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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>
This commit is contained in:
Mark Brown 2011-07-29 16:27:18 +01:00
parent c56c5d08e1
commit eaefb38f34
1 changed files with 19 additions and 1 deletions
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20
sound/soc/codecs/wm1250-ev1.c
View File

@ -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);
}