Re: [PATCH v2 7/7] leds: leds-mt6323: Add support for WLEDs and MT6332

From: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: lee@kernel.org, sean.wang@mediatek.com, robh+dt@kernel.org,
	krzysztof.kozlowski+dt@linaro.org, matthias.bgg@gmail.com,
	linux-leds@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
	kernel@collabora.com
Subject: Re: [PATCH v2 7/7] leds: leds-mt6323: Add support for WLEDs and MT6332
Date: Thu, 13 Apr 2023 13:29:46 +0200	[thread overview]
Message-ID: <04d2b53e-4f5e-81ec-3397-e58898b7039e@collabora.com> (raw)
In-Reply-To: <ZDfiNSAs3Bc7xe1l@duo.ucw.cz>

Il 13/04/23 13:06, Pavel Machek ha scritto:
> Hi!
> 
>> Add basic code to turn on and off WLEDs and wire up MT6332 support
>> to take advantage of it.
>> This is a simple approach due to to the aforementioned PMIC supporting
>> only on/off status so, at the time of writing, it is impossible for me
>> to validate more advanced functionality due to lack of hardware.
> 
> 
>> @@ -467,14 +590,24 @@ static int mt6323_led_probe(struct platform_device *pdev)
>>   			goto put_child_node;
>>   		}
>>   
>> +		is_wled = of_property_read_bool(child, "mediatek,is-wled");
>> +
> 
> This needs documenting in the binding, no?
> 
>> +static const struct mt6323_hwspec mt6332_spec = {
>> +	/* There are no LEDs in MT6332. Only WLEDs are present. */
> 
> "Only WLED is present"?
> 
>> +	.max_leds = 0,
>> +	.max_wleds = 1,
>> +	.max_brightness = 1024,
>> +};
>> +
> 
> Is there chip with both LED and WLEDs? (I'm wondering if this makes
> sense in single driver).
> 

Some PMICs have got both LED(s) and WLED(s), yes - this is only on smartphone
designs though.

Regards,
Angelo