[ARM] Add platform support for PATA on RiscPC

Add pata_platform device for RiscPC, thereby converting the primary
IDE channel on the machine to PATA.

Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 36 insertions, 1 deletions

diff --git a/arch/arm/mach-rpc/riscpc.c b/arch/arm/mach-rpc/riscpc.c
index 208a2b5dba1b..570cf937e73b 100644
--- a/arch/arm/mach-rpc/riscpc.c
+++ b/arch/arm/mach-rpc/riscpc.c
@@ -17,6 +17,7 @@
 #include <linux/sched.h>
 #include <linux/device.h>
 #include <linux/serial_8250.h>
+#include <linux/pata_platform.h>
 
 #include <asm/elf.h>
 #include <asm/io.h>
@@ -159,11 +160,45 @@ static struct platform_device serial_device = {
         },
 };
 
+static struct pata_platform_info pata_platform_data = {
+        .ioport_shift           = 2,
+};
+
+static struct resource pata_resources[] = {
+        [0] = {
+                .start          = 0x030107c0,
+                .end            = 0x030107df,
+                .flags          = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start          = 0x03010fd8,
+                .end            = 0x03010fdb,
+                .flags          = IORESOURCE_MEM,
+        },
+        [2] = {
+                .start          = IRQ_HARDDISK,
+                .end            = IRQ_HARDDISK,
+                .flags          = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device pata_device = {
+        .name                   = "pata_platform",
+        .id                     = -1,
+        .num_resources          = ARRAY_SIZE(pata_resources),
+        .resource               = pata_resources,
+        .dev                    = {
+                .platform_data  = &pata_platform_data,
+                .coherent_dma_mask = ~0,        /* grumble */
+        },
+};
+
 static struct platform_device *devs[] __initdata = {
         &iomd_device,
         &kbd_device,
         &serial_device,
         &acornfb_device,
+        &pata_device,
 };
 
 static int __init rpc_init(void)
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 7bdbe5a914d0..e0820e8dd1c7 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -545,7 +545,7 @@ config PATA_WINBOND_VLB
 
 config PATA_PLATFORM
         tristate "Generic platform device PATA support"
-        depends on EMBEDDED
+        depends on EMBEDDED || ARCH_RPC
         help
           This option enables support for generic directly connected ATA
           devices commonly found on embedded systems.