diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/iio/gyro/adis16080_core.c | 81 |
1 files changed, 75 insertions, 6 deletions
diff --git a/drivers/staging/iio/gyro/adis16080_core.c b/drivers/staging/iio/gyro/adis16080_core.c index 76764ba1671..098a0a18ce2 100644 --- a/drivers/staging/iio/gyro/adis16080_core.c +++ b/drivers/staging/iio/gyro/adis16080_core.c @@ -29,13 +29,20 @@ #define ADIS16080_DIN_WRITE (1 << 15) +struct adis16080_chip_info { + int scale_val; + int scale_val2; +}; + /** * struct adis16080_state - device instance specific data * @us: actual spi_device to write data + * @info: chip specific parameters * @buf: transmit or receive buffer **/ struct adis16080_state { struct spi_device *us; + const struct adis16080_chip_info *info; __be16 buf ____cacheline_aligned; }; @@ -76,6 +83,7 @@ static int adis16080_read_raw(struct iio_dev *indio_dev, int *val2, long mask) { + struct adis16080_state *st = iio_priv(indio_dev); int ret; switch (mask) { @@ -84,6 +92,40 @@ static int adis16080_read_raw(struct iio_dev *indio_dev, ret = adis16080_read_sample(indio_dev, chan->address, val); mutex_unlock(&indio_dev->mlock); return ret ? ret : IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_ANGL_VEL: + *val = st->info->scale_val; + *val2 = st->info->scale_val2; + return IIO_VAL_FRACTIONAL; + case IIO_VOLTAGE: + /* VREF = 5V, 12 bits */ + *val = 5000; + *val2 = 12; + return IIO_VAL_FRACTIONAL_LOG2; + case IIO_TEMP: + /* 85 C = 585, 25 C = 0 */ + *val = 85000 - 25000; + *val2 = 585; + return IIO_VAL_FRACTIONAL; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_OFFSET: + switch (chan->type) { + case IIO_VOLTAGE: + /* 2.5 V = 0 */ + *val = 2048; + return IIO_VAL_INT; + case IIO_TEMP: + /* 85 C = 585, 25 C = 0 */ + *val = DIV_ROUND_CLOSEST(25 * 585, 85 - 25); + return IIO_VAL_INT; + default: + return -EINVAL; + } + default: + break; } return -EINVAL; @@ -94,25 +136,32 @@ static const struct iio_chan_spec adis16080_channels[] = { .type = IIO_ANGL_VEL, .modified = 1, .channel2 = IIO_MOD_Z, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, .address = ADIS16080_DIN_GYRO, }, { .type = IIO_VOLTAGE, .indexed = 1, .channel = 0, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, .address = ADIS16080_DIN_AIN1, }, { .type = IIO_VOLTAGE, .indexed = 1, .channel = 1, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, .address = ADIS16080_DIN_AIN2, }, { .type = IIO_TEMP, .indexed = 1, .channel = 0, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | + IIO_CHAN_INFO_SCALE_SEPARATE_BIT | + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, .address = ADIS16080_DIN_TEMP, } }; @@ -122,8 +171,27 @@ static const struct iio_info adis16080_info = { .driver_module = THIS_MODULE, }; +enum { + ID_ADIS16080, + ID_ADIS16100, +}; + +static const struct adis16080_chip_info adis16080_chip_info[] = { + [ID_ADIS16080] = { + /* 80 degree = 819, 819 rad = 46925 degree */ + .scale_val = 80, + .scale_val2 = 46925, + }, + [ID_ADIS16100] = { + /* 300 degree = 1230, 1230 rad = 70474 degree */ + .scale_val = 300, + .scale_val2 = 70474, + }, +}; + static int adis16080_probe(struct spi_device *spi) { + const struct spi_device_id *id = spi_get_device_id(spi); int ret; struct adis16080_state *st; struct iio_dev *indio_dev; @@ -140,6 +208,7 @@ static int adis16080_probe(struct spi_device *spi) /* Allocate the comms buffers */ st->us = spi; + st->info = &adis16080_chip_info[id->driver_data]; indio_dev->name = spi->dev.driver->name; indio_dev->channels = adis16080_channels; @@ -169,8 +238,8 @@ static int adis16080_remove(struct spi_device *spi) } static const struct spi_device_id adis16080_ids[] = { - { "adis16080", 0 }, - { "adis16100", 0 }, + { "adis16080", ID_ADIS16080 }, + { "adis16100", ID_ADIS16100 }, {}, }; MODULE_DEVICE_TABLE(spi, adis16080_ids); |