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Commit 9414715a authored by Olaf Hering's avatar Olaf Hering Committed by Paul Mackerras
Browse files

[POWERPC] Autodetect serial console on efika 



Efika boards have to be booted with console=ttyPSC0 unless there is a
graphics card plugged in. Detect if the firmware stdout is the serial
connector.

Signed-off-by: default avatarOlaf Hering <olaf@aepfle.de>
Acked-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 02cc5114

arch/powerpc/platforms/52xx/efika.c

+26 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/initrd.h>

#include <linux/timer.h>

#include <linux/pci.h>

#include <linux/console.h>



#include <asm/io.h>

#include <asm/irq.h>
@@ -221,12 +222,37 @@ static int __init efika_probe(void) 
	return 1;

}



static void __init efika_init_early(void)

{

#ifdef CONFIG_SERIAL_MPC52xx

	struct device_node *stdout_node;

	const char *device_type;



	if (strstr(cmd_line, "console="))

		return;

	/* find the boot console from /chosen/stdout */

	if (!of_chosen)

		return;

	device_type = get_property(of_chosen, "linux,stdout-path", NULL);

	if (!device_type)

		return;

	stdout_node = of_find_node_by_path(device_type);

	if (stdout_node) {

		device_type = get_property(stdout_node, "device_type", NULL);

		if (device_type && strcmp(device_type, "serial") == 0)

			add_preferred_console("ttyPSC", 0, NULL);

		of_node_put(stdout_node);

	}

#endif

}



define_machine(efika)

{

	.name			= EFIKA_PLATFORM_NAME,

	.probe			= efika_probe,

	.setup_arch		= efika_setup_arch,

	.init			= mpc52xx_declare_of_platform_devices,

	.init_early		= efika_init_early,

	.show_cpuinfo		= efika_show_cpuinfo,

	.init_IRQ		= mpc52xx_init_irq,

	.get_irq		= mpc52xx_get_irq,