2 * Based on drivers/serial/8250.c by Russell King.
4 * Author: Nicolas Pitre
5 * Created: Feb 20, 2003
6 * Copyright: (C) 2003 Monta Vista Software, Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * Note 1: This driver is made separate from the already too overloaded
14 * 8250.c because it needs some kirks of its own and that'll make it
15 * easier to add DMA support.
17 * Note 2: I'm too sick of device allocation policies for serial ports.
18 * If someone else wants to request an "official" allocation of major/minor
19 * for this driver please be my guest. And don't forget that new hardware
20 * to come from Intel might have more than 3 or 4 of those UARTs. Let's
21 * hope for a better port registration and dynamic device allocation scheme
22 * with the serial core maintainer satisfaction to appear soon.
26 #if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
30 #include <linux/module.h>
31 #include <linux/ioport.h>
32 #include <linux/init.h>
33 #include <linux/console.h>
34 #include <linux/sysrq.h>
35 #include <linux/serial_reg.h>
36 #include <linux/circ_buf.h>
37 #include <linux/delay.h>
38 #include <linux/interrupt.h>
40 #include <linux/platform_device.h>
41 #include <linux/tty.h>
42 #include <linux/tty_flip.h>
43 #include <linux/serial_core.h>
44 #include <linux/clk.h>
46 #include <linux/slab.h>
48 #define PXA_NAME_LEN 8
50 struct uart_pxa_port {
51 struct uart_port port;
55 unsigned int lsr_break_flag;
57 char name[PXA_NAME_LEN];
60 static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
63 return readl(up->port.membase + offset);
66 static inline void serial_out(struct uart_pxa_port *up, int offset, int value)
69 writel(value, up->port.membase + offset);
72 static void serial_pxa_enable_ms(struct uart_port *port)
74 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
76 up->ier |= UART_IER_MSI;
77 serial_out(up, UART_IER, up->ier);
80 static void serial_pxa_stop_tx(struct uart_port *port)
82 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
84 if (up->ier & UART_IER_THRI) {
85 up->ier &= ~UART_IER_THRI;
86 serial_out(up, UART_IER, up->ier);
90 static void serial_pxa_stop_rx(struct uart_port *port)
92 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
94 up->ier &= ~UART_IER_RLSI;
95 up->port.read_status_mask &= ~UART_LSR_DR;
96 serial_out(up, UART_IER, up->ier);
99 static inline void receive_chars(struct uart_pxa_port *up, int *status)
101 struct tty_struct *tty = up->port.state->port.tty;
102 unsigned int ch, flag;
106 /* work around Errata #20 according to
107 * Intel(R) PXA27x Processor Family
108 * Specification Update (May 2005)
111 * Disable the Reciever Time Out Interrupt via IER[RTOEI]
113 up->ier &= ~UART_IER_RTOIE;
114 serial_out(up, UART_IER, up->ier);
116 ch = serial_in(up, UART_RX);
118 up->port.icount.rx++;
120 if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
121 UART_LSR_FE | UART_LSR_OE))) {
123 * For statistics only
125 if (*status & UART_LSR_BI) {
126 *status &= ~(UART_LSR_FE | UART_LSR_PE);
127 up->port.icount.brk++;
129 * We do the SysRQ and SAK checking
130 * here because otherwise the break
131 * may get masked by ignore_status_mask
132 * or read_status_mask.
134 if (uart_handle_break(&up->port))
136 } else if (*status & UART_LSR_PE)
137 up->port.icount.parity++;
138 else if (*status & UART_LSR_FE)
139 up->port.icount.frame++;
140 if (*status & UART_LSR_OE)
141 up->port.icount.overrun++;
144 * Mask off conditions which should be ignored.
