1 // SPDX-License-Identifier: GPL-2.0+
9  * Copyright 2014 Oleksij Rempel <linux@rempel-privat.de>
11  * Copyright 2008-2010 Freescale Semiconductor, Inc.
34 #include <linux/dma-mapping.h>
90 #define AUART_LINECTRL_WLEN(v)			((((v) - 5) & 0x3) << 5)
138  * RW. Receive Timeout Counter Value: number of 8-bit-time to wait before
140  * input is idle, then the watchdog counter will decrement each bit-time. Note
141  * 7-bit-time is added to the programmed value, so a value of zero will set
142  * the counter to 7-bit-time, a value of 0x1 gives 15-bit-time and so on. Also
146  * value is 0x3 (31 bit-time).
175 /* RW. Set DTR. When this bit is 1, the output is 0. */
218 /* Auto-Boud Timeout */
267  * (or DTR) pin.
277  * If 1 and DIR_CTRL = 1, pin DTR is used for direction control.
284 /* RW. Enable RS-485/EIA-485 Normal Multidrop Mode (NMM) */
293  * RW. Contains the direction control (RTS or DTR) delay value. This delay time
299 /* WO. Auto-baud time-out interrupt clear bit. */
301 /* WO. End of auto-baud interrupt clear bit. */
305 /* Auto-baud mode select bit. 0 - Mode 0, 1 - Mode 1. */
308  * Auto-baud start (auto-baud is running). Auto-baud run bit. This bit is
309  * automatically cleared after auto-baud completion.
320 /* RW. Baud Rate Mode: 1 - Enable sync mode. 0 - async mode. */
322 /* RW. 1 - MSB bit send frist; 0 - LSB bit frist. */
324 /* RW. 1 - sample rate = 8 x Baudrate; 0 - sample rate = 16 x Baudrate. */
326 /* RW. 1 - Set word length to 9bit. 0 - use ASM9260_BM_LCTRL_WLEN */
338 /* RW. 1 - ISO7816 mode; 0 - USART mode */
376 	/* The size of the array - must be last */
439 	struct mctrl_gpios	*gpios;  member
446 		.compatible = "fsl,imx28-auart",
449 		.compatible = "fsl,imx23-auart",
452 		.compatible = "alphascale,asm9260-auart",
460 	return s->devtype == IMX28_AUART;  in is_imx28_auart()
465 	return s->devtype == ASM9260_AUART;  in is_asm9260_auart()
470 	return s->flags & MXS_AUART_DMA_ENABLED;  in auart_dma_enabled()
476 	return uap->vendor->reg_offset[reg];  in mxs_reg_to_offset()
482 	void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);  in mxs_read()
490 	void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);  in mxs_write()
498 	void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);  in mxs_set()
506 	void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);  in mxs_clr()
520 	struct circ_buf *xmit = &s->port.state->xmit;  in dma_tx_callback()
522 	dma_unmap_sg(s->dev, &s->tx_sgl, 1, DMA_TO_DEVICE);  in dma_tx_callback()
525 	clear_bit(MXS_AUART_DMA_TX_SYNC, &s->flags);  in dma_tx_callback()
530 		uart_write_wakeup(&s->port);  in dma_tx_callback()
538 	struct scatterlist *sgl = &s->tx_sgl;  in mxs_auart_dma_tx()
539 	struct dma_chan *channel = s->tx_dma_chan;  in mxs_auart_dma_tx()
