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1// SPDX-License-Identifier: GPL-2.0+
2/* PTP 1588 clock using the Renesas Ethernet AVB
3 *
4 * Copyright (C) 2013-2015 Renesas Electronics Corporation
5 * Copyright (C) 2015 Renesas Solutions Corp.
6 * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>
7 */
8
9#include "ravb.h"
10
11static int ravb_ptp_tcr_request(struct ravb_private *priv, u32 request)
12{
13 struct net_device *ndev = priv->ndev;
14 int error;
15
16 error = ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ);
17 if (error)
18 return error;
19
20 ravb_modify(ndev, GCCR, request, request);
21 return ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ);
22}
23
24/* Caller must hold the lock */
25static int ravb_ptp_time_read(struct ravb_private *priv, struct timespec64 *ts)
26{
27 struct net_device *ndev = priv->ndev;
28 int error;
29
30 error = ravb_ptp_tcr_request(priv, GCCR_TCR_CAPTURE);
31 if (error)
32 return error;
33
34 ts->tv_nsec = ravb_read(ndev, GCT0);
35 ts->tv_sec = ravb_read(ndev, GCT1) |
36 ((s64)ravb_read(ndev, GCT2) << 32);
37
38 return 0;
39}
40
41/* Caller must hold the lock */
42static int ravb_ptp_time_write(struct ravb_private *priv,
43 const struct timespec64 *ts)
44{
45 struct net_device *ndev = priv->ndev;
46 int error;
47 u32 gccr;
48
49 error = ravb_ptp_tcr_request(priv, GCCR_TCR_RESET);
50 if (error)
51 return error;
52
53 gccr = ravb_read(ndev, GCCR);
54 if (gccr & GCCR_LTO)
55 return -EBUSY;
56 ravb_write(ndev, ts->tv_nsec, GTO0);
57 ravb_write(ndev, ts->tv_sec, GTO1);
58 ravb_write(ndev, (ts->tv_sec >> 32) & 0xffff, GTO2);
59 ravb_write(ndev, gccr | GCCR_LTO, GCCR);
60
61 return 0;
62}
63
64/* Caller must hold the lock */
65static int ravb_ptp_update_compare(struct ravb_private *priv, u32 ns)
66{
67 struct net_device *ndev = priv->ndev;
68 /* When the comparison value (GPTC.PTCV) is in range of
69 * [x-1 to x+1] (x is the configured increment value in
70 * GTI.TIV), it may happen that a comparison match is
71 * not detected when the timer wraps around.
72 */
73 u32 gti_ns_plus_1 = (priv->ptp.current_addend >> 20) + 1;
74 u32 gccr;
75
76 if (ns < gti_ns_plus_1)
77 ns = gti_ns_plus_1;
78 else if (ns > 0 - gti_ns_plus_1)
79 ns = 0 - gti_ns_plus_1;
80
81 gccr = ravb_read(ndev, GCCR);
82 if (gccr & GCCR_LPTC)
83 return -EBUSY;
84 ravb_write(ndev, ns, GPTC);
85 ravb_write(ndev, gccr | GCCR_LPTC, GCCR);
86
87 return 0;
88}
89
90/* PTP clock operations */
91static int ravb_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
92{
93 struct ravb_private *priv = container_of(ptp, struct ravb_private,
94 ptp.info);
95 struct net_device *ndev = priv->ndev;
96 unsigned long flags;
97 u32 addend;
98 u32 gccr;
99
100 addend = (u32)adjust_by_scaled_ppm(priv->ptp.default_addend,
101 scaled_ppm);
102
103 spin_lock_irqsave(&priv->lock, flags);
104
105 priv->ptp.current_addend = addend;
106
107 gccr = ravb_read(ndev, GCCR);
108 if (gccr & GCCR_LTI) {
109 spin_unlock_irqrestore(&priv->lock, flags);
110 return -EBUSY;
111 }
112 ravb_write(ndev, addend & GTI_TIV, GTI);
113 ravb_write(ndev, gccr | GCCR_LTI, GCCR);
114
115 spin_unlock_irqrestore(&priv->lock, flags);
116
117 return 0;
118}
119
