Re: [PATCH V4 5/8] backlight: qcom-wled: Restructure the driver for WLED3

Bjorn Andersson
2018-08-07T05:37:05Z

On Mon 09 Jul 03:22 PDT 2018, Kiran Gunda wrote:
> diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
[..]
> @@ -365,6 +434,15 @@ static int wled_configure(struct wled *wled, struct device *dev)
>
> cfg->num_strings = cfg->num_strings + 1;
>
> + string_len = of_property_count_elems_of_size(dev->of_node,
> + "qcom,enabled-strings",
> + sizeof(u32));
> + if (string_len > 0)
> + rc = of_property_read_u32_array(dev->of_node,
> + "qcom,enabled-strings",
> + wled->cfg.enabled_strings,

qcom,enabled-strings is listed as optional, but without it we will end
up with qcom,num-strings zeros in an array. Initialize
wled->cfg.enabled_strings to 0,1,2,3 and the driver will be backwards
compatible.

I also think that if you do qcom,enabled-strings = <0, 1, 2>; there's no
need to also specify qcom,num-strings = <3>; and we can just use
string_len for num_strings.

> + sizeof(u32));
> +
> return 0;
> }

Regards,
Bjorn