[POWERPC] 85xx: SBC8548 - Add flash support and HW Rev reporting

The following adds local bus, flash and MTD partition nodes for
sbc8548. As well, a compatible field for the soc node, so that
of_platform_bus_probe() will pick it up.

Something that is provided through this newly added epld node
is the Hardware Revision which is now being utilized.

Signed-off-by: Jeremy McNicoll <jeremy.mcnicoll@windriver.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 29 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/85xx/sbc8548.c b/arch/powerpc/platforms/85xx/sbc8548.c
index 488facb99fe8..b9246ea0928a 100644
--- a/arch/powerpc/platforms/85xx/sbc8548.c
+++ b/arch/powerpc/platforms/85xx/sbc8548.c
@@ -49,6 +49,8 @@
 #include <sysdev/fsl_soc.h>
 #include <sysdev/fsl_pci.h>
 
+static int sbc_rev;
+
 static void __init sbc8548_pic_init(void)
 {
         struct mpic *mpic;
@@ -79,6 +81,30 @@ static void __init sbc8548_pic_init(void)
         mpic_init(mpic);
 }
 
+/* Extract the HW Rev from the EPLD on the board */
+static int __init sbc8548_hw_rev(void)
+{
+        struct device_node *np;
+        struct resource res;
+        unsigned int *rev;
+        int board_rev = 0;
+
+        np = of_find_compatible_node(NULL, NULL, "hw-rev");
+        if (np == NULL) {
+                printk("No HW-REV found in DTB.\n");
+                return -ENODEV;
+        }
+
+        of_address_to_resource(np, 0, &res);
+        of_node_put(np);
+
+        rev = ioremap(res.start,sizeof(unsigned int));
+        board_rev = (*rev) >> 28;
+        iounmap(rev);
+
+        return board_rev;
+}
+
 /*
  * Setup the architecture
  */
@@ -104,6 +130,7 @@ static void __init sbc8548_setup_arch(void)
                 }
         }
 #endif
+        sbc_rev = sbc8548_hw_rev();
 }
 
 static void sbc8548_show_cpuinfo(struct seq_file *m)
@@ -115,7 +142,7 @@ static void sbc8548_show_cpuinfo(struct seq_file *m)
         svid = mfspr(SPRN_SVR);
 
         seq_printf(m, "Vendor\t\t: Wind River\n");
-        seq_printf(m, "Machine\t\t: SBC8548\n");
+        seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 
@@ -130,6 +157,7 @@ static void sbc8548_show_cpuinfo(struct seq_file *m)
 static struct of_device_id __initdata of_bus_ids[] = {
         { .name = "soc", },
         { .type = "soc", },
+        { .compatible = "simple-bus", },
         {},
 };