diff options
Diffstat (limited to 'drivers/staging/iio/cdc/ad7746.c')
| -rw-r--r-- | drivers/staging/iio/cdc/ad7746.c | 49 |
1 files changed, 16 insertions, 33 deletions
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c index e6e9eaa9eab5..2c5d27784ed3 100644 --- a/drivers/staging/iio/cdc/ad7746.c +++ b/drivers/staging/iio/cdc/ad7746.c @@ -27,11 +27,7 @@ #define AD7746_REG_STATUS 0 #define AD7746_REG_CAP_DATA_HIGH 1 -#define AD7746_REG_CAP_DATA_MID 2 -#define AD7746_REG_CAP_DATA_LOW 3 #define AD7746_REG_VT_DATA_HIGH 4 -#define AD7746_REG_VT_DATA_MID 5 -#define AD7746_REG_VT_DATA_LOW 6 #define AD7746_REG_CAP_SETUP 7 #define AD7746_REG_VT_SETUP 8 #define AD7746_REG_EXC_SETUP 9 @@ -39,17 +35,14 @@ #define AD7746_REG_CAPDACA 11 #define AD7746_REG_CAPDACB 12 #define AD7746_REG_CAP_OFFH 13 -#define AD7746_REG_CAP_OFFL 14 #define AD7746_REG_CAP_GAINH 15 -#define AD7746_REG_CAP_GAINL 16 #define AD7746_REG_VOLT_GAINH 17 -#define AD7746_REG_VOLT_GAINL 18 /* Status Register Bit Designations (AD7746_REG_STATUS) */ -#define AD7746_STATUS_EXCERR (1 << 3) -#define AD7746_STATUS_RDY (1 << 2) -#define AD7746_STATUS_RDYVT (1 << 1) -#define AD7746_STATUS_RDYCAP (1 << 0) +#define AD7746_STATUS_EXCERR BIT(3) +#define AD7746_STATUS_RDY BIT(2) +#define AD7746_STATUS_RDYVT BIT(1) +#define AD7746_STATUS_RDYCAP BIT(0) /* Capacitive Channel Setup Register Bit Designations (AD7746_REG_CAP_SETUP) */ #define AD7746_CAPSETUP_CAPEN (1 << 7) @@ -68,12 +61,12 @@ #define AD7746_VTSETUP_VTCHOP (1 << 0) /* Excitation Setup Register Bit Designations (AD7746_REG_EXC_SETUP) */ -#define AD7746_EXCSETUP_CLKCTRL (1 << 7) -#define AD7746_EXCSETUP_EXCON (1 << 6) -#define AD7746_EXCSETUP_EXCB (1 << 5) -#define AD7746_EXCSETUP_NEXCB (1 << 4) -#define AD7746_EXCSETUP_EXCA (1 << 3) -#define AD7746_EXCSETUP_NEXCA (1 << 2) +#define AD7746_EXCSETUP_CLKCTRL BIT(7) +#define AD7746_EXCSETUP_EXCON BIT(6) +#define AD7746_EXCSETUP_EXCB BIT(5) +#define AD7746_EXCSETUP_NEXCB BIT(4) +#define AD7746_EXCSETUP_EXCA BIT(3) +#define AD7746_EXCSETUP_NEXCA BIT(2) #define AD7746_EXCSETUP_EXCLVL(x) (((x) & 0x3) << 0) /* Config Register Bit Designations (AD7746_REG_CFG) */ @@ -528,10 +521,11 @@ static int ad7746_write_raw(struct iio_dev *indio_dev, goto out; } - /* CAPDAC Scale = 21pF_typ / 127 + /* + * CAPDAC Scale = 21pF_typ / 127 * CIN Scale = 8.192pF / 2^24 * Offset Scale = CAPDAC Scale / CIN Scale = 338646 - * */ + */ val /= 338646; @@ -600,7 +594,8 @@ static int ad7746_read_raw(struct iio_dev *indio_dev, switch (chan->type) { case IIO_TEMP: - /* temperature in milli degrees Celsius + /* + * temperature in milli degrees Celsius * T = ((*val / 2048) - 4096) * 1000 */ *val = (*val * 125) / 256; @@ -749,21 +744,10 @@ static int ad7746_probe(struct i2c_client *client, if (ret < 0) return ret; - ret = iio_device_register(indio_dev); + ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev); if (ret) return ret; - dev_info(&client->dev, "%s capacitive sensor registered\n", id->name); - - return 0; -} - -static int ad7746_remove(struct i2c_client *client) -{ - struct iio_dev *indio_dev = i2c_get_clientdata(client); - - iio_device_unregister(indio_dev); - return 0; } @@ -781,7 +765,6 @@ static struct i2c_driver ad7746_driver = { .name = KBUILD_MODNAME, }, .probe = ad7746_probe, - .remove = ad7746_remove, .id_table = ad7746_id, }; module_i2c_driver(ad7746_driver); |