tty: serial: Drop unused efm32 serial driver

Support for this machine was just removed, so drop the now unused UART
driver, too.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20210115155130.185010-7-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 0 insertions, 866 deletions

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 34a2899e69c0..83f6ca4bf210 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1295,14 +1295,6 @@ config SERIAL_AR933X_NR_UARTS
 	  Set this to the number of serial ports you want the driver
 	  to support.
 
-config SERIAL_EFM32_UART
-	tristate "EFM32 UART/USART port"
-	depends on ARM && (ARCH_EFM32 || COMPILE_TEST)
-	select SERIAL_CORE
-	help
-	  This driver support the USART and UART ports on
-	  Energy Micro's efm32 SoCs.
-
 config SERIAL_MPS2_UART_CONSOLE
 	bool "MPS2 UART console support"
 	depends on SERIAL_MPS2_UART
@@ -1316,11 +1308,6 @@ config SERIAL_MPS2_UART
 	help
 	  This driver support the UART ports on ARM MPS2.
 
-config SERIAL_EFM32_UART_CONSOLE
-	bool "EFM32 UART/USART console support"
-	depends on SERIAL_EFM32_UART=y
-	select SERIAL_CORE_CONSOLE
-
 config SERIAL_ARC
 	tristate "ARC UART driver support"
 	select SERIAL_CORE
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index b85d53f9e9ff..ec2b74091f0c 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -73,7 +73,6 @@ obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o
 obj-$(CONFIG_SERIAL_TEGRA) += serial-tegra.o
 obj-$(CONFIG_SERIAL_TEGRA_TCU) += tegra-tcu.o
 obj-$(CONFIG_SERIAL_AR933X)   += ar933x_uart.o
-obj-$(CONFIG_SERIAL_EFM32_UART) += efm32-uart.o
 obj-$(CONFIG_SERIAL_ARC)	+= arc_uart.o
 obj-$(CONFIG_SERIAL_RP2)	+= rp2.o
 obj-$(CONFIG_SERIAL_FSL_LPUART)	+= fsl_lpuart.o
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
deleted file mode 100644
index f12f29cf4f31..000000000000
--- a/drivers/tty/serial/efm32-uart.c
+++ /dev/null
@@ -1,852 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/serial_core.h>
-#include <linux/tty_flip.h>
-#include <linux/slab.h>
-#include <linux/clk.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-
-#include <linux/platform_data/efm32-uart.h>
-
-#define DRIVER_NAME "efm32-uart"
-#define DEV_NAME "ttyefm"
-
-#define UARTn_CTRL		0x00
-#define UARTn_CTRL_SYNC		0x0001
-#define UARTn_CTRL_TXBIL		0x1000
-
-#define UARTn_FRAME		0x04
-#define UARTn_FRAME_DATABITS__MASK	0x000f
-#define UARTn_FRAME_DATABITS(n)		((n) - 3)
-#define UARTn_FRAME_PARITY__MASK	0x0300
-#define UARTn_FRAME_PARITY_NONE		0x0000
-#define UARTn_FRAME_PARITY_EVEN		0x0200
-#define UARTn_FRAME_PARITY_ODD		0x0300
-#define UARTn_FRAME_STOPBITS_HALF	0x0000
-#define UARTn_FRAME_STOPBITS_ONE	0x1000
-#define UARTn_FRAME_STOPBITS_TWO	0x3000
-
-#define UARTn_CMD		0x0c
-#define UARTn_CMD_RXEN			0x0001
-#define UARTn_CMD_RXDIS		0x0002
-#define UARTn_CMD_TXEN			0x0004
-#define UARTn_CMD_TXDIS		0x0008
-
-#define UARTn_STATUS		0x10
-#define UARTn_STATUS_TXENS		0x0002
-#define UARTn_STATUS_TXC		0x0020
-#define UARTn_STATUS_TXBL		0x0040
-#define UARTn_STATUS_RXDATAV		0x0080
-
-#define UARTn_CLKDIV		0x14
-
-#define UARTn_RXDATAX		0x18
-#define UARTn_RXDATAX_RXDATA__MASK	0x01ff
-#define UARTn_RXDATAX_PERR		0x4000
-#define UARTn_RXDATAX_FERR		0x8000
-/*
- * This is a software only flag used for ignore_status_mask and
- * read_status_mask! It's used for breaks that the hardware doesn't report
- * explicitly.
