Documentation/devicetree/bindings/sound/pcm186x.txt

Texas Instruments pcm186x DT bindings

This driver supports the I2C.

Required properties on I2C:
 - compatible: "ti, pcm1864"
 - reg: the I2C address


Examples:

&i2c_c {
	status = "okay";
	pinctrl-names="default";
	pinctrl-0=<&c_i2c_master_pin1>;

    	pcm1864_4a: pcm1864_4a@4a {
	    compatible = "ti, pcm1864";
		#sound-dai-cells = <0>;
		slots_mask = <0x0f>;
		reg = <0x4a>;
		status = "okay";
	};
};

Note:
   Because pcm1864 need to use a fixed frequency,
   So we also need to modify pcm config.
Reference is as follows:

diff --git a/sound/soc/amlogic/auge/tdm.c b/sound/soc/amlogic/auge/tdm.c
index d235a8d..a294e1b 100644
--- a/sound/soc/amlogic/auge/tdm.c
+++ b/sound/soc/amlogic/auge/tdm.c
@@ -451,11 +451,12 @@ static int aml_dai_tdm_trigger(struct snd_pcm_substream *substream, int cmd,
 }

 static int pcm_setting_init(struct pcm_setting *setting, unsigned int rate,
-			unsigned int channels)
+			unsigned int channels, unsigned int fixbclk)
 {
 	unsigned int ratio = 0;
 	setting->lrclk = rate;
-	setting->bclk_lrclk_ratio = setting->slots * setting->slot_width;
+
+	setting->bclk_lrclk_ratio = setting->slots * setting->slot_width * fixbclk;
 	setting->bclk = setting->lrclk * setting->bclk_lrclk_ratio;

 	/* calculate mclk */
@@ -534,8 +535,13 @@ static int aml_dai_tdm_hw_params(struct snd_pcm_substream *substream,
 	unsigned int rate = params_rate(params);
 	unsigned int channels = params_channels(params);
 	int ret;
-
-	ret = pcm_setting_init(setting, rate, channels);
+
+	// FOR PCM1864 TDM BCLK NEED 12.288MHz
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		ret = pcm_setting_init(setting, rate, channels, 1);
+	} else {
+		ret = pcm_setting_init(setting, rate, channels, 2);
+	}
 	if (ret)
 		return ret;

diff --git a/sound/soc/amlogic/auge/tdm.c b/sound/soc/amlogic/auge/tdm.c
index a294e1b..a756035 100644
--- a/sound/soc/amlogic/auge/tdm.c
+++ b/sound/soc/amlogic/auge/tdm.c
@@ -455,8 +455,11 @@ static int pcm_setting_init(struct pcm_setting *setting, unsigned int rate,
 {
 	unsigned int ratio = 0;
 	setting->lrclk = rate;
-
-	setting->bclk_lrclk_ratio = setting->slots * setting->slot_width * fixbclk;
+
+	if (fixbclk == 2)
+		setting->bclk_lrclk_ratio = setting->slots * 32 * fixbclk;
+	else
+		setting->bclk_lrclk_ratio = setting->slots * setting->slot_width * fixbclk;
 	setting->bclk = setting->lrclk * setting->bclk_lrclk_ratio;

 	/* calculate mclk */