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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>
This commit is contained in:
Mark Brown 2012-04-09 19:40:00 +01:00
parent 5f6ac59f70
commit fde39a6b15
1 changed files with 43 additions and 0 deletions
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43
sound/soc/codecs/wm1250-ev1.c
View File

@ -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 = {