ARM: sa11x0: neponset: provide function to manipulate NCR_0

Rather than having direct register accesses to NCR_0 scattered amongst
the code, provide a function instead.  This contains the necessary
race protection for this platform, ensuring that updates to this
register are safe.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/mach-sa1100/neponset.c b/arch/arm/mach-sa1100/neponset.c
index 6a14d3760ccd..10be07e2bd56 100644
--- a/arch/arm/mach-sa1100/neponset.c
+++ b/arch/arm/mach-sa1100/neponset.c
@@ -20,6 +20,15 @@
 #include <asm/hardware/sa1111.h>
 #include <asm/sizes.h>
 
+void neponset_ncr_frob(unsigned int mask, unsigned int val)
+{
+        unsigned long flags;
+
+        local_irq_save(flags);
+        NCR_0 = (NCR_0 & ~mask) | val;
+        local_irq_restore(flags);
+}
+
 /*
  * Install handler for Neponset IRQ.  Note that we have to loop here
  * since the ETHERNET and USAR IRQs are level based, and we need to