pxa: Add code to examine cpu model and revision

Add function which return CPU model and revision which can be used for
cpu detection.
Signed-off-by: NLukasz Dalek <luk0104@gmail.com>

arch/arm/cpu/pxa/cpuinfo.c

@@ -24,9 +24,11 @@
 #include <errno.h>
 #include <linux/compiler.h>
 
-#define	CPU_MASK_PXA_REVID	0x00f
+#define	CPU_MASK_PXA_PRODID	0x000003f0
+#define	CPU_MASK_PXA_REVID	0x0000000f
+
+#define	CPU_MASK_PRODREV	(CPU_MASK_PXA_PRODID | CPU_MASK_PXA_REVID)
 
-#define	CPU_MASK_PXA_PRODID	0x3f0
 #define	CPU_VALUE_PXA25X	0x100
 #define	CPU_VALUE_PXA27X	0x110
 
@@ -51,6 +53,11 @@ int cpu_is_pxa27x(void)
 	return id == CPU_VALUE_PXA27X;
 }
 
+uint32_t pxa_get_cpu_revision(void)
+{
+	return pxa_get_cpuid() & CPU_MASK_PRODREV;
+}
+
 #ifdef	CONFIG_DISPLAY_CPUINFO
 static const char *pxa25x_get_revision(void)
 {

arch/arm/include/asm/arch-pxa/pxa.h

@@ -22,8 +22,21 @@
 #ifndef	__PXA_H__
 #define	__PXA_H__
 
+#define PXA255_A0	0x00000106
+#define PXA250_C0	0x00000105
+#define PXA250_B2	0x00000104
+#define PXA250_B1	0x00000103
+#define PXA250_B0	0x00000102
+#define PXA250_A1	0x00000101
+#define PXA250_A0	0x00000100
+#define PXA210_C0	0x00000125
+#define PXA210_B2	0x00000124
+#define PXA210_B1	0x00000123
+#define PXA210_B0	0x00000122
+
 int cpu_is_pxa25x(void);
 int cpu_is_pxa27x(void);
+uint32_t pxa_get_cpu_revision(void);
 void pxa2xx_dram_init(void);
 
 #endif	/* __PXA_H__ */