ASoC: Support FLL lock interrupt on WM8962

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index 500011eb8b2b..d6b78b2a10df 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -58,6 +58,7 @@ struct wm8962_priv {
         int bclk;  /* Desired BCLK */
         int lrclk;
 
+        struct completion fll_lock;
         int fll_src;
         int fll_fref;
         int fll_fout;
@@ -3178,6 +3179,7 @@ static int wm8962_set_fll(struct snd_soc_dai *dai, int fll_id, int source,
         struct snd_soc_codec *codec = dai->codec;
         struct wm8962_priv *wm8962 = snd_soc_codec_get_drvdata(codec);
         struct _fll_div fll_div;
+        unsigned long timeout;
         int ret;
         int fll1 = snd_soc_read(codec, WM8962_FLL_CONTROL_1) & WM8962_FLL_ENA;
 
@@ -3244,6 +3246,11 @@ static int wm8962_set_fll(struct snd_soc_dai *dai, int fll_id, int source,
 
         dev_dbg(codec->dev, "FLL configured for %dHz->%dHz\n", Fref, Fout);
 
+        /* This should be a massive overestimate */
+        timeout = msecs_to_jiffies(1);
+
+        wait_for_completion_timeout(&wm8962->fll_lock, timeout);
+
         wm8962->fll_fref = Fref;
         wm8962->fll_fout = Fout;
         wm8962->fll_src = source;
@@ -3340,6 +3347,11 @@ static irqreturn_t wm8962_irq(int irq, void *data)
         active = snd_soc_read(codec, WM8962_INTERRUPT_STATUS_2);
         active &= ~mask;
 
+        if (active & WM8962_FLL_LOCK_EINT) {
+                dev_dbg(codec->dev, "FLL locked\n");
+                complete(&wm8962->fll_lock);
+        }
+
         if (active & WM8962_FIFOS_ERR_EINT)
                 dev_err(codec->dev, "FIFO error\n");
 
@@ -3712,6 +3724,7 @@ static int wm8962_probe(struct snd_soc_codec *codec)
 
         wm8962->codec = codec;
         INIT_DELAYED_WORK(&wm8962->mic_work, wm8962_mic_work);
+        init_completion(&wm8962->fll_lock);
 
         codec->cache_sync = 1;
         codec->dapm.idle_bias_off = 1;
@@ -3868,9 +3881,10 @@ static int wm8962_probe(struct snd_soc_codec *codec)
                                 i2c->irq, ret);
                         /* Non-fatal */
                 } else {
-                        /* Enable error reporting IRQs by default */
+                        /* Enable some IRQs by default */
                         snd_soc_update_bits(codec,
                                             WM8962_INTERRUPT_STATUS_2_MASK,
+                                            WM8962_FLL_LOCK_EINT |
                                             WM8962_TEMP_SHUT_EINT |
                                             WM8962_FIFOS_ERR_EINT, 0);
                 }