ARM: DaVinci: Add framework for run-time handling for DaVinci CPU family.

Add cpu_is* functions to handle various TI DaVinci based CPUs.
Signed-off-by: Steve Chen <schen@mvista.com>
Signed-off-by: Kevin Hilman <khilman@mvista.com>

arch/arm/mach-davinci/id.c

@@ -20,6 +20,10 @@
 
 #define DAVINCI_DEV_ID		0x01c40028
 
+#define DAVINCI_DM6443_CPU_ID	0x64430000
+#define DAVINCI_DM6467_CPU_ID	0x64670000
+#define DAVINCI_DM350_CPU_ID	0x03500000
+
 struct davinci_id {
 	u16	jtag_id;	/* Device Part No. (Unique JTAG id)*/
 	u8	dev_rev;	/* Processor revision */
@@ -29,7 +33,14 @@ struct davinci_id {
 
 /* Register values to detect the DaVinci version */
 static struct davinci_id davinci_ids[] __initdata = {
-	{ .jtag_id = 0xb700, .dev_rev = 0x2, .mfg_jtag_id = 0x017, .type = 0x64430000},
+	{ .jtag_id = 0xb700, .dev_rev = 0x2, .mfg_jtag_id = 0x017, 
+	  .type = DAVINCI_DM6443_CPU_ID }, /* DaVinci */
+
+	{ .jtag_id = 0xb770, .dev_rev = 0x0, .mfg_jtag_id = 0x017, 
+	  .type = DAVINCI_DM6467_CPU_ID }, /* DaVinci HD */
+
+	{ .jtag_id = 0xb73b, .dev_rev = 0x0, .mfg_jtag_id = 0x00f, 
+	  .type = DAVINCI_DM350_CPU_ID },
 };
 
 /*

include/asm-arm/arch-davinci/cpu.h

+/*
+ * linux/include/asm-arm/arch-davinci/cpu.h
+ *
+ * Davinci cpu type detection
+ *
+ * Author: Steve Chen <schen@mvista.com>
+ *
+ * 2007 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#ifndef _ASM_ARCH_CPU_H
+#define _ASM_ARCH_CPU_H
+
+extern unsigned int system_rev;
+
+#define GET_DAVINCI_CPU_TYPE	((system_rev >> 16) & 0xffff)
+
+#define IS_DAVINCI_CPU(type, id)			\
+static inline int cpu_is_davinci_dm ##type (void)	\
+{							\
+        return (GET_DAVINCI_CPU_TYPE == (id)) ? 1 : 0;	\
+}
+
+/* following generates the cpu_is_davinci_dmxxx */
+IS_DAVINCI_CPU(6443, 0x6443)	/* cpu_is_davinci_dm6443() */
+IS_DAVINCI_CPU(6467, 0x6467)	/* cpu_is_davinci_dm6467() */
+IS_DAVINCI_CPU(350, 0x350)	/* cpu_is_davinci_dm350() */
+
+#endif