regs;
543
544 ptp_qoriq->write(®s->ctrl_regs->tmr_temask, 0);
545 ptp_qoriq->write(®s->ctrl_regs->tmr_ctrl, 0);
546
547 ptp_qoriq_remove_debugfs(ptp_qoriq);
548 ptp_clock_unregister(ptp_qoriq->clock);
549 iounmap(ptp_qoriq->base);
550 free_irq(ptp_qoriq->irq, ptp_qoriq);
551 }
552 EXPORT_SYMBOL_GPL(ptp_qoriq_free);
553
ptp_qoriq_probe(struct platform_device * dev)554 static int ptp_qoriq_probe(struct platform_device *dev)
555 {
556 struct ptp_qoriq *ptp_qoriq;
557 int err = -ENOMEM;
558 void __iomem *base;
559
560 ptp_qoriq = kzalloc(sizeof(*ptp_qoriq), GFP_KERNEL);
561 if (!ptp_qoriq)
562 goto no_memory;
563
564 ptp_qoriq->dev = &dev->dev;
565
566 err = -ENODEV;
567
568 ptp_qoriq->irq = platform_get_irq(dev, 0);
569 if (ptp_qoriq->irq < 0) {
570 pr_err("irq not in device tree\n");
571 goto no_node;
572 }
573 if (request_irq(ptp_qoriq->irq, ptp_qoriq_isr, IRQF_SHARED,
574 DRIVER, ptp_qoriq)) {
575 pr_err("request_irq failed\n");
576 goto no_node;
577 }
578
579 ptp_qoriq->rsrc = platform_get_resource(dev, IORESOURCE_MEM, 0);
580 if (!ptp_qoriq->rsrc) {
581 pr_err("no resource\n");
582 goto no_resource;
583 }
584 if (request_resource(&iomem_resource, ptp_qoriq->rsrc)) {
585 pr_err("resource busy\n");
586 goto no_resource;
587 }
588
589 base = ioremap(ptp_qoriq->rsrc->start,
590 resource_size(ptp_qoriq->rsrc));
591 if (!base) {
592 pr_err("ioremap ptp registers failed\n");
593 goto no_ioremap;
594 }
595
596 err = ptp_qoriq_init(ptp_qoriq, base, &ptp_qoriq_caps);
597 if (err)
598 goto no_clock;
599
600 platform_set_drvdata(dev, ptp_qoriq);
601 return 0;
602
603 no_clock:
604 iounmap(ptp_qoriq->base);
605 no_ioremap:
606 release_resource(ptp_qoriq->rsrc);
607 no_resource:
608 free_irq(ptp_qoriq->irq, ptp_qoriq);
609 no_node:
610 kfree(ptp_qoriq);
611 no_memory:
612 return err;
613 }
614
ptp_qoriq_remove(struct platform_device * dev)615 static int ptp_qoriq_remove(struct platform_device *dev)
616 {
617 struct ptp_qoriq *ptp_qoriq = platform_get_drvdata(dev);
618
619 ptp_qoriq_free(ptp_qoriq);
620 release_resource(ptp_qoriq->rsrc);
621 kfree(ptp_qoriq);
622 return 0;
623 }
624
625 static const struct of_device_id match_table[] = {
626 { .compatible = "fsl,etsec-ptp" },
627 { .compatible = "fsl,fman-ptp-timer" },
628 {},
629 };
630 MODULE_DEVICE_TABLE(of, match_table);
631
632 static struct platform_driver ptp_qoriq_driver = {
633 .driver = {
634 .name = "ptp_qoriq",
635 .of_match_table = match_table,
636 },
637 .probe = ptp_qoriq_probe,
638 .remove = ptp_qoriq_remove,
639 };
640
641 module_platform_driver(ptp_qoriq_driver);
642
643 MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
644 MODULE_DESCRIPTION("PTP clock for Freescale QorIQ 1588 timer");
645 MODULE_LICENSE("GPL");
646