diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-07-29 16:27:18 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-08-02 16:10:38 +0900 |
| commit | eaefb38f344d12321cd5372d1c8ad35d264d1b35 (patch) | |
| tree | 4f3c887f9262f7a31788119e54b497f32db7b22d /sound/soc/codecs/wm1250-ev1.c | |
| parent | c56c5d08e121d103adc026df112ed11ee3a8d1d1 (diff) | |
| download | linux-stable-eaefb38f344d12321cd5372d1c8ad35d264d1b35.tar.gz linux-stable-eaefb38f344d12321cd5372d1c8ad35d264d1b35.tar.bz2 linux-stable-eaefb38f344d12321cd5372d1c8ad35d264d1b35.zip | |
ASoC: Parse board ID/revision information from WM1250-EV1 board
The WM1250-EV1 board has an ID chip on it, check the board ID and display
the board revision during startup.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Diffstat (limited to 'sound/soc/codecs/wm1250-ev1.c')
| -rw-r--r-- | sound/soc/codecs/wm1250-ev1.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/sound/soc/codecs/wm1250-ev1.c b/sound/soc/codecs/wm1250-ev1.c index bcc208967917..bbcf9ec34759 100644 --- a/sound/soc/codecs/wm1250-ev1.c +++ b/sound/soc/codecs/wm1250-ev1.c @@ -56,8 +56,26 @@ static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = { }; static int __devinit wm1250_ev1_probe(struct i2c_client *i2c, - const struct i2c_device_id *id) + const struct i2c_device_id *i2c_id) { + int ret, id, board, rev; + + board = i2c_smbus_read_byte_data(i2c, 0); + if (board < 0) { + dev_err(&i2c->dev, "Failed to read ID: %d\n", ret); + return ret; + } + + id = (board & 0xfe) >> 2; + rev = board & 0x3; + + if (id != 1) { + dev_err(&i2c->dev, "Unknown board ID %d\n", id); + return -ENODEV; + } + + dev_info(&i2c->dev, "revision %d\n", rev); + return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1, &wm1250_ev1_dai, 1); } |