rtc: at91sam9: replace devm_ioremap by devm_ioremap_resource

Replace devm_ioremap calls by devm_ioremap_resource which already check
resource consistency (resource != NULL) and print an error in case of
failure.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Johan Hovold <johan@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 10 insertions, 19 deletions

diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 74a9ca0bbeb4..38a26931b659 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -306,18 +306,11 @@ static const struct rtc_class_ops at91_rtc_ops = {
  */
 static int at91_rtc_probe(struct platform_device *pdev)
 {
-        struct resource *r, *r_gpbr;
+        struct resource *r;
         struct sam9_rtc *rtc;
         int             ret, irq;
         u32             mr;
 
-        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        r_gpbr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-        if (!r || !r_gpbr) {
-                dev_err(&pdev->dev, "need 2 ressources\n");
-                return -ENODEV;
-        }
-
         irq = platform_get_irq(pdev, 0);
         if (irq < 0) {
                 dev_err(&pdev->dev, "failed to get interrupt resource\n");
@@ -335,18 +328,16 @@ static int at91_rtc_probe(struct platform_device *pdev)
                 device_init_wakeup(&pdev->dev, 1);
 
         platform_set_drvdata(pdev, rtc);
-        rtc->rtt = devm_ioremap(&pdev->dev, r->start, resource_size(r));
-        if (!rtc->rtt) {
-                dev_err(&pdev->dev, "failed to map registers, aborting.\n");
-                return -ENOMEM;
-        }
 
-        rtc->gpbr = devm_ioremap(&pdev->dev, r_gpbr->start,
-                                resource_size(r_gpbr));
-        if (!rtc->gpbr) {
-                dev_err(&pdev->dev, "failed to map gpbr registers, aborting.\n");
-                return -ENOMEM;
-        }
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        rtc->rtt = devm_ioremap_resource(&pdev->dev, r);
+        if (IS_ERR(rtc->rtt))
+                return PTR_ERR(rtc->rtt);
+
+        r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+        rtc->gpbr = devm_ioremap_resource(&pdev->dev, r);
+        if (IS_ERR(rtc->gpbr))
+                return PTR_ERR(rtc->rtt);
 
         mr = rtt_readl(rtc, MR);