Adding Device Tree support for some RPi audio cards

arch/arm/boot/dts/hifiberry-dac-overlay.dts

@@ -0,0 +1,34 @@
+// Definitions for HiFiBerry DAC
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "hifiberry,hifiberry-dac";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target-path = "/";
+		__overlay__ {
+			pcm5102a-codec {
+				#sound-dai-cells = <0>;
+				compatible = "ti,pcm5102a";
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm/boot/dts/hifiberry-dacplus-overlay.dts

@@ -0,0 +1,39 @@
+// Definitions for HiFiBerry DAC+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "hifiberry,hifiberry-dacplus";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			pcm5122@4d {
+				#sound-dai-cells = <0>;
+				compatible = "ti,pcm5122";
+				reg = <0x4d>;
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm/boot/dts/hifiberry-digi-overlay.dts

@@ -0,0 +1,39 @@
+// Definitions for HiFiBerry Digi
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "hifiberry,hifiberry-digi";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			wm8804@3b {
+				#sound-dai-cells = <0>;
+				compatible = "wlf,wm8804";
+				reg = <0x3b>;
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm/boot/dts/iqaudio-dac-overlay.dts

@@ -0,0 +1,39 @@
+// Definitions for IQaudIO DAC
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "iqaudio,iqaudio-dac";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			pcm5122@4c {
+				#sound-dai-cells = <0>;
+				compatible = "ti,pcm5122";
+				reg = <0x4c>;
+				status = "okay";
+			};
+		};
+	};
+};

arch/arm/boot/dts/iqaudio-dacplus-overlay.dts

@@ -0,0 +1,39 @@
+// Definitions for IQaudIO DAC+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "iqaudio,iqaudio-dac";
+			i2s-controller = <&i2s>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			pcm5122@4c {
+				#sound-dai-cells = <0>;
+				compatible = "ti,pcm5122";
+				reg = <0x4c>;
+				status = "okay";
+			};
+		};
+	};
+};

sound/soc/bcm/hifiberry_dac.c

@@ -72,6 +72,21 @@ static int snd_rpi_hifiberry_dac_probe(struct platform_device *pdev)
 	int ret = 0;
 
 	snd_rpi_hifiberry_dac.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+	    struct device_node *i2s_node;
+	    struct snd_soc_dai_link *dai = &snd_rpi_hifiberry_dac_dai[0];
+	    i2s_node = of_parse_phandle(pdev->dev.of_node,
+					"i2s-controller", 0);
+
+	    if (i2s_node) {
+		dai->cpu_dai_name = NULL;
+		dai->cpu_of_node = i2s_node;
+		dai->platform_name = NULL;
+		dai->platform_of_node = i2s_node;
+	    }
+	}
+
 	ret = snd_soc_register_card(&snd_rpi_hifiberry_dac);
 	if (ret)
 		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
@@ -84,10 +99,17 @@ static int snd_rpi_hifiberry_dac_remove(struct platform_device *pdev)
 	return snd_soc_unregister_card(&snd_rpi_hifiberry_dac);
 }
 
+static const struct of_device_id snd_rpi_hifiberry_dac_of_match[] = {
+	{ .compatible = "hifiberry,hifiberry-dac", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dac_of_match);
+
 static struct platform_driver snd_rpi_hifiberry_dac_driver = {
         .driver = {
                 .name   = "snd-hifiberry-dac",
                 .owner  = THIS_MODULE,
+		.of_match_table = snd_rpi_hifiberry_dac_of_match,
         },
         .probe          = snd_rpi_hifiberry_dac_probe,
         .remove         = snd_rpi_hifiberry_dac_remove,

sound/soc/bcm/hifiberry_dacplus.c

@@ -90,6 +90,21 @@ static int snd_rpi_hifiberry_dacplus_probe(struct platform_device *pdev)
 	int ret = 0;
 
 	snd_rpi_hifiberry_dacplus.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+	    struct device_node *i2s_node;
+	    struct snd_soc_dai_link *dai = &snd_rpi_hifiberry_dacplus_dai[0];
+	    i2s_node = of_parse_phandle(pdev->dev.of_node,
+					"i2s-controller", 0);
+
+	    if (i2s_node) {
+		dai->cpu_dai_name = NULL;
+		dai->cpu_of_node = i2s_node;
+		dai->platform_name = NULL;
+		dai->platform_of_node = i2s_node;
+	    }
+	}
+
 	ret = snd_soc_register_card(&snd_rpi_hifiberry_dacplus);
 	if (ret)
 		dev_err(&pdev->dev,
@@ -103,10 +118,17 @@ static int snd_rpi_hifiberry_dacplus_remove(struct platform_device *pdev)
 	return snd_soc_unregister_card(&snd_rpi_hifiberry_dacplus);
 }
 