- */
-#define SW_UARTn_RXDATAX_BERR		0x2000
-
-#define UARTn_TXDATA		0x34
-
-#define UARTn_IF		0x40
-#define UARTn_IF_TXC			0x0001
-#define UARTn_IF_TXBL			0x0002
-#define UARTn_IF_RXDATAV		0x0004
-#define UARTn_IF_RXOF			0x0010
-
-#define UARTn_IFS		0x44
-#define UARTn_IFC		0x48
-#define UARTn_IEN		0x4c
-
-#define UARTn_ROUTE		0x54
-#define UARTn_ROUTE_LOCATION__MASK	0x0700
-#define UARTn_ROUTE_LOCATION(n)		(((n) << 8) & UARTn_ROUTE_LOCATION__MASK)
-#define UARTn_ROUTE_RXPEN		0x0001
-#define UARTn_ROUTE_TXPEN		0x0002
-
-struct efm32_uart_port {
-	struct uart_port port;
-	unsigned int txirq;
-	struct clk *clk;
-	struct efm32_uart_pdata pdata;
-};
-#define to_efm_port(_port) container_of(_port, struct efm32_uart_port, port)
-#define efm_debug(efm_port, format, arg...)			\
-	dev_dbg(efm_port->port.dev, format, ##arg)
-
-static void efm32_uart_write32(struct efm32_uart_port *efm_port,
-		u32 value, unsigned offset)
-{
-	writel_relaxed(value, efm_port->port.membase + offset);
-}
-
-static u32 efm32_uart_read32(struct efm32_uart_port *efm_port,
-		unsigned offset)
-{
-	return readl_relaxed(efm_port->port.membase + offset);
-}
-
-static unsigned int efm32_uart_tx_empty(struct uart_port *port)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-	u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
-
-	if (status & UARTn_STATUS_TXC)
-		return TIOCSER_TEMT;
-	else
-		return 0;
-}
-
-static void efm32_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-	/* sorry, neither handshaking lines nor loop functionallity */
-}
-
-static unsigned int efm32_uart_get_mctrl(struct uart_port *port)
-{
-	/* sorry, no handshaking lines available */
-	return TIOCM_CAR | TIOCM_CTS | TIOCM_DSR;
-}
-
-static void efm32_uart_stop_tx(struct uart_port *port)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-	u32 ien = efm32_uart_read32(efm_port,  UARTn_IEN);
-
-	efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
-	ien &= ~(UARTn_IF_TXC | UARTn_IF_TXBL);
-	efm32_uart_write32(efm_port, ien, UARTn_IEN);
-}
-
-static void efm32_uart_tx_chars(struct efm32_uart_port *efm_port)
-{
-	struct uart_port *port = &efm_port->port;
-	struct circ_buf *xmit = &port->state->xmit;
-
-	while (efm32_uart_read32(efm_port, UARTn_STATUS) &
-			UARTn_STATUS_TXBL) {
-		if (port->x_char) {
-			port->icount.tx++;
-			efm32_uart_write32(efm_port, port->x_char,
-					UARTn_TXDATA);
-			port->x_char = 0;
-			continue;
-		}
-		if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
-			port->icount.tx++;
-			efm32_uart_write32(efm_port, xmit->buf[xmit->tail],
-					UARTn_TXDATA);
-			xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		} else
-			break;
-	}
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-
-	if (!port->x_char && uart_circ_empty(xmit) &&
-			efm32_uart_read32(efm_port, UARTn_STATUS) &
-				UARTn_STATUS_TXC)
-		efm32_uart_stop_tx(port);
-}
-
-static void efm32_uart_start_tx(struct uart_port *port)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-	u32 ien;
-
-	efm32_uart_write32(efm_port,
-			UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IFC);
-	ien = efm32_uart_read32(efm_port, UARTn_IEN);
-	efm32_uart_write32(efm_port,
-			ien | UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IEN);
-	efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
-
-	efm32_uart_tx_chars(efm_port);
-}
-
-static void efm32_uart_stop_rx(struct uart_port *port)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-
-	efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD);
-}
-
-static void efm32_uart_break_ctl(struct uart_port *port, int ctl)
-{
-	/* not possible without fiddling with gpios */
-}
-
-static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port)
-{
-	struct uart_port *port = &efm_port->port;
-
-	while (efm32_uart_read32(efm_port, UARTn_STATUS) &
-			UARTn_STATUS_RXDATAV) {
-		u32 rxdata = efm32_uart_read32(efm_port, UARTn_RXDATAX);
-		int flag = 0;
-
-		/*
-		 * This is a reserved bit and I only saw it read as 0. But to be
-		 * sure not to be confused too much by new devices adhere to the
-		 * warning in the reference manual that reserved bits might
-		 * read as 1 in the future.
