[ARM] 3590/1: AT91RM9200 Platform devices support

Patch from Andrew Victor

This patch includes the structures and exported functions required for
the platform-device support (added in patch 3585/1).

Also adds the arch_identify() function for run-time detection of which
AT91 processor the code is running on.  [Original patch from Ivan
Kokshaysky]

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/asm-arm/arch-at91rm9200/system.h b/include/asm-arm/arch-at91rm9200/system.h
index 29c42655f05c..945e66507a78 100644
--- a/include/asm-arm/arch-at91rm9200/system.h
+++ b/include/asm-arm/arch-at91rm9200/system.h
@@ -48,4 +48,12 @@ static inline void arch_reset(char mode)
         at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
 }
 
+#define ARCH_ID_AT91RM9200      0x09200080
+#define ARCH_ID_AT91SAM9261     0x019000a0
+
+static inline unsigned long arch_identify(void)
+{
+        return at91_sys_read(AT91_DBGU_CIDR) & (AT91_CIDR_EPROC | AT91_CIDR_ARCH);
+}
+
 #endif