drivers/rtc/rtc-s3c.c: fix initialization failure without rtc source clock

Fix unconditional initialization failure on non-exynos3250 SoCs.

Commit df9e26d093d3 ("rtc: s3c: add support for RTC of Exynos3250 SoC")
introduced rtc source clock support, but also added initialization
failure on SoCs, which doesn't need such clock.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index a6b1252..8060722 100644 (file)
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -535,13 +535,15 @@ static int s3c_rtc_probe(struct platform_device *pdev)
        }
        clk_prepare_enable(info->rtc_clk);
 
-       info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
-       if (IS_ERR(info->rtc_src_clk)) {
-               dev_err(&pdev->dev, "failed to find rtc source clock\n");
-               return PTR_ERR(info->rtc_src_clk);
+       if (info->data->needs_src_clk) {
+               info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src");
+               if (IS_ERR(info->rtc_src_clk)) {
+                       dev_err(&pdev->dev,
+                               "failed to find rtc source clock\n");
+                       return PTR_ERR(info->rtc_src_clk);
+               }
+               clk_prepare_enable(info->rtc_src_clk);
        }
-       clk_prepare_enable(info->rtc_src_clk);
-
 
        /* check to see if everything is setup correctly */
        if (info->data->enable)