linux-kernel - Re: [PATCH v5 2/2] leds: lm3601x: Introduce the lm3601x LED driver

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Message-ID: <CAHp75VcFR4zUOhRjNLN1nMirirVaK-WjYa5Kwa9dL__-bjnLuA@mail.gmail.com>
Date:   Mon, 14 May 2018 22:49:51 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Dan Murphy <dmurphy@...com>
Cc:     Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Pavel Machek <pavel@....cz>, "Andrew F. Davis" <afd@...com>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux LED Subsystem <linux-leds@...r.kernel.org>
Subject: Re: [PATCH v5 2/2] leds: lm3601x: Introduce the lm3601x LED driver

On Mon, May 14, 2018 at 10:40 PM, Dan Murphy <dmurphy@...com> wrote:
> On 05/11/2018 06:56 AM, Dan Murphy wrote:

>>>> +        ret = of_property_read_string(led->strobe_node, "label", &name);

>>>> +        ret = of_property_read_u32(led->strobe_node,

>>>> +        ret = of_property_read_u32(led->strobe_node,

>>> Common LED bindings state that flash-max-microamp and
>>> flash-max-timeout-us properties are mandatory.
>>
>> OK.
>
> OK I looked at the max776973 driver and well if the flash-max-microamp and
> flash-max-timeout-us nodes are missing it sets a default value for each if the
> node is not present.
>
> So should we remove this code from the Max77693 driver too and fail probe as being asked
> in this driver?

I would also add that using device_property_*() API is much better
then using OF specific one. It will help IoT / DIY entusiasts use them
on non-DT platforms.


-- 
With Best Regards,
Andy Shevchenko