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Message-ID: <20201016170444.GB1562276@bogus>
Date: Fri, 16 Oct 2020 12:04:44 -0500
From: Rob Herring <robh@...nel.org>
To: Chunfeng Yun <chunfeng.yun@...iatek.com>
Cc: Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Kishon Vijay Abraham I <kishon@...com>,
Vinod Koul <vkoul@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
"David S . Miller" <davem@...emloft.net>,
CK Hu <ck.hu@...iatek.com>,
Stanley Chu <stanley.chu@...iatek.com>,
Min Guo <min.guo@...iatek.com>,
dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v2 2/8] dt-bindings: phy: convert phy-mtk-tphy.txt to
YAML schema
On Tue, Oct 13, 2020 at 04:52:01PM +0800, Chunfeng Yun wrote:
> Convert phy-mtk-tphy.txt to YAML schema mediatek,tphy.yaml
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> ---
> v2: modify description and compatible
> ---
> .../bindings/phy/mediatek,tphy.yaml | 263 ++++++++++++++++++
> .../devicetree/bindings/phy/phy-mtk-tphy.txt | 162 -----------
> 2 files changed, 263 insertions(+), 162 deletions(-)
> create mode 100755 Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
> delete mode 100644 Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
>
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
> new file mode 100755
> index 000000000000..56ad8be69095
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
> @@ -0,0 +1,263 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (c) 2020 MediaTek
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/mediatek,tphy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek T-PHY Controller Device Tree Bindings
> +
> +maintainers:
> + - Chunfeng Yun <chunfeng.yun@...iatek.com>
> +
> +description: |
> + The T-PHY controller supports physical layer functionality for a number of
> + controllers on MediaTek SoCs, includes USB2.0, USB3.0, PCIe and SATA.
> +
> + Layout differences of banks between T-PHY V1 (mt8173/mt2701) and
> + T-PHY V2 (mt2712) when works on USB mode:
> + -----------------------------------
> + Version 1:
> + port offset bank
> + shared 0x0000 SPLLC
> + 0x0100 FMREG
> + u2 port0 0x0800 U2PHY_COM
> + u3 port0 0x0900 U3PHYD
> + 0x0a00 U3PHYD_BANK2
> + 0x0b00 U3PHYA
> + 0x0c00 U3PHYA_DA
> + u2 port1 0x1000 U2PHY_COM
> + u3 port1 0x1100 U3PHYD
> + 0x1200 U3PHYD_BANK2
> + 0x1300 U3PHYA
> + 0x1400 U3PHYA_DA
> + u2 port2 0x1800 U2PHY_COM
> + ...
> +
> + Version 2:
> + port offset bank
> + u2 port0 0x0000 MISC
> + 0x0100 FMREG
> + 0x0300 U2PHY_COM
> + u3 port0 0x0700 SPLLC
> + 0x0800 CHIP
> + 0x0900 U3PHYD
> + 0x0a00 U3PHYD_BANK2
> + 0x0b00 U3PHYA
> + 0x0c00 U3PHYA_DA
> + u2 port1 0x1000 MISC
> + 0x1100 FMREG
> + 0x1300 U2PHY_COM
> + u3 port1 0x1700 SPLLC
> + 0x1800 CHIP
> + 0x1900 U3PHYD
> + 0x1a00 U3PHYD_BANK2
> + 0x1b00 U3PHYA
> + 0x1c00 U3PHYA_DA
> + u2 port2 0x2000 MISC
> + ...
> +
> + SPLLC shared by u3 ports and FMREG shared by u2 ports on V1 are put back
> + into each port; a new bank MISC for u2 ports and CHIP for u3 ports are
> + added on V2.
> +
> +properties:
> + $nodename:
> + pattern: "^t-phy@[0-9a-f]+$"
Wrong indentation. Should be 1 less.
> +
> + compatible:
> + oneOf:
> + - items:
> + - enum:
> + - mediatek,mt2701-tphy
> + - mediatek,mt7623-tphy
> + - mediatek,mt7622-tphy
> + - mediatek,mt8516-tphy
> + - const: mediatek,generic-tphy-v1
> + - items:
> + - enum:
> + - mediatek,mt2712-tphy
> + - mediatek,mt7629-tphy
> + - mediatek,mt8183-tphy
> + - const: mediatek,generic-tphy-v2
> + - const: mediatek,mt2701-u3phy
> + deprecated: true
> + - const: mediatek,mt2712-u3phy
> + deprecated: true
> + - const: mediatek,mt8173-u3phy
> +
> + reg:
> + description: |
Don't need '|' if there's no formatting to preserve.
> + Register shared by multiple ports, exclude port's private register.
> + It is needed for T-PHY V1, such as mt2701 and mt8173, but not for
> + T-PHY V2, such as mt2712.