+static const struct of_device_id snd_rpi_hifiberry_dacplus_of_match[] = {
+	{ .compatible = "hifiberry,hifiberry-dacplus", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dacplus_of_match);
+
 static struct platform_driver snd_rpi_hifiberry_dacplus_driver = {
 	.driver = {
 		.name   = "snd-rpi-hifiberry-dacplus",
 		.owner  = THIS_MODULE,
+		.of_match_table = snd_rpi_hifiberry_dacplus_of_match,
 	},
 	.probe          = snd_rpi_hifiberry_dacplus_probe,
 	.remove         = snd_rpi_hifiberry_dacplus_remove,

sound/soc/bcm/hifiberry_digi.c

@@ -125,6 +125,21 @@ static int snd_rpi_hifiberry_digi_probe(struct platform_device *pdev)
 	int ret = 0;
 
 	snd_rpi_hifiberry_digi.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+	    struct device_node *i2s_node;
+	    struct snd_soc_dai_link *dai = &snd_rpi_hifiberry_digi_dai[0];
+	    i2s_node = of_parse_phandle(pdev->dev.of_node,
+					"i2s-controller", 0);
+
+	    if (i2s_node) {
+		dai->cpu_dai_name = NULL;
+		dai->cpu_of_node = i2s_node;
+		dai->platform_name = NULL;
+		dai->platform_of_node = i2s_node;
+	    }
+	}
+
 	ret = snd_soc_register_card(&snd_rpi_hifiberry_digi);
 	if (ret)
 		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
@@ -137,10 +152,17 @@ static int snd_rpi_hifiberry_digi_remove(struct platform_device *pdev)
 	return snd_soc_unregister_card(&snd_rpi_hifiberry_digi);
 }
 
+static const struct of_device_id snd_rpi_hifiberry_digi_of_match[] = {
+	{ .compatible = "hifiberry,hifiberry-digi", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_digi_of_match);
+
 static struct platform_driver snd_rpi_hifiberry_digi_driver = {
 	.driver = {
 		.name   = "snd-hifiberry-digi",
 		.owner  = THIS_MODULE,
+		.of_match_table = snd_rpi_hifiberry_digi_of_match,
 	},
 	.probe          = snd_rpi_hifiberry_digi_probe,
 	.remove         = snd_rpi_hifiberry_digi_remove,

sound/soc/bcm/iqaudio-dac.c

@@ -82,6 +82,21 @@ static int snd_rpi_iqaudio_dac_probe(struct platform_device *pdev)
 	int ret = 0;
 
 	snd_rpi_iqaudio_dac.dev = &pdev->dev;
+
+	if (pdev->dev.of_node) {
+	    struct device_node *i2s_node;
+	    struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_dac_dai[0];
+	    i2s_node = of_parse_phandle(pdev->dev.of_node,
+					"i2s-controller", 0);
+
+	    if (i2s_node) {
+		dai->cpu_dai_name = NULL;
+		dai->cpu_of_node = i2s_node;
+		dai->platform_name = NULL;
+		dai->platform_of_node = i2s_node;
+	    }
+	}
+
 	ret = snd_soc_register_card(&snd_rpi_iqaudio_dac);
 	if (ret)
 		dev_err(&pdev->dev,
@@ -99,6 +114,7 @@ static const struct of_device_id iqaudio_of_match[] = {
 	{ .compatible = "iqaudio,iqaudio-dac", },
 	{},
 };
+MODULE_DEVICE_TABLE(of, iqaudio_of_match);
 
 static struct platform_driver snd_rpi_iqaudio_dac_driver = {
 	.driver = {

sound/soc/codecs/pcm5102a.c

@@ -47,12 +47,19 @@ static int pcm5102a_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id pcm5102a_of_match[] = {
+	{ .compatible = "ti,pcm5102a", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pcm5102a_of_match);
+
 static struct platform_driver pcm5102a_codec_driver = {
 	.probe 		= pcm5102a_probe,
 	.remove 	= pcm5102a_remove,
 	.driver		= {
 		.name	= "pcm5102a-codec",
 		.owner	= THIS_MODULE,
+		.of_match_table = pcm5102a_of_match,
 	},
 };