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| author | Lars-Peter Clausen <lars@metafoo.de> | 2014-11-26 11:35:35 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2014-12-12 12:34:00 +0000 |
| commit | 2eacc608b3bf3519fc353c558454873f4589146d (patch) | |
| tree | 21960185952e1a67244439dc2fb38fa98bb12d1e /drivers/iio/adc | |
| parent | 9e8e228f2bf066c37eeee7c25b810cad3235427a (diff) | |
| download | linux-stable-2eacc608b3bf3519fc353c558454873f4589146d.tar.gz linux-stable-2eacc608b3bf3519fc353c558454873f4589146d.tar.bz2 linux-stable-2eacc608b3bf3519fc353c558454873f4589146d.zip | |
iio: ad799x: Fix ad7991/ad7995/ad7999 config setup
The ad7991/ad7995/ad7999 does not have a configuration register like the
other devices that can be written and read. The configuration is written as
part of the conversion sequence.
Fixes: 0f7ddcc1bff1 ("iio:adc:ad799x: Write default config on probe and reset alert status on probe")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/ad799x.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c index e37412da15f5..b99de00e57b8 100644 --- a/drivers/iio/adc/ad799x.c +++ b/drivers/iio/adc/ad799x.c @@ -143,9 +143,15 @@ static int ad799x_write_config(struct ad799x_state *st, u16 val) case ad7998: return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG, val); - default: + case ad7992: + case ad7993: + case ad7994: return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG, val); + default: + /* Will be written when doing a conversion */ + st->config = val; + return 0; } } @@ -155,8 +161,13 @@ static int ad799x_read_config(struct ad799x_state *st) case ad7997: case ad7998: return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG); - default: + case ad7992: + case ad7993: + case ad7994: return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG); + default: + /* No readback support */ + return st->config; } } |