On 03/11/16 12:56, Brian Masney wrote:
> taos_als_calibrate() queries the control register to determine if the
> unit is powered on and has the ADC enabled. It then queries the same
> register a second time to determine if the ADC reading is valid. This
> patch removes the redundant i2c_smbus_read_byte_data() call.
>
> Verified that the driver still functions correctly using a TSL2581
> hooked up to a Raspberry Pi 2.
>
> Signed-off-by: Brian Masney <masneyb@xxxxxxxxxxxxx>
Applied.
Thanks,
Jonathan
> ---
> drivers/staging/iio/light/tsl2583.c | 13 +------------
> 1 file changed, 1 insertion(+), 12 deletions(-)
>
> diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
> index af1cf9b..7eab17f 100644
> --- a/drivers/staging/iio/light/tsl2583.c
> +++ b/drivers/staging/iio/light/tsl2583.c
> @@ -338,18 +338,7 @@ static int taos_als_calibrate(struct iio_dev *indio_dev)
> dev_err(&chip->client->dev,
> "taos_als_calibrate failed: device not powered on with ADC enabled\n");
> return -EINVAL;
> - }
> -
> - ret = i2c_smbus_read_byte_data(chip->client,
> - TSL258X_CMD_REG | TSL258X_CNTRL);
> - if (ret < 0) {
> - dev_err(&chip->client->dev,
> - "%s failed to read from the CNTRL register\n",
> - __func__);
> - return ret;
> - }
> -
> - if ((ret & TSL258X_STA_ADC_VALID) != TSL258X_STA_ADC_VALID) {
> + } else if ((ret & TSL258X_STA_ADC_VALID) != TSL258X_STA_ADC_VALID) {
> dev_err(&chip->client->dev,
> "taos_als_calibrate failed: STATUS - ADC not valid.\n");
> return -ENODATA;
>
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