146 *status &= up->port.read_status_mask;
148 #ifdef CONFIG_SERIAL_PXA_CONSOLE
149 if (up->port.line == up->port.cons->index) {
150 /* Recover the break flag from console xmit */
151 *status |= up->lsr_break_flag;
152 up->lsr_break_flag = 0;
155 if (*status & UART_LSR_BI) {
157 } else if (*status & UART_LSR_PE)
159 else if (*status & UART_LSR_FE)
163 if (uart_handle_sysrq_char(&up->port, ch))
166 uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag);
169 *status = serial_in(up, UART_LSR);
170 } while ((*status & UART_LSR_DR) && (max_count-- > 0));
171 tty_flip_buffer_push(tty);
173 /* work around Errata #20 according to
174 * Intel(R) PXA27x Processor Family
175 * Specification Update (May 2005)
178 * No more data in FIFO: Re-enable RTO interrupt via IER[RTOIE]
180 up->ier |= UART_IER_RTOIE;
181 serial_out(up, UART_IER, up->ier);
184 static void transmit_chars(struct uart_pxa_port *up)
186 struct circ_buf *xmit = &up->port.state->xmit;
189 if (up->port.x_char) {
190 serial_out(up, UART_TX, up->port.x_char);
191 up->port.icount.tx++;
195 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
196 serial_pxa_stop_tx(&up->port);
200 count = up->port.fifosize / 2;
202 serial_out(up, UART_TX, xmit->buf[xmit->tail]);
203 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
204 up->port.icount.tx++;
205 if (uart_circ_empty(xmit))
207 } while (--count > 0);
209 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
210 uart_write_wakeup(&up->port);
213 if (uart_circ_empty(xmit))
214 serial_pxa_stop_tx(&up->port);
217 static void serial_pxa_start_tx(struct uart_port *port)
219 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
221 if (!(up->ier & UART_IER_THRI)) {
222 up->ier |= UART_IER_THRI;
223 serial_out(up, UART_IER, up->ier);
227 static inline void check_modem_status(struct uart_pxa_port *up)
231 status = serial_in(up, UART_MSR);
233 if ((status & UART_MSR_ANY_DELTA) == 0)
236 if (status & UART_MSR_TERI)
237 up->port.icount.rng++;
238 if (status & UART_MSR_DDSR)
239 up->port.icount.dsr++;
240 if (status & UART_MSR_DDCD)
241 uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
242 if (status & UART_MSR_DCTS)
243 uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
245 wake_up_interruptible(&up->port.state->port.delta_msr_wait);
249 * This handles the interrupt from one port.
251 static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id)
253 struct uart_pxa_port *up = dev_id;
254 unsigned int iir, lsr;
256 iir = serial_in(up, UART_IIR);
257 if (iir & UART_IIR_NO_INT)
259 lsr = serial_in(up, UART_LSR);
260 if (lsr & UART_LSR_DR)
261 receive_chars(up, &lsr);
262 check_modem_status(up);
263 if (lsr & UART_LSR_THRE)
268 static unsigned int serial_pxa_tx_empty(struct uart_port *port)
270 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
274 spin_lock_irqsave(&up->port.lock, flags);
275 ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
276 spin_unlock_irqrestore(&up->port.lock, flags);
281 static unsigned int serial_pxa_get_mctrl(struct uart_port *port)
283 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
284 unsigned char status;
287 status = serial_in(up, UART_MSR);
290 if (status & UART_MSR_DCD)
292 if (status & UART_MSR_RI)
294 if (status & UART_MSR_DSR)
296 if (status & UART_MSR_CTS)
301 static void serial_pxa_set_mctrl(struct uart_port *port, unsigned int mctrl)
303 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
304 unsigned char mcr = 0;
306 if (mctrl & TIOCM_RTS)
308 if (mctrl & TIOCM_DTR)
310 if (mctrl & TIOCM_OUT1)
311 mcr |= UART_MCR_OUT1;
312 if (mctrl & TIOCM_OUT2)
