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1 From 0d6e214f5a257f9b53619ef8aa3b6e767189bdcf Mon Sep 17 00:00:00 2001
2 From: Fugang Duan <fugang.duan@nxp.com>
3 Date: Wed, 11 Sep 2019 16:21:06 +0800
4 Subject: [PATCH] tty: serial: fsl_lpuart: enable dma mode for imx8qxp
5
6 imx8qxp lpuart support eDMA for dma mode, support EOP (end-of-packet)
7 feature. But eDMA cannot detect the correct DADDR for current major
8 loop in cyclic mode, so it doesn't support cyclic mode.
9
10 The patch is to enable lpuart prep slave sg dma mode for imx8qxp.
11
12 Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
13 ---
14 drivers/tty/serial/fsl_lpuart.c | 280 +++++++++++++++++++++++++++++++---------
15 1 file changed, 219 insertions(+), 61 deletions(-)
16
17 --- a/drivers/tty/serial/fsl_lpuart.c
18 +++ b/drivers/tty/serial/fsl_lpuart.c
19 @@ -131,6 +131,7 @@
20 #define UARTBAUD_M10 0x20000000
21 #define UARTBAUD_TDMAE 0x00800000
22 #define UARTBAUD_RDMAE 0x00200000
23 +#define UARTBAUD_RIDMAE 0x00100000
24 #define UARTBAUD_MATCFG 0x00400000
25 #define UARTBAUD_BOTHEDGE 0x00020000
26 #define UARTBAUD_RESYNCDIS 0x00010000
27 @@ -179,7 +180,7 @@
28 #define UARTCTRL_SBK 0x00010000
29 #define UARTCTRL_MA1IE 0x00008000
30 #define UARTCTRL_MA2IE 0x00004000
31 -#define UARTCTRL_IDLECFG 0x00000100
32 +#define UARTCTRL_IDLECFG_OFF 0x8
33 #define UARTCTRL_LOOPS 0x00000080
34 #define UARTCTRL_DOZEEN 0x00000040
35 #define UARTCTRL_RSRC 0x00000020
36 @@ -197,6 +198,7 @@
37 #define UARTDATA_MASK 0x3ff
38
39 #define UARTMODIR_IREN 0x00020000
40 +#define UARTMODIR_RTSWATER_S 0x8
41 #define UARTMODIR_TXCTSSRC 0x00000020
42 #define UARTMODIR_TXCTSC 0x00000010
43 #define UARTMODIR_RXRTSE 0x00000008
44 @@ -210,6 +212,8 @@
45 #define UARTFIFO_RXUF 0x00010000
46 #define UARTFIFO_TXFLUSH 0x00008000
47 #define UARTFIFO_RXFLUSH 0x00004000
48 +#define UARTFIFO_RXIDEN_MASK 0x7
49 +#define UARTFIFO_RXIDEN_OFF 10
50 #define UARTFIFO_TXOFE 0x00000200
51 #define UARTFIFO_RXUFE 0x00000100
52 #define UARTFIFO_TXFE 0x00000080
53 @@ -226,6 +230,9 @@
54 #define UARTWATER_TXWATER_OFF 0
55 #define UARTWATER_RXWATER_OFF 16
56
57 +#define UARTFIFO_RXIDEN_RDRF 0x3
58 +#define UARTCTRL_IDLECFG 0x7
59 +
60 /* Rx DMA timeout in ms, which is used to calculate Rx ring buffer size */
61 #define DMA_RX_TIMEOUT (10)
62
63 @@ -253,6 +260,9 @@ struct lpuart_port {
64 unsigned int txfifo_size;
65 unsigned int rxfifo_size;
66
67 + u8 rx_watermark;
68 + bool dma_eeop;
69 + bool rx_dma_cyclic;
70 bool lpuart_dma_tx_use;
71 bool lpuart_dma_rx_use;
72 struct dma_chan *dma_tx_chan;
73 @@ -278,28 +288,38 @@ struct lpuart_soc_data {
74 enum lpuart_type devtype;
75 char iotype;
76 u8 reg_off;
77 + u8 rx_watermark;
78 + bool rx_dma_cyclic;
79 };
80
81 static const struct lpuart_soc_data vf_data = {
82 .devtype = VF610_LPUART,
83 .iotype = UPIO_MEM,
84 + .rx_watermark = 1,
85 + .rx_dma_cyclic = true,
86 };
87
88 static const struct lpuart_soc_data ls_data = {
89 .devtype = LS1021A_LPUART,
