ASoC: wm1250-ev1: Support sample rate configuration

The Springbank module can support a range of sample rates, selected at
runtime via GPIO configuration. Allow these to be configured at runtime.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/wm1250-ev1.c b/sound/soc/codecs/wm1250-ev1.c
index 0766b5fabae7a0fa105e3728ba4bee1fd55265df..e0b51e9f8b121c8a146e9582665cc413a94b7ae1 100644 (file)
--- a/sound/soc/codecs/wm1250-ev1.c
+++ b/sound/soc/codecs/wm1250-ev1.c
@@ -79,6 +79,48 @@ static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
        { "WM1250 Output", NULL, "DAC" },
 };
 
+static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
+                               struct snd_pcm_hw_params *params,
+                               struct snd_soc_dai *dai)
+{
+       struct wm1250_priv *wm1250 = snd_soc_codec_get_drvdata(dai->codec);
+
+       switch (params_rate(params)) {
+       case 8000:
+               gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
+                              1);
+               gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
+                              1);
+               break;
+       case 16000:
+               gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
+                              0);
+               gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
+                              1);
+               break;
+       case 32000:
+               gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
+                              1);
+               gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
+                              0);
+               break;
+       case 64000:
+               gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
+                              0);
+               gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
+                              0);
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static const struct snd_soc_dai_ops wm1250_ev1_ops = {
+       .hw_params = wm1250_ev1_hw_params,
+};
+
 static struct snd_soc_dai_driver wm1250_ev1_dai = {
        .name = "wm1250-ev1",
        .playback = {
@@ -95,6 +137,7 @@ static struct snd_soc_dai_driver wm1250_ev1_dai = {
                .rates = SNDRV_PCM_RATE_8000,
                .formats = SNDRV_PCM_FMTBIT_S16_LE,
        },
+       .ops = &wm1250_ev1_ops,
 };
 
 static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {