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serial: 8250: Add OF earlycon support 

This allows earlycon to be used without needing to specify the I/O
address on the kernel command line, if linux,stdout-path is specified
in the chosen node.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Scott Wood 2015-09-14 19:56:03 -05:00 committed by Greg Kroah-Hartman
parent 913c6c0e94
commit d05f15707b
1 changed files with 4 additions and 0 deletions
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4
drivers/tty/serial/8250/8250_early.c
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@ -29,6 +29,8 @@
#include <linux/tty.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/serial_reg.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
@ -152,3 +154,5 @@ int __init early_serial8250_setup(struct earlycon_device *device,
}
EARLYCON_DECLARE(uart8250, early_serial8250_setup);
EARLYCON_DECLARE(uart, early_serial8250_setup);
OF_EARLYCON_DECLARE(ns16550, "ns16550", early_serial8250_setup);
OF_EARLYCON_DECLARE(ns16550a, "ns16550a", early_serial8250_setup);