[ARM] 3487/1: IXP4xx: Support non-PCI systems

Patch from Deepak Saxena

This patch allows for the addition of IXP4xx systems that do not make
use of the PCI interface by moving the CONFIG_PCI symbol selection to
be platform-specific instead of for all of IXP4xx. If at least one machine
with PCI support is built, the PCI code will be compiled in, but when
building !PCI, this will drastically shrink the kernel size.

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

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1dbf6dd..08b7cc9 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -150,8 +150,6 @@ config ARCH_IOP3XX
 
 config ARCH_IXP4XX
        bool "IXP4xx-based"
-       select DMABOUNCE
-       select PCI
        help
          Support for Intel's IXP4XX (XScale) family of processors.
 

diff --git a/arch/arm/mach-ixp4xx/Kconfig b/arch/arm/mach-ixp4xx/Kconfig
index 5bf50a2..2a39f9e 100644 (file)
--- a/arch/arm/mach-ixp4xx/Kconfig
+++ b/arch/arm/mach-ixp4xx/Kconfig
@@ -11,6 +11,7 @@ comment "IXP4xx Platforms"
 config MACH_NSLU2
        bool
        prompt "Linksys NSLU2"
+       select PCI
        help
          Say 'Y' here if you want your kernel to support Linksys's
          NSLU2 NAS device. For more information on this platform,
@@ -18,6 +19,7 @@ config MACH_NSLU2
 
 config ARCH_AVILA
        bool "Avila"
+       select PCI
        help
          Say 'Y' here if you want your kernel to support the Gateworks
          Avila Network Platform. For more information on this platform,
@@ -25,6 +27,7 @@ config ARCH_AVILA
 
 config ARCH_ADI_COYOTE
        bool "Coyote"
+       select PCI
        help
          Say 'Y' here if you want your kernel to support the ADI 
          Engineering Coyote Gateway Reference Platform. For more
@@ -32,6 +35,7 @@ config ARCH_ADI_COYOTE
 
 config ARCH_IXDP425
        bool "IXDP425"
+       select PCI
        help
          Say 'Y' here if you want your kernel to support Intel's 
          IXDP425 Development Platform (Also known as Richfield).  
@@ -39,6 +43,7 @@ config ARCH_IXDP425
 
 config MACH_IXDPG425
        bool "IXDPG425"
+       select PCI
        help
          Say 'Y' here if you want your kernel to support Intel's
          IXDPG425 Development Platform (Also known as Montajade).
@@ -46,6 +51,7 @@ config MACH_IXDPG425
 
 config MACH_IXDP465
        bool "IXDP465"
+       select PCI
        help
          Say 'Y' here if you want your kernel to support Intel's
          IXDP465 Development Platform (Also known as BMP).
@@ -72,6 +78,7 @@ config ARCH_PRPMC1100
 config MACH_NAS100D
        bool
        prompt "NAS100D"
+       select PCI
        help
          Say 'Y' here if you want your kernel to support Iomega's
          NAS 100d device. For more information on this platform,
@@ -96,6 +103,7 @@ config CPU_IXP46X
 config MACH_GTWX5715
        bool "Gemtek WX5715 (Linksys WRV54G)"
        depends on ARCH_IXP4XX
+       select PCI
        help
                This board is currently inside the Linksys WRV54G Gateways.
 
@@ -110,11 +118,16 @@ config MACH_GTWX5715
                "High Speed" UART is n/c (as far as I can tell)
                20 Pin ARM/Xscale JTAG interface on J2
 
-
 comment "IXP4xx Options"
 
+config DMABOUNCE
+       bool
+       default y
+       depends on PCI
+
 config IXP4XX_INDIRECT_PCI
        bool "Use indirect PCI memory access"
+       depends on PCI
        help
           IXP4xx provides two methods of accessing PCI memory space:
 

diff --git a/arch/arm/mach-ixp4xx/Makefile b/arch/arm/mach-ixp4xx/Makefile
index 0471044..5a4aaa0 100644 (file)
--- a/arch/arm/mach-ixp4xx/Makefile
+++ b/arch/arm/mach-ixp4xx/Makefile
@@ -2,8 +2,9 @@
 # Makefile for the linux kernel.
 #
 
-obj-y  += common.o common-pci.o 
+obj-y  += common.o
 
+obj-$(CONFIG_PCI)              += common-pci.o
 obj-$(CONFIG_ARCH_IXDP4XX)     += ixdp425-pci.o ixdp425-setup.o
 obj-$(CONFIG_MACH_IXDPG425)    += ixdpg425-pci.o coyote-setup.o
 obj-$(CONFIG_ARCH_ADI_COYOTE)  += coyote-pci.o coyote-setup.o

diff --git a/include/asm-arm/arch-ixp4xx/io.h b/include/asm-arm/arch-ixp4xx/io.h
index 942b622..b59520e 100644 (file)
--- a/include/asm-arm/arch-ixp4xx/io.h
+++ b/include/asm-arm/arch-ixp4xx/io.h
@@ -260,6 +260,12 @@ out:
 
 #endif
 
+#ifndef CONFIG_PCI
+
+#define        __io(v)         v
+
+#else
+
 /*
  * IXP4xx does not have a transparent cpu -> PCI I/O translation
  * window.  Instead, it has a set of registers that must be tweaked
@@ -578,6 +584,7 @@ __ixp4xx_iowrite32_rep(void __iomem *addr, const void *vaddr, u32 count)
 
 #define        ioport_map(port, nr)            ((void __iomem*)(port + PIO_OFFSET))
 #define        ioport_unmap(addr)
+#endif // !CONFIG_PCI
 
 #endif //  __ASM_ARM_ARCH_IO_H
 

diff --git a/include/asm-arm/arch-ixp4xx/memory.h b/include/asm-arm/arch-ixp4xx/memory.h
index ee211d2..af9667b 100644 (file)
--- a/include/asm-arm/arch-ixp4xx/memory.h
+++ b/include/asm-arm/arch-ixp4xx/memory.h
@@ -14,7 +14,7 @@
  */
 #define PHYS_OFFSET    UL(0x00000000)
 
-#ifndef __ASSEMBLY__
+#if !defined(__ASSEMBLY__) && defined(CONFIG_PCI)
 
 void ixp4xx_adjust_zones(int node, unsigned long *size, unsigned long *holes);