313 mcr |= UART_MCR_OUT2;
314 if (mctrl & TIOCM_LOOP)
315 mcr |= UART_MCR_LOOP;
319 serial_out(up, UART_MCR, mcr);
322 static void serial_pxa_break_ctl(struct uart_port *port, int break_state)
324 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
327 spin_lock_irqsave(&up->port.lock, flags);
328 if (break_state == -1)
329 up->lcr |= UART_LCR_SBC;
331 up->lcr &= ~UART_LCR_SBC;
332 serial_out(up, UART_LCR, up->lcr);
333 spin_unlock_irqrestore(&up->port.lock, flags);
337 static void serial_pxa_dma_init(struct pxa_uart *up)
340 pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_receive_dma, up);
344 pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_transmit_dma, up);
347 up->dmadesc = kmalloc(4 * sizeof(pxa_dma_desc), GFP_KERNEL);
353 pxa_free_dma(up->txdma);
355 pxa_free_dma(up->rxdma);
361 static int serial_pxa_startup(struct uart_port *port)
363 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
367 if (port->line == 3) /* HWUART */
368 up->mcr |= UART_MCR_AFE;
372 up->port.uartclk = clk_get_rate(up->clk);
377 retval = request_irq(up->port.irq, serial_pxa_irq, 0, up->name, up);
382 * Clear the FIFO buffers and disable them.
383 * (they will be reenabled in set_termios())
385 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO);
386 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
387 UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
388 serial_out(up, UART_FCR, 0);
391 * Clear the interrupt registers.
393 (void) serial_in(up, UART_LSR);
394 (void) serial_in(up, UART_RX);
395 (void) serial_in(up, UART_IIR);
396 (void) serial_in(up, UART_MSR);
399 * Now, initialize the UART
401 serial_out(up, UART_LCR, UART_LCR_WLEN8);
403 spin_lock_irqsave(&up->port.lock, flags);
404 up->port.mctrl |= TIOCM_OUT2;
405 serial_pxa_set_mctrl(&up->port, up->port.mctrl);
406 spin_unlock_irqrestore(&up->port.lock, flags);
409 * Finally, enable interrupts. Note: Modem status interrupts
410 * are set via set_termios(), which will be occurring imminently
411 * anyway, so we don't enable them here.
413 up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE;
414 serial_out(up, UART_IER, up->ier);
417 * And clear the interrupt registers again for luck.
419 (void) serial_in(up, UART_LSR);
420 (void) serial_in(up, UART_RX);
421 (void) serial_in(up, UART_IIR);
422 (void) serial_in(up, UART_MSR);
427 static void serial_pxa_shutdown(struct uart_port *port)
429 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
432 free_irq(up->port.irq, up);
435 * Disable interrupts from this port
438 serial_out(up, UART_IER, 0);
440 spin_lock_irqsave(&up->port.lock, flags);
441 up->port.mctrl &= ~TIOCM_OUT2;
442 serial_pxa_set_mctrl(&up->port, up->port.mctrl);
443 spin_unlock_irqrestore(&up->port.lock, flags);
446 * Disable break condition and FIFOs
448 serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
449 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
450 UART_FCR_CLEAR_RCVR |
451 UART_FCR_CLEAR_XMIT);
452 serial_out(up, UART_FCR, 0);
456 serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
457 struct ktermios *old)
459 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
460 unsigned char cval, fcr = 0;
462 unsigned int baud, quot;
465 switch (termios->c_cflag & CSIZE) {
467 cval = UART_LCR_WLEN5;
470 cval = UART_LCR_WLEN6;
473 cval = UART_LCR_WLEN7;
477 cval = UART_LCR_WLEN8;
481 if (termios->c_cflag & CSTOPB)
482 cval |= UART_LCR_STOP;
483 if (termios->c_cflag & PARENB)
484 cval |= UART_LCR_PARITY;
485 if (!(termios->c_cflag & PARODD))
486 cval |= UART_LCR_EPAR;
489 * Ask the core to calculate the divisor for us.
