From 79fc48e41e39d7a98c5f8ae37f613d7ff9953c86 Mon Sep 17 00:00:00 2001
From: Dan Murphy <dmurphy@ti.com>
Date: Thu, 14 May 2020 07:33:38 -0500
Subject: [PATCH] ASoC: tlv320adcx140: Configure PDM sampling edge
Git-commit: 79fc48e41e39d7a98c5f8ae37f613d7ff9953c86
Patch-mainline: v5.8-rc1
References: jsc#SLE-16518

Configure the PDM sampling edges based on the values from the firmware.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200514123338.20392-3-dmurphy@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/codecs/tlv320adcx140.c |   22 ++++++++++++++++++++++
 sound/soc/codecs/tlv320adcx140.h |    3 +++
 2 files changed, 25 insertions(+)

--- a/sound/soc/codecs/tlv320adcx140.c
+++ b/sound/soc/codecs/tlv320adcx140.c
@@ -761,6 +761,10 @@ static int adcx140_codec_probe(struct sn
 	u32 bias_source;
 	u32 vref_source;
 	u8 bias_cfg;
+	int pdm_count;
+	u32 pdm_edges[ADCX140_NUM_PDM_EDGES];
+	u32 pdm_edge_val = 0;
+	int i;
 	int ret;
 
 	ret = device_property_read_u32(adcx140->dev, "ti,mic-bias-source",
@@ -787,6 +791,24 @@ static int adcx140_codec_probe(struct sn
 
 	bias_cfg = bias_source << ADCX140_MIC_BIAS_SHIFT | vref_source;
 
+	pdm_count = device_property_count_u32(adcx140->dev,
+					      "ti,pdm-edge-select");
+	if (pdm_count <= ADCX140_NUM_PDM_EDGES && pdm_count > 0) {
+		ret = device_property_read_u32_array(adcx140->dev,
+						     "ti,pdm-edge-select",
+						     pdm_edges, pdm_count);
+		if (ret)
+			return ret;
+
+		for (i = 0; i < pdm_count; i++)
+			pdm_edge_val |= pdm_edges[i] << (ADCX140_PDM_EDGE_SHIFT - i);
+
+		ret = regmap_write(adcx140->regmap, ADCX140_PDM_CFG,
+				   pdm_edge_val);
+		if (ret)
+			return ret;
+	}
+
 	ret = adcx140_reset(adcx140);
 	if (ret)
 		goto out;
--- a/sound/soc/codecs/tlv320adcx140.h
+++ b/sound/soc/codecs/tlv320adcx140.h
@@ -129,4 +129,7 @@
 
 #define ADCX140_TX_OFFSET_MASK		GENMASK(4, 0)
 
+#define ADCX140_NUM_PDM_EDGES		4
+#define ADCX140_PDM_EDGE_SHIFT		7
+
 #endif /* _TLV320ADCX140_ */