90 .iotype = UPIO_MEM32BE,
91 + .rx_watermark = 0,
92 + .rx_dma_cyclic = true,
93 };
94
95 static struct lpuart_soc_data imx7ulp_data = {
96 .devtype = IMX7ULP_LPUART,
97 .iotype = UPIO_MEM32,
98 .reg_off = IMX_REG_OFF,
99 + .rx_watermark = 0,
100 + .rx_dma_cyclic = true,
101 };
102
103 static struct lpuart_soc_data imx8qxp_data = {
104 .devtype = IMX8QXP_LPUART,
105 .iotype = UPIO_MEM32,
106 .reg_off = IMX_REG_OFF,
107 + .rx_watermark = 31,
108 + .rx_dma_cyclic = false,
109 };
110
111 static const struct of_device_id lpuart_dt_ids[] = {
112 @@ -313,6 +333,7 @@ MODULE_DEVICE_TABLE(of, lpuart_dt_ids);
113
114 /* Forward declare this for the dma callbacks*/
115 static void lpuart_dma_tx_complete(void *arg);
116 +static int lpuart_sched_rx_dma(struct lpuart_port *sport);
117
118 static inline bool is_imx8qxp_lpuart(struct lpuart_port *sport)
119 {
120 @@ -998,19 +1019,15 @@ static irqreturn_t lpuart32_int(int irq,
121 if ((sts & UARTSTAT_TDRE) && !sport->lpuart_dma_tx_use)
122 lpuart32_txint(sport);
123
124 + if (sport->lpuart_dma_rx_use && sport->dma_eeop)
125 + sts &= ~UARTSTAT_IDLE;
126 +
127 lpuart32_write(&sport->port, sts, UARTSTAT);
128 return IRQ_HANDLED;
129 }
130
131 -static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
132 +static void lpuart_rx_error_stat(struct lpuart_port *sport)
133 {
134 - struct tty_port *port = &sport->port.state->port;
135 - struct dma_tx_state state;
136 - enum dma_status dmastat;
137 - struct circ_buf *ring = &sport->rx_ring;
138 - unsigned long flags;
139 - int count = 0;
140 -
141 if (lpuart_is_32(sport)) {
142 unsigned long sr = lpuart32_read(&sport->port, UARTSTAT);
143
144 @@ -1062,8 +1079,21 @@ static void lpuart_copy_rx_to_tty(struct
145 writeb(cr2, sport->port.membase + UARTCR2);
146 }
147 }
148 +}
149 +
150 +static void lpuart_copy_rx_to_tty(struct lpuart_port *sport)
151 +{
152 + struct tty_port *port = &sport->port.state->port;
153 + struct dma_tx_state state;
154 + enum dma_status dmastat;
155 + struct circ_buf *ring = &sport->rx_ring;
156 + unsigned long flags;
157 + int count = 0;
158
159 - async_tx_ack(sport->dma_rx_desc);
160 + if (!is_imx8qxp_lpuart(sport)) {
161 + lpuart_rx_error_stat(sport);
162 + async_tx_ack(sport->dma_rx_desc);
163 + }
164
165 spin_lock_irqsave(&sport->port.lock, flags);
166
167 @@ -1126,7 +1156,33 @@ static void lpuart_copy_rx_to_tty(struct
168 spin_unlock_irqrestore(&sport->port.lock, flags);
169
170 tty_flip_buffer_push(port);
171 - mod_timer(&sport->lpuart_timer, jiffies + sport->dma_rx_timeout);
172 +
173 + if (!sport->dma_eeop)
174 + mod_timer(&sport->lpuart_timer,
175 + jiffies + sport->dma_rx_timeout);
176 +}
177 +
178 +static void lpuart_dma_rx_post_handler(struct lpuart_port *sport)
179 +{
180 + unsigned long flags;
181 + unsigned long rxcount;
182 +
183 + spin_lock_irqsave(&sport->port.lock, flags);
184 +
185 + /* For end of packet, clear the idle flag to avoid to trigger
186 + * the next transfer. Only i.MX8x lpuart support EEOP.
