[PATCH v2 2/2] ASoC: kirkwood: fix loss of external clock at probe time

[PATCH v2 2/2] ASoC: kirkwood: fix loss of external clock at probe time

[Jean-Francois Moine]

At probe time, when the clock driver is not yet initialized, the
external clock of the kirkwood sound device will not be usable.

This patch fixes this problem defering the device probe.

Signed-off-by: Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
---
 sound/soc/kirkwood/kirkwood-i2s.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sound/soc/kirkwood/kirkwood-i2s.c b/sound/soc/kirkwood/kirkwood-i2s.c
index 0f3d73d..14f32d9 100644
--- a/sound/soc/kirkwood/kirkwood-i2s.c
+++ b/sound/soc/kirkwood/kirkwood-i2s.c
@@ -496,7 +496,10 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
 		return err;
 
 	priv->extclk = devm_clk_get(&pdev->dev, "extclk");
-	if (!IS_ERR(priv->extclk)) {
+	if (IS_ERR(priv->extclk)) {
+		if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+	} else {
 		if (priv->extclk == priv->clk) {
 			devm_clk_put(&pdev->dev, priv->extclk);
 			priv->extclk = ERR_PTR(-EINVAL);


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Re: [PATCH v2 2/2] ASoC: kirkwood: fix loss of external clock at probe time

[Mark Brown]

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On Sat, Sep 21, 2013 at 12:00:36PM +0200, Jean-Francois Moine wrote:
> At probe time, when the clock driver is not yet initialized, the
> external clock of the kirkwood sound device will not be usable.
> 
> This patch fixes this problem defering the device probe.

Applied, thanks.  It won't do anything without a version of patch 1 but
there's no build time dependency and it seems like we should get a fix
into the core for the unspecified vs unregistered problem.

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