491 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
492 quot = uart_get_divisor(port, baud);
494 if ((up->port.uartclk / quot) < (2400 * 16))
495 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1;
496 else if ((up->port.uartclk / quot) < (230400 * 16))
497 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8;
499 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR32;
502 * Ok, we're now changing the port state. Do it with
503 * interrupts disabled.
505 spin_lock_irqsave(&up->port.lock, flags);
508 * Ensure the port will be enabled.
509 * This is required especially for serial console.
511 up->ier |= UART_IER_UUE;
514 * Update the per-port timeout.
516 uart_update_timeout(port, termios->c_cflag, baud);
518 up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
519 if (termios->c_iflag & INPCK)
520 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
521 if (termios->c_iflag & (BRKINT | PARMRK))
522 up->port.read_status_mask |= UART_LSR_BI;
525 * Characters to ignore
527 up->port.ignore_status_mask = 0;
528 if (termios->c_iflag & IGNPAR)
529 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
530 if (termios->c_iflag & IGNBRK) {
531 up->port.ignore_status_mask |= UART_LSR_BI;
533 * If we're ignoring parity and break indicators,
534 * ignore overruns too (for real raw support).
536 if (termios->c_iflag & IGNPAR)
537 up->port.ignore_status_mask |= UART_LSR_OE;
541 * ignore all characters if CREAD is not set
543 if ((termios->c_cflag & CREAD) == 0)
544 up->port.ignore_status_mask |= UART_LSR_DR;
547 * CTS flow control flag and modem status interrupts
549 up->ier &= ~UART_IER_MSI;
550 if (UART_ENABLE_MS(&up->port, termios->c_cflag))
551 up->ier |= UART_IER_MSI;
553 serial_out(up, UART_IER, up->ier);
555 if (termios->c_cflag & CRTSCTS)
556 up->mcr |= UART_MCR_AFE;
558 up->mcr &= ~UART_MCR_AFE;
560 serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
561 serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */
564 * work around Errata #75 according to Intel(R) PXA27x Processor Family
565 * Specification Update (Nov 2005)
567 dll = serial_in(up, UART_DLL);
568 WARN_ON(dll != (quot & 0xff));
570 serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */
571 serial_out(up, UART_LCR, cval); /* reset DLAB */
572 up->lcr = cval; /* Save LCR */
573 serial_pxa_set_mctrl(&up->port, up->port.mctrl);
574 serial_out(up, UART_FCR, fcr);
575 spin_unlock_irqrestore(&up->port.lock, flags);
579 serial_pxa_pm(struct uart_port *port, unsigned int state,
580 unsigned int oldstate)
582 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
585 clk_prepare_enable(up->clk);
587 clk_disable_unprepare(up->clk);
590 static void serial_pxa_release_port(struct uart_port *port)
594 static int serial_pxa_request_port(struct uart_port *port)
599 static void serial_pxa_config_port(struct uart_port *port, int flags)
601 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
602 up->port.type = PORT_PXA;
606 serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser)
608 /* we don't want the core code to modify any port params */
613 serial_pxa_type(struct uart_port *port)
615 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
619 static struct uart_pxa_port *serial_pxa_ports[4];
620 static struct uart_driver serial_pxa_reg;
622 #ifdef CONFIG_SERIAL_PXA_CONSOLE
624 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
627 * Wait for transmitter & holding register to empty
629 static inline void wait_for_xmitr(struct uart_pxa_port *up)
631 unsigned int status, tmout = 10000;
633 /* Wait up to 10ms for the character(s) to be sent. */
635 status = serial_in(up, UART_LSR);
637 if (status & UART_LSR_BI)
638 up->lsr_break_flag = UART_LSR_BI;
643 } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
645 /* Wait up to 1s for flow control if necessary */
646 if (up->port.flags & UPF_CONS_FLOW) {
649 ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
654 static void serial_pxa_console_putchar(struct uart_port *port, int ch)
656 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
659 serial_out(up, UART_TX, ch);
663 * Print a string to the serial port trying not to disturb
664 * any possible real use of the port...
