Re: [PATCH v5 8/8] iio: adc: adi-axi-adc: move to backend framework

[Jonathan Cameron <Jonathan.Cameron@Huawei.com>]

On Fri, 12 Jan 2024 17:40:22 +0100
Nuno Sa via B4 Relay <devnull+nuno.sa.analog.com@kernel.org> wrote:

> From: Nuno Sa <nuno.sa@analog.com>
> 
> Move to the IIO backend framework. Devices supported by adi-axi-adc now
> register themselves as backend devices.
> 
> Signed-off-by: Nuno Sa <nuno.sa@analog.com>

A few quick drive by comments whist I wait for a build to finish...

> diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
> index 0f21d1d98b9f..741b53c25bb1 100644
> --- a/drivers/iio/adc/adi-axi-adc.c
> +++ b/drivers/iio/adc/adi-axi-adc.c
> @@ -8,6 +8,7 @@
>>  static int adi_axi_adc_probe(struct platform_device *pdev)
>  {
...

> @@ -390,37 +205,23 @@ static int adi_axi_adc_probe(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> -	if (cl->info->version > ver) {
> +	if (*expected_ver > ver) {
>  		dev_err(&pdev->dev,
>  			"IP core version is too old. Expected %d.%.2d.%c, Reported %d.%.2d.%c\n",

Format doesn't match with later.

> -			ADI_AXI_PCORE_VER_MAJOR(cl->info->version),
> -			ADI_AXI_PCORE_VER_MINOR(cl->info->version),
> -			ADI_AXI_PCORE_VER_PATCH(cl->info->version),
> +			ADI_AXI_PCORE_VER_MAJOR(*expected_ver),
> +			ADI_AXI_PCORE_VER_MINOR(*expected_ver),
> +			ADI_AXI_PCORE_VER_PATCH(*expected_ver),
>  			ADI_AXI_PCORE_VER_MAJOR(ver),
>  			ADI_AXI_PCORE_VER_MINOR(ver),
>  			ADI_AXI_PCORE_VER_PATCH(ver));
>  		return -ENODEV;
>  	}
>  
> -	indio_dev->info = &adi_axi_adc_info;
> -	indio_dev->name = "adi-axi-adc";
> -	indio_dev->modes = INDIO_DIRECT_MODE;
> -	indio_dev->num_channels = conv->chip_info->num_channels;
> -	indio_dev->channels = conv->chip_info->channels;
> -
> -	ret = adi_axi_adc_config_dma_buffer(&pdev->dev, indio_dev);
> +	ret = devm_iio_backend_register(&pdev->dev, &adi_axi_adc_generic, st);
>  	if (ret)
>  		return ret;
>  
> -	ret = adi_axi_adc_setup_channels(&pdev->dev, st);
> -	if (ret)
> -		return ret;
> -
> -	ret = devm_iio_device_register(&pdev->dev, indio_dev);
> -	if (ret)
> -		return ret;
> -
> -	dev_info(&pdev->dev, "AXI ADC IP core (%d.%.2d.%c) probed\n",
> +	dev_info(&pdev->dev, "AXI ADC IP core (%d.%.2d.%d) probed\n",
I'd rip this (I think) unrelated change out to reduce noise in here somewhat.
I'm curious though as it's still %c above.


>  		 ADI_AXI_PCORE_VER_MAJOR(ver),
>  		 ADI_AXI_PCORE_VER_MINOR(ver),
>  		 ADI_AXI_PCORE_VER_PATCH(ver));
> @@ -428,6 +229,8 @@ static int adi_axi_adc_probe(struct platform_device *pdev)
>  	return 0;
>  }