187 + */
188 + if (sport->dma_eeop && lpuart_is_32(sport)) {
189 + rxcount = lpuart32_read(&sport->port, UARTWATER);
190 + rxcount = rxcount >> UARTWATER_RXCNT_OFF;
191 + if (!rxcount)
192 + lpuart32_write(&sport->port, UARTSTAT_IDLE, UARTSTAT);
193 + }
194 +
195 + lpuart_sched_rx_dma(sport);
196 +
197 + spin_unlock_irqrestore(&sport->port.lock, flags);
198 +
199 }
200
201 static void lpuart_dma_rx_complete(void *arg)
202 @@ -1134,6 +1190,8 @@ static void lpuart_dma_rx_complete(void
203 struct lpuart_port *sport = arg;
204
205 lpuart_copy_rx_to_tty(sport);
206 + if (!sport->rx_dma_cyclic)
207 + lpuart_dma_rx_post_handler(sport);
208 }
209
210 static void lpuart_timer_func(struct timer_list *t)
211 @@ -1141,13 +1199,78 @@ static void lpuart_timer_func(struct tim
212 struct lpuart_port *sport = from_timer(sport, t, lpuart_timer);
213
214 lpuart_copy_rx_to_tty(sport);
215 + if (!sport->rx_dma_cyclic) {
216 + dmaengine_terminate_async(sport->dma_rx_chan);
217 + lpuart_dma_rx_post_handler(sport);
218 + }
219 }
220
221 -static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
222 +static int lpuart_sched_rxdma_cyclic(struct lpuart_port *sport)
223 +{
224 + sport->dma_rx_desc = dmaengine_prep_dma_cyclic(sport->dma_rx_chan,
225 + sg_dma_address(&sport->rx_sgl),
226 + sport->rx_sgl.length,
227 + sport->rx_sgl.length / 2,
228 + DMA_DEV_TO_MEM,
229 + DMA_PREP_INTERRUPT);
230 + if (!sport->dma_rx_desc) {
231 + dev_err(sport->port.dev, "Cannot prepare cyclic DMA\n");
232 + return -EFAULT;
233 + }
234 +
235 + return 0;
236 +}
237 +
238 +static int lpuart_sched_rxdma_slave_sg(struct lpuart_port *sport)
239 +{
240 + dma_sync_sg_for_device(sport->port.dev, &sport->rx_sgl, 1,
241 + DMA_FROM_DEVICE);
242 + sport->dma_rx_desc = dmaengine_prep_slave_sg(sport->dma_rx_chan,
243 + &sport->rx_sgl,
244 + 1,
245 + DMA_DEV_TO_MEM,
246 + DMA_PREP_INTERRUPT);
247 + if (!sport->dma_rx_desc) {
248 + dev_err(sport->port.dev, "Cannot prepare slave_sg DMA\n");
249 + return -EFAULT;
250 + }
251 + sport->rx_ring.tail = 0;
252 + sport->rx_ring.head = 0;
253 +
254 + return 0;
255 +}
256 +
257 +static int lpuart_sched_rx_dma(struct lpuart_port *sport)
258 +{
259 + unsigned long temp;
260 + int ret;
261 +
262 + if (sport->rx_dma_cyclic)
263 + ret = lpuart_sched_rxdma_cyclic(sport);
264 + else
265 + ret = lpuart_sched_rxdma_slave_sg(sport);
266 +
267 + sport->dma_rx_desc->callback = lpuart_dma_rx_complete;
268 + sport->dma_rx_desc->callback_param = sport;
269 + sport->dma_rx_cookie = dmaengine_submit(sport->dma_rx_desc);
270 + dma_async_issue_pending(sport->dma_rx_chan);
271 +
272 + if (lpuart_is_32(sport)) {
273 + temp = lpuart32_read(&sport->port, UARTBAUD);
274 + if (sport->dma_eeop)
275 + temp |= UARTBAUD_RIDMAE;
276 + temp |= UARTBAUD_RDMAE;
277 + lpuart32_write(&sport->port, temp, UARTBAUD);
278 + } else {
279 + writeb(readb(sport->port.membase + UARTCR5) | UARTCR5_RDMAS,
280 + sport->port.membase + UARTCR5);
281 + }
282 +
283 + return ret;
284 +}
285 +
286 +static void lpuart_get_rx_dma_rng_len(struct lpuart_port *sport)
287 {
