linux-kernel - Re: [PATCH v7 11/12] leds: Add common LED binding parsing support to LED class/core

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Message-ID: <8359b8365f6c86fe4acb9c35c2c6be55091b45a3.camel@fi.rohmeurope.com>
Date:   Mon, 30 Dec 2019 07:36:17 +0000
From:   "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>
To:     "pavel@....cz" <pavel@....cz>
CC:     "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
        "dmurphy@...com" <dmurphy@...com>,
        "linux-rtc@...r.kernel.org" <linux-rtc@...r.kernel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "mazziesaccount@...il.com" <mazziesaccount@...il.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "jacek.anaszewski@...il.com" <jacek.anaszewski@...il.com>,
        "a.zummo@...ertech.it" <a.zummo@...ertech.it>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
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        "lee.jones@...aro.org" <lee.jones@...aro.org>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "broonie@...nel.org" <broonie@...nel.org>
Subject: Re: [PATCH v7 11/12] leds: Add common LED binding parsing support
 to LED class/core

Hello Again Pavel,

On Sat, 2019-12-21 at 20:37 +0100, Pavel Machek wrote:
> > +static void led_add_props(struct led_classdev *ld, struct
> > led_properties *props)
> > +{
> > +	if (props->default_trigger)
> > +		ld->default_trigger = props->default_trigger;
> > +	/*
> > +	 * According to binding docs the LED is by-default turned OFF
> > unless
> > +	 * default_state is used to indicate it should be ON or that
> > state
> > +	 * should be kept as is
> > +	 */
> > +	if (props->default_state) {
> > +		ld->brightness = LED_OFF;
> > +		if (!strcmp(props->default_state, "on"))
> > +			ld->brightness = LED_FULL;
> 
> Max brightness is not always == LED_FULL these days.

I took another look at this and changed this to:

if (!strcmp(props->default_state, "on")) {
	if (!ld->max_brightness)
		ld->brightness = LED_FULL;
	else
		ld->brightness = ld->max_brightness;
}

I hope this is what you were suggesting. I'll send the v8 (hopefully)
soon(ish).

Best Regards
	Matti