Re: [Patch v2 4/4] ASoC: sam9g20-wm8731: convert to device tree support

[Nicolas Ferre <nicolas.ferre@atmel.com>]

On 10/31/2012 08:27 AM, Bo Shen :
> convert sam9g20-wm8731 to device tree support.
> 
> Signed-off-by: Bo Shen <voice.shen@atmel.com>

Seems ok for AT91. But will certainly need more eyes for the audio part...

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

> ---
> Change since v1:
>   Add sam9g20-wm8731 binding document
> ---
>  .../bindings/sound/atmel-sam9g20-audio-wm8731.txt  |   21 ++++++++
>  arch/arm/boot/dts/at91sam9g20ek_common.dtsi        |   25 +++++++++-
>  sound/soc/atmel/Kconfig                            |    3 +-
>  sound/soc/atmel/sam9g20_wm8731.c                   |   51 +++++++++++++++++++-
>  4 files changed, 94 insertions(+), 6 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/sound/atmel-sam9g20-audio-wm8731.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/atmel-sam9g20-audio-wm8731.txt b/Documentation/devicetree/bindings/sound/atmel-sam9g20-audio-wm8731.txt
> new file mode 100644
> index 0000000..04a39dd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/atmel-sam9g20-audio-wm8731.txt
> @@ -0,0 +1,21 @@
> +* Atmel sam9g20ek audio complex
> +
> +Required properties:
> +  - compatible: "atmel,at91sam9g20-audio"
> +  - atmel,model: The user-visible name of this sound complex.
> +  - atmel,audio-routing: A list of the connections between audio components.
> +  - atmel,dai: The phandle of the dai based on SSC controller
> +  - atmel,audio-codec: The phandle of the WM8731 audio codec
> +
> +Example:
> +sound {
> +	compatible = "atmel,at91sam9g20-audio";
> +	atmel,model = "wm8731 @ sam9g20ek";
> +
> +	atmel,audio-routing =
> +		"Ext Spk", "LHPOUT",
> +		"Int MIC", "MICIN";
> +
> +	atmel,dai = <&dai>;
> +	atmel,audio-codec = <&wm8731>;
> +};
> 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..397ec75 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 c3e1df5..0a275d0 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 sam9g20ek_wm8731_dt_ids[] = {
> +	{ .compatible = "atmel,at91sam9g20-audio", },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, sam9g20ek_wm8731_dt_ids);
> +#endif
> +
>  static struct platform_driver at91sam9g20ek_audio_driver = {
>  	.driver = {
>  		.name	= "at91sam9g20ek-audio",
>  		.owner	= THIS_MODULE,
> +		.of_match_table = of_match_ptr(sam9g20ek_wm8731_dt_ids),
>  	},
>  	.probe	= at91sam9g20ek_audio_probe,
>  	.remove	= __devexit_p(at91sam9g20ek_audio_remove),
> 


-- 
Nicolas Ferre