watchdog: davinci: convert to ioremap() + io[read|write]

Remove davinci platform-specific IO accessor macros in favor
of standard ioremap + io[read|write]* functions.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

drivers/watchdog/davinci_wdt.c

@@ -75,9 +75,9 @@ static void wdt_service(void)
 	spin_lock(&io_lock);
 
 	/* put watchdog in service state */
-	davinci_writel(WDKEY_SEQ0, wdt_base + WDTCR);
+	iowrite32(WDKEY_SEQ0, wdt_base + WDTCR);
 	/* put watchdog in active state */
-	davinci_writel(WDKEY_SEQ1, wdt_base + WDTCR);
+	iowrite32(WDKEY_SEQ1, wdt_base + WDTCR);
 
 	spin_unlock(&io_lock);
 }
@@ -90,29 +90,29 @@ static void wdt_enable(void)
 	spin_lock(&io_lock);
 
 	/* disable, internal clock source */
-	davinci_writel(0, wdt_base + TCR);
+	iowrite32(0, wdt_base + TCR);
 	/* reset timer, set mode to 64-bit watchdog, and unreset */
-	davinci_writel(0, wdt_base + TGCR);
+	iowrite32(0, wdt_base + TGCR);
 	tgcr = TIMMODE_64BIT_WDOG | TIM12RS_UNRESET | TIM34RS_UNRESET;
-	davinci_writel(tgcr, wdt_base + TGCR);
+	iowrite32(tgcr, wdt_base + TGCR);
 	/* clear counter regs */
-	davinci_writel(0, wdt_base + TIM12);
-	davinci_writel(0, wdt_base + TIM34);
+	iowrite32(0, wdt_base + TIM12);
+	iowrite32(0, wdt_base + TIM34);
 	/* set timeout period */
 	timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) & 0xffffffff);
-	davinci_writel(timer_margin, wdt_base + PRD12);
+	iowrite32(timer_margin, wdt_base + PRD12);
 	timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) >> 32);
-	davinci_writel(timer_margin, wdt_base + PRD34);
+	iowrite32(timer_margin, wdt_base + PRD34);
 	/* enable run continuously */
-	davinci_writel(ENAMODE12_PERIODIC, wdt_base + TCR);
+	iowrite32(ENAMODE12_PERIODIC, wdt_base + TCR);
 	/* Once the WDT is in pre-active state write to
 	 * TIM12, TIM34, PRD12, PRD34, TCR, TGCR, WDTCR are
 	 * write protected (except for the WDKEY field)
 	 */
 	/* put watchdog in pre-active state */
-	davinci_writel(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
+	iowrite32(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
 	/* put watchdog in active state */
-	davinci_writel(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
+	iowrite32(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
 
 	spin_unlock(&io_lock);
 }
@@ -218,7 +218,12 @@ static int davinci_wdt_probe(struct platform_device *pdev)
 		printk(KERN_INFO MODULE_NAME "failed to get memory region\n");
 		return -ENOENT;
 	}
-	wdt_base = (void __iomem *)(res->start);
+
+	wdt_base = ioremap(res->start, res->end);
+	if (!wdt_base) {
+		printk(KERN_ERR MODULE_NAME "failed to map memory region\n");
+		return -ENOMEM;
+	}
 
 	ret = misc_register(&davinci_wdt_miscdev);
 	if (ret < 0) {
@@ -229,6 +234,7 @@ static int davinci_wdt_probe(struct platform_device *pdev)
 		set_bit(WDT_DEVICE_INITED, &wdt_status);
 	}
 
+	iounmap(wdt_base);
 	return ret;
 }