openwrtv3/target/linux/brcm2708/patches-4.1/0062-Add-Device-Tree-support-for-RPi-DAC.patch

From 53a42fe2c62f1a21329c737321f59e0ab97ac655 Mon Sep 17 00:00:00 2001
From: Clive Messer <clive.m.messer@gmail.com>
Date: Thu, 2 Apr 2015 12:22:55 +0100
Subject: [PATCH 062/222] Add Device Tree support for RPi-DAC.

---
 sound/soc/bcm/rpi-dac.c     | 21 +++++++++++++++++++++
 sound/soc/codecs/pcm1794a.c |  7 +++++++
 2 files changed, 28 insertions(+)

--- a/sound/soc/bcm/rpi-dac.c
+++ b/sound/soc/bcm/rpi-dac.c
@@ -69,6 +69,20 @@ static int snd_rpi_rpi_dac_probe(struct
 	int ret = 0;
 
 	snd_rpi_rpi_dac.dev = &pdev->dev;
+	
+	if (pdev->dev.of_node) {
+		struct device_node *i2s_node;
+		struct snd_soc_dai_link *dai = &snd_rpi_rpi_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_rpi_dac);
 	if (ret)
 		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret);
@@ -81,10 +95,17 @@ static int snd_rpi_rpi_dac_remove(struct
 	return snd_soc_unregister_card(&snd_rpi_rpi_dac);
 }
 
+static const struct of_device_id snd_rpi_rpi_dac_of_match[] = {
+	{ .compatible = "rpi,rpi-dac", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, snd_rpi_rpi_dac_of_match);
+
 static struct platform_driver snd_rpi_rpi_dac_driver = {
         .driver = {
                 .name   = "snd-rpi-dac",
                 .owner  = THIS_MODULE,
+                .of_match_table = snd_rpi_rpi_dac_of_match,
         },
         .probe          = snd_rpi_rpi_dac_probe,
         .remove         = snd_rpi_rpi_dac_remove,
--- a/sound/soc/codecs/pcm1794a.c
+++ b/sound/soc/codecs/pcm1794a.c
@@ -46,12 +46,19 @@ static int pcm1794a_remove(struct platfo
 	return 0;
 }
 
+static const struct of_device_id pcm1794a_of_match[] = {
+	{ .compatible = "ti,pcm1794a", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pcm1794a_of_match);
+
 static struct platform_driver pcm1794a_codec_driver = {
 	.probe 		= pcm1794a_probe,
 	.remove 	= pcm1794a_remove,
 	.driver		= {
 		.name	= "pcm1794a-codec",
 		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(pcm1794a_of_match),
 	},
 };