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Commit b2d8957f authored by Alexander Stein's avatar Alexander Stein Committed by Takashi Iwai
Browse files

ALSA: sound/atmel/ac97c.c: Add device tree support 



This adds device tree support for the AC97 controller. It uses the
soc-ac97link bindings, but actually only ac97-reset is used.

Signed-off-by: default avatarAlexander Stein <alexanders83@web.de>
Acked-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent ff6defa6

sound/atmel/ac97c.c

+42 −3
Original line number Original line Diff line number Diff line
@@ -22,6 +22,9 @@ 
#include <linux/gpio.h>

#include <linux/gpio.h>

#include <linux/types.h>

#include <linux/types.h>

#include <linux/io.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/of_gpio.h>

#include <linux/of_device.h>





#include <sound/core.h>

#include <sound/core.h>

#include <sound/initval.h>

#include <sound/initval.h>
@@ -902,6 +905,40 @@ static void atmel_ac97c_reset(struct atmel_ac97c *chip) 
	}

	}

}

}





#ifdef CONFIG_OF

static const struct of_device_id atmel_ac97c_dt_ids[] = {

	{ .compatible = "atmel,at91sam9263-ac97c", },

	{ }

};

MODULE_DEVICE_TABLE(of, atmel_ac97c_dt_ids);



static struct ac97c_platform_data *atmel_ac97c_probe_dt(struct device *dev)

{

	struct ac97c_platform_data *pdata;

	struct device_node *node = dev->of_node;

	const struct of_device_id *match;



	if (!node) {

		dev_err(dev, "Device does not have associated DT data\n");

		return ERR_PTR(-EINVAL);

	}



	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata)

		return ERR_PTR(-ENOMEM);



	pdata->reset_pin = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);



	return pdata;

}

#else

static struct ac97c_platform_data *atmel_ac97c_probe_dt(struct device *dev)

{

	dev_err(dev, "no platform data defined\n");

	return ERR_PTR(-ENXIO);

}

#endif



static int atmel_ac97c_probe(struct platform_device *pdev)

static int atmel_ac97c_probe(struct platform_device *pdev)

{

{

	struct snd_card			*card;

	struct snd_card			*card;
@@ -922,10 +959,11 @@ static int atmel_ac97c_probe(struct platform_device *pdev) 
		return -ENXIO;

		return -ENXIO;

	}

	}





	pdata = pdev->dev.platform_data;

	pdata = dev_get_platdata(&pdev->dev);

	if (!pdata) {

	if (!pdata) {

		dev_dbg(&pdev->dev, "no platform data\n");

		pdata = atmel_ac97c_probe_dt(&pdev->dev);

		return -ENXIO;

		if (IS_ERR(pdata))

			return PTR_ERR(pdata);

	}

	}





	irq = platform_get_irq(pdev, 0);

	irq = platform_get_irq(pdev, 0);
@@ -1204,6 +1242,7 @@ static struct platform_driver atmel_ac97c_driver = { 
	.driver		= {

	.driver		= {

		.name	= "atmel_ac97c",

		.name	= "atmel_ac97c",

		.pm	= ATMEL_AC97C_PM_OPS,

		.pm	= ATMEL_AC97C_PM_OPS,

		.of_match_table = of_match_ptr(atmel_ac97c_dt_ids),

	},

	},

};

};

module_platform_driver(atmel_ac97c_driver);

module_platform_driver(atmel_ac97c_driver);