Cleaned up AMD Au1200 IDE driver:

- converted to platform bus
- removed pci dependencies
- removed virt_to_phys/phys_to_virt calls
    
System now can root off of a disk.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/Documentation/mips/AU1xxx_IDE.README b/Documentation/mips/AU1xxx_IDE.README
new file mode 100644

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/mips/au1000/pb1200/irqmap.c b/arch/mips/au1000/pb1200/irqmap.c
index 2ec64e78aa01..59e70e5cf325 100644
--- a/arch/mips/au1000/pb1200/irqmap.c
+++ b/arch/mips/au1000/pb1200/irqmap.c
@@ -22,6 +22,7 @@
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
+#include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/irq.h>
@@ -65,7 +66,7 @@ int au1xxx_nr_irqs = sizeof(au1xxx_irq_map)/sizeof(au1xxx_irq_map_t);
  */
 static volatile int pb1200_cascade_en=0;
 
-void pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
 {
         unsigned short bisr = bcsr->int_status;
         int extirq_nr = 0;
@@ -78,6 +79,7 @@ void pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
                 /* Ack and dispatch IRQ */
                 do_IRQ(extirq_nr,regs);
         }
+        return IRQ_RETVAL(1);
 }
 
 inline void pb1200_enable_irq(unsigned int irq_nr)
@@ -97,7 +99,7 @@ static unsigned int pb1200_startup_irq( unsigned int irq_nr )
         if (++pb1200_cascade_en == 1)
         {
                 request_irq(AU1000_GPIO_7, &pb1200_cascade_handler,
-                        0, "Pb1200 Cascade", &pb1200_cascade_handler );
+                        0, "Pb1200 Cascade", (void *)&pb1200_cascade_handler );
 #ifdef CONFIG_MIPS_PB1200
     /* We have a problem with CPLD rev3. Enable a workaround */
         if( ((bcsr->whoami & BCSR_WHOAMI_CPLD)>>4) <= 3)