sh: heartbeat: Support access size specification via resource flags.

This permits the resource access size to be handed off through the
resource flags, which saves platforms from having to establish
platform data only to specify the register width.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/drivers/heartbeat.c

@@ -1,7 +1,7 @@
 /*
  * Generic heartbeat driver for regular LED banks
  *
- * Copyright (C) 2007  Paul Mundt
+ * Copyright (C) 2007 - 2010  Paul Mundt
  *
  * Most SH reference boards include a number of individual LEDs that can
  * be independently controlled (either via a pre-defined hardware
@@ -27,7 +27,7 @@
 #include <asm/heartbeat.h>
 
 #define DRV_NAME "heartbeat"
-#define DRV_VERSION "0.1.1"
+#define DRV_VERSION "0.1.2"
 
 static unsigned char default_bit_pos[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
 
@@ -98,7 +98,7 @@ static int heartbeat_drv_probe(struct platform_device *pdev)
 			return -ENOMEM;
 	}
 
-	hd->base = ioremap_nocache(res->start, res->end - res->start + 1);
+	hd->base = ioremap_nocache(res->start, resource_size(res));
 	if (unlikely(!hd->base)) {
 		dev_err(&pdev->dev, "ioremap failed\n");
 
@@ -117,8 +117,20 @@ static int heartbeat_drv_probe(struct platform_device *pdev)
 	for (i = 0; i < hd->nr_bits; i++)
 		hd->mask |= (1 << hd->bit_pos[i]);
 
-	if (!hd->regsize)
-		hd->regsize = 8;	/* default access size */
+	if (!hd->regsize) {
+		switch (res->flags & IORESOURCE_MEM_TYPE_MASK) {
+		case IORESOURCE_MEM_32BIT:
+			hd->regsize = 32;
+			break;
+		case IORESOURCE_MEM_16BIT:
+			hd->regsize = 16;
+			break;
+		case IORESOURCE_MEM_8BIT:
+		default:
+			hd->regsize = 8;
+			break;
+		}
+	}
 
 	setup_timer(&hd->timer, heartbeat_timer, (unsigned long)hd);
 	platform_set_drvdata(pdev, hd);