diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-12-02 18:39:17 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-12-03 11:00:10 +0000 |
| commit | 7d46a528c609418e0a61121aac75edaf4992b622 (patch) | |
| tree | ded806106d32054eaf17b440e42364e827ede758 | |
| parent | ee244ce4ea5651989229d7f287f777f68104a59a (diff) | |
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: Mark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
| -rw-r--r-- | sound/soc/codecs/wm8903.c | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c index 0b12a5525c15..a75688b5a568 100644 --- a/sound/soc/codecs/wm8903.c +++ b/sound/soc/codecs/wm8903.c @@ -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) |