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| author | Peter Meerwald <pmeerw@pmeerw.net> | 2014-12-06 05:54:00 +0000 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2014-07-13 21:57:09 +0100 |
| commit | 89ca79afe50e9e9608ad3315bf099fdbb82c4eb5 (patch) | |
| tree | 7ad78e12ebda34b5c25de1703c31776afd0dadb0 /drivers/iio/adc/ad799x.c | |
| parent | ef0bf6f82d4bc2edaa88eaf679b5acc355f27037 (diff) | |
| download | blackbird-op-linux-89ca79afe50e9e9608ad3315bf099fdbb82c4eb5.tar.gz blackbird-op-linux-89ca79afe50e9e9608ad3315bf099fdbb82c4eb5.zip | |
iio:adc:ad799x: Add helper function to read/write config register
16-bit on ad7997/ad7998, 8-bit elsewhere
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/adc/ad799x.c')
| -rw-r--r-- | drivers/iio/adc/ad799x.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c index 92401c958ea2..fe2a9b1170b0 100644 --- a/drivers/iio/adc/ad799x.c +++ b/drivers/iio/adc/ad799x.c @@ -136,6 +136,30 @@ struct ad799x_state { unsigned int transfer_size; }; +static int ad799x_write_config(struct ad799x_state *st, u16 val) +{ + switch (st->id) { + case ad7997: + case ad7998: + return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG, + val); + default: + return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG, + val); + } +} + +static int ad799x_read_config(struct ad799x_state *st) +{ + switch (st->id) { + case ad7997: + case ad7998: + return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG); + default: + return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG); + } +} + /** * ad799x_trigger_handler() bh of trigger launched polling to ring buffer * |
