linux-kernel - Re: [PATCH v3 4/5] iio: dac: adi-axi-dac: add data source get

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Message-ID: <b0c6eb83a052fe6e1656d47e118b1e70336e38d1.camel@gmail.com>
Date: Mon, 07 Apr 2025 17:13:43 +0100
From: Nuno Sá <noname.nuno@...il.com>
To: Angelo Dureghello <adureghello@...libre.com>, Nuno Sá
	 <nuno.sa@...log.com>, Jonathan Cameron <jic23@...nel.org>, Lars-Peter
 Clausen	 <lars@...afoo.de>, Jonathan Corbet <corbet@....net>, Olivier
 Moysan	 <olivier.moysan@...s.st.com>, Michael Hennerich
 <Michael.Hennerich@...log.com>
Cc: linux-iio@...r.kernel.org, linux-doc@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/5] iio: dac: adi-axi-dac: add data source get

On Mon, 2025-04-07 at 10:52 +0200, Angelo Dureghello wrote:
> From: Angelo Dureghello <adureghello@...libre.com>
> 
> Add data source getter.
> 
> Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
> ---

Reviewed-by: Nuno Sá <nuno.sa@...log.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,