288 - struct dma_slave_config dma_rx_sconfig = {};
289 - struct circ_buf *ring = &sport->rx_ring;
290 - int ret, nent;
291 int bits, baud;
292 struct tty_port *port = &sport->port.state->port;
293 struct tty_struct *tty = port->tty;
294 @@ -1167,6 +1290,18 @@ static inline int lpuart_start_rx_dma(st
295 sport->rx_dma_rng_buf_len = (1 << (fls(sport->rx_dma_rng_buf_len) - 1));
296 if (sport->rx_dma_rng_buf_len < 16)
297 sport->rx_dma_rng_buf_len = 16;
298 +}
299 +
300 +static inline int lpuart_start_rx_dma(struct lpuart_port *sport)
301 +{
302 + struct dma_slave_config dma_rx_sconfig = {};
303 + struct circ_buf *ring = &sport->rx_ring;
304 + int ret, nent;
305 +
306 + if (!sport->dma_eeop)
307 + lpuart_get_rx_dma_rng_len(sport);
308 + else
309 + sport->rx_dma_rng_buf_len = PAGE_SIZE;
310
311 ring->buf = kzalloc(sport->rx_dma_rng_buf_len, GFP_ATOMIC);
312 if (!ring->buf)
313 @@ -1192,32 +1327,7 @@ static inline int lpuart_start_rx_dma(st
314 return ret;
315 }
316
317 - sport->dma_rx_desc = dmaengine_prep_dma_cyclic(sport->dma_rx_chan,
318 - sg_dma_address(&sport->rx_sgl),
319 - sport->rx_sgl.length,
320 - sport->rx_sgl.length / 2,
321 - DMA_DEV_TO_MEM,
322 - DMA_PREP_INTERRUPT);
323 - if (!sport->dma_rx_desc) {
324 - dev_err(sport->port.dev, "Cannot prepare cyclic DMA\n");
325 - return -EFAULT;
326 - }
327 -
328 - sport->dma_rx_desc->callback = lpuart_dma_rx_complete;
329 - sport->dma_rx_desc->callback_param = sport;
330 - sport->dma_rx_cookie = dmaengine_submit(sport->dma_rx_desc);
331 - dma_async_issue_pending(sport->dma_rx_chan);
332 -
333 - if (lpuart_is_32(sport)) {
334 - unsigned long temp = lpuart32_read(&sport->port, UARTBAUD);
335 -
336 - lpuart32_write(&sport->port, temp | UARTBAUD_RDMAE, UARTBAUD);
337 - } else {
338 - writeb(readb(sport->port.membase + UARTCR5) | UARTCR5_RDMAS,
339 - sport->port.membase + UARTCR5);
340 - }
341 -
342 - return 0;
343 + return lpuart_sched_rx_dma(sport);
344 }
345
346 static void lpuart_dma_rx_free(struct uart_port *port)
347 @@ -1403,8 +1513,10 @@ static void lpuart_setup_watermark(struc
348 writeb(UARTSFIFO_RXUF, sport->port.membase + UARTSFIFO);
349 }
350
351 + if (uart_console(&sport->port))
352 + sport->rx_watermark = 1;
353 writeb(0, sport->port.membase + UARTTWFIFO);
354 - writeb(1, sport->port.membase + UARTRWFIFO);
355 + writeb(sport->rx_watermark, sport->port.membase + UARTRWFIFO);
356
357 /* Restore cr2 */
358 writeb(cr2_saved, sport->port.membase + UARTCR2);
359 @@ -1425,6 +1537,7 @@ static void lpuart32_setup_watermark(str
360 {
361 unsigned long val, ctrl;
362 unsigned long ctrl_saved;
363 + unsigned long rxiden_cnt;
364
365 ctrl = lpuart32_read(&sport->port, UARTCTRL);
366 ctrl_saved = ctrl;
367 @@ -1436,12 +1549,26 @@ static void lpuart32_setup_watermark(str
368 val = lpuart32_read(&sport->port, UARTFIFO);
369 val |= UARTFIFO_TXFE | UARTFIFO_RXFE;
370 val |= UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH;
371 + val &= ~(UARTFIFO_RXIDEN_MASK << UARTFIFO_RXIDEN_OFF);
372 + rxiden_cnt = sport->dma_eeop ? 0 : UARTFIFO_RXIDEN_RDRF;
373 + val |= ((rxiden_cnt & UARTFIFO_RXIDEN_MASK) <<
374 + UARTFIFO_RXIDEN_OFF);
375 lpuart32_write(&sport->port, val, UARTFIFO);
376
377 /* set the watermark */
378 - val = (0x1 << UARTWATER_RXWATER_OFF) | (0x0 << UARTWATER_TXWATER_OFF);
379 + if (uart_console(&sport->port))
380 + sport->rx_watermark = 1;
381 + val = (sport->rx_watermark << UARTWATER_RXWATER_OFF) |
382 + (0x0 << UARTWATER_TXWATER_OFF);
383 lpuart32_write(&sport->port, val, UARTWATER);
384
385 + /* set RTS watermark */
386 + if (!uart_console(&sport->port)) {
387 + val = lpuart32_read(&sport->port, UARTMODIR);
388 + val = (sport->rxfifo_size >> 1) << UARTMODIR_RTSWATER_S;
389 + lpuart32_write(&sport->port, val, UARTMODIR);
390 + }
391 +
392 /* Restore cr2 */
393 lpuart32_write(&sport->port, ctrl_saved, UARTCTRL);
394 }
395 @@ -1453,17 +1580,29 @@ static void lpuart32_setup_watermark_ena
396 lpuart32_setup_watermark(sport);
397
398 temp = lpuart32_read(&sport->port, UARTCTRL);
399 - temp |= UARTCTRL_RE | UARTCTRL_TE | UARTCTRL_ILIE;
400 + temp |= UARTCTRL_RE | UARTCTRL_TE;
401 + temp |= UARTCTRL_IDLECFG << UARTCTRL_IDLECFG_OFF;
402 lpuart32_write(&sport->port, temp, UARTCTRL);
403 }
404
405 static void rx_dma_timer_init(struct lpuart_port *sport)
406 {
407 + if (sport->dma_eeop)
408 + return;
409 +
410 timer_setup(&sport->lpuart_timer, lpuart_timer_func, 0);
411 sport->lpuart_timer.expires = jiffies + sport->dma_rx_timeout;
412 add_timer(&sport->lpuart_timer);
413 }
414
415 +static void lpuart_del_timer_sync(struct lpuart_port *sport)
416 +{
417 + if (sport->dma_eeop)
418 + return;
419 +
420 + del_timer_sync(&sport->lpuart_timer);
421 +}
422 +
423 static void lpuart_tx_dma_startup(struct lpuart_port *sport)
424 {
425 u32 uartbaud;
426 @@ -1527,19 +1666,23 @@ static int lpuart_startup(struct uart_po
427 return 0;
428 }
429
430 +static void lpuart32_hw_disable(struct lpuart_port *sport)
431 +{
432 + unsigned long temp;
433 +
434 + temp = lpuart32_read(&sport->port, UARTCTRL);
435 + temp &= ~(UARTCTRL_RIE | UARTCTRL_ILIE | UARTCTRL_RE |
436 + UARTCTRL_TIE | UARTCTRL_TE);
437 + lpuart32_write(&sport->port, temp, UARTCTRL);
438 +}
439 +
440 static void lpuart32_configure(struct lpuart_port *sport)
441 {
442 unsigned long temp;
443
444 - if (sport->lpuart_dma_rx_use) {
445 - /* RXWATER must be 0 */
446 - temp = lpuart32_read(&sport->port, UARTWATER);
447 - temp &= ~(UARTWATER_WATER_MASK << UARTWATER_RXWATER_OFF);
448 - lpuart32_write(&sport->port, temp, UARTWATER);
449 - }
450 temp = lpuart32_read(&sport->port, UARTCTRL);
451 if (!sport->lpuart_dma_rx_use)
452 - temp |= UARTCTRL_RIE;
453 + temp |= UARTCTRL_RIE | UARTCTRL_ILIE;
454 if (!sport->lpuart_dma_tx_use)
455 temp |= UARTCTRL_TIE;
456 lpuart32_write(&sport->port, temp, UARTCTRL);
457 @@ -1572,12 +1715,12 @@ static int lpuart32_startup(struct uart_
458
459 spin_lock_irqsave(&sport->port.lock, flags);
460
461 - lpuart32_setup_watermark_enable(sport);
462 -
463 + lpuart32_hw_disable(sport);
464
465 lpuart_rx_dma_startup(sport);
466 lpuart_tx_dma_startup(sport);
467
468 + lpuart32_setup_watermark_enable(sport);
469 lpuart32_configure(sport);
