Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f0ca330b authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Paul Mackerras
Browse files

[POWERPC] Workaround Pegasos incorrect ISA "ranges" 



The Pegasos firmware doesn't create a valid "ranges" property for the
ISA bridge, thus causing translation of ISA addresses and IO ports to
fail. This fixes it, thus re-enabling proper early serial console to
work on Pegasos.

Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent d1a8df91

arch/powerpc/kernel/prom_init.c

+34 −0
Original line number Diff line number Diff line
@@ -2030,6 +2030,39 @@ static void __init fixup_device_tree_maple(void) 
#define fixup_device_tree_maple()

#endif



#ifdef CONFIG_PPC_CHRP

/* Pegasos lacks the "ranges" property in the isa node */

static void __init fixup_device_tree_chrp(void)

{

	phandle isa;

	u32 isa_ranges[6];

	char *name;

	int rc;



	name = "/pci@80000000/isa@c";

	isa = call_prom("finddevice", 1, 1, ADDR(name));

	if (!PHANDLE_VALID(isa))

		return;



	rc = prom_getproplen(isa, "ranges");

	if (rc != 0 && rc != PROM_ERROR)

		return;



	prom_printf("Fixing up missing ISA range on Pegasos...\n");



	isa_ranges[0] = 0x1;

	isa_ranges[1] = 0x0;

	isa_ranges[2] = 0x01006000;

	isa_ranges[3] = 0x0;

	isa_ranges[4] = 0x0;

	isa_ranges[5] = 0x00010000;

	prom_setprop(isa, name, "ranges",

			isa_ranges, sizeof(isa_ranges));

}

#else

#define fixup_device_tree_chrp()

#endif



#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)

static void __init fixup_device_tree_pmac(void)

{
@@ -2077,6 +2110,7 @@ static void __init fixup_device_tree_pmac(void) 
static void __init fixup_device_tree(void)

{

	fixup_device_tree_maple();

	fixup_device_tree_chrp();

	fixup_device_tree_pmac();

}