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Commit 1ab8e4b1 authored by Kevin Cernekee's avatar Kevin Cernekee Committed by Greg Kroah-Hartman
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tty: serial: bcm63xx: Enable DT earlycon support 



This enables early console output if there is a chosen/stdout-path
property referencing a UART node with the "brcm,bcm6345-uart" compatible
string.  The bootloader sets up the pinmux and baud/parity/etc.
Tested on bcm3384 (MIPS, DT).

Signed-off-by: default avatarKevin Cernekee <cernekee@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e1a184ee

drivers/tty/serial/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1297,6 +1297,7 @@ config SERIAL_BCM63XX_CONSOLE 
	bool "Console on BCM63xx serial port"

	depends on SERIAL_BCM63XX=y

	select SERIAL_CORE_CONSOLE

	select SERIAL_EARLYCON

	help

	  If you have enabled the serial port on the BCM63xx CPU

	  you can make it the console by answering Y to this option.

drivers/tty/serial/bcm63xx_uart.c

+20 −0
Original line number Diff line number Diff line
@@ -782,6 +782,26 @@ static int __init bcm63xx_console_init(void) 


console_initcall(bcm63xx_console_init);



static void bcm_early_write(struct console *con, const char *s, unsigned n)

{

	struct earlycon_device *dev = con->data;



	uart_console_write(&dev->port, s, n, bcm_console_putchar);

	wait_for_xmitr(&dev->port);

}



static int __init bcm_early_console_setup(struct earlycon_device *device,

					  const char *opt)

{

	if (!device->port.membase)

		return -ENODEV;



	device->con->write = bcm_early_write;

	return 0;

}



OF_EARLYCON_DECLARE(bcm63xx_uart, "brcm,bcm6345-uart", bcm_early_console_setup);



#define BCM63XX_CONSOLE	(&bcm63xx_console)

#else

#define BCM63XX_CONSOLE	NULL