547 		dev_err(s->dev, "step 1 error\n");  in mxs_auart_dma_tx()
548 		return -EINVAL;  in mxs_auart_dma_tx()
552 	sg_init_one(sgl, s->tx_dma_buf, size);  in mxs_auart_dma_tx()
553 	dma_map_sg(s->dev, sgl, 1, DMA_TO_DEVICE);  in mxs_auart_dma_tx()
557 		dev_err(s->dev, "step 2 error\n");  in mxs_auart_dma_tx()
558 		return -EINVAL;  in mxs_auart_dma_tx()
562 	desc->callback = dma_tx_callback;  in mxs_auart_dma_tx()
563 	desc->callback_param = s;  in mxs_auart_dma_tx()
571 	struct circ_buf *xmit = &s->port.state->xmit;  in mxs_auart_tx_chars()
578 		void *buffer = s->tx_dma_buf;  in mxs_auart_tx_chars()
580 		if (test_and_set_bit(MXS_AUART_DMA_TX_SYNC, &s->flags))  in mxs_auart_tx_chars()
583 		while (!uart_circ_empty(xmit) && !uart_tx_stopped(&s->port)) {  in mxs_auart_tx_chars()
584 			size = min_t(u32, UART_XMIT_SIZE - i,  in mxs_auart_tx_chars()
585 				     CIRC_CNT_TO_END(xmit->head,  in mxs_auart_tx_chars()
586 						     xmit->tail,  in mxs_auart_tx_chars()
588 			memcpy(buffer + i, xmit->buf + xmit->tail, size);  in mxs_auart_tx_chars()
589 			xmit->tail = (xmit->tail + size) & (UART_XMIT_SIZE - 1);  in mxs_auart_tx_chars()
596 		if (uart_tx_stopped(&s->port))  in mxs_auart_tx_chars()
597 			mxs_auart_stop_tx(&s->port);  in mxs_auart_tx_chars()
602 			clear_bit(MXS_AUART_DMA_TX_SYNC, &s->flags);  in mxs_auart_tx_chars()
608 	pending = uart_port_tx(&s->port, ch,  in mxs_auart_tx_chars()
626 	s->port.icount.rx++;  in mxs_auart_rx_char()
629 		s->port.icount.brk++;  in mxs_auart_rx_char()
630 		if (uart_handle_break(&s->port))  in mxs_auart_rx_char()
633 		s->port.icount.parity++;  in mxs_auart_rx_char()
635 		s->port.icount.frame++;  in mxs_auart_rx_char()
641 	stat &= s->port.read_status_mask;  in mxs_auart_rx_char()
651 		s->port.icount.overrun++;  in mxs_auart_rx_char()
653 	if (uart_handle_sysrq_char(&s->port, c))  in mxs_auart_rx_char()
656 	uart_insert_char(&s->port, stat, AUART_STAT_OERR, c, flag);  in mxs_auart_rx_char()
673 	tty_flip_buffer_push(&s->port.state->port);  in mxs_auart_rx_chars()
684 	if (u->type != PORT_UNKNOWN && u->type != PORT_IMX)  in mxs_auart_verify_port()
685 		return -EINVAL;  in mxs_auart_verify_port()
697 	return dev_name(s->dev);  in mxs_auart_type()
720 	mctrl_gpio_set(s->gpios, mctrl);  in mxs_auart_set_mctrl()
728 	mctrl_diff = mctrl ^ s->mctrl_prev;  in mxs_auart_modem_status()
729 	s->mctrl_prev = mctrl;  in mxs_auart_modem_status()
730 	if (mctrl_diff & MCTRL_ANY_DELTA && s->ms_irq_enabled &&  in mxs_auart_modem_status()
731 						s->port.state != NULL) {  in mxs_auart_modem_status()
733 			s->port.icount.rng++;  in mxs_auart_modem_status()
735 			s->port.icount.dsr++;  in mxs_auart_modem_status()
