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[PATCH v3] rtc: s3c: Don't print an error on probe deferral

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The clock and source clock looked up by the driver may not be available
just because the clock controller driver was not probed yet so printing
an error in this case is not correct and only adds confusion to users.

However, knowing that a driver's probe was deferred may be useful so it
can be printed as a debug information.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>

---

Changes in v3:
- Change debug messages again as suggested by Joe Perches.

Changes in v2:
- Improve debug messages as suggested by Joe Perches.

 drivers/rtc/rtc-s3c.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index ffb860d18701..d01ad7e8078e 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -501,18 +501,27 @@ static int s3c_rtc_probe(struct platform_device *pdev)
 
 	info->rtc_clk = devm_clk_get(&pdev->dev, "rtc");
 	if (IS_ERR(info->rtc_clk)) {
-		dev_err(&pdev->dev, "failed to find rtc clock\n");
-		return PTR_ERR(info->rtc_clk);
+		ret = PTR_ERR(info->rtc_clk);
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "failed to find rtc clock\n");
+		else
+			dev_dbg(&pdev->dev, "probe deferred due to missing rtc clk\n");
+		return ret;
 	}
 	clk_prepare_enable(info->rtc_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");
+			ret = PTR_ERR(info->rtc_src_clk);
+			if (ret != -EPROBE_DEFER)
+				dev_err(&pdev->dev,
+					"failed to find rtc source clock\n");
+			else
+				dev_dbg(&pdev->dev,
+					"probe deferred due to missing rtc src clk\n");
 			clk_disable_unprepare(info->rtc_clk);
-			return PTR_ERR(info->rtc_src_clk);
+			return ret;
 		}
 		clk_prepare_enable(info->rtc_src_clk);
 	}
-- 
2.5.0

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[PATCH v3] rtc: s3c: Don't print an error on probe deferral Javier Martinez Canillas <javier@osg.samsung.com> - 2016-03-15 02:40 +0100
  Re: [PATCH v3] rtc: s3c: Don't print an error on probe deferral Javier Martinez Canillas <javier@osg.samsung.com> - 2016-03-15 03:00 +0100
    Re: [PATCH v3] rtc: s3c: Don't print an error on probe deferral Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-03-15 03:30 +0100
      Re: [PATCH v3] rtc: s3c: Don't print an error on probe deferral Javier Martinez Canillas <javier@osg.samsung.com> - 2016-03-15 04:00 +0100
  Re: [PATCH v3] rtc: s3c: Don't print an error on probe deferral Krzysztof Kozlowski <k.kozlowski@samsung.com> - 2016-03-15 03:00 +0100

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