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| author | Hollis Blanchard <hollisb@us.ibm.com> | 2006-05-25 16:36:53 -0500 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-05-26 22:39:00 +1000 |
| commit | 54f4ee183aea859eb09f141dad3fc3c6f4fe0446 (patch) | |
| tree | 94bfc121c036460c64f7a72f9a46152ee6fdd263 /arch | |
| parent | 8e30a9a299ca30b6c4072c2182238d5f5dd1590d (diff) | |
| download | lwn-54f4ee183aea859eb09f141dad3fc3c6f4fe0446.tar.gz lwn-54f4ee183aea859eb09f141dad3fc3c6f4fe0446.zip | |
[PATCH] powerpc: fix RTC/NVRAM accesses on Maple
Due to a firmware device tree bug, RTC and NVRAM accesses (including
halt/reboot) on Maple have been broken since January, when an untested
build fix went in. This code patches the device tree in Linux.
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/prom_init.c | 48 |
1 files changed, 45 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 2d80653aa2af..41e9ab40cd54 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -2057,10 +2057,45 @@ static void __init flatten_device_tree(void) } - -static void __init fixup_device_tree(void) +#ifdef CONFIG_PPC_MAPLE +/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. + * The values are bad, and it doesn't even have the right number of cells. */ +static void __init fixup_device_tree_maple(void) { + phandle isa; + u32 isa_ranges[6]; + + isa = call_prom("finddevice", 1, 1, ADDR("/ht@0/isa@4")); + if (!PHANDLE_VALID(isa)) + return; + + if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) + == PROM_ERROR) + return; + + if (isa_ranges[0] != 0x1 || + isa_ranges[1] != 0xf4000000 || + isa_ranges[2] != 0x00010000) + return; + + prom_printf("fixing up bogus ISA range on Maple...\n"); + + isa_ranges[0] = 0x1; + isa_ranges[1] = 0x0; + isa_ranges[2] = 0x01002000; /* IO space; PCI device = 4 */ + isa_ranges[3] = 0x0; + isa_ranges[4] = 0x0; + isa_ranges[5] = 0x00010000; + prom_setprop(isa, "/ht@0/isa@4", "ranges", + isa_ranges, sizeof(isa_ranges)); +} +#else +#define fixup_device_tree_maple() +#endif + #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) +static void __init fixup_device_tree_pmac(void) +{ phandle u3, i2c, mpic; u32 u3_rev; u32 interrupts[2]; @@ -2097,9 +2132,16 @@ static void __init fixup_device_tree(void) parent = (u32)mpic; prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", &parent, sizeof(parent)); -#endif } +#else +#define fixup_device_tree_pmac() +#endif +static void __init fixup_device_tree(void) +{ + fixup_device_tree_maple(); + fixup_device_tree_pmac(); +} static void __init prom_find_boot_cpu(void) { |