737 			uart_handle_dcd_change(&s->port, mctrl & TIOCM_CD);  in mxs_auart_modem_status()
739 			uart_handle_cts_change(&s->port, mctrl & TIOCM_CTS);  in mxs_auart_modem_status()
741 		wake_up_interruptible(&s->port.state->port.delta_msr_wait);  in mxs_auart_modem_status()
755 	return mctrl_gpio_get(s->gpios, &mctrl);  in mxs_auart_get_mctrl()
768 	if (s->ms_irq_enabled)  in mxs_auart_enable_ms()
771 	s->ms_irq_enabled = true;  in mxs_auart_enable_ms()
773 	if (s->gpio_irq[UART_GPIO_CTS] >= 0)  in mxs_auart_enable_ms()
774 		enable_irq(s->gpio_irq[UART_GPIO_CTS]);  in mxs_auart_enable_ms()
777 	if (s->gpio_irq[UART_GPIO_DSR] >= 0)  in mxs_auart_enable_ms()
778 		enable_irq(s->gpio_irq[UART_GPIO_DSR]);  in mxs_auart_enable_ms()
780 	if (s->gpio_irq[UART_GPIO_RI] >= 0)  in mxs_auart_enable_ms()
781 		enable_irq(s->gpio_irq[UART_GPIO_RI]);  in mxs_auart_enable_ms()
783 	if (s->gpio_irq[UART_GPIO_DCD] >= 0)  in mxs_auart_enable_ms()
784 		enable_irq(s->gpio_irq[UART_GPIO_DCD]);  in mxs_auart_enable_ms()
797 	if (!s->ms_irq_enabled)  in mxs_auart_disable_ms()
800 	s->ms_irq_enabled = false;  in mxs_auart_disable_ms()
802 	if (s->gpio_irq[UART_GPIO_CTS] >= 0)  in mxs_auart_disable_ms()
803 		disable_irq(s->gpio_irq[UART_GPIO_CTS]);  in mxs_auart_disable_ms()
806 	if (s->gpio_irq[UART_GPIO_DSR] >= 0)  in mxs_auart_disable_ms()
807 		disable_irq(s->gpio_irq[UART_GPIO_DSR]);  in mxs_auart_disable_ms()
809 	if (s->gpio_irq[UART_GPIO_RI] >= 0)  in mxs_auart_disable_ms()
810 		disable_irq(s->gpio_irq[UART_GPIO_RI]);  in mxs_auart_disable_ms()
812 	if (s->gpio_irq[UART_GPIO_DCD] >= 0)  in mxs_auart_disable_ms()
813 		disable_irq(s->gpio_irq[UART_GPIO_DCD]);  in mxs_auart_disable_ms()
820 	struct tty_port *port = &s->port.state->port;  in dma_rx_callback()
824 	dma_unmap_sg(s->dev, &s->rx_sgl, 1, DMA_FROM_DEVICE);  in dma_rx_callback()
831 	tty_insert_flip_string(port, s->rx_dma_buf, count);  in dma_rx_callback()
843 	struct scatterlist *sgl = &s->rx_sgl;  in mxs_auart_dma_prep_rx()
844 	struct dma_chan *channel = s->rx_dma_chan;  in mxs_auart_dma_prep_rx()
854 		dev_err(s->dev, "step 1 error\n");  in mxs_auart_dma_prep_rx()
855 		return -EINVAL;  in mxs_auart_dma_prep_rx()
859 	sg_init_one(sgl, s->rx_dma_buf, UART_XMIT_SIZE);  in mxs_auart_dma_prep_rx()
860 	dma_map_sg(s->dev, sgl, 1, DMA_FROM_DEVICE);  in mxs_auart_dma_prep_rx()
864 		dev_err(s->dev, "step 2 error\n");  in mxs_auart_dma_prep_rx()
865 		return -1;  in mxs_auart_dma_prep_rx()
869 	desc->callback = dma_rx_callback;  in mxs_auart_dma_prep_rx()
870 	desc->callback_param = s;  in mxs_auart_dma_prep_rx()
878 	if (s->tx_dma_chan) {  in mxs_auart_dma_exit_channel()
879 		dma_release_channel(s->tx_dma_chan);  in mxs_auart_dma_exit_channel()
880 		s->tx_dma_chan = NULL;  in mxs_auart_dma_exit_channel()