-		 */
-		rxdata &= ~SW_UARTn_RXDATAX_BERR;
-
-		port->icount.rx++;
-
-		if ((rxdata & UARTn_RXDATAX_FERR) &&
-				!(rxdata & UARTn_RXDATAX_RXDATA__MASK)) {
-			rxdata |= SW_UARTn_RXDATAX_BERR;
-			port->icount.brk++;
-			if (uart_handle_break(port))
-				continue;
-		} else if (rxdata & UARTn_RXDATAX_PERR)
-			port->icount.parity++;
-		else if (rxdata & UARTn_RXDATAX_FERR)
-			port->icount.frame++;
-
-		rxdata &= port->read_status_mask;
-
-		if (rxdata & SW_UARTn_RXDATAX_BERR)
-			flag = TTY_BREAK;
-		else if (rxdata & UARTn_RXDATAX_PERR)
-			flag = TTY_PARITY;
-		else if (rxdata & UARTn_RXDATAX_FERR)
-			flag = TTY_FRAME;
-		else if (uart_handle_sysrq_char(port,
-					rxdata & UARTn_RXDATAX_RXDATA__MASK))
-			continue;
-
-		if ((rxdata & port->ignore_status_mask) == 0)
-			tty_insert_flip_char(&port->state->port,
-					rxdata & UARTn_RXDATAX_RXDATA__MASK, flag);
-	}
-}
-
-static irqreturn_t efm32_uart_rxirq(int irq, void *data)
-{
-	struct efm32_uart_port *efm_port = data;
-	u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
-	int handled = IRQ_NONE;
-	struct uart_port *port = &efm_port->port;
-	struct tty_port *tport = &port->state->port;
-
-	spin_lock(&port->lock);
-
-	if (irqflag & UARTn_IF_RXDATAV) {
-		efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC);
-		efm32_uart_rx_chars(efm_port);
-
-		handled = IRQ_HANDLED;
-	}
-
-	if (irqflag & UARTn_IF_RXOF) {
-		efm32_uart_write32(efm_port, UARTn_IF_RXOF, UARTn_IFC);
-		port->icount.overrun++;
-		tty_insert_flip_char(tport, 0, TTY_OVERRUN);
-
-		handled = IRQ_HANDLED;
-	}
-
-	spin_unlock(&port->lock);
-
-	tty_flip_buffer_push(tport);
-
-	return handled;
-}
-
-static irqreturn_t efm32_uart_txirq(int irq, void *data)
-{
-	struct efm32_uart_port *efm_port = data;
-	u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
-
-	/* TXBL doesn't need to be cleared */
-	if (irqflag & UARTn_IF_TXC)
-		efm32_uart_write32(efm_port, UARTn_IF_TXC, UARTn_IFC);
-
-	if (irqflag & (UARTn_IF_TXC | UARTn_IF_TXBL)) {
-		efm32_uart_tx_chars(efm_port);
-		return IRQ_HANDLED;
-	} else
-		return IRQ_NONE;
-}
-
-static int efm32_uart_startup(struct uart_port *port)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-	int ret;
-
-	ret = clk_enable(efm_port->clk);
-	if (ret) {
-		efm_debug(efm_port, "failed to enable clk\n");
-		goto err_clk_enable;
-	}
-	port->uartclk = clk_get_rate(efm_port->clk);
-
-	/* Enable pins at configured location */
-	efm32_uart_write32(efm_port,
-			UARTn_ROUTE_LOCATION(efm_port->pdata.location) |
-			UARTn_ROUTE_RXPEN | UARTn_ROUTE_TXPEN,
-			UARTn_ROUTE);
-
-	ret = request_irq(port->irq, efm32_uart_rxirq, 0,
-			DRIVER_NAME, efm_port);
-	if (ret) {
-		efm_debug(efm_port, "failed to register rxirq\n");
-		goto err_request_irq_rx;
-	}
-
-	/* disable all irqs */
-	efm32_uart_write32(efm_port, 0, UARTn_IEN);
-
-	ret = request_irq(efm_port->txirq, efm32_uart_txirq, 0,
-			DRIVER_NAME, efm_port);
-	if (ret) {
-		efm_debug(efm_port, "failed to register txirq\n");
-		free_irq(port->irq, efm_port);
-err_request_irq_rx:
-
-		clk_disable(efm_port->clk);
-	} else {
-		efm32_uart_write32(efm_port,
-				UARTn_IF_RXDATAV | UARTn_IF_RXOF, UARTn_IEN);
-		efm32_uart_write32(efm_port, UARTn_CMD_RXEN, UARTn_CMD);
-	}
-
-err_clk_enable:
-	return ret;
-}
-
