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SubjectRe: [PATCH v3 04/11] leds: aw200xx: calculate dts property display_rows in the driver
On Wed, Nov 1, 2023 at 4:24 PM Dmitry Rokosov
<ddrokosov@salutedevices.com> wrote:
>
> From: George Stark <gnstark@salutedevices.com>
>
> Get rid of device tree property "awinic,display-rows". The property
> value actually means number of current switches and depends on how leds
> are connected to the device. It should be calculated manually by max
> used led number. In the same way it is computed automatically now.
> Max used led is taken from led definition subnodes.

...

> +static bool aw200xx_probe_get_display_rows(struct device *dev, struct aw200xx *chip)
> +{
> + struct fwnode_handle *child;
> + u32 max_source = 0;
> +
> + device_for_each_child_node(dev, child) {
> + u32 source;
> + int ret;
> +
> + ret = fwnode_property_read_u32(child, "reg", &source);
> + if (ret || source >= chip->cdef->channels)
> + continue;
> +
> + max_source = max(max_source, source);
> + }

> + chip->display_rows = max_source / chip->cdef->display_size_columns + 1;
> + return !!chip->display_rows;

This is a bit weird. Can we rewrite it as

if (max_source == 0)
return false;

->display_rows = ...
return true;

?

> +}


--
With Best Regards,
Andy Shevchenko

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