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iio: gyro: adxrs290: Add debugfs register access support 

Extend support to read/write byte data from/to the device using
debugfs iio interface.

Signed-off-by: Nishant Malpani <nish.malpani25@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200910180450.29696-4-nish.malpani25@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Nishant Malpani 2020-09-10 23:34:50 +05:30 committed by Jonathan Cameron
parent 85434c2ab3
commit d3e0e14d65
1 changed files with 26 additions and 0 deletions
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26
drivers/iio/gyro/adxrs290.c
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@ -436,6 +436,31 @@ static int adxrs290_read_avail(struct iio_dev *indio_dev,
}
}
static int adxrs290_reg_access_rw(struct spi_device *spi, unsigned int reg,
unsigned int *readval)
{
int ret;
ret = spi_w8r8(spi, ADXRS290_READ_REG(reg));
if (ret < 0)
return ret;
*readval = ret;
return 0;
}
static int adxrs290_reg_access(struct iio_dev *indio_dev, unsigned int reg,
unsigned int writeval, unsigned int *readval)
{
struct adxrs290_state *st = iio_priv(indio_dev);
if (readval)
return adxrs290_reg_access_rw(st->spi, reg, readval);
else
return adxrs290_spi_write_reg(st->spi, reg, writeval);
}
static int adxrs290_data_rdy_trigger_set_state(struct iio_trigger *trig,
bool state)
{
@ -551,6 +576,7 @@ static const struct iio_info adxrs290_info = {
.read_raw = &adxrs290_read_raw,
.write_raw = &adxrs290_write_raw,
.read_avail = &adxrs290_read_avail,
.debugfs_reg_access = &adxrs290_reg_access,
};
static int adxrs290_probe_trigger(struct iio_dev *indio_dev)