120static int ravb_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
121{
122 struct ravb_private *priv = container_of(ptp, struct ravb_private,
123 ptp.info);
124 struct timespec64 ts;
125 unsigned long flags;
126 int error;
127
128 spin_lock_irqsave(&priv->lock, flags);
129 error = ravb_ptp_time_read(priv, &ts);
130 if (!error) {
131 u64 now = ktime_to_ns(timespec64_to_ktime(ts));
132
133 ts = ns_to_timespec64(now + delta);
134 error = ravb_ptp_time_write(priv, &ts);
135 }
136 spin_unlock_irqrestore(&priv->lock, flags);
137
138 return error;
139}
140
141static int ravb_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts)
142{
143 struct ravb_private *priv = container_of(ptp, struct ravb_private,
144 ptp.info);
145 unsigned long flags;
146 int error;
147
148 spin_lock_irqsave(&priv->lock, flags);
149 error = ravb_ptp_time_read(priv, ts);
150 spin_unlock_irqrestore(&priv->lock, flags);
151
152 return error;
153}
154
155static int ravb_ptp_settime64(struct ptp_clock_info *ptp,
156 const struct timespec64 *ts)
157{
158 struct ravb_private *priv = container_of(ptp, struct ravb_private,
159 ptp.info);
160 unsigned long flags;
161 int error;
162
163 spin_lock_irqsave(&priv->lock, flags);
164 error = ravb_ptp_time_write(priv, ts);
165 spin_unlock_irqrestore(&priv->lock, flags);
166
167 return error;
168}
169
170static int ravb_ptp_extts(struct ptp_clock_info *ptp,
171 struct ptp_extts_request *req, int on)
172{
173 struct ravb_private *priv = container_of(ptp, struct ravb_private,
174 ptp.info);
175 const struct ravb_hw_info *info = priv->info;
176 struct net_device *ndev = priv->ndev;
177 unsigned long flags;
178
179 /* Reject requests with unsupported flags */
180 if (req->flags & ~(PTP_ENABLE_FEATURE |
181 PTP_RISING_EDGE |
182 PTP_FALLING_EDGE |
183 PTP_STRICT_FLAGS))
184 return -EOPNOTSUPP;
185
186 if (req->index)
187 return -EINVAL;
188
189 if (priv->ptp.extts[req->index] == on)
190 return 0;
191 priv->ptp.extts[req->index] = on;
192
193 spin_lock_irqsave(&priv->lock, flags);
194 if (!info->irq_en_dis)
195 ravb_modify(ndev, GIC, GIC_PTCE, on ? GIC_PTCE : 0);
196 else if (on)
197 ravb_write(ndev, GIE_PTCS, GIE);
198 else
199 ravb_write(ndev, GID_PTCD, GID);
200 spin_unlock_irqrestore(&priv->lock, flags);
201
202 return 0;
203}
204
205static int ravb_ptp_perout(struct ptp_clock_info *ptp,
206 struct ptp_perout_request *req, int on)
207{
208 struct ravb_private *priv = container_of(ptp, struct ravb_private,
209 ptp.info);
210 const struct ravb_hw_info *info = priv->info;
211 struct net_device *ndev = priv->ndev;
212 struct ravb_ptp_perout *perout;
213 unsigned long flags;
214 int error = 0;
215
216 /* Reject requests with unsupported flags */
217 if (req->flags)
218 return -EOPNOTSUPP;
219
220 if (req->index)
221 return -EINVAL;
222
223 if (on) {
224 u64 start_ns;
225 u64 period_ns;
226
227 start_ns = req->start.sec * NSEC_PER_SEC + req->start.nsec;
228 period_ns = req->period.sec * NSEC_PER_SEC + req->period.nsec;
229
230 if (start_ns > U32_MAX) {
231 netdev_warn(ndev,
232 "ptp: start value (nsec) is over limit. Maximum size of start is only 32 bits\n");
233 return -ERANGE;
234 }
235
236 if (period_ns > U32_MAX) {
237 netdev_warn(ndev,
238 "ptp: period value (nsec) is over limit. Maximum size of period is only 32 bits\n");
