[POWERPC] Add device tree fixups for the EFIKA

We make the efika device tree compliant with the defined bindings
(at least compliant enough). This is mostly done by mangling
the device_type and compatible properties, but also adding
some missing bits.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 520ef42f642e..4fb5938ce6d3 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2117,11 +2117,92 @@ static void __init fixup_device_tree_pmac(void)
 #define fixup_device_tree_pmac()
 #endif
 
+#ifdef CONFIG_PPC_EFIKA
+/* The current fw of the Efika has a device tree needs quite a few
+ * fixups to be compliant with the mpc52xx bindings. It's currently
+ * unknown if it will ever be compliant (come on bPlan ...) so we do fixups.
+ * NOTE that we (barely) tolerate it because the EFIKA was out before
+ * the bindings were finished, for any new boards -> RTFM ! */
+
+struct subst_entry {
+        char *path;
+        char *property;
+        void *value;
+        int value_len;
+};
+
+static void __init fixup_device_tree_efika(void)
+{
+        /* Substitution table */
+        #define prop_cstr(x) x, sizeof(x)
+        int prop_sound_irq[3] = { 2, 2, 0 };
+        int prop_bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
+                                     3,4,0, 3,5,0, 3,6,0, 3,7,0,
+                                     3,8,0, 3,9,0, 3,10,0, 3,11,0,
+                                     3,12,0, 3,13,0, 3,14,0, 3,15,0 };
+        struct subst_entry efika_subst_table[] = {
+                { "/",                  "device_type",  prop_cstr("efika") },
+                { "/builtin",           "compatible",   prop_cstr("soc") },
+                { "/builtin/ata",       "compatible",   prop_cstr("mpc5200b-ata\0mpc5200-ata"), },
+                { "/builtin/bestcomm",  "compatible",   prop_cstr("mpc5200b-bestcomm\0mpc5200-bestcomm") },
+                { "/builtin/bestcomm",  "interrupts",   prop_bcomm_irq, sizeof(prop_bcomm_irq) },
+                { "/builtin/ethernet",  "compatible",   prop_cstr("mpc5200b-fec\0mpc5200-fec") },
+                { "/builtin/pic",       "compatible",   prop_cstr("mpc5200b-pic\0mpc5200-pic") },
+                { "/builtin/serial",    "compatible",   prop_cstr("mpc5200b-psc-uart\0mpc5200-psc-uart") },
+                { "/builtin/sound",     "compatible",   prop_cstr("mpc5200b-psc-ac97\0mpc5200-psc-ac97") },
+                { "/builtin/sound",     "interrupts",   prop_sound_irq, sizeof(prop_sound_irq) },
+                { "/builtin/sram",      "compatible",   prop_cstr("mpc5200b-sram\0mpc5200-sram") },
+                { "/builtin/sram",      "device_type",  prop_cstr("sram") },
+                {}
+        };
+        #undef prop_cstr
+
+        /* Vars */
+        u32 node;
+        char prop[64];
+        int rv, i;
+
+        /* Check if we're really running on a EFIKA */
+        node = call_prom("finddevice", 1, 1, ADDR("/"));
+        if (!PHANDLE_VALID(node))
+                return;
+
+        rv = prom_getprop(node, "model", prop, sizeof(prop));
+        if (rv == PROM_ERROR)
+                return;
+        if (strcmp(prop, "EFIKA5K2"))
+                return;
+
+        prom_printf("Applying EFIKA device tree fixups\n");
+
+        /* Process substitution table */
+        for (i=0; efika_subst_table[i].path; i++) {
+                struct subst_entry *se = &efika_subst_table[i];
+
+                node = call_prom("finddevice", 1, 1, ADDR(se->path));
+                if (!PHANDLE_VALID(node)) {
+                        prom_printf("fixup_device_tree_efika: ",
+                                "skipped entry %x - not found\n", i);
+                        continue;
+                }
+
+                rv = prom_setprop(node, se->path, se->property,
+                                        se->value, se->value_len );
+                if (rv == PROM_ERROR)
+                        prom_printf("fixup_device_tree_efika: ",
+                                "skipped entry %x - setprop error\n", i);
+        }
+}
+#else
+#define fixup_device_tree_efika()
+#endif
+
 static void __init fixup_device_tree(void)
 {
         fixup_device_tree_maple();
         fixup_device_tree_chrp();
         fixup_device_tree_pmac();
+        fixup_device_tree_efika();
 }
 
 static void __init prom_find_boot_cpu(void)