[ARM] mv78xx0: distinguish between different chip steppings

During boot, identify which chip stepping we're running on (determined
by looking at the first PCIe unit's device ID and revision registers),
and print a message with the details about what we found.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

1 files changed, 28 insertions, 1 deletions

diff --git a/arch/arm/mach-mv78xx0/common.c b/arch/arm/mach-mv78xx0/common.c
index b0e4e0d8f506..538f8f4d4f23 100644
--- a/arch/arm/mach-mv78xx0/common.c
+++ b/arch/arm/mach-mv78xx0/common.c
@@ -719,6 +719,32 @@ struct sys_timer mv78xx0_timer = {
 /*****************************************************************************
  * General
  ****************************************************************************/
+static char * __init mv78xx0_id(void)
+{
+        u32 dev, rev;
+
+        mv78xx0_pcie_id(&dev, &rev);
+
+        if (dev == MV78X00_Z0_DEV_ID) {
+                if (rev == MV78X00_REV_Z0)
+                        return "MV78X00-Z0";
+                else
+                        return "MV78X00-Rev-Unsupported";
+        } else if (dev == MV78100_DEV_ID) {
+                if (rev == MV78100_REV_A0)
+                        return "MV78100-A0";
+                else
+                        return "MV78100-Rev-Unsupported";
+        } else if (dev == MV78200_DEV_ID) {
+                if (rev == MV78100_REV_A0)
+                        return "MV78200-A0";
+                else
+                        return "MV78200-Rev-Unsupported";
+        } else {
+                return "Device-Unknown";
+        }
+}
+
 static int __init is_l2_writethrough(void)
 {
         return !!(readl(CPU_CONTROL) & L2_WRITETHROUGH);
@@ -737,7 +763,8 @@ void __init mv78xx0_init(void)
         get_pclk_l2clk(hclk, core_index, &pclk, &l2clk);
         tclk = get_tclk();
 
-        printk(KERN_INFO "MV78xx0 core #%d, ", core_index);
+        printk(KERN_INFO "%s ", mv78xx0_id());
+        printk("core #%d, ", core_index);
         printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000);
         printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000);
         printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000);