239 return -ERANGE;
240 }
241
242 spin_lock_irqsave(&priv->lock, flags);
243
244 perout = &priv->ptp.perout[req->index];
245 perout->target = (u32)start_ns;
246 perout->period = (u32)period_ns;
247 error = ravb_ptp_update_compare(priv, (u32)start_ns);
248 if (!error) {
249 /* Unmask interrupt */
250 if (!info->irq_en_dis)
251 ravb_modify(ndev, GIC, GIC_PTME, GIC_PTME);
252 else
253 ravb_write(ndev, GIE_PTMS0, GIE);
254 }
255 } else {
256 spin_lock_irqsave(&priv->lock, flags);
257
258 perout = &priv->ptp.perout[req->index];
259 perout->period = 0;
260
261 /* Mask interrupt */
262 if (!info->irq_en_dis)
263 ravb_modify(ndev, GIC, GIC_PTME, 0);
264 else
265 ravb_write(ndev, GID_PTMD0, GID);
266 }
267 spin_unlock_irqrestore(&priv->lock, flags);
268
269 return error;
270}
271
272static int ravb_ptp_enable(struct ptp_clock_info *ptp,
273 struct ptp_clock_request *req, int on)
274{
275 switch (req->type) {
276 case PTP_CLK_REQ_EXTTS:
277 return ravb_ptp_extts(ptp, &req->extts, on);
278 case PTP_CLK_REQ_PEROUT:
279 return ravb_ptp_perout(ptp, &req->perout, on);
280 default:
281 return -EOPNOTSUPP;
282 }
283}
284
285static const struct ptp_clock_info ravb_ptp_info = {
286 .owner = THIS_MODULE,
287 .name = "ravb clock",
288 .max_adj = 50000000,
289 .n_ext_ts = N_EXT_TS,
290 .n_per_out = N_PER_OUT,
291 .adjfine = ravb_ptp_adjfine,
292 .adjtime = ravb_ptp_adjtime,
293 .gettime64 = ravb_ptp_gettime64,
294 .settime64 = ravb_ptp_settime64,
295 .enable = ravb_ptp_enable,
296};
297
298/* Caller must hold the lock */
299void ravb_ptp_interrupt(struct net_device *ndev)
300{
301 struct ravb_private *priv = netdev_priv(ndev);
302 u32 gis = ravb_read(ndev, GIS);
303
304 gis &= ravb_read(ndev, GIC);
305 if (gis & GIS_PTCF) {
306 struct ptp_clock_event event;
307
308 event.type = PTP_CLOCK_EXTTS;
309 event.index = 0;
310 event.timestamp = ravb_read(ndev, GCPT);
311 ptp_clock_event(priv->ptp.clock, &event);
312 }
313 if (gis & GIS_PTMF) {
314 struct ravb_ptp_perout *perout = priv->ptp.perout;
315
316 if (perout->period) {
317 perout->target += perout->period;
318 ravb_ptp_update_compare(priv, perout->target);
319 }
320 }
321
322 ravb_write(ndev, ~(gis | GIS_RESERVED), GIS);
323}
324
325void ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev)
326{
327 struct ravb_private *priv = netdev_priv(ndev);
328 unsigned long flags;
329
330 priv->ptp.info = ravb_ptp_info;
331
332 priv->ptp.default_addend = ravb_read(ndev, GTI);
333 priv->ptp.current_addend = priv->ptp.default_addend;
334
335 spin_lock_irqsave(&priv->lock, flags);
336 ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ);
337 ravb_modify(ndev, GCCR, GCCR_TCSS, GCCR_TCSS_ADJGPTP);
338 spin_unlock_irqrestore(&priv->lock, flags);
339
340 priv->ptp.clock = ptp_clock_register(&priv->ptp.info, &pdev->dev);
341}
342
343void ravb_ptp_stop(struct net_device *ndev)
344{
345 struct ravb_private *priv = netdev_priv(ndev);
346
347 ravb_write(ndev, 0, GIC);
348 ravb_write(ndev, 0, GIS);
349
350 ptp_clock_unregister(priv->ptp.clock);
351}
1/* PTP 1588 clock using the Renesas Ethernet AVB
2 *
3 * Copyright (C) 2013-2015 Renesas Electronics Corporation
4 * Copyright (C) 2015 Renesas Solutions Corp.
