diff options
| author | Brian Masney <masneyb@onstation.org> | 2016-11-03 08:56:15 -0400 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-11-06 11:51:17 +0000 |
| commit | babe444798ebfe02f2e870322927c7018957c7f3 (patch) | |
| tree | 5f0c36b221c3399558bd851c75f36a604e967179 /drivers/staging/iio | |
| parent | 4a0f36144c2504313f62cad31564e405ebbbb47b (diff) | |
| download | blackbird-op-linux-babe444798ebfe02f2e870322927c7018957c7f3.tar.gz blackbird-op-linux-babe444798ebfe02f2e870322927c7018957c7f3.zip | |
staging: iio: tsl2583: remove redundant power off sequence in taos_chip_on()
taos_chip_on() explicitly turns the sensor power on and then writes the
8 registers that are stored in taos_config. The first register in
taos_config is the CONTROL register and the configuration is set to
turn the power off. The existing state sequence in taos_chip_on() is:
- Turn device power on
- Turn device power off (via taos_config)
- Configure other 7 registers (via taos_config)
- Turn device power on, enable ADC
This patch changes the code so that the device is not powered off via
taos_config.
Verified that the driver still functions correctly using a TSL2581
hooked up to a Raspberry Pi 2.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/staging/iio')
| -rw-r--r-- | drivers/staging/iio/light/tsl2583.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c index 709f44662a9f..7fb09c641822 100644 --- a/drivers/staging/iio/light/tsl2583.c +++ b/drivers/staging/iio/light/tsl2583.c @@ -410,17 +410,8 @@ static int taos_chip_on(struct iio_dev *indio_dev) chip->als_saturation = als_count * 922; /* 90% of full scale */ chip->als_time_scale = (als_time + 25) / 50; - /* - * TSL258x Specific power-on / adc enable sequence - * Power on the device 1st. - */ - utmp = TSL258X_CNTL_PWR_ON; - ret = i2c_smbus_write_byte_data(chip->client, - TSL258X_CMD_REG | TSL258X_CNTRL, utmp); - if (ret < 0) { - dev_err(&chip->client->dev, "taos_chip_on failed on CNTRL reg.\n"); - return ret; - } + /* Power on the device; ADC off. */ + chip->taos_config[TSL258X_CNTRL] = TSL258X_CNTL_PWR_ON; /* * Use the following shadow copy for our delay before enabling ADC. |
