[ARM] MXC: add cpu_is_ macros

We had hardcoded cpu_is_ macros for mxc architectures till now. As we
want to run the same kernel on i.MX31 and i.MX35 this patch adds cpu_is_
macros which expand to 0 or 1 if only one architecture is compiled in and
only check for the cpu type if more than one architecture is compiled
in.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mx3/clock.c

@@ -1077,6 +1077,8 @@ int __init mx31_clocks_init(unsigned long fref)
 	u32 reg;
 	struct clk **clkp;
 
+	mxc_set_cpu_type(MXC_CPU_MX31);
+
 	ckih_rate = fref;
 
 	for (clkp = mxc_clks; clkp < mxc_clks + ARRAY_SIZE(mxc_clks); clkp++)

arch/arm/plat-mxc/Makefile

@@ -3,7 +3,7 @@
 #
 
 # Common support
-obj-y := irq.o clock.o gpio.o time.o devices.o
+obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o
 
 obj-$(CONFIG_ARCH_MX1) += iomux-mx1-mx2.o dma-mx1-mx2.o
 obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o

arch/arm/plat-mxc/cpu.c

+
+#include <linux/module.h>
+
+unsigned int __mxc_cpu_type;
+EXPORT_SYMBOL(__mxc_cpu_type);
+
+void mxc_set_cpu_type(unsigned int type)
+{
+	__mxc_cpu_type = type;
+}
+

arch/arm/plat-mxc/include/mach/common.h

@@ -23,5 +23,6 @@ extern int mx27_clocks_init(unsigned long fref);
 extern int mx31_clocks_init(unsigned long fref);
 extern int mxc_register_gpios(void);
 extern int mxc_register_device(struct platform_device *pdev, void *data);
+extern void mxc_set_cpu_type(unsigned int type);
 
 #endif

arch/arm/plat-mxc/include/mach/mx21.h

@@ -54,9 +54,6 @@
 
 #define IRAM_BASE_ADDR          0xFFFFE800	/* internal ram */
 
-/* this is an i.MX21 CPU */
-#define cpu_is_mx21()		(1)
-
 /* this CPU supports up to 192 GPIOs (don't forget the baseboard!) */
 #define ARCH_NR_GPIOS		(6*32 + 16)
 

arch/arm/plat-mxc/include/mach/mx27.h

@@ -120,9 +120,6 @@ extern int mx27_revision(void);
 
 /* Mandatory defines used globally */
 
-/* this is an i.MX27 CPU */
-#define cpu_is_mx27()		(1)
-
 /* this CPU supports up to 192 GPIOs (don't forget the baseboard!) */
 #define ARCH_NR_GPIOS		(192 + 16)
 

arch/arm/plat-mxc/include/mach/mxc.h

@@ -24,21 +24,74 @@
 #error "Do not include directly."
 #endif
 
-/* clean up all things that are not used */
-#ifndef CONFIG_ARCH_MX3
-# define cpu_is_mx31() (0)
+#define MXC_CPU_MX1		1
+#define MXC_CPU_MX21		21
+#define MXC_CPU_MX27		27
+#define MXC_CPU_MX31		31
+#define MXC_CPU_MX35		35
+
+#ifndef __ASSEMBLY__
+extern unsigned int __mxc_cpu_type;
+#endif
+
+#ifdef CONFIG_ARCH_MX1
+# ifdef mxc_cpu_type
+#  undef mxc_cpu_type
+#  define mxc_cpu_type __mxc_cpu_type
+# else
+#  define mxc_cpu_type MXC_CPU_MX1
+# endif
+# define cpu_is_mx1()		(mxc_cpu_type == MXC_CPU_MX1)
+#else
+# define cpu_is_mx1()		(0)
 #endif
 
-#ifndef CONFIG_MACH_MX21
-# define cpu_is_mx21() (0)
+#ifdef CONFIG_MACH_MX21
+# ifdef mxc_cpu_type
+#  undef mxc_cpu_type
+#  define mxc_cpu_type __mxc_cpu_type
+# else
+#  define mxc_cpu_type MXC_CPU_MX21
+# endif
+# define cpu_is_mx21()		(mxc_cpu_type == MXC_CPU_MX21)
+#else
+# define cpu_is_mx21()		(0)
 #endif
 
-#ifndef CONFIG_MACH_MX27
-# define cpu_is_mx27() (0)
+#ifdef CONFIG_MACH_MX27
+# ifdef mxc_cpu_type
+#  undef mxc_cpu_type
+#  define mxc_cpu_type __mxc_cpu_type
+# else
+#  define mxc_cpu_type MXC_CPU_MX27
+# endif
+# define cpu_is_mx27()		(mxc_cpu_type == MXC_CPU_MX27)
+#else
+# define cpu_is_mx27()		(0)
 #endif
 
-#ifndef CONFIG_MACH_MX21
-# define cpu_is_mx21() (0)
+#ifdef CONFIG_ARCH_MX31
+# ifdef mxc_cpu_type
+#  undef mxc_cpu_type
+#  define mxc_cpu_type __mxc_cpu_type
+# else
+#  define mxc_cpu_type MXC_CPU_MX31
+# endif
+# define cpu_is_mx31()		(mxc_cpu_type == MXC_CPU_MX31)
+#else
+# define cpu_is_mx31()		(0)
+#endif
+
+#ifdef CONFIG_ARCH_MX35
+# ifdef mxc_cpu_type
+#  undef mxc_cpu_type
+#  define mxc_cpu_type __mxc_cpu_type
+# else
+#  define mxc_cpu_type MXC_CPU_MX35
+# endif
+# define cpu_is_mx35()		(mxc_cpu_type == MXC_CPU_MX35)
+#else
+# define cpu_is_mx35()		(0)
 #endif
 
 #if defined(CONFIG_ARCH_MX3) || defined(CONFIG_ARCH_MX2)
@@ -47,4 +100,7 @@
 #define CSCR_A(n) (IO_ADDRESS(WEIM_BASE_ADDR) + n * 0x10 + 0x8)
 #endif
 
+#define cpu_is_mx3()	(cpu_is_mx31() || cpu_is_mx35())
+#define cpu_is_mx2()	(cpu_is_mx21() || cpu_is_mx27())
+
 #endif /*  __ASM_ARCH_MXC_H__ */