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Commit 7d46a528 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Move initial WM8903 identification and reset to I2C probe 



Get control of the device earlier and avoid trying to do an ASoC probe
on a card that won't work.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: default avatarStephen Warren <swarren@nvidia.com>
parent ee244ce4

sound/soc/codecs/wm8903.c

+23 −18
Original line number Diff line number Diff line
@@ -244,11 +244,6 @@ static bool wm8903_volatile_register(struct device *dev, unsigned int reg) 
	}

}



static void wm8903_reset(struct snd_soc_codec *codec)

{

	snd_soc_write(codec, WM8903_SW_RESET_AND_ID, 0);

}



static int wm8903_cp_event(struct snd_soc_dapm_widget *w,

			   struct snd_kcontrol *kcontrol, int event)

{
@@ -1892,19 +1887,6 @@ static int wm8903_probe(struct snd_soc_codec *codec) 
		return ret;

	}



	val = snd_soc_read(codec, WM8903_SW_RESET_AND_ID);

	if (val != 0x8903) {

		dev_err(codec->dev,

			"Device with ID register %x is not a WM8903\n", val);

		return -ENODEV;

	}



	val = snd_soc_read(codec, WM8903_REVISION_NUMBER);

	dev_info(codec->dev, "WM8903 revision %c\n",

		 (val & WM8903_CHIP_REV_MASK) + 'A');



	wm8903_reset(codec);



	/* Set up GPIOs and microphone detection */

	if (pdata) {

		bool mic_gpio = false;
@@ -2058,6 +2040,7 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, 
				      const struct i2c_device_id *id)

{

	struct wm8903_priv *wm8903;

	unsigned int val;

	int ret;



	wm8903 = devm_kzalloc(&i2c->dev,  sizeof(struct wm8903_priv),
@@ -2076,6 +2059,28 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c, 
	i2c_set_clientdata(i2c, wm8903);

	wm8903->irq = i2c->irq;



	ret = regmap_read(wm8903->regmap, WM8903_SW_RESET_AND_ID, &val);

	if (ret != 0) {

		dev_err(&i2c->dev, "Failed to read chip ID: %d\n", ret);

		goto err;

	}

	if (val != 0x8903) {

		dev_err(&i2c->dev, "Device with ID %x is not a WM8903\n", val);

		ret = -ENODEV;

		goto err;

	}



	ret = regmap_read(wm8903->regmap, WM8903_REVISION_NUMBER, &val);

	if (ret != 0) {

		dev_err(&i2c->dev, "Failed to read chip revision: %d\n", ret);

		goto err;

	}

	dev_info(&i2c->dev, "WM8903 revision %c\n",

		 (val & WM8903_CHIP_REV_MASK) + 'A');



	/* Reset the device */

	regmap_write(wm8903->regmap, WM8903_SW_RESET_AND_ID, 0x8903);



	ret = snd_soc_register_codec(&i2c->dev,

			&soc_codec_dev_wm8903, &wm8903_dai, 1);

	if (ret != 0)