Merge master.kernel.org:/home/rmk/linux-2.6-arm

4 files changed, 40 insertions, 1 deletions

diff --git a/arch/arm/mach-ixp2000/Kconfig b/arch/arm/mach-ixp2000/Kconfig
index 9361e05f6fa..ecb58d83478 100644
--- a/arch/arm/mach-ixp2000/Kconfig
+++ b/arch/arm/mach-ixp2000/Kconfig
@@ -54,6 +54,14 @@ config ARCH_IXDP2X01
 	depends on ARCH_IXDP2401 || ARCH_IXDP2801
 	default y	
 
+config IXP2000_SUPPORT_BROKEN_PCI_IO
+	bool "Support broken PCI I/O on older IXP2000s"
+	default y
+	help
+	  Say 'N' here if you only intend to run your kernel on an
+	  IXP2000 B0 or later model and do not need the PCI I/O
+	  byteswap workaround.  Say 'Y' otherwise.
+
 endmenu
 
 endif
diff --git a/arch/arm/mach-ixp2000/enp2611.c b/arch/arm/mach-ixp2000/enp2611.c
index 04b38bcf9aa..f3a291b6a9f 100644
--- a/arch/arm/mach-ixp2000/enp2611.c
+++ b/arch/arm/mach-ixp2000/enp2611.c
@@ -197,8 +197,23 @@ static struct platform_device enp2611_flash = {
 	.resource	= &enp2611_flash_resource,
 };
 
+static struct ixp2000_i2c_pins enp2611_i2c_gpio_pins = {
+	.sda_pin	= ENP2611_GPIO_SDA,
+	.scl_pin	= ENP2611_GPIO_SCL,
+};
+
+static struct platform_device enp2611_i2c_controller = {
+	.name		= "IXP2000-I2C",
+	.id		= 0,
+	.dev		= {
+		.platform_data = &enp2611_i2c_gpio_pins
+	},
+	.num_resources	= 0
+};
+
 static struct platform_device *enp2611_devices[] __initdata = {
-	&enp2611_flash
+	&enp2611_flash,
+	&enp2611_i2c_controller
 };
 
 static void __init enp2611_init_machine(void)
diff --git a/arch/arm/mach-ixp2000/ixdp2x00.c b/arch/arm/mach-ixp2000/ixdp2x00.c
index 21c41fe15b9..5e4380747b5 100644
--- a/arch/arm/mach-ixp2000/ixdp2x00.c
+++ b/arch/arm/mach-ixp2000/ixdp2x00.c
@@ -42,6 +42,9 @@
 #include <asm/mach/flash.h>
 #include <asm/mach/arch.h>
 
+#include <asm/arch/gpio.h>
+
+
 /*************************************************************************
  * IXDP2x00 IRQ Initialization
  *************************************************************************/
diff --git a/arch/arm/mach-ixp2000/pci.c b/arch/arm/mach-ixp2000/pci.c
index 5ff2f2718c5..0788fb2b5c1 100644
--- a/arch/arm/mach-ixp2000/pci.c
+++ b/arch/arm/mach-ixp2000/pci.c
@@ -198,6 +198,19 @@ clear_master_aborts(void)
 void __init
 ixp2000_pci_preinit(void)
 {
+#ifndef CONFIG_IXP2000_SUPPORT_BROKEN_PCI_IO
+	/*
+	 * Configure the PCI unit to properly byteswap I/O transactions,
+	 * and verify that it worked.
+	 */
+	ixp2000_reg_write(IXP2000_PCI_CONTROL,
+			  (*IXP2000_PCI_CONTROL | PCI_CONTROL_IEE));
+
+	if ((*IXP2000_PCI_CONTROL & PCI_CONTROL_IEE) == 0)
+		panic("IXP2000: PCI I/O is broken on this ixp model, and "
+			"the needed workaround has not been configured in");
+#endif
+
 	hook_fault_code(16+6, ixp2000_pci_abort_handler, SIGBUS,
 				"PCI config cycle to non-existent device");
 }