-static void efm32_uart_shutdown(struct uart_port *port)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-
-	efm32_uart_write32(efm_port, 0, UARTn_IEN);
-	free_irq(port->irq, efm_port);
-
-	clk_disable(efm_port->clk);
-}
-
-static void efm32_uart_set_termios(struct uart_port *port,
-		struct ktermios *new, struct ktermios *old)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-	unsigned long flags;
-	unsigned baud;
-	u32 clkdiv;
-	u32 frame = 0;
-
-	/* no modem control lines */
-	new->c_cflag &= ~(CRTSCTS | CMSPAR);
-
-	baud = uart_get_baud_rate(port, new, old,
-			DIV_ROUND_CLOSEST(port->uartclk, 16 * 8192),
-			DIV_ROUND_CLOSEST(port->uartclk, 16));
-
-	switch (new->c_cflag & CSIZE) {
-	case CS5:
-		frame |= UARTn_FRAME_DATABITS(5);
-		break;
-	case CS6:
-		frame |= UARTn_FRAME_DATABITS(6);
-		break;
-	case CS7:
-		frame |= UARTn_FRAME_DATABITS(7);
-		break;
-	case CS8:
-		frame |= UARTn_FRAME_DATABITS(8);
-		break;
-	}
-
-	if (new->c_cflag & CSTOPB)
-		/* the receiver only verifies the first stop bit */
-		frame |= UARTn_FRAME_STOPBITS_TWO;
-	else
-		frame |= UARTn_FRAME_STOPBITS_ONE;
-
-	if (new->c_cflag & PARENB) {
-		if (new->c_cflag & PARODD)
-			frame |= UARTn_FRAME_PARITY_ODD;
-		else
-			frame |= UARTn_FRAME_PARITY_EVEN;
-	} else
-		frame |= UARTn_FRAME_PARITY_NONE;
-
-	/*
-	 * the 6 lowest bits of CLKDIV are dc, bit 6 has value 0.25.
-	 * port->uartclk <= 14e6, so 4 * port->uartclk doesn't overflow.
-	 */
-	clkdiv = (DIV_ROUND_CLOSEST(4 * port->uartclk, 16 * baud) - 4) << 6;
-
-	spin_lock_irqsave(&port->lock, flags);
-
-	efm32_uart_write32(efm_port,
-			UARTn_CMD_TXDIS | UARTn_CMD_RXDIS, UARTn_CMD);
-
-	port->read_status_mask = UARTn_RXDATAX_RXDATA__MASK;
-	if (new->c_iflag & INPCK)
-		port->read_status_mask |=
-			UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
-	if (new->c_iflag & (IGNBRK | BRKINT | PARMRK))
-		port->read_status_mask |= SW_UARTn_RXDATAX_BERR;
-
-	port->ignore_status_mask = 0;
-	if (new->c_iflag & IGNPAR)
-		port->ignore_status_mask |=
-			UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
-	if (new->c_iflag & IGNBRK)
-		port->ignore_status_mask |= SW_UARTn_RXDATAX_BERR;
-
-	uart_update_timeout(port, new->c_cflag, baud);
-
-	efm32_uart_write32(efm_port, UARTn_CTRL_TXBIL, UARTn_CTRL);
-	efm32_uart_write32(efm_port, frame, UARTn_FRAME);
-	efm32_uart_write32(efm_port, clkdiv, UARTn_CLKDIV);
-
-	efm32_uart_write32(efm_port, UARTn_CMD_TXEN | UARTn_CMD_RXEN,
-			UARTn_CMD);
-
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static const char *efm32_uart_type(struct uart_port *port)
-{
-	return port->type == PORT_EFMUART ? "efm32-uart" : NULL;
-}
-
-static void efm32_uart_release_port(struct uart_port *port)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-
-	clk_unprepare(efm_port->clk);
-	clk_put(efm_port->clk);
-	iounmap(port->membase);
-}
-
-static int efm32_uart_request_port(struct uart_port *port)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-	int ret;
-
-	port->membase = ioremap(port->mapbase, 60);
-	if (!efm_port->port.membase) {
-		ret = -ENOMEM;
-		efm_debug(efm_port, "failed to remap\n");
-		goto err_ioremap;
-	}
-
-	efm_port->clk = clk_get(port->dev, NULL);
-	if (IS_ERR(efm_port->clk)) {
-		ret = PTR_ERR(efm_port->clk);
-		efm_debug(efm_port, "failed to get clock\n");
