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authorPC Liao <pc.liao@mediatek.com>2016-06-01 20:00:12 +0800
committerMark Brown <broonie@kernel.org>2016-06-02 18:18:25 +0100
commit0c198ed2ba68b6cc728c5aa3c5486d9e5c328ecd (patch)
tree44bc192ed52ac01fcb4eaad3686065ebadaa4380 /sound/soc
parent33d919bd51ad1203e86e3f60e775f463feb1586f (diff)
downloadlinux-0c198ed2ba68b6cc728c5aa3c5486d9e5c328ecd.tar.bz2
ASoC: mediatek: add MCLK source selection
The new machine's MCLK source is from mt8173 which is dynamic from sampling rate*256. This patch provides the selection for device tree. Signed-off-by: PC Liao <pc.liao@mediatek.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/mediatek/mt8173-rt5650.c45
1 files changed, 43 insertions, 2 deletions
diff --git a/sound/soc/mediatek/mt8173-rt5650.c b/sound/soc/mediatek/mt8173-rt5650.c
index a27a6673dbe3..072934b470a8 100644
--- a/sound/soc/mediatek/mt8173-rt5650.c
+++ b/sound/soc/mediatek/mt8173-rt5650.c
@@ -23,6 +23,20 @@
#define MCLK_FOR_CODECS 12288000
+enum mt8173_rt5650_mclk {
+ MT8173_RT5650_MCLK_EXTERNAL = 0,
+ MT8173_RT5650_MCLK_INTERNAL,
+};
+
+struct mt8173_rt5650_platform_data {
+ enum mt8173_rt5650_mclk pll_from;
+ /* 0 = external oscillator; 1 = internal source from mt8173 */
+};
+
+static struct mt8173_rt5650_platform_data mt8173_rt5650_priv = {
+ .pll_from = MT8173_RT5650_MCLK_EXTERNAL,
+};
+
static const struct snd_soc_dapm_widget mt8173_rt5650_widgets[] = {
SND_SOC_DAPM_SPK("Speaker", NULL),
SND_SOC_DAPM_MIC("Int Mic", NULL),
@@ -54,13 +68,29 @@ static int mt8173_rt5650_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ unsigned int mclk_clock;
int i, ret;
+ switch (mt8173_rt5650_priv.pll_from) {
+ case MT8173_RT5650_MCLK_EXTERNAL:
+ /* mclk = 12.288M */
+ mclk_clock = MCLK_FOR_CODECS;
+ break;
+ case MT8173_RT5650_MCLK_INTERNAL:
+ /* mclk = sampling rate*256 */
+ mclk_clock = params_rate(params) * 256;
+ break;
+ default:
+ /* mclk = 12.288M */
+ mclk_clock = MCLK_FOR_CODECS;
+ break;
+ }
+
for (i = 0; i < rtd->num_codecs; i++) {
struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
- /* pll from mclk 12.288M */
- ret = snd_soc_dai_set_pll(codec_dai, 0, 0, MCLK_FOR_CODECS,
+ /* pll from mclk */
+ ret = snd_soc_dai_set_pll(codec_dai, 0, 0, mclk_clock,
params_rate(params) * 512);
if (ret)
return ret;
@@ -243,6 +273,17 @@ static int mt8173_rt5650_dev_probe(struct platform_device *pdev)
mt8173_rt5650_codecs[1].dai_name = codec_capture_dai;
}
+ if (device_property_present(&pdev->dev, "mediatek,mclk")) {
+ ret = device_property_read_u32(&pdev->dev,
+ "mediatek,mclk",
+ &mt8173_rt5650_priv.pll_from);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "%s snd_soc_register_card fail %d\n",
+ __func__, ret);
+ }
+ }
+
card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);