On Sat, 3 Mar 2018 20:49:34 -0500
Brian Masney <masneyb@xxxxxxxxxxxxx> wrote:
> 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 <masneyb@xxxxxxxxxxxxx>
Hmm. These are getting a bit marginal in benefit but this one just makes
it over the barrier.
The reduction in complexity is really very small...
Applied.
Jonathan
> ---
> 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);
> }
>
> /**
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