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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-07-29 19:27:18 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-08-02 11:10:38 +0400
commiteaefb38f344d12321cd5372d1c8ad35d264d1b35 (patch)
tree4f3c887f9262f7a31788119e54b497f32db7b22d /sound/soc/codecs/wm1250-ev1.c
parentc56c5d08e121d103adc026df112ed11ee3a8d1d1 (diff)
downloadlinux-eaefb38f344d12321cd5372d1c8ad35d264d1b35.tar.xz
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.c20
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);
}