[PATCH v5 05/10] iio: adc: sun20i-gpadc: Use adc-helpers

[Jonathan Cameron]

On Mon, 3 Mar 2025 13:33:02 +0200
Matti Vaittinen <mazziesaccount at gmail.com> wrote:

> The new devm_iio_adc_device_alloc_chaninfo() -helper is intended to help
> drivers avoid open-coding the for_each_node -loop for getting the
> channel IDs. The helper provides standard way to detect the ADC channel
> nodes (by the node name), and a standard way to convert the "reg"
> -propereties to channel identification numbers, used in the struct

same typo.

> iio_chan_spec. Furthermore, the helper can optionally check the found
> channel IDs are smaller than given maximum. This is useful for callers
> which later use the IDs for example for indexing a channel data array.
> 
> The original driver treated all found child nodes as channel nodes. The
> new helper requires channel nodes to be named channel[@N]. This should
> help avoid problems with devices which may contain also other but ADC
> child nodes. Quick grep from arch/* with the sun20i-gpadc's compatible
> string didn't reveal any in-tree .dts with channel nodes named
> otherwise. Also, same grep shows all the in-tree .dts seem to have
> channel IDs between 0..num of channels.
> 
> Use the new helper.
> 
> Signed-off-by: Matti Vaittinen <mazziesaccount at gmail.com>
> 
Otherwise LGTM