| Message ID | 20191002123025.21413-2-miquel.raynal@bootlin.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce max12xx ADC support | expand |
diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c index 214883458582..6cdfe9ef73fc 100644 --- a/drivers/iio/adc/max1027.c +++ b/drivers/iio/adc/max1027.c @@ -309,8 +309,11 @@ static int max1027_debugfs_reg_access(struct iio_dev *indio_dev, struct max1027_state *st = iio_priv(indio_dev); u8 *val = (u8 *)st->buffer; - if (readval != NULL) - return -EINVAL; + if (readval) { + int ret = spi_read(st->spi, val, 2); + *readval = be16_to_cpu(st->buffer[0]); + return ret; + } *val = (u8)writeval; return spi_write(st->spi, val, 1);
Until now, only write operations were supported. Force two bytes read operation when reading from this register (might be wrong when reading the temperature, but will work with any other value). Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- drivers/iio/adc/max1027.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)