[PATCHv7][ 2/5] ASoC: eukrea-tlv320: Add DT support.

Grant Likely grant.likely at secretlab.ca
Fri Oct 25 15:15:13 EDT 2013


On Thu, 24 Oct 2013 14:13:49 +0200, Denis Carikli <denis at eukrea.com> wrote:
> Cc: Rob Herring <rob.herring at calxeda.com>
> Cc: Pawel Moll <pawel.moll at arm.com>
> Cc: Mark Rutland <mark.rutland at arm.com>
> Cc: Stephen Warren <swarren at wwwdotorg.org>
> Cc: Ian Campbell <ijc+devicetree at hellion.org.uk>
> Cc: devicetree at vger.kernel.org
> Cc: Liam Girdwood <lgirdwood at gmail.com>
> Cc: Mark Brown <broonie at kernel.org>
> Cc: alsa-devel at alsa-project.org
> Cc: Sascha Hauer <kernel at pengutronix.de>
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: Eric Bénard <eric at eukrea.com>
> 
> Signed-off-by: Denis Carikli <denis at eukrea.com>
> ---
> ChangeLog v6->v7:
> - The cleanups went into another patch.
> - The support for fsl_ssi doesn't depend on dt anymore.
> - platform_name = "imx-ssi.0" is still set when in non-dt mode.
> ---
>  .../devicetree/bindings/sound/eukrea-tlv320.txt    |   23 +++++
>  sound/soc/fsl/Kconfig                              |    5 +-
>  sound/soc/fsl/eukrea-tlv320.c                      |   88 ++++++++++++++++++--
>  3 files changed, 107 insertions(+), 9 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/sound/eukrea-tlv320.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/eukrea-tlv320.txt b/Documentation/devicetree/bindings/sound/eukrea-tlv320.txt
> new file mode 100644
> index 0000000..8791037
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/eukrea-tlv320.txt
> @@ -0,0 +1,23 @@
> +Audio complex for Eukrea boards with tlv320aic23 codec.
> +
> +Required properties:
> +- compatible : "eukrea,eukrea-tlv320"

Nit: why the double "eukrea"? I have no problem if yo think that's the
best string, it just looks odd.

> +- model : The user-visible name of this sound complex.
> +- ssi-controller : The phandle of the SSI controller.
> +- audio-codec : The phandle of the tlv320aic23 audio codec.
> +- mux-int-port : The internal port of the i.MX audio muxer (AUDMUX).
> +- mux-ext-port : The external port of the i.MX audio muxer.
> +
> +Note: The AUDMUX port numbering should start at 1, which is consistent with
> +hardware manual.

Looks okay to me. I've not been following the sound bindings very
closely. Are the described properties a common pattern for sound complex
bindings?

