[ARM] 3226/1: IXP4xx runtime expansion bus window size configuration

Patch from Deepak Saxena

The expansion bus on the IXP46x NPU can be configured for either 32MiB or
16MiB windows and changing the configuration causes the base address for
each chip select for each region to change. Because of this, we cannot
hardcode the physical base as we currently do. This patch checks the
expansion bus configuration registers at runtime to determine the
appropriate window size. Note that this requires that the bootloader
already configured the device sizes appropriately, but I feel that is
valid assumption to make as the bootloader must configure and access
the flash window, the output display (LCD, LEDs, etc) window, and
other expansion bus devices.

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 0 insertions, 3 deletions

diff --git a/include/asm-arm/arch-ixp4xx/nas100d.h b/include/asm-arm/arch-ixp4xx/nas100d.h
index ce7a86a98fc2..51ac0180427c 100644
--- a/include/asm-arm/arch-ixp4xx/nas100d.h
+++ b/include/asm-arm/arch-ixp4xx/nas100d.h
@@ -19,9 +19,6 @@
 #error "Do not include this directly, instead #include <asm/hardware.h>"
 #endif
 
-#define NAS100D_FLASH_BASE      IXP4XX_EXP_BUS_CS0_BASE_PHYS
-#define NAS100D_FLASH_SIZE      IXP4XX_EXP_BUS_CSX_REGION_SIZE
-
 #define NAS100D_SDA_PIN         6
 #define NAS100D_SCL_PIN         5