[POWERPC] Fix booting on Momentum "Apache" board (a Maple derivative)

This extends the maple device-tree workarounds to work on the
Apache board as well, and extends the maple platform probing code
to recognize the Apache board.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 15 insertions, 5 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 1e95a9f8cda1..ebd501a59abd 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1990,12 +1990,22 @@ static void __init flatten_device_tree(void)
 static void __init fixup_device_tree_maple(void)
 {
         phandle isa;
+        u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
         u32 isa_ranges[6];
-
-        isa = call_prom("finddevice", 1, 1, ADDR("/ht@0/isa@4"));
+        char *name;
+
+        name = "/ht@0/isa@4";
+        isa = call_prom("finddevice", 1, 1, ADDR(name));
+        if (!PHANDLE_VALID(isa)) {
+                name = "/ht@0/isa@6";
+                isa = call_prom("finddevice", 1, 1, ADDR(name));
+                rloc = 0x01003000; /* IO space; PCI device = 6 */
+        }
         if (!PHANDLE_VALID(isa))
                 return;
 
+        if (prom_getproplen(isa, "ranges") != 12)
+                return;
         if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
                 == PROM_ERROR)
                 return;
@@ -2005,15 +2015,15 @@ static void __init fixup_device_tree_maple(void)
                 isa_ranges[2] != 0x00010000)
                 return;
 
-        prom_printf("fixing up bogus ISA range on Maple...\n");
+        prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
 
         isa_ranges[0] = 0x1;
         isa_ranges[1] = 0x0;
-        isa_ranges[2] = 0x01002000; /* IO space; PCI device = 4 */
+        isa_ranges[2] = rloc;
         isa_ranges[3] = 0x0;
         isa_ranges[4] = 0x0;
         isa_ranges[5] = 0x00010000;
-        prom_setprop(isa, "/ht@0/isa@4", "ranges",
+        prom_setprop(isa, name, "ranges",
                         isa_ranges, sizeof(isa_ranges));
 }
 #else