> +
> +Example:
> +
> +	sound {
> +		compatible = "eukrea,eukrea-tlv320";
> +		model = "imx51-eukrea-tlv320aic23";
> +		ssi-controller = <&ssi2>;
> +		fsl,audio-codec = <&tlv320aic23>;
> +		mux-int-port = <2>;
> +		mux-ext-port = <3>;
> +	};
> diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
> index b7ab71f..9c3cd64 100644
> --- a/sound/soc/fsl/Kconfig
> +++ b/sound/soc/fsl/Kconfig
> @@ -161,12 +161,15 @@ config SND_SOC_EUKREA_TLV320
>  	depends on MACH_EUKREA_MBIMX27_BASEBOARD \
>  		|| MACH_EUKREA_MBIMXSD25_BASEBOARD \
>  		|| MACH_EUKREA_MBIMXSD35_BASEBOARD \
> -		|| MACH_EUKREA_MBIMXSD51_BASEBOARD
> +		|| MACH_EUKREA_MBIMXSD51_BASEBOARD \
> +		|| OF
>  	depends on I2C
>  	select SND_SOC_TLV320AIC23
>  	select SND_SOC_IMX_PCM_FIQ
>  	select SND_SOC_IMX_AUDMUX
>  	select SND_SOC_IMX_SSI
> +	select SND_SOC_FSL_SSI
> +	select SND_SOC_IMX_PCM_DMA
>  	help
>  	  Enable I2S based access to the TLV320AIC23B codec attached
>  	  to the SSI interface
> diff --git a/sound/soc/fsl/eukrea-tlv320.c b/sound/soc/fsl/eukrea-tlv320.c
> index 5983740..ad1aac6 100644
> --- a/sound/soc/fsl/eukrea-tlv320.c
> +++ b/sound/soc/fsl/eukrea-tlv320.c
> @@ -15,8 +15,11 @@
>   *
>   */
>  
> +#include <linux/errno.h>
>  #include <linux/module.h>
>  #include <linux/moduleparam.h>
> +#include <linux/of.h>
> +#include <linux/of_platform.h>
>  #include <linux/device.h>
>  #include <linux/i2c.h>
>  #include <sound/core.h>
> @@ -26,6 +29,7 @@
>  
>  #include "../codecs/tlv320aic23.h"
>  #include "imx-ssi.h"
> +#include "fsl_ssi.h"
>  #include "imx-audmux.h"
>  
>  #define CODEC_CLOCK 12000000
> @@ -41,7 +45,8 @@ static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
>  	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
>  				  SND_SOC_DAIFMT_NB_NF |
>  				  SND_SOC_DAIFMT_CBM_CFM);
> -	if (ret) {
> +	/* fsl_ssi lacks the set_fmt ops. */
> +	if (ret && ret != -ENOTSUPP) {
>  		dev_err(cpu_dai->dev,
>  			"Failed to set the cpu dai format.\n");
>  		return ret;
> @@ -63,11 +68,13 @@ static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
>  			"Failed to set the codec sysclk.\n");
>  		return ret;
>  	}
> +
>  	snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffc, 0xffffffc, 2, 0);
>  
>  	ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
>  				SND_SOC_CLOCK_IN);
> -	if (ret) {
> +	/* fsl_ssi lacks the set_sysclk ops */
> +	if (ret && ret != -EINVAL) {
>  		dev_err(cpu_dai->dev,
>  			"Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
>  		return ret;
> @@ -84,7 +91,6 @@ static struct snd_soc_dai_link eukrea_tlv320_dai = {
>  	.name		= "tlv320aic23",
>  	.stream_name	= "TLV320AIC23",
>  	.codec_dai_name	= "tlv320aic23-hifi",
> -	.platform_name	= "imx-ssi.0",
>  	.codec_name	= "tlv320aic23-codec.0-001a",
>  	.cpu_dai_name	= "imx-ssi.0",
>  	.ops		= &eukrea_tlv320_snd_ops,
> @@ -101,8 +107,49 @@ static int eukrea_tlv320_probe(struct platform_device *pdev)
>  {
>  	int ret;
>  	int int_port = 0, ext_port;
> +	struct platform_device *ssi_pdev;
> +	struct device_node *np = pdev->dev.of_node;
> +	struct device_node *ssi_np;
> +
> +	if (np) {
> +		ssi_np = of_parse_phandle(pdev->dev.of_node,
> +					  "ssi-controller", 0);
> +		ssi_pdev = of_find_device_by_node(ssi_np);
> +		if (!ssi_pdev) {
> +			dev_err(&pdev->dev,
> +				"ssi-controller missing or invalid.\n");
> +			ret = -ENODEV;
> +			goto err;
> +		}
> +
> +		ret = of_property_read_u32(np, "mux-int-port", &int_port);
> +		if (ret) {
> +			dev_err(&pdev->dev,
> +				"mux-int-port missing or invalid\n");
> +			return ret;
> +		}
> +		ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
> +		if (ret) {
> +			dev_err(&pdev->dev,
> +				"mux-ext-port missing or invalid\n");
> +			return ret;
> +		}
> +
> +		/*
> +		 * The port numbering in the hardware manual starts at 1, while
> +		 * the audmux API expects it starts at 0.
> +		 */
> +		int_port--;
> +		ext_port--;
> +
> +		eukrea_tlv320_dai.cpu_dai_name = dev_name(&ssi_pdev->dev);
> +		eukrea_tlv320_dai.platform_of_node = ssi_np;
> +	} else {
> +		eukrea_tlv320_dai.platform_name = "imx-ssi.0";
> +	}
>  
> -	if (machine_is_eukrea_cpuimx27()) {
> +	if (machine_is_eukrea_cpuimx27() ||
> +	    of_find_compatible_node(NULL, NULL, "fsl,imx21-audmux")) {
>  		imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
>  			IMX_AUDMUX_V1_PCR_SYN |
>  			IMX_AUDMUX_V1_PCR_TFSDIR |
> @@ -119,8 +166,12 @@ static int eukrea_tlv320_probe(struct platform_device *pdev)
>  		);
>  	} else if (machine_is_eukrea_cpuimx25sd() ||
>  		   machine_is_eukrea_cpuimx35sd() ||
> -		   machine_is_eukrea_cpuimx51sd()) {
> -		ext_port = machine_is_eukrea_cpuimx25sd() ? 4 : 3;
> +		   machine_is_eukrea_cpuimx51sd() ||
> +		   of_find_compatible_node(NULL, NULL, "fsl,imx31-audmux")) {
> +		if (!np)
> +			ext_port = machine_is_eukrea_cpuimx25sd() ?
> +				4 : 3;
> +
>  		imx_audmux_v2_configure_port(int_port,
>  			IMX_AUDMUX_V2_PTCR_SYN |
>  			IMX_AUDMUX_V2_PTCR_TFSDIR |
> @@ -134,14 +185,28 @@ static int eukrea_tlv320_probe(struct platform_device *pdev)
>  			IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
>  		);
>  	} else {
> -		/* return happy. We might run on a totally different machine */
> -		return 0;
> +		if (np) {
> +			/* The eukrea,eukrea-tlv320 driver was explicitely
> +			 * requested (through the device tree).
> +			 */
> +			dev_err(&pdev->dev,
> +				"Missing audmux DT node.\n");
> +			return -ENODEV;
> +		} else {
> +			/* Return happy.
> +			 * We might run on a totally different machine.
> +			 */
> +			return 0;
> +		}
>  	}
>  
>  	eukrea_tlv320.dev = &pdev->dev;
>  	ret = snd_soc_register_card(&eukrea_tlv320);
> +err:
>  	if (ret)
>  		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
> +	if (np)
> +		of_node_put(ssi_np);
>  
>  	return ret;
>  }
> @@ -153,10 +218,17 @@ static int eukrea_tlv320_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static const struct of_device_id imx_tlv320_dt_ids[] = {
> +	{ .compatible = "eukrea,eukrea-tlv320"},
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
> +
>  static struct platform_driver eukrea_tlv320_driver = {
>  	.driver = {
>  		.name = "eukrea_tlv320",
>  		.owner = THIS_MODULE,
> +		.of_match_table = imx_tlv320_dt_ids,
>  	},
>  	.probe = eukrea_tlv320_probe,
>  	.remove = eukrea_tlv320_remove,
> -- 
> 1.7.9.5
> 
> 
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