diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/imu/adis16400_core.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/iio/imu/adis16400_core.c b/drivers/iio/imu/adis16400_core.c index 8551fde90563..58699ac22d02 100644 --- a/drivers/iio/imu/adis16400_core.c +++ b/drivers/iio/imu/adis16400_core.c @@ -92,18 +92,26 @@ static int adis16400_get_freq(struct adis16400_state *st) static int adis16400_set_freq(struct adis16400_state *st, unsigned int freq) { unsigned int t; + uint8_t val = 0; t = 1638404 / freq; - if (t > 0) + if (t >= 128) { + val |= ADIS16400_SMPL_PRD_TIME_BASE; + t = 52851 / freq; + if (t >= 128) + t = 127; + } else if (t != 0) { t--; - t &= ADIS16400_SMPL_PRD_DIV_MASK; + } + + val |= t; - if ((t & ADIS16400_SMPL_PRD_DIV_MASK) >= 0x0A) + if (t >= 0x0A || (val & ADIS16400_SMPL_PRD_TIME_BASE)) st->adis.spi->max_speed_hz = ADIS16400_SPI_SLOW; else st->adis.spi->max_speed_hz = ADIS16400_SPI_FAST; - return adis_write_reg_8(&st->adis, ADIS16400_SMPL_PRD, t); + return adis_write_reg_8(&st->adis, ADIS16400_SMPL_PRD, val); } static ssize_t adis16400_read_frequency(struct device *dev, |