666 * The console_lock must be held when we get here.
669 serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
671 struct uart_pxa_port *up = serial_pxa_ports[co->index];
676 clk_prepare_enable(up->clk);
678 local_irq_save(flags);
681 else if (oops_in_progress)
682 locked = spin_trylock(&up->port.lock);
684 spin_lock(&up->port.lock);
687 * First save the IER then disable the interrupts
689 ier = serial_in(up, UART_IER);
690 serial_out(up, UART_IER, UART_IER_UUE);
692 uart_console_write(&up->port, s, count, serial_pxa_console_putchar);
695 * Finally, wait for transmitter to become empty
696 * and restore the IER
699 serial_out(up, UART_IER, ier);
702 spin_unlock(&up->port.lock);
703 local_irq_restore(flags);
705 clk_disable_unprepare(up->clk);
708 #ifdef CONFIG_CONSOLE_POLL
710 * Console polling routines for writing and reading from the uart while
711 * in an interrupt or debug context.
714 static int serial_pxa_get_poll_char(struct uart_port *port)
716 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
717 unsigned char lsr = serial_in(up, UART_LSR);
719 while (!(lsr & UART_LSR_DR))
720 lsr = serial_in(up, UART_LSR);
722 return serial_in(up, UART_RX);
726 static void serial_pxa_put_poll_char(struct uart_port *port,
730 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
733 * First save the IER then disable the interrupts
735 ier = serial_in(up, UART_IER);
736 serial_out(up, UART_IER, UART_IER_UUE);
740 * Send the character out.
741 * If a LF, also do CR...
743 serial_out(up, UART_TX, c);
746 serial_out(up, UART_TX, 13);
750 * Finally, wait for transmitter to become empty
751 * and restore the IER
754 serial_out(up, UART_IER, ier);
757 #endif /* CONFIG_CONSOLE_POLL */
760 serial_pxa_console_setup(struct console *co, char *options)
762 struct uart_pxa_port *up;
768 if (co->index == -1 || co->index >= serial_pxa_reg.nr)
770 up = serial_pxa_ports[co->index];
775 uart_parse_options(options, &baud, &parity, &bits, &flow);
777 return uart_set_options(&up->port, co, baud, parity, bits, flow);
780 static struct console serial_pxa_console = {
782 .write = serial_pxa_console_write,
783 .device = uart_console_device,
784 .setup = serial_pxa_console_setup,
785 .flags = CON_PRINTBUFFER,
787 .data = &serial_pxa_reg,
790 #define PXA_CONSOLE &serial_pxa_console
792 #define PXA_CONSOLE NULL
795 struct uart_ops serial_pxa_pops = {
796 .tx_empty = serial_pxa_tx_empty,
797 .set_mctrl = serial_pxa_set_mctrl,
798 .get_mctrl = serial_pxa_get_mctrl,
799 .stop_tx = serial_pxa_stop_tx,
800 .start_tx = serial_pxa_start_tx,
801 .stop_rx = serial_pxa_stop_rx,
802 .enable_ms = serial_pxa_enable_ms,
803 .break_ctl = serial_pxa_break_ctl,
804 .startup = serial_pxa_startup,
805 .shutdown = serial_pxa_shutdown,
806 .set_termios = serial_pxa_set_termios,
808 .type = serial_pxa_type,
809 .release_port = serial_pxa_release_port,
810 .request_port = serial_pxa_request_port,
811 .config_port = serial_pxa_config_port,
812 .verify_port = serial_pxa_verify_port,
813 #ifdef CONFIG_CONSOLE_POLL
814 .poll_get_char = serial_pxa_get_poll_char,
815 .poll_put_char = serial_pxa_put_poll_char,