882 	if (s->rx_dma_chan) {  in mxs_auart_dma_exit_channel()
883 		dma_release_channel(s->rx_dma_chan);  in mxs_auart_dma_exit_channel()
884 		s->rx_dma_chan = NULL;  in mxs_auart_dma_exit_channel()
887 	kfree(s->tx_dma_buf);  in mxs_auart_dma_exit_channel()
888 	kfree(s->rx_dma_buf);  in mxs_auart_dma_exit_channel()
889 	s->tx_dma_buf = NULL;  in mxs_auart_dma_exit_channel()
890 	s->rx_dma_buf = NULL;  in mxs_auart_dma_exit_channel()
900 	s->flags &= ~MXS_AUART_DMA_ENABLED;  in mxs_auart_dma_exit()
901 	clear_bit(MXS_AUART_DMA_TX_SYNC, &s->flags);  in mxs_auart_dma_exit()
902 	clear_bit(MXS_AUART_DMA_RX_READY, &s->flags);  in mxs_auart_dma_exit()
911 	s->rx_dma_chan = dma_request_slave_channel(s->dev, "rx");  in mxs_auart_dma_init()
912 	if (!s->rx_dma_chan)  in mxs_auart_dma_init()
914 	s->rx_dma_buf = kzalloc(UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);  in mxs_auart_dma_init()
915 	if (!s->rx_dma_buf)  in mxs_auart_dma_init()
919 	s->tx_dma_chan = dma_request_slave_channel(s->dev, "tx");  in mxs_auart_dma_init()
920 	if (!s->tx_dma_chan)  in mxs_auart_dma_init()
922 	s->tx_dma_buf = kzalloc(UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);  in mxs_auart_dma_init()
923 	if (!s->tx_dma_buf)  in mxs_auart_dma_init()
927 	s->flags |= MXS_AUART_DMA_ENABLED;  in mxs_auart_dma_init()
928 	dev_dbg(s->dev, "enabled the DMA support.");  in mxs_auart_dma_init()
931 	s->port.fifosize = UART_XMIT_SIZE;  in mxs_auart_dma_init()
937 	return -EINVAL;  in mxs_auart_dma_init()
941 #define RTS_AT_AUART()	!mctrl_gpio_to_gpiod(s->gpios, UART_GPIO_RTS)
942 #define CTS_AT_AUART()	!mctrl_gpio_to_gpiod(s->gpios, UART_GPIO_CTS)
951 	cflag = termios->c_cflag;  in mxs_auart_settermios()
967 	u->read_status_mask = AUART_STAT_OERR;  in mxs_auart_settermios()
969 	if (termios->c_iflag & INPCK)  in mxs_auart_settermios()
970 		u->read_status_mask |= AUART_STAT_PERR;  in mxs_auart_settermios()
971 	if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))  in mxs_auart_settermios()
972 		u->read_status_mask |= AUART_STAT_BERR;  in mxs_auart_settermios()
977 	u->ignore_status_mask = 0;  in mxs_auart_settermios()
978 	if (termios->c_iflag & IGNPAR)  in mxs_auart_settermios()
979 		u->ignore_status_mask |= AUART_STAT_PERR;  in mxs_auart_settermios()
980 	if (termios->c_iflag & IGNBRK) {  in mxs_auart_settermios()
981 		u->ignore_status_mask |= AUART_STAT_BERR;  in mxs_auart_settermios()
986 		if (termios->c_iflag & IGNPAR)  in mxs_auart_settermios()
987 			u->ignore_status_mask |= AUART_STAT_OERR;  in mxs_auart_settermios()
1012 				&& test_bit(MXS_AUART_RTSCTS, &s->flags)) {  in mxs_auart_settermios()
1028 					  u->uartclk * 4 / 0x3FFFFF,  in mxs_auart_settermios()
