linux-kernel - Re: [net-next PATCH v9 5/5] net: phy: at803x: add LED support for qca808x

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Date: Tue, 9 Jan 2024 02:20:15 +0100
From: Andrew Lunn <andrew@...n.ch>
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>,
	Conor Dooley <conor+dt@...nel.org>,
	William Zhang <william.zhang@...adcom.com>,
	Anand Gore <anand.gore@...adcom.com>,
	Kursad Oney <kursad.oney@...adcom.com>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Rafał Miłecki <rafal@...ecki.pl>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.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>,
	Jacek Anaszewski <jacek.anaszewski@...il.com>,
	Fernández Rojas <noltari@...il.com>,
	Sven Schwermer <sven.schwermer@...ruptive-technologies.com>,
	linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	netdev@...r.kernel.org
Subject: Re: [net-next PATCH v9 5/5] net: phy: at803x: add LED support for
 qca808x

On Fri, Jan 05, 2024 at 03:27:17PM +0100, Christian Marangi wrote:
> Add LED support for QCA8081 PHY.
> 
> Documentation for this LEDs PHY is very scarce even with NDA access
> to Documentation for OEMs. Only the blink pattern are documented and are
> very confusing most of the time. No documentation is present about
> forcing the LED on/off or to always blink.
> 
> Those settings were reversed by poking the regs and trying to find the
> correct bits to trigger these modes. Some bits mode are not clear and
> maybe the documentation option are not 100% correct. For the sake of LED
> support the reversed option are enough to add support for current LED
> APIs.
> 
> Supported HW control modes are:
> - tx
> - rx
> - link10
> - link100
> - link1000
> - half_duplex
> - full_duplex
> 
> Also add support for LED polarity set to set LED polarity to active
> high or low. QSDK sets this value to high by default but PHY reset value
> doesn't have this enabled by default.
> 
> QSDK also sets 2 additional bits but their usage is not clear, info about
> this is added in the header. It was verified that for correct function
> of the LED if active high is needed, only BIT 6 is needed.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew