There were four places where the same chunk of code was used to write
to the control register. This patch creates a common function
tsl2x7x_write_control_reg() to reduce duplicate code.
The function tsl2x7x_chip_off() did not correctly return an error
code so this patch also corrects that issue.
Signed-off-by: Brian Masney <masn...@onstation.org>
---
drivers/staging/iio/light/tsl2x7x.c | 54 +++++++++++++++++--------------------
1 file changed, 25 insertions(+), 29 deletions(-)
diff --git a/drivers/staging/iio/light/tsl2x7x.c
b/drivers/staging/iio/light/tsl2x7x.c
index 6bb622816660..cf16dd206c0b 100644
--- a/drivers/staging/iio/light/tsl2x7x.c
+++ b/drivers/staging/iio/light/tsl2x7x.c
@@ -307,6 +307,21 @@ static int tsl2x7x_read_status(struct tsl2X7X_chip *chip)
return ret;
}
+static int tsl2x7x_write_control_reg(struct tsl2X7X_chip *chip, u8 data)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2X7X_CMD_REG | TSL2X7X_CNTRL, data);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to write to control register %x: %d\n",
+ __func__, data, ret);
+ }
+
+ return ret;
+}
+
/**
* tsl2x7x_get_lux() - Reads and calculates current lux value.
* @indio_dev: pointer to IIO device
@@ -597,7 +612,6 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
int i;
int ret = 0;
u8 *dev_reg;
- u8 utmp;
int als_count;
int als_time;
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
@@ -659,14 +673,9 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
* TSL2X7X Specific power-on / adc enable sequence
* Power on the device 1st.
*/
- utmp = TSL2X7X_CNTL_PWR_ON;
- ret = i2c_smbus_write_byte_data(chip->client,
- TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
- if (ret < 0) {
- dev_err(&chip->client->dev,
- "%s: failed on CNTRL reg.\n", __func__);
+ ret = tsl2x7x_write_control_reg(chip, TSL2X7X_CNTL_PWR_ON);
+ if (ret < 0)
return ret;
- }
/*
* Use the following shadow copy for our delay before enabling ADC.
@@ -691,16 +700,12 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
* NOW enable the ADC
* initialize the desired mode of operation
*/
- utmp = TSL2X7X_CNTL_PWR_ON |
- TSL2X7X_CNTL_ADC_ENBL |
- TSL2X7X_CNTL_PROX_DET_ENBL;
- ret = i2c_smbus_write_byte_data(chip->client,
- TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
- if (ret < 0) {
- dev_err(&chip->client->dev,
- "%s: failed on 2nd CTRL reg.\n", __func__);
+ ret = tsl2x7x_write_control_reg(chip,
+ TSL2X7X_CNTL_PWR_ON |
+ TSL2X7X_CNTL_ADC_ENBL |
+ TSL2X7X_CNTL_PROX_DET_ENBL);
+ if (ret < 0)
return ret;
- }
chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
@@ -713,13 +718,9 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
reg_val |= chip->settings.interrupts_en;
- ret = i2c_smbus_write_byte_data(chip->client,
- TSL2X7X_CMD_REG | TSL2X7X_CNTRL,
- reg_val);
+ ret = tsl2x7x_write_control_reg(chip, reg_val);
if (ret < 0)
- dev_err(&chip->client->dev,
- "%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
- __func__);
+ return ret;
ret = tsl2x7x_clear_interrupts(chip,
TSL2X7X_CMD_PROXALS_INT_CLR);
@@ -732,16 +733,11 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
{
- int ret;
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
/* turn device off */
chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
-
- ret = i2c_smbus_write_byte_data(chip->client,
- TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
-
- return ret;
+ return tsl2x7x_write_control_reg(chip, 0x00);
}
/**
--
2.14.3
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