rtc: simplify devm_request_mem_region/devm_ioremap

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / rtc / rtc-lpc32xx.c

diff --git a/drivers/rtc/rtc-lpc32xx.c b/drivers/rtc/rtc-lpc32xx.c
index 8276ae9..bfdbcb8 100644 (file)
--- a/drivers/rtc/rtc-lpc32xx.c
+++ b/drivers/rtc/rtc-lpc32xx.c
@@ -201,16 +201,9 @@ static int lpc32xx_rtc_probe(struct platform_device *pdev)
 {
        struct resource *res;
        struct lpc32xx_rtc *rtc;
-       resource_size_t size;
        int rtcirq;
        u32 tmp;
 
-       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res) {
-               dev_err(&pdev->dev, "Can't get memory resource\n");
-               return -ENOENT;
-       }
-
        rtcirq = platform_get_irq(pdev, 0);
        if (rtcirq < 0 || rtcirq >= NR_IRQS) {
                dev_warn(&pdev->dev, "Can't get interrupt resource\n");
@@ -224,19 +217,10 @@ static int lpc32xx_rtc_probe(struct platform_device *pdev)
        }
        rtc->irq = rtcirq;
 
-       size = resource_size(res);
-
-       if (!devm_request_mem_region(&pdev->dev, res->start, size,
-                                    pdev->name)) {
-               dev_err(&pdev->dev, "RTC registers are not free\n");
-               return -EBUSY;
-       }
-
-       rtc->rtc_base = devm_ioremap(&pdev->dev, res->start, size);
-       if (!rtc->rtc_base) {
-               dev_err(&pdev->dev, "Can't map memory\n");
-               return -ENOMEM;
-       }
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       rtc->rtc_base = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(rtc->rtc_base))
+               return PTR_ERR(rtc->rtc_base);
 
        spin_lock_init(&rtc->lock);