5 * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13#include "ravb.h"
14
15static int ravb_ptp_tcr_request(struct ravb_private *priv, u32 request)
16{
17 struct net_device *ndev = priv->ndev;
18 int error;
19
20 error = ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ);
21 if (error)
22 return error;
23
24 ravb_modify(ndev, GCCR, request, request);
25 return ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ);
26}
27
28/* Caller must hold the lock */
29static int ravb_ptp_time_read(struct ravb_private *priv, struct timespec64 *ts)
30{
31 struct net_device *ndev = priv->ndev;
32 int error;
33
34 error = ravb_ptp_tcr_request(priv, GCCR_TCR_CAPTURE);
35 if (error)
36 return error;
37
38 ts->tv_nsec = ravb_read(ndev, GCT0);
39 ts->tv_sec = ravb_read(ndev, GCT1) |
40 ((s64)ravb_read(ndev, GCT2) << 32);
41
42 return 0;
43}
44
45/* Caller must hold the lock */
46static int ravb_ptp_time_write(struct ravb_private *priv,
47 const struct timespec64 *ts)
48{
49 struct net_device *ndev = priv->ndev;
50 int error;
51 u32 gccr;
52
53 error = ravb_ptp_tcr_request(priv, GCCR_TCR_RESET);
54 if (error)
55 return error;
56
57 gccr = ravb_read(ndev, GCCR);
58 if (gccr & GCCR_LTO)
59 return -EBUSY;
60 ravb_write(ndev, ts->tv_nsec, GTO0);
61 ravb_write(ndev, ts->tv_sec, GTO1);
62 ravb_write(ndev, (ts->tv_sec >> 32) & 0xffff, GTO2);
63 ravb_write(ndev, gccr | GCCR_LTO, GCCR);
64
65 return 0;
66}
67
68/* Caller must hold the lock */
69static int ravb_ptp_update_compare(struct ravb_private *priv, u32 ns)
70{
71 struct net_device *ndev = priv->ndev;
72 /* When the comparison value (GPTC.PTCV) is in range of
73 * [x-1 to x+1] (x is the configured increment value in
74 * GTI.TIV), it may happen that a comparison match is
75 * not detected when the timer wraps around.
76 */
77 u32 gti_ns_plus_1 = (priv->ptp.current_addend >> 20) + 1;
78 u32 gccr;
79
80 if (ns < gti_ns_plus_1)
81 ns = gti_ns_plus_1;
82 else if (ns > 0 - gti_ns_plus_1)
83 ns = 0 - gti_ns_plus_1;
84
85 gccr = ravb_read(ndev, GCCR);
86 if (gccr & GCCR_LPTC)
87 return -EBUSY;
88 ravb_write(ndev, ns, GPTC);
89 ravb_write(ndev, gccr | GCCR_LPTC, GCCR);
90
91 return 0;
92}
93
94/* PTP clock operations */
95static int ravb_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
96{
97 struct ravb_private *priv = container_of(ptp, struct ravb_private,
98 ptp.info);
99 struct net_device *ndev = priv->ndev;
100 unsigned long flags;
101 u32 diff, addend;
102 bool neg_adj = false;
103 u32 gccr;
104
105 if (ppb < 0) {
106 neg_adj = true;
107 ppb = -ppb;
108 }
109 addend = priv->ptp.default_addend;
110 diff = div_u64((u64)addend * ppb, NSEC_PER_SEC);
111
112 addend = neg_adj ? addend - diff : addend + diff;
113
114 spin_lock_irqsave(&priv->lock, flags);
115
116 priv->ptp.current_addend = addend;
117
118 gccr = ravb_read(ndev, GCCR);
119 if (gccr & GCCR_LTI) {
120 spin_unlock_irqrestore(&priv->lock, flags);
121 return -EBUSY;
122 }
123 ravb_write(ndev, addend & GTI_TIV, GTI);
124 ravb_write(ndev, gccr | GCCR_LTI, GCCR);
125