470
471 spin_unlock_irqrestore(&sport->port.lock, flags);
472 @@ -1587,7 +1730,7 @@ static int lpuart32_startup(struct uart_
473 static void lpuart_dma_shutdown(struct lpuart_port *sport)
474 {
475 if (sport->lpuart_dma_rx_use) {
476 - del_timer_sync(&sport->lpuart_timer);
477 + lpuart_del_timer_sync(sport);
478 lpuart_dma_rx_free(&sport->port);
479 }
480
481 @@ -1628,11 +1771,22 @@ static void lpuart32_shutdown(struct uar
482
483 spin_lock_irqsave(&port->lock, flags);
484
485 + /* clear statue */
486 + temp = lpuart32_read(&sport->port, UARTSTAT);
487 + lpuart32_write(&sport->port, temp, UARTSTAT);
488 +
489 + /* disable Rx/Tx DMA */
490 + temp = lpuart32_read(port, UARTBAUD);
491 + temp &= ~(UARTBAUD_TDMAE | UARTBAUD_RDMAE | UARTBAUD_RIDMAE);
492 + lpuart32_write(port, temp, UARTBAUD);
493 +
494 /* disable Rx/Tx and interrupts */
495 temp = lpuart32_read(port, UARTCTRL);
496 - temp &= ~(UARTCTRL_TE | UARTCTRL_RE |
497 - UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE);
498 + temp &= ~(UARTCTRL_TE | UARTCTRL_RE | UARTCTRL_TIE |
499 + UARTCTRL_TCIE | UARTCTRL_RIE | UARTCTRL_ILIE |
500 + UARTCTRL_LOOPS);
501 lpuart32_write(port, temp, UARTCTRL);
502 + lpuart32_write(port, 0, UARTMODIR);
503
504 spin_unlock_irqrestore(&port->lock, flags);
505
506 @@ -1729,10 +1883,10 @@ lpuart_set_termios(struct uart_port *por
507 * baud rate and restart Rx DMA path.
508 *
509 * Since timer function acqures sport->port.lock, need to stop before
510 - * acquring same lock because otherwise del_timer_sync() can deadlock.
511 + * acquring same lock because otherwise lpuart_del_timer_sync() can deadlock.
512 */
513 if (old && sport->lpuart_dma_rx_use) {
514 - del_timer_sync(&sport->lpuart_timer);
515 + lpuart_del_timer_sync(sport);
516 lpuart_dma_rx_free(&sport->port);
517 }
518
519 @@ -1944,10 +2098,10 @@ lpuart32_set_termios(struct uart_port *p
520 * baud rate and restart Rx DMA path.
521 *
522 * Since timer function acqures sport->port.lock, need to stop before
523 - * acquring same lock because otherwise del_timer_sync() can deadlock.
524 + * acquring same lock because otherwise lpuart_del_timer_sync() can deadlock.
525 */
526 if (old && sport->lpuart_dma_rx_use) {
527 - del_timer_sync(&sport->lpuart_timer);
528 + lpuart_del_timer_sync(sport);
529 lpuart_dma_rx_free(&sport->port);
530 }
531
532 @@ -2456,6 +2610,10 @@ static int lpuart_probe(struct platform_
533 sport->port.dev = &pdev->dev;
534 sport->port.type = PORT_LPUART;
535 sport->devtype = sdata->devtype;
536 + sport->rx_dma_cyclic = sdata->rx_dma_cyclic;
537 + sport->rx_watermark = sdata->rx_watermark;
538 + sport->dma_eeop = is_imx8qxp_lpuart(sport);
539 +
540 ret = platform_get_irq(pdev, 0);
541 if (ret < 0)
542 return ret;
543 @@ -2618,7 +2776,7 @@ static int lpuart_suspend(struct device
544 * Rx DMA path before suspend and start Rx DMA path on resume.
545 */
546 if (irq_wake) {
547 - del_timer_sync(&sport->lpuart_timer);
548 + lpuart_del_timer_sync(sport);
549 lpuart_dma_rx_free(&sport->port);
550 }
551
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