Covert sam9g20 wm8731 to device tree support And enable it through dts file
Tested on sam9g20 EK board
Signed-off-by: Bo Shen voice.shen@atmel.com --- arch/arm/boot/dts/at91sam9g20ek_common.dtsi | 25 +++++++++++-- sound/soc/atmel/Kconfig | 2 +- sound/soc/atmel/sam9g20_wm8731.c | 51 +++++++++++++++++++++++++-- 3 files changed, 73 insertions(+), 5 deletions(-)
diff --git a/arch/arm/boot/dts/at91sam9g20ek_common.dtsi b/arch/arm/boot/dts/at91sam9g20ek_common.dtsi index b06c0db..056ff33 100644 --- a/arch/arm/boot/dts/at91sam9g20ek_common.dtsi +++ b/arch/arm/boot/dts/at91sam9g20ek_common.dtsi @@ -51,6 +51,10 @@ atmel,vbus-gpio = <&pioC 5 0>; status = "okay"; }; + + ssc0: ssc@fffbc000 { + status = "okay"; + }; };
nand0: nand@40000000 { @@ -114,8 +118,8 @@ reg = <0x50>; };
- wm8731@1b { - compatible = "wm8731"; + wm8731: wm8731@1b { + compatible = "wlf,wm8731"; reg = <0x1b>; }; }; @@ -139,4 +143,21 @@ gpio-key,wakeup; }; }; + + dai: dai { + compatible = "atmel,atmel-ssc-dai"; + atmel,dai-master = <&ssc0>; + }; + + sound { + compatible = "atmel,at91sam9g20-audio"; + atmel,model = "wm8731 @ sam9g20ek"; + + atmel,audio-routing = + "Ext Spk", "LHPOUT", + "Int Mic", "MICIN"; + + atmel,audio-codec = <&wm8731>; + atmel,dai = <&dai>; + }; }; diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig index 72b09cf..43a82f0 100644 --- a/sound/soc/atmel/Kconfig +++ b/sound/soc/atmel/Kconfig @@ -16,7 +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 && \ + depends on ATMEL_SSC && SND_ATMEL_SOC && \ AT91_PROGRAMMABLE_CLOCKS select SND_ATMEL_SOC_SSC select SND_SOC_WM8731 diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c index e5e27db..187dc65 100644 --- a/sound/soc/atmel/sam9g20_wm8731.c +++ b/sound/soc/atmel/sam9g20_wm8731.c @@ -197,13 +197,17 @@ 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; int ret;
- if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc())) + if (!np) { + if (!(machine_is_at91sam9g20ek() + || machine_is_at91sam9g20ek_2mmc())) return -ENODEV; - + } /* * Codec MCLK is supplied by PCK0 - set it up. */ @@ -230,6 +234,40 @@ 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 dai 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; + at91sam9g20ek_dai.cpu_dai_name = NULL; + at91sam9g20ek_dai.platform_name = NULL; + cpu_np = of_parse_phandle(np, "atmel,dai", 0); + if (!cpu_np) { + dev_err(&pdev->dev, "dai 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"); @@ -255,10 +293,19 @@ static int __devexit at91sam9g20ek_audio_remove(struct platform_device *pdev) return 0; }
+#ifdef CONFIG_OF +static const struct of_device_id atmel_wm8731_dt_ids[] = { + { .compatible = "atmel,at91sam9g20-audio", }, + { } +}; +MODULE_DEVICE_TABLE(of, atmel_wm8731_dt_ids); +#endif + static struct platform_driver at91sam9g20ek_audio_driver = { .driver = { .name = "at91sam9g20ek-audio", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(atmel_wm8731_dt_ids), }, .probe = at91sam9g20ek_audio_probe, .remove = __devexit_p(at91sam9g20ek_audio_remove),