ARM/ixp4xx: Make NEED_MACH_IO_H optional

In order to create a proper PCI driver for the IXP4xx
we need to make the old PCI driver and its reliance
on <mach/io.h> optional.

Create a new Kconfig symbol for the legacy PCI driver
IXP4XX_PCI_LEGACY and only activate NEED_MACH_IO_H
for this driver.

A few files need to be adjusted to explicitly include
the <mach/hardware.h> and <mach/cpu.h> headers that
they previously obtained implicitly using <linux/io.h>
that would include <mach/io.h> and in turn include
these two headers.

This breaks our reliance on the old PCI and indirect
PCI support so we can reimplement a proper purely
DT-based driver in the PCI subsystem.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Krzysztof Halasa <khalasa@piap.pl>
Cc: Zoltan HERPAI <wigyori@uid0.hu>
Cc: Raylynn Knight <rayknight@me.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

6 files changed, 26 insertions, 14 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 24804f11302d..819f0d08401e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -398,7 +398,8 @@ config ARCH_IXP4XX
 	select HAVE_PCI
 	select IXP4XX_IRQ
 	select IXP4XX_TIMER
-	select NEED_MACH_IO_H
+	# With the new PCI driver this is not needed
+	select NEED_MACH_IO_H if PCI_IXP4XX_LEGACY
 	select USB_EHCI_BIG_ENDIAN_DESC
 	select USB_EHCI_BIG_ENDIAN_MMIO
 	help
diff --git a/arch/arm/mach-ixp4xx/Kconfig b/arch/arm/mach-ixp4xx/Kconfig
index 165c184801e1..cabb37232704 100644
--- a/arch/arm/mach-ixp4xx/Kconfig
+++ b/arch/arm/mach-ixp4xx/Kconfig
@@ -20,7 +20,7 @@ config MACH_IXP4XX_OF
 config MACH_NSLU2
 	bool
 	prompt "Linksys NSLU2"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support Linksys's
 	  NSLU2 NAS device. For more information on this platform,
@@ -28,7 +28,7 @@ config MACH_NSLU2
 
 config MACH_AVILA
 	bool "Avila"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the Gateworks
 	  Avila Network Platform. For more information on this platform,
@@ -44,7 +44,7 @@ config MACH_LOFT
 
 config ARCH_ADI_COYOTE
 	bool "Coyote"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the ADI 
 	  Engineering Coyote Gateway Reference Platform. For more
@@ -52,7 +52,7 @@ config ARCH_ADI_COYOTE
 
 config MACH_GATEWAY7001
 	bool "Gateway 7001"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support Gateway's
 	  7001 Access Point. For more information on this platform,
@@ -60,7 +60,7 @@ config MACH_GATEWAY7001
 
 config MACH_WG302V2
 	bool "Netgear WG302 v2 / WAG302 v2"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support Netgear's
 	  WG302 v2 or WAG302 v2 Access Points. For more information
@@ -68,6 +68,7 @@ config MACH_WG302V2
 
 config ARCH_IXDP425
 	bool "IXDP425"
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support Intel's 
 	  IXDP425 Development Platform (Also known as Richfield).  
@@ -75,6 +76,7 @@ config ARCH_IXDP425
 
 config MACH_IXDPG425
 	bool "IXDPG425"
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support Intel's
 	  IXDPG425 Development Platform (Also known as Montajade).
@@ -120,7 +122,7 @@ config ARCH_PRPMC1100
 config MACH_NAS100D
 	bool
 	prompt "NAS100D"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support Iomega's
 	  NAS 100d device. For more information on this platform,
@@ -129,7 +131,7 @@ config MACH_NAS100D
 config MACH_DSMG600
 	bool
 	prompt "D-Link DSM-G600 RevA"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support D-Link's
 	  DSM-G600 RevA device. For more information on this platform,
@@ -143,7 +145,7 @@ config	ARCH_IXDP4XX
 config MACH_FSG
 	bool
 	prompt "Freecom FSG-3"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support Freecom's
 	  FSG-3 device. For more information on this platform,
@@ -152,7 +154,7 @@ config MACH_FSG
 config MACH_ARCOM_VULCAN
 	bool
 	prompt "Arcom/Eurotech Vulcan"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support Arcom's
 	  Vulcan board.
@@ -173,7 +175,7 @@ config CPU_IXP43X
 config MACH_GTWX5715
 	bool "Gemtek WX5715 (Linksys WRV54G)"
 	depends on ARCH_IXP4XX
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 		This board is currently inside the Linksys WRV54G Gateways.
 
@@ -196,7 +198,7 @@ config MACH_DEVIXP
 
 config MACH_MICCPT
 	bool "Omicron MICCPT"
-	select FORCE_PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
 	  Say 'Y' here if you want your kernel to support the MICCPT
 	  board from OMICRON electronics GmbH.
@@ -209,9 +211,16 @@ config MACH_MIC256
 
 comment "IXP4xx Options"
 
+config IXP4XX_PCI_LEGACY
+	bool "IXP4xx legacy PCI driver support"
+	depends on PCI
+	help
+	  Selects legacy PCI driver.
+	  Not recommended for new development.
+
 config IXP4XX_INDIRECT_PCI
 	bool "Use indirect PCI memory access"
-	depends on PCI
+	depends on IXP4XX_PCI_LEGACY
 	help
           IXP4xx provides two methods of accessing PCI memory space:
 
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index 000f672a94c9..431da1b4f6bd 100644
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -32,7 +32,6 @@
 #include <linux/dma-map-ops.h>
 #include <mach/udc.h>
 #include <mach/hardware.h>
-#include <mach/io.h>
 #include <linux/uaccess.h>
 #include <asm/page.h>
 #include <asm/exception.h>
diff --git a/arch/arm/mach-ixp4xx/fsg-setup.c b/arch/arm/mach-ixp4xx/fsg-setup.c
index 507ee3878769..844329c5610d 100644
--- a/arch/arm/mach-ixp4xx/fsg-setup.c
+++ b/arch/arm/mach-ixp4xx/fsg-setup.c
@@ -28,6 +28,7 @@
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/flash.h>
+#include <mach/hardware.h>
 
 #include "irqs.h"
 
diff --git a/arch/arm/mach-ixp4xx/nas100d-setup.c b/arch/arm/mach-ixp4xx/nas100d-setup.c
index 6959ad2e3aec..6133cf01cbe4 100644
--- a/arch/arm/mach-ixp4xx/nas100d-setup.c
+++ b/arch/arm/mach-ixp4xx/nas100d-setup.c
@@ -33,6 +33,7 @@
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/flash.h>
+#include <mach/hardware.h>
 
 #include "irqs.h"
 
diff --git a/arch/arm/mach-ixp4xx/nslu2-setup.c b/arch/arm/mach-ixp4xx/nslu2-setup.c
index a428bb918703..8526a70e401b 100644
--- a/arch/arm/mach-ixp4xx/nslu2-setup.c
+++ b/arch/arm/mach-ixp4xx/nslu2-setup.c
@@ -31,6 +31,7 @@
 #include <asm/mach/arch.h>
 #include <asm/mach/flash.h>
 #include <asm/mach/time.h>
+#include <mach/hardware.h>
 
 #include "irqs.h"