-		goto err_clk_get;
-	}
-
-	ret = clk_prepare(efm_port->clk);
-	if (ret) {
-		clk_put(efm_port->clk);
-err_clk_get:
-
-		iounmap(port->membase);
-err_ioremap:
-		return ret;
-	}
-	return 0;
-}
-
-static void efm32_uart_config_port(struct uart_port *port, int type)
-{
-	if (type & UART_CONFIG_TYPE &&
-			!efm32_uart_request_port(port))
-		port->type = PORT_EFMUART;
-}
-
-static int efm32_uart_verify_port(struct uart_port *port,
-		struct serial_struct *serinfo)
-{
-	int ret = 0;
-
-	if (serinfo->type != PORT_UNKNOWN && serinfo->type != PORT_EFMUART)
-		ret = -EINVAL;
-
-	return ret;
-}
-
-static const struct uart_ops efm32_uart_pops = {
-	.tx_empty = efm32_uart_tx_empty,
-	.set_mctrl = efm32_uart_set_mctrl,
-	.get_mctrl = efm32_uart_get_mctrl,
-	.stop_tx = efm32_uart_stop_tx,
-	.start_tx = efm32_uart_start_tx,
-	.stop_rx = efm32_uart_stop_rx,
-	.break_ctl = efm32_uart_break_ctl,
-	.startup = efm32_uart_startup,
-	.shutdown = efm32_uart_shutdown,
-	.set_termios = efm32_uart_set_termios,
-	.type = efm32_uart_type,
-	.release_port = efm32_uart_release_port,
-	.request_port = efm32_uart_request_port,
-	.config_port = efm32_uart_config_port,
-	.verify_port = efm32_uart_verify_port,
-};
-
-static struct efm32_uart_port *efm32_uart_ports[5];
-
-#ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE
-static void efm32_uart_console_putchar(struct uart_port *port, int ch)
-{
-	struct efm32_uart_port *efm_port = to_efm_port(port);
-	unsigned int timeout = 0x400;
-	u32 status;
-
-	while (1) {
-		status = efm32_uart_read32(efm_port, UARTn_STATUS);
-
-		if (status & UARTn_STATUS_TXBL)
-			break;
-		if (!timeout--)
-			return;
-	}
-	efm32_uart_write32(efm_port, ch, UARTn_TXDATA);
-}
-
-static void efm32_uart_console_write(struct console *co, const char *s,
-		unsigned int count)
-{
-	struct efm32_uart_port *efm_port = efm32_uart_ports[co->index];
-	u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
-	unsigned int timeout = 0x400;
-
-	if (!(status & UARTn_STATUS_TXENS))
-		efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
-
-	uart_console_write(&efm_port->port, s, count,
-			efm32_uart_console_putchar);
-
-	/* Wait for the transmitter to become empty */
-	while (1) {
-		u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
-		if (status & UARTn_STATUS_TXC)
-			break;
-		if (!timeout--)
-			break;
-	}
-
-	if (!(status & UARTn_STATUS_TXENS))
-		efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
-}
-
-static void efm32_uart_console_get_options(struct efm32_uart_port *efm_port,
-		int *baud, int *parity, int *bits)
-{
-	u32 ctrl = efm32_uart_read32(efm_port, UARTn_CTRL);
-	u32 route, clkdiv, frame;
-
-	if (ctrl & UARTn_CTRL_SYNC)
-		/* not operating in async mode */
-		return;
-
-	route = efm32_uart_read32(efm_port, UARTn_ROUTE);
-	if (!(route & UARTn_ROUTE_TXPEN))
-		/* tx pin not routed */
-		return;
-
-	clkdiv = efm32_uart_read32(efm_port, UARTn_CLKDIV);
-
-	*baud = DIV_ROUND_CLOSEST(4 * efm_port->port.uartclk,
-			16 * (4 + (clkdiv >> 6)));
-
-	frame = efm32_uart_read32(efm_port, UARTn_FRAME);
-	switch (frame & UARTn_FRAME_PARITY__MASK) {
-	case UARTn_FRAME_PARITY_ODD:
-		*parity = 'o';
-		break;
-	case UARTn_FRAME_PARITY_EVEN:
-		*parity = 'e';
-		break;
-	default:
-		*parity = 'n';
-	}
-