1029 					  u->uartclk / 16);  in mxs_auart_settermios()
1030 		div = u->uartclk * 4 / baud;  in mxs_auart_settermios()
1032 		baud_min = DIV_ROUND_UP(u->uartclk * 32,  in mxs_auart_settermios()
1034 		baud_max = u->uartclk * 32 / AUART_LINECTRL_BAUD_DIV_MIN;  in mxs_auart_settermios()
1036 		div = DIV_ROUND_CLOSEST(u->uartclk * 32, baud);  in mxs_auart_settermios()
1045 	uart_update_timeout(u, termios->c_cflag, baud);  in mxs_auart_settermios()
1049 		!test_and_set_bit(MXS_AUART_DMA_RX_READY, &s->flags)) {  in mxs_auart_settermios()
1056 			dev_err(s->dev, "We can not start up the DMA.\n");  in mxs_auart_settermios()
1060 	/* CTS flow-control and modem-status interrupts */  in mxs_auart_settermios()
1061 	if (UART_ENABLE_MS(u, termios->c_cflag))  in mxs_auart_settermios()
1070 	if (termios->c_line == N_PPS) {  in mxs_auart_set_ldisc()
1071 		port->flags |= UPF_HARDPPS_CD;  in mxs_auart_set_ldisc()
1074 		port->flags &= ~UPF_HARDPPS_CD;  in mxs_auart_set_ldisc()
1082 	u32 mctrl_temp = s->mctrl_prev;  in mxs_auart_irq_handle()
1094 	if (irq == s->gpio_irq[UART_GPIO_CTS] ||  in mxs_auart_irq_handle()
1095 	    irq == s->gpio_irq[UART_GPIO_DCD] ||  in mxs_auart_irq_handle()
1096 	    irq == s->gpio_irq[UART_GPIO_DSR] ||  in mxs_auart_irq_handle()
1097 	    irq == s->gpio_irq[UART_GPIO_RI])  in mxs_auart_irq_handle()
1099 				mctrl_gpio_get(s->gpios, &mctrl_temp));  in mxs_auart_irq_handle()
1102 		if (CTS_AT_AUART() && s->ms_irq_enabled)  in mxs_auart_irq_handle()
1103 			uart_handle_cts_change(&s->port,  in mxs_auart_irq_handle()
1160 	dev_err(s->dev, "Failed to reset the unit.");  in mxs_auart_reset_assert()
1168 	ret = clk_prepare_enable(s->clk);  in mxs_auart_startup()
1186 	u->fifosize = MXS_AUART_FIFO_SIZE;  in mxs_auart_startup()
1195 	mctrl_gpio_get(s->gpios, &s->mctrl_prev);  in mxs_auart_startup()
1197 	s->ms_irq_enabled = false;  in mxs_auart_startup()
1220 	clk_disable_unprepare(s->clk);  in mxs_auart_shutdown()
1297 		if (!to--)  in mxs_auart_console_putchar()
1313 	if (co->index >= MXS_AUART_PORTS || co->index < 0)  in auart_console_write()
1316 	s = auart_port[co->index];  in auart_console_write()
1317 	port = &s->port;  in auart_console_write()
1319 	clk_enable(s->clk);  in auart_console_write()
1333 		if (!to--)  in auart_console_write()
1348 	clk_disable(s->clk);  in auart_console_write()
1355 	struct uart_port *port = &s->port;  in auart_console_get_options()
1377 		>> (AUART_LINECTRL_BAUD_DIVINT_SHIFT - 6);  in auart_console_get_options()
1383 	*baud = (port->uartclk << 2) / quot;  in auart_console_get_options()
1401 	if (co->index == -1 || co->index >= ARRAY_SIZE(auart_port))  in auart_console_setup()
1402 		co->index = 0;  in auart_console_setup()
1403 	s = auart_port[co->index];  in auart_console_setup()
