linux-kernel - Re: [PATCH 4/4] ARM: dts: NSP: Move USB3 PHY to internal MDIO bus

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Date:   Thu, 24 Jun 2021 15:34:56 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     bcm-kernel-feedback-list@...adcom.com,
        Matthew Hagan <mnhagan88@...il.com>
Cc:     Vladimir Oltean <olteanv@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Vivek Unune <npcomplete13@...il.com>,
        Rob Herring <robh+dt@...nel.org>, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] ARM: dts: NSP: Move USB3 PHY to internal MDIO bus

On Sun, 13 Jun 2021 10:46:37 +0100, Matthew Hagan <mnhagan88@...il.com> wrote:
> This patch largely replicates Vivek Unune's patch "ARM: dts:
> BCM5301X:Make usb3 phy use mdio phy driver"[1] for the NSP platform,
> whereby we need to create an mdio-mux to facilitate switches
> configured via external MDIO, in this case on the Meraki MX65.
> 
> However in doing so, we are creating an overlap with usb3_phy's
> ccb-mii range. To resolve this, usb3_phy should be moved to a child
> node of the internal MDIO bus. The result is heavily based upon Vivek's
> patch. This has also been cross-referenced with Yendapally Reddy's
> earlier work which utilised the subsequently dropped brcm,nsp-usb3-phy
> driver: "[PATCH v2 4/4] arm: dts: nsp: Add USB nodes to device tree"
> [2]. Finally, this change provides conformance to the bcm-ns-usb3-phy
> documentation, utilising the required usb3-dmp-syscon property. Note
> that support for the deprecated ccb-mii bindings has been dropped as of
> "phy: phy-bcm-ns-usb3: drop support for deprecated DT binding"[3].
> 
> [1] https://lore.kernel.org/patchwork/patch/933971/
> [2] https://www.spinics.net/lists/arm-kernel/msg555132.html
> [3] https://lore.kernel.org/linux-devicetree/20201113113423.9466-1-zajec5@gmail.com/
> 
> Signed-off-by: Matthew Hagan <mnhagan88@...il.com>
> ---

Applied to https://github.com/Broadcom/stblinux/commits/devicetree/next, thanks!
--
Florian