arm/imx21: add kbuild support for the Freescale i.MX21

* adds Kconfig variables
* specifies different physical address for i.MX21 because of the
  different memory layouts
* disables support for UART5/UART6 in the i.MX serial driver
  (the i.MX21 doesn't have those modules)

Based on code from "Martin Fuzzey" <mfuzzey@gmail.com>

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/include/mach/memory.h b/arch/arm/plat-mxc/include/mach/memory.h
index 0b808399097f..e0783e619580 100644
--- a/arch/arm/plat-mxc/include/mach/memory.h
+++ b/arch/arm/plat-mxc/include/mach/memory.h
@@ -14,7 +14,12 @@
 #if defined CONFIG_ARCH_MX1
 #define PHYS_OFFSET             UL(0x08000000)
 #elif defined CONFIG_ARCH_MX2
+#ifdef CONFIG_MACH_MX21
+#define PHYS_OFFSET             UL(0xC0000000)
+#endif
+#ifdef CONFIG_MACH_MX27
 #define PHYS_OFFSET             UL(0xA0000000)
+#endif
 #elif defined CONFIG_ARCH_MX3
 #define PHYS_OFFSET             UL(0x80000000)
 #endif
diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h
index f6caab062131..bbd848e004d7 100644
--- a/arch/arm/plat-mxc/include/mach/mxc.h
+++ b/arch/arm/plat-mxc/include/mach/mxc.h
@@ -29,6 +29,10 @@
 # define cpu_is_mx31() (0)
 #endif
 
+#ifndef CONFIG_MACH_MX21
+# define cpu_is_mx21() (0)
+#endif
+
 #ifndef CONFIG_MACH_MX27
 # define cpu_is_mx27() (0)
 #endif