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staging: iio: tsl2x7x: remove tsl2x7x_i2c_read() 

tsl2x7x_i2c_read() would call i2c_smbus_write_byte() and
i2c_smbus_read_byte(). These two i2c functions can be replaced with a
single call to i2c_smbus_read_byte_data(). This patch removes the
tsl2x7x_i2c_read() function and replaces all occurrences with a call to
i2c_smbus_read_byte_data().

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Brian Masney 2017-07-06 18:56:21 -04:00 committed by Jonathan Cameron
parent 8ea6134c23
commit d2f46f56b8
1 changed files with 22 additions and 49 deletions
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71
drivers/staging/iio/light/tsl2x7x.c
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@ -284,35 +284,6 @@ static const u8 device_channel_config[] = {
ALSPRX2
};
/**
* tsl2x7x_i2c_read() - Read a byte from a register.
* @client: i2c client
* @reg: device register to read from
* @*val: pointer to location to store register contents.
*
*/
static int
tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
{
int ret;
/* select register to write */
ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
if (ret < 0) {
dev_err(&client->dev, "failed to write register %x\n", reg);
return ret;
}
/* read the data */
ret = i2c_smbus_read_byte(client);
if (ret >= 0)
*val = (u8)ret;
else
dev_err(&client->dev, "failed to read register %x\n", reg);
return ret;
}
/**
* tsl2x7x_get_lux() - Reads and calculates current lux value.
* @indio_dev: pointer to IIO device
@ -352,15 +323,15 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
goto out_unlock;
}
ret = tsl2x7x_i2c_read(chip->client,
(TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
ret = i2c_smbus_read_byte_data(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_STATUS);
if (ret < 0) {
dev_err(&chip->client->dev,
"%s: Failed to read STATUS Reg\n", __func__);
goto out_unlock;
}
/* is data new & valid */
if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
if (!(ret & TSL2X7X_STA_ADC_VALID)) {
dev_err(&chip->client->dev,
"%s: data not valid yet\n", __func__);
ret = chip->als_cur_info.lux; /* return LAST VALUE */
@ -368,14 +339,16 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
}
for (i = 0; i < 4; i++) {
ret = tsl2x7x_i2c_read(chip->client,
(TSL2X7X_CMD_REG |
(TSL2X7X_ALS_CHAN0LO + i)), &buf[i]);
int reg = TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i);
ret = i2c_smbus_read_byte_data(chip->client, reg);
if (ret < 0) {
dev_err(&chip->client->dev,
"failed to read. err=%x\n", ret);
goto out_unlock;
}
buf[i] = ret;
}
/* clear any existing interrupt status */
@ -475,7 +448,6 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
{
int i;
int ret;
u8 status;
u8 chdata[2];
struct tsl2X7X_chip *chip = iio_priv(indio_dev);
@ -485,8 +457,8 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
return -EBUSY;
}
ret = tsl2x7x_i2c_read(chip->client,
(TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
ret = i2c_smbus_read_byte_data(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_STATUS);
if (ret < 0) {
dev_err(&chip->client->dev, "i2c err=%d\n", ret);
goto prox_poll_err;
@ -498,7 +470,7 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
case tmd2671:
case tsl2771:
case tmd2771:
if (!(status & TSL2X7X_STA_ADC_VALID))
if (!(ret & TSL2X7X_STA_ADC_VALID))
goto prox_poll_err;
break;
case tsl2572:
@ -506,17 +478,19 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
case tmd2672:
case tsl2772:
case tmd2772:
if (!(status & TSL2X7X_STA_PRX_VALID))
if (!(ret & TSL2X7X_STA_PRX_VALID))
goto prox_poll_err;
break;
}
for (i = 0; i < 2; i++) {
ret = tsl2x7x_i2c_read(chip->client,
(TSL2X7X_CMD_REG |
(TSL2X7X_PRX_LO + i)), &chdata[i]);
int reg = TSL2X7X_CMD_REG | (TSL2X7X_PRX_LO + i);
ret = i2c_smbus_read_byte_data(chip->client, reg);
if (ret < 0)
goto prox_poll_err;
chdata[i] = ret;
}
chip->prox_data =
@ -1486,7 +1460,7 @@ static DEVICE_ATTR_RW(in_intensity0_thresh_period);
static DEVICE_ATTR_RW(in_proximity0_thresh_period);
/* Use the default register values to identify the Taos device */
static int tsl2x7x_device_id(unsigned char *id, int target)
static int tsl2x7x_device_id(int *id, int target)
{
switch (target) {
case tsl2571:
@ -1843,7 +1817,6 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
const struct i2c_device_id *id)
{
int ret;
unsigned char device_id;
struct iio_dev *indio_dev;
struct tsl2X7X_chip *chip;
@ -1855,13 +1828,13 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
chip->client = clientp;
i2c_set_clientdata(clientp, indio_dev);
ret = tsl2x7x_i2c_read(chip->client,
TSL2X7X_CHIPID, &device_id);
ret = i2c_smbus_read_byte_data(chip->client,
TSL2X7X_CMD_REG | TSL2X7X_CHIPID);
if (ret < 0)
return ret;
if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
(tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
if ((!tsl2x7x_device_id(&ret, id->driver_data)) ||
(tsl2x7x_device_id(&ret, id->driver_data) == -EINVAL)) {
dev_info(&chip->client->dev,
"%s: i2c device found does not match expected id\n",
__func__);