ASoC: tlv320adcx140: Add GPO configuration and drive output config

Add General Purpose Output (GPO) configuration and driver output
configuration.  The GPOs can be configured as a GPO, IRQ, SDOUT or a
PDMCLK output.  In addition the output drive can be configured with
various configurations.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200728160833.24130-2-dmurphy@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/tlv320adcx140.c

@@ -37,6 +37,13 @@ struct adcx140_priv {
 	unsigned int slot_width;
 };
 
+static const char * const gpo_config_names[] = {
+	"ti,gpo-config-1",
+	"ti,gpo-config-2",
+	"ti,gpo-config-3",
+	"ti,gpo-config-4",
+};
+
 static const struct reg_default adcx140_reg_defaults[] = {
 	{ ADCX140_PAGE_SELECT, 0x00 },
 	{ ADCX140_SW_RESET, 0x00 },
@@ -60,10 +67,10 @@ static const struct reg_default adcx140_reg_defaults[] = {
 	{ ADCX140_PDMCLK_CFG, 0x40 },
 	{ ADCX140_PDM_CFG, 0x00 },
 	{ ADCX140_GPIO_CFG0, 0x22 },
+	{ ADCX140_GPO_CFG0, 0x00 },
 	{ ADCX140_GPO_CFG1, 0x00 },
 	{ ADCX140_GPO_CFG2, 0x00 },
 	{ ADCX140_GPO_CFG3, 0x00 },
-	{ ADCX140_GPO_CFG4, 0x00 },
 	{ ADCX140_GPO_VAL, 0x00 },
 	{ ADCX140_GPIO_MON, 0x00 },
 	{ ADCX140_GPI_CFG0, 0x00 },
@@ -756,6 +763,43 @@ static const struct snd_soc_dai_ops adcx140_dai_ops = {
 	.set_tdm_slot	= adcx140_set_dai_tdm_slot,
 };
 
+static int adcx140_configure_gpo(struct adcx140_priv *adcx140)
+{
+	u32 gpo_outputs[ADCX140_NUM_GPOS];
+	u32 gpo_output_val = 0;
+	int ret;
+	int i;
+
+	for (i = 0; i < ADCX140_NUM_GPOS; i++) {
+		ret = device_property_read_u32_array(adcx140->dev,
+						     gpo_config_names[i],
+						     gpo_outputs,
+						     ADCX140_NUM_GPO_CFGS);
+		if (ret)
+			continue;
+
+		if (gpo_outputs[0] > ADCX140_GPO_CFG_MAX) {
+			dev_err(adcx140->dev, "GPO%d config out of range\n", i + 1);
+			return -EINVAL;
+		}
+
+		if (gpo_outputs[1] > ADCX140_GPO_DRV_MAX) {
+			dev_err(adcx140->dev, "GPO%d drive out of range\n", i + 1);
+			return -EINVAL;
+		}
+
+		gpo_output_val = gpo_outputs[0] << ADCX140_GPO_SHIFT |
+				 gpo_outputs[1];
+		ret = regmap_write(adcx140->regmap, ADCX140_GPO_CFG1 + i,
+				   gpo_output_val);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+
+}
+
 static int adcx140_codec_probe(struct snd_soc_component *component)
 {
 	struct adcx140_priv *adcx140 = snd_soc_component_get_drvdata(component);
@@ -837,6 +881,10 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 			return ret;
 	}
 
+	ret = adcx140_configure_gpo(adcx140);
+	if (ret)
+		goto out;
+
 	ret = adcx140_reset(adcx140);
 	if (ret)
 		goto out;

sound/soc/codecs/tlv320adcx140.h

@@ -36,10 +36,10 @@
 #define ADCX140_PDMCLK_CFG	0x1f
 #define ADCX140_PDM_CFG		0x20
 #define ADCX140_GPIO_CFG0	0x21
-#define ADCX140_GPO_CFG1	0x22
-#define ADCX140_GPO_CFG2	0x23
-#define ADCX140_GPO_CFG3	0x24
-#define ADCX140_GPO_CFG4	0x25
+#define ADCX140_GPO_CFG0	0x22
+#define ADCX140_GPO_CFG1	0x23
+#define ADCX140_GPO_CFG2	0x24
+#define ADCX140_GPO_CFG3	0x25
 #define ADCX140_GPO_VAL		0x29
 #define ADCX140_GPIO_MON	0x2a
 #define ADCX140_GPI_CFG0	0x2b
@@ -139,4 +139,10 @@
 #define ADCX140_GPI3_INDEX		2
 #define ADCX140_GPI4_INDEX		3
 
+#define ADCX140_NUM_GPOS		4
+#define ADCX140_NUM_GPO_CFGS		2
+#define ADCX140_GPO_SHIFT		4
+#define ADCX140_GPO_CFG_MAX		4
+#define ADCX140_GPO_DRV_MAX		5
+
 #endif /* _TLV320ADCX140_ */