[ARM] ecard: add ecardm_iomap() / ecardm_iounmap()

Add devres ecardm_iomap() and ecardm_iounmap() for Acorn expansion
cards.  Convert all expansion card drivers to use them.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 18 insertions, 1 deletions

diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
index 65f1398723a4..f56d48c451ea 100644
--- a/arch/arm/kernel/ecard.c
+++ b/arch/arm/kernel/ecard.c
@@ -41,11 +41,11 @@
 #include <linux/init.h>
 #include <linux/mutex.h>
 #include <linux/kthread.h>
+#include <linux/io.h>
 
 #include <asm/dma.h>
 #include <asm/ecard.h>
 #include <asm/hardware.h>
-#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/mmu_context.h>
 #include <asm/mach/irq.h>
@@ -966,6 +966,23 @@ void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *op
 }
 EXPORT_SYMBOL(ecard_setirq);
 
+void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res,
+                           unsigned long offset, unsigned long maxsize)
+{
+        unsigned long start = ecard_resource_start(ec, res);
+        unsigned long end = ecard_resource_end(ec, res);
+
+        if (offset > (end - start))
+                return NULL;
+
+        start += offset;
+        if (maxsize && end - start > maxsize)
+                end = start + maxsize;
+        
+        return devm_ioremap(&ec->dev, start, end - start);
+}
+EXPORT_SYMBOL(ecardm_iomap);
+
 /*
  * Probe for an expansion card.
  *