-	*bits = (frame & UARTn_FRAME_DATABITS__MASK) -
-			UARTn_FRAME_DATABITS(4) + 4;
-
-	efm_debug(efm_port, "get_opts: options=%d%c%d\n",
-			*baud, *parity, *bits);
-}
-
-static int efm32_uart_console_setup(struct console *co, char *options)
-{
-	struct efm32_uart_port *efm_port;
-	int baud = 115200;
-	int bits = 8;
-	int parity = 'n';
-	int flow = 'n';
-	int ret;
-
-	if (co->index < 0 || co->index >= ARRAY_SIZE(efm32_uart_ports)) {
-		unsigned i;
-		for (i = 0; i < ARRAY_SIZE(efm32_uart_ports); ++i) {
-			if (efm32_uart_ports[i]) {
-				pr_warn("efm32-console: fall back to console index %u (from %hhi)\n",
-						i, co->index);
-				co->index = i;
-				break;
-			}
-		}
-	}
-
-	efm_port = efm32_uart_ports[co->index];
-	if (!efm_port) {
-		pr_warn("efm32-console: No port at %d\n", co->index);
-		return -ENODEV;
-	}
-
-	ret = clk_prepare(efm_port->clk);
-	if (ret) {
-		dev_warn(efm_port->port.dev,
-				"console: clk_prepare failed: %d\n", ret);
-		return ret;
-	}
-
-	efm_port->port.uartclk = clk_get_rate(efm_port->clk);
-
-	if (options)
-		uart_parse_options(options, &baud, &parity, &bits, &flow);
-	else
-		efm32_uart_console_get_options(efm_port,
-				&baud, &parity, &bits);
-
-	return uart_set_options(&efm_port->port, co, baud, parity, bits, flow);
-}
-
-static struct uart_driver efm32_uart_reg;
-
-static struct console efm32_uart_console = {
-	.name = DEV_NAME,
-	.write = efm32_uart_console_write,
-	.device = uart_console_device,
-	.setup = efm32_uart_console_setup,
-	.flags = CON_PRINTBUFFER,
-	.index = -1,
-	.data = &efm32_uart_reg,
-};
-
-#else
-#define efm32_uart_console (*(struct console *)NULL)
-#endif /* ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE / else */
-
-static struct uart_driver efm32_uart_reg = {
-	.owner = THIS_MODULE,
-	.driver_name = DRIVER_NAME,
-	.dev_name = DEV_NAME,
-	.nr = ARRAY_SIZE(efm32_uart_ports),
-	.cons = &efm32_uart_console,
-};
-
-static int efm32_uart_probe_dt(struct platform_device *pdev,
-		struct efm32_uart_port *efm_port)
-{
-	struct device_node *np = pdev->dev.of_node;
-	u32 location;
-	int ret;
-
-	if (!np)
-		return 1;
-
-	ret = of_property_read_u32(np, "energymicro,location", &location);
-
-	if (ret)
-		/* fall back to wrongly namespaced property */
-		ret = of_property_read_u32(np, "efm32,location", &location);
-
-	if (ret)
-		/* fall back to old and (wrongly) generic property "location" */
-		ret = of_property_read_u32(np, "location", &location);
-
-	if (!ret) {
-		if (location > 5) {
-			dev_err(&pdev->dev, "invalid location\n");
-			return -EINVAL;
-		}
-		efm_debug(efm_port, "using location %u\n", location);
-		efm_port->pdata.location = location;
-	} else {
-		efm_debug(efm_port, "fall back to location 0\n");
-	}
-
-	ret = of_alias_get_id(np, "serial");
-	if (ret < 0) {
-		dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
-		return ret;
-	} else {
-		efm_port->port.line = ret;
-		return 0;
-	}
-
-}
-
-static int efm32_uart_probe(struct platform_device *pdev)
-{
-	struct efm32_uart_port *efm_port;
-	struct resource *res;
-	unsigned int line;
-	int ret;
-
-	efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL);
-	if (!efm_port) {
-		dev_dbg(&pdev->dev, "failed to allocate private data\n");
-		return -ENOMEM;
-	}
