soc: pcm3168a: Add DT binding to force clock consumer mode

ASoC cannot configure the codec correctly when the ADC and DAC share clock
lines and one of them is the clock producer. Add a DT binding that
overrides ASoC and forces the component into clock consumer mode.

Signed-off-by: Stephen Gordon <gordoste@iinet.net.au>

Author: gordoste

sound/soc/codecs/pcm3168a.c

@@ -60,6 +60,7 @@ struct pcm3168a_priv {
 	struct clk *scki;
 	struct gpio_desc *gpio_rst;
 	unsigned long sysclk;
+	bool adc_fc, dac_fc; // Force clock consumer mode
 
 	struct pcm3168a_io_params io_params[2];
 	struct snd_soc_dai_driver dai_drv[2];
@@ -478,6 +479,12 @@ static int pcm3168a_hw_params(struct snd_pcm_substream *substream,
 		ms = 0;
 	}
 
+	// Force clock consumer mode if needed
+	if (pcm3168a->adc_fc && dai->id == PCM3168A_DAI_ADC)
+		ms = 0;
+	if (pcm3168a->dac_fc && dai->id == PCM3168A_DAI_DAC)
+		ms = 0;
+
 	format = io_params->format;
 
 	if (io_params->slot_width)
@@ -756,6 +763,11 @@ int pcm3168a_probe(struct device *dev, struct regmap *regmap)
 
 	pcm3168a->sysclk = clk_get_rate(pcm3168a->scki);
 
+	pcm3168a->adc_fc = of_property_read_bool(dev->of_node,
+		"adc-force-cons");
+	pcm3168a->dac_fc = of_property_read_bool(dev->of_node,
+		"dac-force-cons");
+
 	for (i = 0; i < ARRAY_SIZE(pcm3168a->supplies); i++)
 		pcm3168a->supplies[i].supply = pcm3168a_supply_names[i];