From 68ccd66846569e2498eca60bddb575d10a3b7bff Mon Sep 17 00:00:00 2001
From: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Date: Fri, 15 Jun 2012 16:35:28 +0100
Subject: [PATCH] --- yaml --- r: 316163 b: refs/heads/master c:
 4be77a530be1ea62574f31c20dd9848e7e2ab0f6 h: refs/heads/master i:   316161:
 58144eda7171005822d9b571775a15b8ca8dbf1d   316159:
 0ccb1b8d7b36611d9b57907652eb5495895b17c9 v: v3

---
 [refs]                      |  2 +-
 trunk/include/sound/pcm.h   |  1 +
 trunk/sound/core/pcm_misc.c | 18 ++++++++++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 63130dddb62e..2c2f4bf1f4b4 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 989b01385fa3cc4eaa488068a0868ae4de5198a9
+refs/heads/master: 4be77a530be1ea62574f31c20dd9848e7e2ab0f6
diff --git a/trunk/include/sound/pcm.h b/trunk/include/sound/pcm.h
index 0d1112815be3..68372bc1e11b 100644
--- a/trunk/include/sound/pcm.h
+++ b/trunk/include/sound/pcm.h
@@ -893,6 +893,7 @@ extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
 
 int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
 unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
+unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
 
 static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
 					      struct snd_dma_buffer *bufp)
diff --git a/trunk/sound/core/pcm_misc.c b/trunk/sound/core/pcm_misc.c
index 9c9eff9afbac..d4fc1bfbe457 100644
--- a/trunk/sound/core/pcm_misc.c
+++ b/trunk/sound/core/pcm_misc.c
@@ -488,3 +488,21 @@ unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate)
 	return SNDRV_PCM_RATE_KNOT;
 }
 EXPORT_SYMBOL(snd_pcm_rate_to_rate_bit);
+
+/**
+ * snd_pcm_rate_bit_to_rate - converts SNDRV_PCM_RATE_xxx bit to sample rate
+ * @rate_bit: the rate bit to convert
+ *
+ * Returns the sample rate that corresponds to the given SNDRV_PCM_RATE_xxx flag
+ * or 0 for an unknown rate bit
+ */
+unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit)
+{
+	unsigned int i;
+
+	for (i = 0; i < snd_pcm_known_rates.count; i++)
+		if ((1u << i) == rate_bit)
+			return snd_pcm_known_rates.list[i];
+	return 0;
+}
+EXPORT_SYMBOL(snd_pcm_rate_bit_to_rate);