From 51b3b5cabb1d7d6ca12416652e2df2e01eb61fb9 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 3 Jun 2011 17:49:46 +0100 Subject: [PATCH] ASoC: Error out when FLL lock interrupt is not delivered on WM8915 When the FLL locks on the WM8915 an interrupt is generated. For safety error out if we don't get that interrupt when the IRQ output of the WM8915 is hooked up. Since we *really* expect an interrupt but the threaded IRQ handler may take a bit longer than expected to get scheduled also dramatically increase the delay in this case. Signed-off-by: Mark Brown Acked-by: Liam Girdwood --- sound/soc/codecs/wm8915.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/wm8915.c b/sound/soc/codecs/wm8915.c index eecd2c11612..a1d8618f7e2 100644 --- a/sound/soc/codecs/wm8915.c +++ b/sound/soc/codecs/wm8915.c @@ -2009,6 +2009,7 @@ static int wm8915_set_fll(struct snd_soc_codec *codec, int fll_id, int source, unsigned int Fref, unsigned int Fout) { struct wm8915_priv *wm8915 = snd_soc_codec_get_drvdata(codec); + struct i2c_client *i2c = to_i2c_client(codec->dev); struct _fll_div fll_div; unsigned long timeout; int ret, reg; @@ -2095,7 +2096,18 @@ static int wm8915_set_fll(struct snd_soc_codec *codec, int fll_id, int source, else timeout = msecs_to_jiffies(2); - wait_for_completion_timeout(&wm8915->fll_lock, timeout); + /* Allow substantially longer if we've actually got the IRQ */ + if (i2c->irq) + timeout *= 1000; + + ret = wait_for_completion_timeout(&wm8915->fll_lock, timeout); + + if (ret == 0 && i2c->irq) { + dev_err(codec->dev, "Timed out waiting for FLL\n"); + ret = -ETIMEDOUT; + } else { + ret = 0; + } dev_dbg(codec->dev, "FLL configured for %dHz->%dHz\n", Fref, Fout); @@ -2103,7 +2115,7 @@ static int wm8915_set_fll(struct snd_soc_codec *codec, int fll_id, int source, wm8915->fll_fout = Fout; wm8915->fll_src = source; - return 0; + return ret; } #ifdef CONFIG_GPIOLIB -- 2.39.2