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		ret = -ENODEV;
-		dev_dbg(&pdev->dev, "failed to determine base address\n");
-		goto err_get_base;
-	}
-
-	if (resource_size(res) < 60) {
-		ret = -EINVAL;
-		dev_dbg(&pdev->dev, "memory resource too small\n");
-		goto err_too_small;
-	}
-
-	ret = platform_get_irq(pdev, 0);
-	if (ret <= 0) {
-		dev_dbg(&pdev->dev, "failed to get rx irq\n");
-		goto err_get_rxirq;
-	}
-
-	efm_port->port.irq = ret;
-
-	ret = platform_get_irq(pdev, 1);
-	if (ret <= 0)
-		ret = efm_port->port.irq + 1;
-
-	efm_port->txirq = ret;
-
-	efm_port->port.dev = &pdev->dev;
-	efm_port->port.mapbase = res->start;
-	efm_port->port.type = PORT_EFMUART;
-	efm_port->port.iotype = UPIO_MEM32;
-	efm_port->port.fifosize = 2;
-	efm_port->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_EFM32_UART_CONSOLE);
-	efm_port->port.ops = &efm32_uart_pops;
-	efm_port->port.flags = UPF_BOOT_AUTOCONF;
-
-	ret = efm32_uart_probe_dt(pdev, efm_port);
-	if (ret > 0) {
-		/* not created by device tree */
-		const struct efm32_uart_pdata *pdata = dev_get_platdata(&pdev->dev);
-
-		efm_port->port.line = pdev->id;
-
-		if (pdata)
-			efm_port->pdata = *pdata;
-	} else if (ret < 0)
-		goto err_probe_dt;
-
-	line = efm_port->port.line;
-
-	if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
-		efm32_uart_ports[line] = efm_port;
-
-	ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port);
-	if (ret) {
-		dev_dbg(&pdev->dev, "failed to add port: %d\n", ret);
-
-		if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
-			efm32_uart_ports[line] = NULL;
-err_probe_dt:
-err_get_rxirq:
-err_too_small:
-err_get_base:
-		kfree(efm_port);
-	} else {
-		platform_set_drvdata(pdev, efm_port);
-		dev_dbg(&pdev->dev, "\\o/\n");
-	}
-
-	return ret;
-}
-
-static int efm32_uart_remove(struct platform_device *pdev)
-{
-	struct efm32_uart_port *efm_port = platform_get_drvdata(pdev);
-	unsigned int line = efm_port->port.line;
-
-	uart_remove_one_port(&efm32_uart_reg, &efm_port->port);
-
-	if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
-		efm32_uart_ports[line] = NULL;
-
-	kfree(efm_port);
-
-	return 0;
-}
-
-static const struct of_device_id efm32_uart_dt_ids[] = {
-	{
-		.compatible = "energymicro,efm32-uart",
-	}, {
-		/* doesn't follow the "vendor,device" scheme, don't use */
-		.compatible = "efm32,uart",
-	}, {
-		/* sentinel */
-	}
-};
-MODULE_DEVICE_TABLE(of, efm32_uart_dt_ids);
-
-static struct platform_driver efm32_uart_driver = {
-	.probe = efm32_uart_probe,
-	.remove = efm32_uart_remove,
-
-	.driver = {
-		.name = DRIVER_NAME,
-		.of_match_table = efm32_uart_dt_ids,
-	},
-};
-
-static int __init efm32_uart_init(void)
-{
-	int ret;
-
-	ret = uart_register_driver(&efm32_uart_reg);
-	if (ret)
-		return ret;
-
-	ret = platform_driver_register(&efm32_uart_driver);
-	if (ret)
-		uart_unregister_driver(&efm32_uart_reg);
-
-	pr_info("EFM32 UART/USART driver\n");
-
-	return ret;
-}
-module_init(efm32_uart_init);
-
-static void __exit efm32_uart_exit(void)
-{
-	platform_driver_unregister(&efm32_uart_driver);
-	uart_unregister_driver(&efm32_uart_reg);
-}
-module_exit(efm32_uart_exit);
-
-MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
-MODULE_DESCRIPTION("EFM32 UART/USART driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRIVER_NAME);