From: Brian Masney Date: Thu, 3 Nov 2016 12:56:17 +0000 (-0400) Subject: staging: iio: tsl2583: remove redudant i2c call in taos_als_calibrate() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c2b0d2cfb0317275cf04257fc3f5dfbdd9ffa274;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git staging: iio: tsl2583: remove redudant i2c call in taos_als_calibrate() 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 Signed-off-by: Jonathan Cameron --- diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c index af1cf9bdbd85..7eab17f4557e 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;