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@xxxxxxxxx/ Signed-off-by: Matthew Hagan <mnhagan88@xxxxxxxxx> --- arch/arm/boot/dts/bcm-nsp.dtsi | 38 +++++++++++++++++++++++++++------- 1 file changed, 31 insertions(+), 7 deletions(-) diff --git a/arch/arm/boot/dts/bcm-nsp.dtsi b/arch/arm/boot/dts/bcm-nsp.dtsi index e91a68996986..7c59816fdb32 100644 --- a/arch/arm/boot/dts/bcm-nsp.dtsi +++ b/arch/arm/boot/dts/bcm-nsp.dtsi @@ -370,6 +370,35 @@ mdio: mdio@32000 { #address-cells = <1>; }; + mdio-mux@32000 { + compatible = "mdio-mux-mmioreg"; + reg = <0x32000 0x4>; + mux-mask = <0x200>; + #address-cells = <1>; + #size-cells = <0>; + mdio-parent-bus = <&mdio>; + + mdio_int: mdio@0 { + reg = <0x0>; + #address-cells = <1>; + #size-cells = <0>; + + usb3_phy: usb3-phy@10 { + compatible = "brcm,ns-bx-usb3-phy"; + reg = <0x10>; + usb3-dmp-syscon = <&usb3_dmp>; + #phy-cells = <0>; + status = "disabled"; + }; + }; + + mdio_ext: mdio@200 { + reg = <0x200>; + #address-cells = <1>; + #size-cells = <0>; + }; + }; + rng: rng@33000 { compatible = "brcm,bcm-nsp-rng"; reg = <0x33000 0x14>; @@ -530,13 +559,8 @@ sata1: sata-port@1 { }; }; - usb3_phy: usb3-phy@104000 { - compatible = "brcm,ns-bx-usb3-phy"; - reg = <0x104000 0x1000>, - <0x032000 0x1000>; - reg-names = "dmp", "ccb-mii"; - #phy-cells = <0>; - status = "disabled"; + usb3_dmp: syscon@104000 { + reg = <0x104000 0x1000>; }; }; -- 2.26.3
