On Mon, 2025-04-07 at 10:52 +0200, Angelo Dureghello wrote:
> From: Angelo Dureghello <adureghello@baylibre.com>
>
> Add data source getter.
>
> Signed-off-by: Angelo Dureghello <adureghello@baylibre.com>
> ---
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
> drivers/iio/dac/adi-axi-dac.c | 30 ++++++++++++++++++++++++++++++
> 1 file changed, 30 insertions(+)
>
> diff --git a/drivers/iio/dac/adi-axi-dac.c b/drivers/iio/dac/adi-axi-dac.c
> index
> f86acb98b0cffb09bf4d4626f932bf1edc911e2b..8ed5ad1fa24cef649056bc5f4ca80abbf28b
> 9323 100644
> --- a/drivers/iio/dac/adi-axi-dac.c
> +++ b/drivers/iio/dac/adi-axi-dac.c
> @@ -536,6 +536,35 @@ static int axi_dac_data_source_set(struct iio_backend
> *back, unsigned int chan,
> }
> }
>
> +static int axi_dac_data_source_get(struct iio_backend *back, unsigned int
> chan,
> + enum iio_backend_data_source *data)
> +{
> + struct axi_dac_state *st = iio_backend_get_priv(back);
> + int ret;
> + u32 val;
> +
> + if (chan > AXI_DAC_CHAN_CNTRL_MAX)
> + return -EINVAL;
> +
> + ret = regmap_read(st->regmap, AXI_DAC_CHAN_CNTRL_7_REG(chan), &val);
> + if (ret)
> + return ret;
> +
> + switch (val) {
> + case AXI_DAC_DATA_INTERNAL_TONE:
> + *data = IIO_BACKEND_INTERNAL_CONTINUOUS_WAVE;
> + return 0;
> + case AXI_DAC_DATA_DMA:
> + *data = IIO_BACKEND_EXTERNAL;
> + return 0;
> + case AXI_DAC_DATA_INTERNAL_RAMP_16BIT:
> + *data = IIO_BACKEND_INTERNAL_RAMP_16BIT;
> + return 0;
> + default:
> + return -EIO;
> + }
> +}
> +
> static int axi_dac_set_sample_rate(struct iio_backend *back, unsigned int
> chan,
> u64 sample_rate)
> {
> @@ -818,6 +847,7 @@ static const struct iio_backend_ops axi_ad3552r_ops = {
> .request_buffer = axi_dac_request_buffer,
> .free_buffer = axi_dac_free_buffer,
> .data_source_set = axi_dac_data_source_set,
> + .data_source_get = axi_dac_data_source_get,
> .ddr_enable = axi_dac_ddr_enable,
> .ddr_disable = axi_dac_ddr_disable,
> .data_stream_enable = axi_dac_data_stream_enable,