1 files changed, 26 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index f48a4b2654dd..3641ba0c16ef 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -246,6 +246,31 @@ void __init omap3_check_revision(void)
         }
 }
 
+void __init omap4_check_revision(void)
+{
+        u32 idcode;
+        u16 hawkeye;
+        u8 rev;
+        char *rev_name = "ES1.0";
+
+        /*
+         * The IC rev detection is done with hawkeye and rev.
+         * Note that rev does not map directly to defined processor
+         * revision numbers as ES1.0 uses value 0.
+         */
+        idcode = read_tap_reg(OMAP_TAP_IDCODE);
+        hawkeye = (idcode >> 12) & 0xffff;
+        rev = (idcode >> 28) & 0xff;
+
+        if ((hawkeye == 0xb852) && (rev == 0x0)) {
+                omap_revision = OMAP4430_REV_ES1_0;
+                pr_info("OMAP%04x %s\n", omap_rev() >> 16, rev_name);
+                return;
+        }
+
+        pr_err("Unknown OMAP4 CPU id\n");
+}
+
 #define OMAP3_SHOW_FEATURE(feat)                \
         if (omap3_has_ ##feat())                \
                 printk(#feat" ");
@@ -336,7 +361,7 @@ void __init omap2_check_revision(void)
                 omap3_check_features();
                 omap3_cpuinfo();
         } else if (cpu_is_omap44xx()) {
-                printk(KERN_INFO "FIXME: CPU revision = OMAP4430\n");
+                omap4_check_revision();
                 return;
         } else {
                 pr_err("OMAP revision unknown, please fix!\n");