diff options
Diffstat (limited to 'drivers/staging/iio/imu/adis16400_core.c')
-rw-r--r-- | drivers/staging/iio/imu/adis16400_core.c | 84 |
1 files changed, 20 insertions, 64 deletions
diff --git a/drivers/staging/iio/imu/adis16400_core.c b/drivers/staging/iio/imu/adis16400_core.c index 8957985..a668a90 100644 --- a/drivers/staging/iio/imu/adis16400_core.c +++ b/drivers/staging/iio/imu/adis16400_core.c @@ -36,6 +36,8 @@ #define DRIVER_NAME "adis16400" +static int adis16400_check_status(struct device *dev); + /* At the moment the spi framework doesn't allow global setting of cs_change. * It's in the likely to be added comment at the top of spi.h. * This means that use cannot be made of spi_write etc. @@ -161,54 +163,6 @@ error_ret: return ret; } -/** - * adis16400_spi_read_burst() - read all data registers - * @dev: device associated with child of actual device (iio_dev or iio_trig) - * @rx: somewhere to pass back the value read (min size is 24 bytes) - **/ -int adis16400_spi_read_burst(struct device *dev, u8 *rx) -{ - struct spi_message msg; - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct adis16400_state *st = iio_dev_get_devdata(indio_dev); - u32 old_speed_hz = st->us->max_speed_hz; - int ret; - - struct spi_transfer xfers[] = { - { - .tx_buf = st->tx, - .bits_per_word = 8, - .len = 2, - .cs_change = 0, - }, { - .rx_buf = rx, - .bits_per_word = 8, - .len = 24, - .cs_change = 1, - }, - }; - - mutex_lock(&st->buf_lock); - st->tx[0] = ADIS16400_READ_REG(ADIS16400_GLOB_CMD); - st->tx[1] = 0; - - spi_message_init(&msg); - spi_message_add_tail(&xfers[0], &msg); - spi_message_add_tail(&xfers[1], &msg); - - st->us->max_speed_hz = min(ADIS16400_SPI_BURST, old_speed_hz); - spi_setup(st->us); - - ret = spi_sync(st->us, &msg); - if (ret) - dev_err(&st->us->dev, "problem when burst reading"); - - st->us->max_speed_hz = old_speed_hz; - spi_setup(st->us); - mutex_unlock(&st->buf_lock); - return ret; -} - static ssize_t adis16400_spi_read_signed(struct device *dev, struct device_attribute *attr, char *buf, @@ -277,7 +231,6 @@ static ssize_t adis16400_read_12bit_signed(struct device *dev, return ret; } - static ssize_t adis16400_write_16bit(struct device *dev, struct device_attribute *attr, const char *buf, @@ -349,6 +302,18 @@ static ssize_t adis16400_write_frequency(struct device *dev, return ret ? ret : len; } +static int adis16400_reset(struct device *dev) +{ + int ret; + ret = adis16400_spi_write_reg_8(dev, + ADIS16400_GLOB_CMD, + ADIS16400_GLOB_CMD_SW_RESET); + if (ret) + dev_err(dev, "problem resetting device"); + + return ret; +} + static ssize_t adis16400_write_reset(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) @@ -364,8 +329,6 @@ static ssize_t adis16400_write_reset(struct device *dev, return -1; } - - int adis16400_set_irq(struct device *dev, bool enable) { int ret; @@ -388,18 +351,6 @@ error_ret: return ret; } -int adis16400_reset(struct device *dev) -{ - int ret; - ret = adis16400_spi_write_reg_8(dev, - ADIS16400_GLOB_CMD, - ADIS16400_GLOB_CMD_SW_RESET); - if (ret) - dev_err(dev, "problem resetting device"); - - return ret; -} - /* Power down the device */ static int adis16400_stop_device(struct device *dev) { @@ -430,7 +381,7 @@ err_ret: return ret; } -int adis16400_check_status(struct device *dev) +static int adis16400_check_status(struct device *dev) { u16 status; int ret; @@ -496,6 +447,11 @@ static int adis16400_initial_setup(struct adis16400_state *st) } /* Do self test */ + ret = adis16400_self_test(dev); + if (ret) { + dev_err(dev, "self test failure"); + goto err_ret; + } /* Read status register to check the result */ ret = adis16400_check_status(dev); |