Mike Looijmans wrote on 26.11.2014 12:51:
> Tested it on the Miami board, and this patch indeed fixes the issue. You can
> add my tested-by if you like:
>
> Tested-by: Mike Looijmans <mike.looijmans@xxxxxxxx>
Acked-by: Hartmut Knaack <knaack.h@xxxxxx>
>
>
> On 11/26/2014 11:35 AM, Lars-Peter Clausen wrote:
>> 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@xxxxxxxxxx>
>> ---
>> drivers/iio/adc/ad799x.c | 15 +++++++++++++--
>> 1 file changed, 13 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
>> index e37412d..b99de00 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;
>> }
>> }
>>
>>
>
>
>
> Met vriendelijke groet / kind regards,
>
> Mike Looijmans
> System Expert
>
>
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