Merge branch 'upstream/wm8974' into for-2.6.33
authorMark Brown <broonie@opensource.wolfsonmicro.com>
Wed, 30 Sep 2009 14:48:38 +0000 (15:48 +0100)
committerMark Brown <broonie@opensource.wolfsonmicro.com>
Wed, 30 Sep 2009 14:48:38 +0000 (15:48 +0100)
sound/soc/codecs/wm8974.c

index 93d66e3..eff2933 100644 (file)
@@ -281,36 +281,38 @@ static int wm8974_add_widgets(struct snd_soc_codec *codec)
 }
 
 struct pll_ {
-       unsigned int pre_div:4; /* prescale - 1 */
+       unsigned int pre_div:1;
        unsigned int n:4;
        unsigned int k;
 };
 
-static struct pll_ pll_div;
-
 /* The size in bits of the pll divide multiplied by 10
  * to allow rounding later */
 #define FIXED_PLL_SIZE ((1 << 24) * 10)
 
-static void pll_factors(unsigned int target, unsigned int source)
+static void pll_factors(struct pll_ *pll_div,
+                       unsigned int target, unsigned int source)
 {
        unsigned long long Kpart;
        unsigned int K, Ndiv, Nmod;
 
+       /* There is a fixed divide by 4 in the output path */
+       target *= 4;
+
        Ndiv = target / source;
        if (Ndiv < 6) {
-               source >>= 1;
-               pll_div.pre_div = 1;
+               source /= 2;
+               pll_div->pre_div = 1;
                Ndiv = target / source;
        } else
-               pll_div.pre_div = 0;
+               pll_div->pre_div = 0;
 
        if ((Ndiv < 6) || (Ndiv > 12))
                printk(KERN_WARNING
                        "WM8974 N value %u outwith recommended range!\n",
                        Ndiv);
 
-       pll_div.n = Ndiv;
+       pll_div->n = Ndiv;
        Nmod = target % source;
        Kpart = FIXED_PLL_SIZE * (long long)Nmod;
 
@@ -325,13 +327,14 @@ static void pll_factors(unsigned int target, unsigned int source)
        /* Move down to proper range now rounding is done */
        K /= 10;
 
-       pll_div.k = K;
+       pll_div->k = K;
 }
 
 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
                int source, unsigned int freq_in, unsigned int freq_out)
 {
        struct snd_soc_codec *codec = codec_dai->codec;
+       struct pll_ pll_div;
        u16 reg;
 
        if (freq_in == 0 || freq_out == 0) {
@@ -345,7 +348,7 @@ static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
                return 0;
        }
 
-       pll_factors(freq_out*4, freq_in);
+       pll_factors(&pll_div, freq_out, freq_in);
 
        snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
        snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);