ASoC: SSM2602: Add sysclk based rate constraints

Not all advertised rates are available for all sysclk frequencies. Add
additional sysclk based rate constraints.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/ssm2602.c b/sound/soc/codecs/ssm2602.c
index 4c94fd2..dcedd74 100644 (file)
--- a/sound/soc/codecs/ssm2602.c
+++ b/sound/soc/codecs/ssm2602.c
@@ -53,6 +53,7 @@ enum ssm2602_type {
 /* codec private data */
 struct ssm2602_priv {
        unsigned int sysclk;
+       struct snd_pcm_hw_constraint_list *sysclk_constraints;
        enum snd_soc_control_type control_type;
        struct snd_pcm_substream *master_substream;
        struct snd_pcm_substream *slave_substream;
@@ -195,6 +196,24 @@ static const struct snd_soc_dapm_route ssm2604_routes[] = {
        {"ADC", NULL, "Line Input"},
 };
 
+static const unsigned int ssm2602_rates_12288000[] = {
+       8000, 32000, 48000, 96000,
+};
+
+static struct snd_pcm_hw_constraint_list ssm2602_constraints_12288000 = {
+       .list = ssm2602_rates_12288000,
+       .count = ARRAY_SIZE(ssm2602_rates_12288000),
+};
+
+static const unsigned int ssm2602_rates_11289600[] = {
+       8000, 44100, 88200,
+};
+
+static struct snd_pcm_hw_constraint_list ssm2602_constraints_11289600 = {
+       .list = ssm2602_rates_11289600,
+       .count = ARRAY_SIZE(ssm2602_rates_11289600),
+};
+
 struct ssm2602_coeff {
        u32 mclk;
        u32 rate;
@@ -320,6 +339,12 @@ static int ssm2602_startup(struct snd_pcm_substream *substream,
        } else
                ssm2602->master_substream = substream;
 
+       if (ssm2602->sysclk_constraints) {
+               snd_pcm_hw_constraint_list(substream->runtime, 0,
+                                  SNDRV_PCM_HW_PARAM_RATE,
+                                  ssm2602->sysclk_constraints);
+       }
+
        return 0;
 }
 
@@ -361,16 +386,21 @@ static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
                        return -EINVAL;
 
                switch (freq) {
-               case 11289600:
-               case 12000000:
                case 12288000:
-               case 16934400:
                case 18432000:
-                       ssm2602->sysclk = freq;
+                       ssm2602->sysclk_constraints = &ssm2602_constraints_12288000;
+                       break;
+               case 11289600:
+               case 16934400:
+                       ssm2602->sysclk_constraints = &ssm2602_constraints_11289600;
+                       break;
+               case 12000000:
+                       ssm2602->sysclk_constraints = NULL;
                        break;
                default:
                        return -EINVAL;
                }
+               ssm2602->sysclk = freq;
        } else {
                unsigned int mask;