1405 		return -ENODEV;  in auart_console_setup()
1407 	ret = clk_prepare_enable(s->clk);  in auart_console_setup()
1416 	ret = uart_set_options(&s->port, co, baud, parity, bits, flow);  in auart_console_setup()
1418 	clk_disable_unprepare(s->clk);  in auart_console_setup()
1429 	.index		= -1,
1449 		s->vendor = &vendor_alphascale_asm9260;  in mxs_init_regs()
1451 		s->vendor = &vendor_freescale_stmp37xx;  in mxs_init_regs()
1460 		s->clk = devm_clk_get(&pdev->dev, NULL);  in mxs_get_clks()
1461 		return PTR_ERR_OR_ZERO(s->clk);  in mxs_get_clks()
1464 	s->clk = devm_clk_get(s->dev, "mod");  in mxs_get_clks()
1465 	if (IS_ERR(s->clk)) {  in mxs_get_clks()
1466 		dev_err(s->dev, "Failed to get \"mod\" clk\n");  in mxs_get_clks()
1467 		return PTR_ERR(s->clk);  in mxs_get_clks()
1470 	s->clk_ahb = devm_clk_get(s->dev, "ahb");  in mxs_get_clks()
1471 	if (IS_ERR(s->clk_ahb)) {  in mxs_get_clks()
1472 		dev_err(s->dev, "Failed to get \"ahb\" clk\n");  in mxs_get_clks()
1473 		return PTR_ERR(s->clk_ahb);  in mxs_get_clks()
1476 	err = clk_prepare_enable(s->clk_ahb);  in mxs_get_clks()
1478 		dev_err(s->dev, "Failed to enable ahb_clk!\n");  in mxs_get_clks()
1482 	err = clk_set_rate(s->clk, clk_get_rate(s->clk_ahb));  in mxs_get_clks()
1484 		dev_err(s->dev, "Failed to set rate!\n");  in mxs_get_clks()
1488 	err = clk_prepare_enable(s->clk);  in mxs_get_clks()
1490 		dev_err(s->dev, "Failed to enable clk!\n");  in mxs_get_clks()
1497 	clk_disable_unprepare(s->clk_ahb);  in mxs_get_clks()
1506 	s->gpios = mctrl_gpio_init_noauto(dev, 0);  in mxs_auart_init_gpios()
1507 	if (IS_ERR(s->gpios))  in mxs_auart_init_gpios()
1508 		return PTR_ERR(s->gpios);  in mxs_auart_init_gpios()
1512 		if (test_bit(MXS_AUART_RTSCTS, &s->flags))  in mxs_auart_init_gpios()
1515 		clear_bit(MXS_AUART_RTSCTS, &s->flags);  in mxs_auart_init_gpios()
1519 		gpiod = mctrl_gpio_to_gpiod(s->gpios, i);  in mxs_auart_init_gpios()
1521 			s->gpio_irq[i] = gpiod_to_irq(gpiod);  in mxs_auart_init_gpios()
1523 			s->gpio_irq[i] = -EINVAL;  in mxs_auart_init_gpios()
1534 		if (s->gpio_irq[i] >= 0)  in mxs_auart_free_gpio_irq()
1535 			free_irq(s->gpio_irq[i], s);  in mxs_auart_free_gpio_irq()
1540 	int *irq = s->gpio_irq;  in mxs_auart_request_gpio_irq()
1550 				IRQ_TYPE_EDGE_BOTH, dev_name(s->dev), s);  in mxs_auart_request_gpio_irq()
1552 			dev_err(s->dev, "%s - Can't get %d irq\n",  in mxs_auart_request_gpio_irq()
1560 	while (err && (i-- > 0))  in mxs_auart_request_gpio_irq()
1569 	struct device_node *np = pdev->dev.of_node;  in mxs_auart_probe()
1575 	s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL);  in mxs_auart_probe()
1577 		return -ENOMEM;  in mxs_auart_probe()
1579 	s->port.dev = &pdev->dev;  in mxs_auart_probe()