819 static struct uart_driver serial_pxa_reg = {
820 .owner = THIS_MODULE,
821 .driver_name = "PXA serial",
830 static int serial_pxa_suspend(struct device *dev)
832 struct uart_pxa_port *sport = dev_get_drvdata(dev);
835 uart_suspend_port(&serial_pxa_reg, &sport->port);
840 static int serial_pxa_resume(struct device *dev)
842 struct uart_pxa_port *sport = dev_get_drvdata(dev);
845 uart_resume_port(&serial_pxa_reg, &sport->port);
850 static const struct dev_pm_ops serial_pxa_pm_ops = {
851 .suspend = serial_pxa_suspend,
852 .resume = serial_pxa_resume,
856 static struct of_device_id serial_pxa_dt_ids[] = {
857 { .compatible = "mrvl,pxa-uart", },
858 { .compatible = "mrvl,mmp-uart", },
861 MODULE_DEVICE_TABLE(of, serial_pxa_dt_ids);
863 static int serial_pxa_probe_dt(struct platform_device *pdev,
864 struct uart_pxa_port *sport)
866 struct device_node *np = pdev->dev.of_node;
872 ret = of_alias_get_id(np, "serial");
874 dev_err(&pdev->dev, "failed to get alias id, errno %d\n", ret);
877 sport->port.line = ret;
881 static int serial_pxa_probe(struct platform_device *dev)
883 struct uart_pxa_port *sport;
884 struct resource *mmres, *irqres;
887 mmres = platform_get_resource(dev, IORESOURCE_MEM, 0);
888 irqres = platform_get_resource(dev, IORESOURCE_IRQ, 0);
889 if (!mmres || !irqres)
892 sport = kzalloc(sizeof(struct uart_pxa_port), GFP_KERNEL);
896 sport->clk = clk_get(&dev->dev, NULL);
897 if (IS_ERR(sport->clk)) {
898 ret = PTR_ERR(sport->clk);
902 sport->port.type = PORT_PXA;
903 sport->port.iotype = UPIO_MEM;
904 sport->port.mapbase = mmres->start;
905 sport->port.irq = irqres->start;
906 sport->port.fifosize = 64;
907 sport->port.ops = &serial_pxa_pops;
908 sport->port.dev = &dev->dev;
909 sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
910 sport->port.uartclk = clk_get_rate(sport->clk);
912 ret = serial_pxa_probe_dt(dev, sport);
914 sport->port.line = dev->id;
917 snprintf(sport->name, PXA_NAME_LEN - 1, "UART%d", sport->port.line + 1);
919 sport->port.membase = ioremap(mmres->start, resource_size(mmres));
920 if (!sport->port.membase) {
925 serial_pxa_ports[sport->port.line] = sport;
927 uart_add_one_port(&serial_pxa_reg, &sport->port);
928 platform_set_drvdata(dev, sport);
939 static int serial_pxa_remove(struct platform_device *dev)
941 struct uart_pxa_port *sport = platform_get_drvdata(dev);
943 platform_set_drvdata(dev, NULL);
945 uart_remove_one_port(&serial_pxa_reg, &sport->port);
952 static struct platform_driver serial_pxa_driver = {
953 .probe = serial_pxa_probe,
954 .remove = serial_pxa_remove,
957 .name = "pxa2xx-uart",
958 .owner = THIS_MODULE,
960 .pm = &serial_pxa_pm_ops,
962 .of_match_table = serial_pxa_dt_ids,
966 int __init serial_pxa_init(void)
970 ret = uart_register_driver(&serial_pxa_reg);
974 ret = platform_driver_register(&serial_pxa_driver);
976 uart_unregister_driver(&serial_pxa_reg);
981 void __exit serial_pxa_exit(void)
983 platform_driver_unregister(&serial_pxa_driver);
984 uart_unregister_driver(&serial_pxa_reg);
987 module_init(serial_pxa_init);
988 module_exit(serial_pxa_exit);
990 MODULE_LICENSE("GPL");
991 MODULE_ALIAS("platform:pxa2xx-uart");