[alsa-devel] [PATCH RFC 1/7] ASoC: tlv320aic26: Add device tree binding

[Cormier, Jonathan]

Signed-off-by: Cormier, Jonathan <jcormier at criticallink.com>
---
 .../devicetree/bindings/sound/tlv320aic26.txt      | 65 ++++++++++++++++++++++
 sound/soc/codecs/tlv320aic26.c                     | 10 ++++
 2 files changed, 75 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/tlv320aic26.txt

diff --git a/Documentation/devicetree/bindings/sound/tlv320aic26.txt b/Documentation/devicetree/bindings/sound/tlv320aic26.txt
new file mode 100644
index 000000000000..93aa0f76ec0d
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/tlv320aic26.txt
@@ -0,0 +1,65 @@
+Texas Instruments - tlv320aic26 Codec module
+
+The tlv320aic26 serial control bus communicates through I2C protocols
+
+Required properties:
+
+- compatible - "string" - One of:
+    "ti,tlv320aic26" - TLV320AIC26
+- reg - <int> -  SPI chip select
+
+CODEC input pins:
+  * MICIN
+  * AUX
+
+CODEC output pins:
+  * HPL
+  * HPR
+
+The pins can be used in referring sound node's audio-routing property.
+
+Example:
+
+tlv320aic26: tlv320aic26 at 0 {
+	compatible = "ti,tlv320aic26";
+	reg = <0>;
+};
+
+&spi0 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&spi0_pins>;
+	pinctrl-1 = <&spi0_sleep_pins>;
+
+	status = "okay";
+	ti,pindir-d0-out-d1-in = <1>;
+
+	tlv320aic26: tlv320aic26 at 1 {
+		compatible = "ti,tlv320aic26";
+		reg = <0x1>;
+		status = "okay";
+
+		spi-max-frequency = <2000000>;
+		spi-cpha;
+	};
+};
+
+sound {
+	compatible = "simple-audio-card";
+	simple-audio-card,name = "AM335x_SND";
+	simple-audio-card,format = "dsp_b";
+	/* SND_SOC_DAIFMT_CBM_CFM */
+	simple-audio-card,bitclock-master = <&tlv320aic26_codec>;
+	simple-audio-card,frame-master = <&tlv320aic26_codec>;
+	/* SND_SOC_DAIFMT_IB_NF */
+	simple-audio-card,bitclock-inversion;
+
+	simple-audio-card,cpu {
+		sound-dai = <&mcasp1>;
+		system-clock-frequency = <24576000>;
+	};
+
+	tlv320aic26_codec: simple-audio-card,codec {
+		sound-dai = <&tlv320aic26>;
+		system-clock-frequency = <24576000>;
+	};
+};
diff --git a/sound/soc/codecs/tlv320aic26.c b/sound/soc/codecs/tlv320aic26.c
index 620ab9ea1ef0..91fdd96648bd 100644
--- a/sound/soc/codecs/tlv320aic26.c
+++ b/sound/soc/codecs/tlv320aic26.c
@@ -370,10 +370,20 @@ static int aic26_spi_remove(struct spi_device *spi)
 	return 0;
 }
 
+#if defined(CONFIG_OF)
+static const struct of_device_id tlv320aic26_of_match[] = {
+	{ .compatible = "ti,tlv320aic26", },
+	{},
+};
+#endif
+
 static struct spi_driver aic26_spi = {
 	.driver = {
 		.name = "tlv320aic26-codec",
 		.owner = THIS_MODULE,
+#if defined(CONFIG_OF)
+		.of_match_table = of_match_ptr(tlv320aic26_of_match),
+#endif
 	},
 	.probe = aic26_spi_probe,
 	.remove = aic26_spi_remove,
-- 
1.9.1