ASoC: at91sam9g20ek-wm8731: convert to dt support

convert at91sam9g20ek with wm8731 to device tree support

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 62 insertions, 4 deletions

diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig
index 72b09cfd3dc3..397ec7526a5a 100644
--- a/sound/soc/atmel/Kconfig
+++ b/sound/soc/atmel/Kconfig
@@ -16,8 +16,7 @@ config SND_ATMEL_SOC_SSC
 
 config SND_AT91_SOC_SAM9G20_WM8731
         tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
-        depends on ATMEL_SSC && ARCH_AT91SAM9G20 && SND_ATMEL_SOC && \
-                   AT91_PROGRAMMABLE_CLOCKS
+        depends on ATMEL_SSC && SND_ATMEL_SOC && AT91_PROGRAMMABLE_CLOCKS
         select SND_ATMEL_SOC_SSC
         select SND_SOC_WM8731
         help
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
index 4deba189bf10..0744610e53dd 100644
--- a/sound/soc/atmel/sam9g20_wm8731.c
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -38,6 +38,8 @@
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 
+#include <linux/pinctrl/consumer.h>
+
 #include <linux/atmel-ssc.h>
 
 #include <sound/core.h>
@@ -197,12 +199,24 @@ static struct snd_soc_card snd_soc_at91sam9g20ek = {
 
 static int __devinit at91sam9g20ek_audio_probe(struct platform_device *pdev)
 {
+        struct device_node *np = pdev->dev.of_node;
+        struct device_node *codec_np, *cpu_np;
         struct clk *pllb;
         struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
+        struct pinctrl *pinctrl;
         int ret;
 
-        if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
-                return -ENODEV;
+        pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+        if (IS_ERR(pinctrl)) {
+                dev_err(&pdev->dev, "Failed to request pinctrl for mck\n");
+                return PTR_ERR(pinctrl);
+        }
+
+        if (!np) {
+                if (!(machine_is_at91sam9g20ek() ||
+                        machine_is_at91sam9g20ek_2mmc()))
+                        return -ENODEV;
+        }
 
         ret = atmel_ssc_set_audio(0);
         if (ret) {
@@ -236,6 +250,42 @@ static int __devinit at91sam9g20ek_audio_probe(struct platform_device *pdev)
         clk_set_rate(mclk, MCLK_RATE);
 
         card->dev = &pdev->dev;
+
+        /* Parse device node info */
+        if (np) {
+                ret = snd_soc_of_parse_card_name(card, "atmel,model");
+                if (ret)
+                        goto err;
+
+                ret = snd_soc_of_parse_audio_routing(card,
+                        "atmel,audio-routing");
+                if (ret)
+                        goto err;
+
+                /* Parse codec info */
+                at91sam9g20ek_dai.codec_name = NULL;
+                codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
+                if (!codec_np) {
+                        dev_err(&pdev->dev, "codec info missing\n");
+                        return -EINVAL;
+                }
+                at91sam9g20ek_dai.codec_of_node = codec_np;
+
+                /* Parse dai and platform info */
+                at91sam9g20ek_dai.cpu_dai_name = NULL;
+                at91sam9g20ek_dai.platform_name = NULL;
+                cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
+                if (!cpu_np) {
+                        dev_err(&pdev->dev, "dai and pcm info missing\n");
+                        return -EINVAL;
+                }
+                at91sam9g20ek_dai.cpu_of_node = cpu_np;
+                at91sam9g20ek_dai.platform_of_node = cpu_np;
+
+                of_node_put(codec_np);
+                of_node_put(cpu_np);
+        }
+
         ret = snd_soc_register_card(card);
         if (ret) {
                 printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
@@ -263,10 +313,19 @@ static int __devexit at91sam9g20ek_audio_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
+        { .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
+        { }
+};
+MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
+#endif
+
 static struct platform_driver at91sam9g20ek_audio_driver = {
         .driver = {
                 .name   = "at91sam9g20ek-audio",
                 .owner  = THIS_MODULE,
+                .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
         },
         .probe  = at91sam9g20ek_audio_probe,
         .remove = __devexit_p(at91sam9g20ek_audio_remove),