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Commit fde39a6b authored by Mark Brown's avatar Mark Brown
Browse files

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: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 5f6ac59f

sound/soc/codecs/wm1250-ev1.c

+43 −0
Original line number Diff line number Diff line
@@ -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 = {