126 spin_unlock_irqrestore(&priv->lock, flags);
127
128 return 0;
129}
130
131static int ravb_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
132{
133 struct ravb_private *priv = container_of(ptp, struct ravb_private,
134 ptp.info);
135 struct timespec64 ts;
136 unsigned long flags;
137 int error;
138
139 spin_lock_irqsave(&priv->lock, flags);
140 error = ravb_ptp_time_read(priv, &ts);
141 if (!error) {
142 u64 now = ktime_to_ns(timespec64_to_ktime(ts));
143
144 ts = ns_to_timespec64(now + delta);
145 error = ravb_ptp_time_write(priv, &ts);
146 }
147 spin_unlock_irqrestore(&priv->lock, flags);
148
149 return error;
150}
151
152static int ravb_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts)
153{
154 struct ravb_private *priv = container_of(ptp, struct ravb_private,
155 ptp.info);
156 unsigned long flags;
157 int error;
158
159 spin_lock_irqsave(&priv->lock, flags);
160 error = ravb_ptp_time_read(priv, ts);
161 spin_unlock_irqrestore(&priv->lock, flags);
162
163 return error;
164}
165
166static int ravb_ptp_settime64(struct ptp_clock_info *ptp,
167 const struct timespec64 *ts)
168{
169 struct ravb_private *priv = container_of(ptp, struct ravb_private,
170 ptp.info);
171 unsigned long flags;
172 int error;
173
174 spin_lock_irqsave(&priv->lock, flags);
175 error = ravb_ptp_time_write(priv, ts);
176 spin_unlock_irqrestore(&priv->lock, flags);
177
178 return error;
179}
180
181static int ravb_ptp_extts(struct ptp_clock_info *ptp,
182 struct ptp_extts_request *req, int on)
183{
184 struct ravb_private *priv = container_of(ptp, struct ravb_private,
185 ptp.info);
186 struct net_device *ndev = priv->ndev;
187 unsigned long flags;
188
189 if (req->index)
190 return -EINVAL;
191
192 if (priv->ptp.extts[req->index] == on)
193 return 0;
194 priv->ptp.extts[req->index] = on;
195
196 spin_lock_irqsave(&priv->lock, flags);
197 if (priv->chip_id == RCAR_GEN2)
198 ravb_modify(ndev, GIC, GIC_PTCE, on ? GIC_PTCE : 0);
199 else if (on)
200 ravb_write(ndev, GIE_PTCS, GIE);
201 else
202 ravb_write(ndev, GID_PTCD, GID);
203 mmiowb();
204 spin_unlock_irqrestore(&priv->lock, flags);
205
206 return 0;
207}
208
209static int ravb_ptp_perout(struct ptp_clock_info *ptp,
210 struct ptp_perout_request *req, int on)
211{
212 struct ravb_private *priv = container_of(ptp, struct ravb_private,
213 ptp.info);
214 struct net_device *ndev = priv->ndev;
215 struct ravb_ptp_perout *perout;
216 unsigned long flags;
217 int error = 0;
218
219 if (req->index)
220 return -EINVAL;
221
222 if (on) {
223 u64 start_ns;
224 u64 period_ns;
225
226 start_ns = req->start.sec * NSEC_PER_SEC + req->start.nsec;
227 period_ns = req->period.sec * NSEC_PER_SEC + req->period.nsec;
228
229 if (start_ns > U32_MAX) {
230 netdev_warn(ndev,
231 "ptp: start value (nsec) is over limit. Maximum size of start is only 32 bits\n");
232 return -ERANGE;
233 }
234
235 if (period_ns > U32_MAX) {
236 netdev_warn(ndev,
237 "ptp: period value (nsec) is over limit. Maximum size of period is only 32 bits\n");
238 return -ERANGE;
239 }
240
241 spin_lock_irqsave(&priv->lock, flags);
242
243 perout = &priv->ptp.perout[req->index];
244 perout->target = (u32)start_ns;
245 perout->period = (u32)period_ns;
246 error = ravb_ptp_update_compare(priv, (u32)start_ns);
247 if (!error) {
248 /* Unmask interrupt */
249 if (priv->chip_id == RCAR_GEN2)
250 ravb_modify(ndev, GIC, GIC_PTME, GIC_PTME);
251 else
252 ravb_write(ndev, GIE_PTMS0, GIE);
253 }
254 } else {
255 spin_lock_irqsave(&priv->lock, flags);
256
257 perout = &priv->ptp.perout[req->index];
258 perout->period = 0;
259
260 /* Mask interrupt */
261 if (priv->chip_id == RCAR_GEN2)
262 ravb_modify(ndev, GIC, GIC_PTME, 0);
263 else
264 ravb_write(ndev, GID_PTMD0, GID);
265 }
266 mmiowb();
267 spin_unlock_irqrestore(&priv->lock, flags);
268
269 return error;
270}
271
272static int ravb_ptp_enable(struct ptp_clock_info *ptp,
273 struct ptp_clock_request *req, int on)
274{
275 switch (req->type) {
276 case PTP_CLK_REQ_EXTTS:
277 return ravb_ptp_extts(ptp, &req->extts, on);
278 case PTP_CLK_REQ_PEROUT:
279 return ravb_ptp_perout(ptp, &req->perout, on);
280 default:
281 return -EOPNOTSUPP;
282 }
283}
284
285static const struct ptp_clock_info ravb_ptp_info = {
286 .owner = THIS_MODULE,
287 .name = "ravb clock",
288 .max_adj = 50000000,
289 .n_ext_ts = N_EXT_TS,
290 .n_per_out = N_PER_OUT,
291 .adjfreq = ravb_ptp_adjfreq,
292 .adjtime = ravb_ptp_adjtime,
293 .gettime64 = ravb_ptp_gettime64,
294 .settime64 = ravb_ptp_settime64,
295 .enable = ravb_ptp_enable,
296};
297
298/* Caller must hold the lock */
299void ravb_ptp_interrupt(struct net_device *ndev)
300{
301 struct ravb_private *priv = netdev_priv(ndev);
302 u32 gis = ravb_read(ndev, GIS);
303
304 gis &= ravb_read(ndev, GIC);
305 if (gis & GIS_PTCF) {
306 struct ptp_clock_event event;
307
308 event.type = PTP_CLOCK_EXTTS;
309 event.index = 0;
310 event.timestamp = ravb_read(ndev, GCPT);
311 ptp_clock_event(priv->ptp.clock, &event);
312 }
313 if (gis & GIS_PTMF) {
314 struct ravb_ptp_perout *perout = priv->ptp.perout;
315
316 if (perout->period) {
317 perout->target += perout->period;
318 ravb_ptp_update_compare(priv, perout->target);
319 }
320 }
321
322 ravb_write(ndev, ~gis, GIS);
323}
324
325void ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev)
326{
327 struct ravb_private *priv = netdev_priv(ndev);
328 unsigned long flags;
329
330 priv->ptp.info = ravb_ptp_info;
331
332 priv->ptp.default_addend = ravb_read(ndev, GTI);
333 priv->ptp.current_addend = priv->ptp.default_addend;
334
335 spin_lock_irqsave(&priv->lock, flags);
336 ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ);
337 ravb_modify(ndev, GCCR, GCCR_TCSS, GCCR_TCSS_ADJGPTP);
338 mmiowb();
339 spin_unlock_irqrestore(&priv->lock, flags);
340
341 priv->ptp.clock = ptp_clock_register(&priv->ptp.info, &pdev->dev);
342}
343
344void ravb_ptp_stop(struct net_device *ndev)
345{
346 struct ravb_private *priv = netdev_priv(ndev);
347
348 ravb_write(ndev, 0, GIC);
349 ravb_write(ndev, 0, GIS);
350
351 ptp_clock_unregister(priv->ptp.clock);
352}