On 11/25/2014 09:12 AM, Mike Looijmans wrote:
After this commit:
iio:adc:ad799x: Write default config on probe and reset alert status on
probe
writing ALERT_EN and BUSY_ALERT to the chip config register clears
pending alerts, BUSY_ALERT is cleared when reading back the register
The AD7999 on our board no longer functions, reading the in_voltage*_raw
sysfiles always returns "255" after this.
I reverted the commit, and that fixed the problem for me.
I suspect that there is something going wrong when reading back the config
register, can you check the attached patch and see what the output is?
Thanks,
- Lars
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
index e37412d..babbdde 100644
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -816,6 +816,8 @@ static int ad799x_probe(struct i2c_client *client,
if (ret < 0)
goto error_disable_reg;
st->config = ret;
+ dev_info(&client->dev, "config: %x %x\n", st->config,
+ st->chip_config->default_config);
ret = iio_triggered_buffer_setup(indio_dev, NULL,
&ad799x_trigger_handler, NULL);
