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Date: Fri, 20 Mar 2020 16:55:56 -0600
From: Rob Herring <robh@...nel.org>
To: Grygorii Strashko <grygorii.strashko@...com>
Cc: Peter Ujfalusi <peter.ujfalusi@...com>,
Tero Kristo <t-kristo@...com>,
"David S . Miller" <davem@...emloft.net>,
netdev <netdev@...r.kernel.org>, Roger Quadros <rogerq@...com>,
devicetree@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
Murali Karicheri <m-karicheri2@...com>,
Sekhar Nori <nsekhar@...com>,
Kishon Vijay Abraham I <kishon@...com>,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next v5 05/11] dt-binding: ti: am65x: document mcu
cpsw nuss
On Thu, Mar 19, 2020 at 06:28:00PM +0200, Grygorii Strashko wrote:
> Document device tree bindings for The TI AM654x/J721E SoC Gigabit Ethernet MAC
> (Media Access Controller - CPSW2G NUSS). The CPSW NUSS provides Ethernet packet
> communication for the device.
>
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> Tested-by: Murali Karicheri <m-karicheri2@...com>
> ---
> .../bindings/net/ti,k3-am654-cpsw-nuss.yaml | 226 ++++++++++++++++++
> 1 file changed, 226 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml
>
> diff --git a/Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml b/Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml
> new file mode 100644
> index 000000000000..c28b5c925377
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml
> @@ -0,0 +1,226 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/ti,k3-am654-cpsw-nuss.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: The TI AM654x/J721E SoC Gigabit Ethernet MAC (Media Access Controller) Device Tree Bindings
> +
> +maintainers:
> + - Grygorii Strashko <grygorii.strashko@...com>
> + - Sekhar Nori <nsekhar@...com>
> +
> +description:
> + The TI AM654x/J721E SoC Gigabit Ethernet MAC (CPSW2G NUSS) has two ports
> + (one external) and provides Ethernet packet communication for the device.
> + CPSW2G NUSS features - the Reduced Gigabit Media Independent Interface (RGMII),
> + Reduced Media Independent Interface (RMII), the Management Data
> + Input/Output (MDIO) interface for physical layer device (PHY) management,
> + new version of Common Platform Time Sync (CPTS), updated Address Lookup
> + Engine (ALE).
> + One external Ethernet port (port 1) with selectable RGMII/RMII interfaces and
> + an internal Communications Port Programming Interface (CPPI5) (Host port 0).
> + Host Port 0 CPPI Packet Streaming Interface interface supports 8 TX channels
> + and one RX channels and operating by TI AM654x/J721E NAVSS Unified DMA
> + Peripheral Root Complex (UDMA-P) controller.
> + The CPSW2G NUSS is integrated into device MCU domain named MCU_CPSW0.
> +
> + Additional features
> + priority level Quality Of Service (QOS) support (802.1p)
> + Support for Audio/Video Bridging (P802.1Qav/D6.0)
> + Support for IEEE 1588 Clock Synchronization (2008 Annex D, Annex E and Annex F)
> + Flow Control (802.3x) Support
> + Time Sensitive Network Support
> + IEEE P902.3br/D2.0 Interspersing Express Traffic
> + IEEE 802.1Qbv/D2.2 Enhancements for Scheduled Traffic
> + Configurable number of addresses plus VLANs
> + Configurable number of classifier/policers
> + VLAN support, 802.1Q compliant, Auto add port VLAN for untagged frames on
> + ingress, Auto VLAN removal on egress and auto pad to minimum frame size.
> + RX/TX csum offload
> +
> + Specifications can be found at
> + http://www.ti.com/lit/ug/spruid7e/spruid7e.pdf
> + http://www.ti.com/lit/ug/spruil1a/spruil1a.pdf
> +
> +properties:
> + "#address-cells": true
> + "#size-cells": true
> +
> + compatible:
> + oneOf:
> + - const: ti,am654-cpsw-nuss
> + - const: ti,j721e-cpsw-nuss
> +
> + reg:
> + maxItems: 1
> + description:
> + The physical base address and size of full the CPSW2G NUSS IO range
> +
> + reg-names:
> + items:
> + - const: cpsw_nuss
> +
> + ranges: true
> +
> + dma-coherent: true
> +
> + clocks:
> + description: CPSW2G NUSS functional clock
> +
> + clock-names:
> + items:
> + - const: fck
> +
> + power-domains:
> + maxItems: 1
> +
> + dmas:
> + minItems: 9
Drop this. maxItems is enough.
