[Linux-stm32] [PATCH v2] iio: adc: stm32-adc: add debug info if dt uses legacy channel config

[Jonathan Cameron]

On Fri, 21 Apr 2023 10:38:58 +0200
Sean Nyekjaer <sean at geanix.com> wrote:

> Since nearly all stm32 dt's are using the legacy adc channel config,
> we should warn users about using it.
> 
> Signed-off-by: Sean Nyekjaer <sean at geanix.com>
This is far enough (I think) from the code touched in the fixes
(I'm waiting for review from Olivier for those) that I can merge
it through a different branch.   So taken this one for the togreg branch of
iio.git - initially pushed out as testing for 0-day to take a poke at it.

Thanks,

Jonathan

> ---
> Changes since v1:
>  - Changed dev_warn -> dev_dbg
> 
>  drivers/iio/adc/stm32-adc.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
> index 1aadb2ad2cab..e179b6611e4d 100644
> --- a/drivers/iio/adc/stm32-adc.c
> +++ b/drivers/iio/adc/stm32-adc.c
> @@ -1993,6 +1993,8 @@ static int stm32_adc_get_legacy_chan_count(struct iio_dev *indio_dev, struct stm
>  	const struct stm32_adc_info *adc_info = adc->cfg->adc_info;
>  	int num_channels = 0, ret;
>  
> +	dev_dbg(&indio_dev->dev, "using legacy channel config\n");
> +
>  	ret = device_property_count_u32(dev, "st,adc-channels");
>  	if (ret > adc_info->max_channels) {
>  		dev_err(&indio_dev->dev, "Bad st,adc-channels?\n");