Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 40592627 authored by Hans de Goede's avatar Hans de Goede Committed by Mark Brown
Browse files

ASoC: sun4i-codec: Add support for PA gpio pin 



Add support for PA gpio pin for controlling an external amplifier as used
on some Allwinner boards.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent e6415b48

Documentation/devicetree/bindings/sound/sun4i-codec.txt

+3 −0
Original line number Original line Diff line number Diff line
@@ -14,6 +14,9 @@ Required properties: 
   - "apb": the parent APB clock for this controller

   - "apb": the parent APB clock for this controller

   - "codec": the parent module clock

   - "codec": the parent module clock





Optional properties:

- allwinner,pa-gpios: gpio to enable external amplifier



Example:

Example:

codec: codec@01c22c00 {

codec: codec@01c22c00 {

	#sound-dai-cells = <0>;

	#sound-dai-cells = <0>;

sound/soc/sunxi/sun4i-codec.c

+35 −0
Original line number Original line Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/of_address.h>

#include <linux/of_address.h>

#include <linux/clk.h>

#include <linux/clk.h>

#include <linux/regmap.h>

#include <linux/regmap.h>

#include <linux/gpio/consumer.h>





#include <sound/core.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/pcm.h>
@@ -103,6 +104,7 @@ struct sun4i_codec { 
	struct regmap	*regmap;

	struct regmap	*regmap;

	struct clk	*clk_apb;

	struct clk	*clk_apb;

	struct clk	*clk_module;

	struct clk	*clk_module;

	struct gpio_desc *gpio_pa;





	struct snd_dmaengine_dai_dma_data	capture_dma_data;

	struct snd_dmaengine_dai_dma_data	capture_dma_data;

	struct snd_dmaengine_dai_dma_data	playback_dma_data;

	struct snd_dmaengine_dai_dma_data	playback_dma_data;
@@ -709,6 +711,26 @@ static struct snd_soc_dai_link *sun4i_codec_create_link(struct device *dev, 
	return link;

	return link;

};

};





static int sun4i_codec_spk_event(struct snd_soc_dapm_widget *w,

				 struct snd_kcontrol *k, int event)

{

	struct sun4i_codec *scodec = snd_soc_card_get_drvdata(w->dapm->card);



	if (scodec->gpio_pa)

		gpiod_set_value_cansleep(scodec->gpio_pa,

					 !!SND_SOC_DAPM_EVENT_ON(event));



	return 0;

}



static const struct snd_soc_dapm_widget sun4i_codec_card_dapm_widgets[] = {

	SND_SOC_DAPM_SPK("Speaker", sun4i_codec_spk_event),

};



static const struct snd_soc_dapm_route sun4i_codec_card_dapm_routes[] = {

	{ "Speaker", NULL, "Power Amplifier" },

};



static struct snd_soc_card *sun4i_codec_create_card(struct device *dev)

static struct snd_soc_card *sun4i_codec_create_card(struct device *dev)

{

{

	struct snd_soc_card *card;

	struct snd_soc_card *card;
@@ -723,6 +745,10 @@ static struct snd_soc_card *sun4i_codec_create_card(struct device *dev) 




	card->dev		= dev;

	card->dev		= dev;

	card->name		= "sun4i-codec";

	card->name		= "sun4i-codec";

	card->dapm_widgets	= sun4i_codec_card_dapm_widgets;

	card->num_dapm_widgets	= ARRAY_SIZE(sun4i_codec_card_dapm_widgets);

	card->dapm_routes	= sun4i_codec_card_dapm_routes;

	card->num_dapm_routes	= ARRAY_SIZE(sun4i_codec_card_dapm_routes);





	return card;

	return card;

};

};
@@ -774,6 +800,15 @@ static int sun4i_codec_probe(struct platform_device *pdev) 
		return -EINVAL;

		return -EINVAL;

	}

	}





	scodec->gpio_pa = devm_gpiod_get_optional(&pdev->dev, "allwinner,pa",

						  GPIOD_OUT_LOW);

	if (IS_ERR(scodec->gpio_pa)) {

		ret = PTR_ERR(scodec->gpio_pa);

		if (ret != -EPROBE_DEFER)

			dev_err(&pdev->dev, "Failed to get pa gpio: %d\n", ret);

		return ret;

	}



	/* DMA configuration for TX FIFO */

	/* DMA configuration for TX FIFO */

	scodec->playback_dma_data.addr = res->start + SUN4I_CODEC_DAC_TXDATA;

	scodec->playback_dma_data.addr = res->start + SUN4I_CODEC_DAC_TXDATA;

	scodec->playback_dma_data.maxburst = 4;

	scodec->playback_dma_data.maxburst = 4;