> + maxItems: 9
> +
> + dma-names:
> + items:
> + - const: tx0
> + - const: tx1
> + - const: tx2
> + - const: tx3
> + - const: tx4
> + - const: tx5
> + - const: tx6
> + - const: tx7
> + - const: rx
> +
> + pinctrl-names: true
Don't need this. It is implicitly allowed.
> +
> + ethernet-ports:
> + type: object
> + properties:
> + '#address-cells':
> + const: 1
> + '#size-cells':
> + const: 0
> +
> + patternProperties:
> + "^port@[0-9]+$":
reg must be 1, but unit-address can be any number (though it should be
hex)?
> + type: object
> + description: CPSW2G NUSS external ports
> +
> + allOf:
> + - $ref: ethernet-controller.yaml#
> +
> + properties:
> + reg:
> + items:
> + - const: 1
> + description: CPSW port number
> +
> + phys:
> + maxItems: 1
> + description: phandle on phy-gmii-sel PHY
> +
> + label:
> + description: label associated with this port
> +
> + ti,mac-only:
> + $ref: /schemas/types.yaml#definitions/flag
> + description:
> + Specifies the port works in mac-only mode.
> +
> + ti,syscon-efuse:
> + $ref: /schemas/types.yaml#definitions/phandle-array
> + description:
> + Phandle to the system control device node which provides access
> + to efuse IO range with MAC addresses
> +
> + required:
> + - reg
> + - phys
ethernet-ports needs an 'additionalProperties: false'
> +
> + mdio:
> + type: object
> + allOf:
> + - $ref: "ti,davinci-mdio.yaml#"
> + description:
> + CPSW MDIO bus.
> +
> +patternProperties:
> + "^pinctrl-[0-9]+$": true
Can drop this.
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - ranges
> + - clocks
> + - clock-names
> + - power-domains
> + - dmas
> + - dma-names
> + - '#address-cells'
> + - '#size-cells'
Add:
additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/pinctrl/k3.h>
> + #include <dt-bindings/soc/ti,sci_pm_domain.h>
> + #include <dt-bindings/net/ti-dp83867.h>
> +
> + mcu_cpsw: ethernet@...00000 {
> + compatible = "ti,am654-cpsw-nuss";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + reg = <0x0 0x46000000 0x0 0x200000>;
> + reg-names = "cpsw_nuss";
> + ranges = <0x0 0x0 0x46000000 0x0 0x200000>;
> + dma-coherent;
> + clocks = <&k3_clks 5 10>;
> + clock-names = "fck";
> + power-domains = <&k3_pds 5 TI_SCI_PD_EXCLUSIVE>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&mcu_cpsw_pins_default &mcu_mdio_pins_default>;
> +
> + dmas = <&mcu_udmap 0xf000>,
> + <&mcu_udmap 0xf001>,
> + <&mcu_udmap 0xf002>,
> + <&mcu_udmap 0xf003>,
> + <&mcu_udmap 0xf004>,
> + <&mcu_udmap 0xf005>,
> + <&mcu_udmap 0xf006>,
> + <&mcu_udmap 0xf007>,
> + <&mcu_udmap 0x7000>;
> + dma-names = "tx0", "tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
> + "rx";
> +
> + ethernet-ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cpsw_port1: port@1 {
> + reg = <1>;
> + ti,mac-only;
> + label = "port1";
> + ti,syscon-efuse = <&mcu_conf 0x200>;
> + phys = <&phy_gmii_sel 1>;
> +
> + phy-mode = "rgmii-rxid";
> + phy-handle = <&phy0>;
> + };
> + };
> +
> + davinci_mdio: mdio@f00 {
> + compatible = "ti,cpsw-mdio","ti,davinci_mdio";
> + reg = <0x0 0xf00 0x0 0x100>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + clocks = <&k3_clks 5 10>;
> + clock-names = "fck";
> + bus_freq = <1000000>;
> +
> + phy0: ethernet-phy@0 {
> + reg = <0>;
> + ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
> + ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
> + };
> + };
> + };
> --
> 2.17.1
>
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