Add direct register access support for AD7091R-2/-4/-5/-8 ADCs.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
---
 drivers/iio/adc/ad7091r-base.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
index dbc60ea1bafc..4d5051316428 100644
--- a/drivers/iio/adc/ad7091r-base.c
+++ b/drivers/iio/adc/ad7091r-base.c
@@ -177,8 +177,20 @@ static int ad7091r_read_raw(struct iio_dev *iio_dev,
 	return ret;
 }
 
+static int ad7091r_reg_access(struct iio_dev *indio_dev, unsigned int reg,
+			      unsigned int writeval, unsigned int *readval)
+{
+	struct ad7091r_state *st  = iio_priv(indio_dev);
+
+	if (readval)
+		return regmap_read(st->map, reg, readval);
+
+	return regmap_write(st->map, reg, writeval);
+}
+
 static const struct iio_info ad7091r_info = {
 	.read_raw = ad7091r_read_raw,
+	.debugfs_reg_access = &ad7091r_reg_access,
 };
 
 static irqreturn_t ad7091r_event_handler(int irq, void *private)
-- 
2.42.0

On Thu, 23 Nov 2023 13:43:06 -0300
Marcelo Schmitt <marcelo.schmitt@analog.com> wrote:

> Add direct register access support for AD7091R-2/-4/-5/-8 ADCs.
> 
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>

regmap provides it's own version of this, so I'm not sure I'd bother adding
the IIO one. See regmap-debugfs.c


> ---
>  drivers/iio/adc/ad7091r-base.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
> index dbc60ea1bafc..4d5051316428 100644
> --- a/drivers/iio/adc/ad7091r-base.c
> +++ b/drivers/iio/adc/ad7091r-base.c
> @@ -177,8 +177,20 @@ static int ad7091r_read_raw(struct iio_dev *iio_dev,
>  	return ret;
>  }
>  
> +static int ad7091r_reg_access(struct iio_dev *indio_dev, unsigned int reg,
> +			      unsigned int writeval, unsigned int *readval)
> +{
> +	struct ad7091r_state *st  = iio_priv(indio_dev);
> +
> +	if (readval)
> +		return regmap_read(st->map, reg, readval);
> +
> +	return regmap_write(st->map, reg, writeval);
> +}
> +
>  static const struct iio_info ad7091r_info = {
>  	.read_raw = ad7091r_read_raw,
> +	.debugfs_reg_access = &ad7091r_reg_access,
>  };
>  
>  static irqreturn_t ad7091r_event_handler(int irq, void *private)