1580 	s->dev = &pdev->dev;  in mxs_auart_probe()
1584 		dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);  in mxs_auart_probe()
1587 	s->port.line = ret;  in mxs_auart_probe()
1589 	if (of_property_read_bool(np, "uart-has-rtscts") ||  in mxs_auart_probe()
1590 	    of_property_read_bool(np, "fsl,uart-has-rtscts") /* deprecated */)  in mxs_auart_probe()
1591 		set_bit(MXS_AUART_RTSCTS, &s->flags);  in mxs_auart_probe()
1593 	if (s->port.line >= ARRAY_SIZE(auart_port)) {  in mxs_auart_probe()
1594 		dev_err(&pdev->dev, "serial%d out of range\n", s->port.line);  in mxs_auart_probe()
1595 		return -EINVAL;  in mxs_auart_probe()
1598 	s->devtype = (enum mxs_auart_type)of_device_get_match_data(&pdev->dev);  in mxs_auart_probe()
1606 		ret = -ENXIO;  in mxs_auart_probe()
1610 	s->port.mapbase = r->start;  in mxs_auart_probe()
1611 	s->port.membase = ioremap(r->start, resource_size(r));  in mxs_auart_probe()
1612 	if (!s->port.membase) {  in mxs_auart_probe()
1613 		ret = -ENOMEM;  in mxs_auart_probe()
1616 	s->port.ops = &mxs_auart_ops;  in mxs_auart_probe()
1617 	s->port.iotype = UPIO_MEM;  in mxs_auart_probe()
1618 	s->port.fifosize = MXS_AUART_FIFO_SIZE;  in mxs_auart_probe()
1619 	s->port.uartclk = clk_get_rate(s->clk);  in mxs_auart_probe()
1620 	s->port.type = PORT_IMX;  in mxs_auart_probe()
1621 	s->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_MXS_AUART_CONSOLE);  in mxs_auart_probe()
1625 	s->mctrl_prev = 0;  in mxs_auart_probe()
1633 	s->port.irq = irq;  in mxs_auart_probe()
1634 	ret = devm_request_irq(&pdev->dev, irq, mxs_auart_irq_handle, 0,  in mxs_auart_probe()
1635 			       dev_name(&pdev->dev), s);  in mxs_auart_probe()
1641 	ret = mxs_auart_init_gpios(s, &pdev->dev);  in mxs_auart_probe()
1643 		dev_err(&pdev->dev, "Failed to initialize GPIOs.\n");  in mxs_auart_probe()
1654 	auart_port[s->port.line] = s;  in mxs_auart_probe()
1658 	ret = uart_add_one_port(&auart_driver, &s->port);  in mxs_auart_probe()
1664 		dev_info(&pdev->dev, "Found APPUART ASM9260\n");  in mxs_auart_probe()
1667 		dev_info(&pdev->dev, "Found APPUART %d.%d.%d\n",  in mxs_auart_probe()
1676 	auart_port[pdev->id] = NULL;  in mxs_auart_probe()
1679 	iounmap(s->port.membase);  in mxs_auart_probe()
1683 		clk_disable_unprepare(s->clk);  in mxs_auart_probe()
1684 		clk_disable_unprepare(s->clk_ahb);  in mxs_auart_probe()
1693 	uart_remove_one_port(&auart_driver, &s->port);  in mxs_auart_remove()
1694 	auart_port[pdev->id] = NULL;  in mxs_auart_remove()
1696 	iounmap(s->port.membase);  in mxs_auart_remove()
1698 		clk_disable_unprepare(s->clk);  in mxs_auart_remove()
1699 		clk_disable_unprepare(s->clk_ahb);  in mxs_auart_remove()
1709 		.name = "mxs-auart",
1743 MODULE_ALIAS("platform:mxs-auart");