linux-kernel - Re: [net-next PATCH v6 06/16] net: phy: phy_device: Call into the PHY driver to set LED brightness

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Message-ID: <7ea465d9-95eb-d158-632a-a2aa892fd2bf@gmail.com>
Date:   Thu, 13 Apr 2023 07:04:46 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Christian Marangi <ansuelsmth@...il.com>
Cc:     Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        John Crispin <john@...ozen.org>, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [net-next PATCH v6 06/16] net: phy: phy_device: Call into the PHY
 driver to set LED brightness



On 4/12/2023 4:11 PM, Christian Marangi wrote:
> On Thu, Apr 13, 2023 at 06:57:51AM -0700, Florian Fainelli wrote:
>>
>>
>> On 3/27/2023 7:10 AM, Christian Marangi wrote:
>>> From: Andrew Lunn <andrew@...n.ch>
>>>
>>> Linux LEDs can be software controlled via the brightness file in /sys.
>>> LED drivers need to implement a brightness_set function which the core
>>> will call. Implement an intermediary in phy_device, which will call
>>> into the phy driver if it implements the necessary function.
>>>
>>> Signed-off-by: Andrew Lunn <andrew@...n.ch>
>>> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
>>
>> Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
>>
>>> +	int (*led_brightness_set)(struct phy_device *dev,
>>> +				  u32 index, enum led_brightness value);
>>
>> I think I would have made this an u8, 4 billion LEDs, man, that's a lot!
> 
> If andrew is ok we can still consider to reduce it. (but just to joke
> about it... A MAN CAN DREAM OF A FULL HD SCREEN ON THEIR OWN SPECIAL
> PORT)

Humm just thought of something else, is it OK for led_brightness_set and 
led_blink_set to call into functions that might require sleeping (MDIO, 
I2C, SPI, etc.)?
-- 
Florian