> + maxItems: 1
> +
> + "#address-cells":
> + enum: [1, 2]
> +
> + "#size-cells":
> + enum: [1, 2]
Wrong indent.
> +
> + # Used with non-empty value if optional 'reg' is not provided.
> + # The format of the value is an arbitrary number of triplets of
> + # (child-bus-address, parent-bus-address, length).
> + ranges: true
> +
> + mediatek,src-ref-clk-mhz:
> + description:
> + Frequency of reference clock for slew rate calibrate
> + $ref: /schemas/types.yaml#/definitions/uint32
> + default: 26
> +
> + mediatek,src-coef:
> + description:
> + Coefficient for slew rate calibrate, depends on SoC process
> + $ref: /schemas/types.yaml#/definitions/uint32
> + default: 28
> +
> +# Required child node:
> +patternProperties:
> + "^usb-phy@[0-9a-f]+$":
> + type: object
> + description: |
> + A sub-node is required for each port the controller provides.
> + Address range information including the usual 'reg' property
> + is used inside these nodes to describe the controller's topology.
> +
> + properties:
> + reg:
> + maxItems: 1
> +
> + clocks:
> + minItems: 1
> + maxItems: 2
> + items:
> + - description: Reference clock, (HS is 48Mhz, SS/P is 24~27Mhz)
> + - description: Reference clock of analog phy
> + description: |
> + Uses both clocks if the clock of analog and digital phys are
> + separated, otherwise uses "ref" clock only if needed.
> +
> + clock-names:
> + minItems: 1
> + maxItems: 2
> + items:
> + - const: ref
> + - const: da_ref
> +
> + "#phy-cells":
> + const: 1
> + description: |
> + The cells contain the following arguments.
> +
> + - description: The PHY type
> + enum:
> + - PHY_TYPE_USB2
> + - PHY_TYPE_USB3
> + - PHY_TYPE_PCIE
> + - PHY_TYPE_SATA
> +
> + #The following optional vendor properties are only for debug or HQA test
space ^
> + mediatek,eye-src:
> + description:
> + The value of slew rate calibrate (U2 phy)
> + $ref: /schemas/types.yaml#/definitions/uint32
> + minimum: 1
> + maximum: 7
> +
> + mediatek,eye-vrt:
> + description:
> + The selection of VRT reference voltage (U2 phy)
> + $ref: /schemas/types.yaml#/definitions/uint32
> + minimum: 1
> + maximum: 7
> +
> + mediatek,eye-term:
> + description:
> + The selection of HS_TX TERM reference voltage (U2 phy)
> + $ref: /schemas/types.yaml#/definitions/uint32
> + minimum: 1
> + maximum: 7
> +
> + mediatek,intr:
> + description:
> + The selection of internal resistor (U2 phy)
> + $ref: /schemas/types.yaml#/definitions/uint32
> + minimum: 1
> + maximum: 31
> +
> + mediatek,discth:
> + description:
> + The selection of disconnect threshold (U2 phy)
> + $ref: /schemas/types.yaml#/definitions/uint32
> + minimum: 1
> + maximum: 15
> +
> + mediatek,bc12:
> + description:
> + Specify the flag to enable BC1.2 if support it
> + type: boolean
> +
> + required:
> + - reg
> + - "#phy-cells"
> +
> + additionalProperties: false
> +
> +required:
> + - compatible
> + - "#address-cells"
> + - "#size-cells"
> + - ranges
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/clock/mt8173-clk.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/phy/phy.h>
> + susb: usb@...71000 {
Drop unused labels.
> + compatible = "mediatek,mt8173-mtu3";
> + reg = <0x11271000 0x3000>, <0x11280700 0x0100>;
> + reg-names = "mac", "ippc";
> + phys = <&u2port0 PHY_TYPE_USB2>,
> + <&u3port0 PHY_TYPE_USB3>,
> + <&u2port1 PHY_TYPE_USB2>;
> + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
> + };
> +
> + u3phy: t-phy@...90000 {
> + compatible = "mediatek,mt8173-u3phy";
> + reg = <0x11290000 0x800>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
> + status = "okay";
Don't show status in examples.
> +
> + u2port0: usb-phy@...90800 {
> + reg = <0x11290800 0x100>;
> + clocks = <&apmixedsys CLK_APMIXED_REF2USB_TX>, <&clk48m>;
> + clock-names = "ref", "da_ref";
> + #phy-cells = <1>;
> + status = "okay";
> + };
> +
> + u3port0: usb-phy@...90900 {
> + reg = <0x11290900 0x700>;
> + clocks = <&clk26m>;
> + clock-names = "ref";
> + #phy-cells = <1>;
> + status = "okay";
> + };
> +
> + u2port1: usb-phy@...91000 {
> + reg = <0x11291000 0x100>;
> + #phy-cells = <1>;
> + status = "okay";
> + };
> + };
> +
> +...
> diff --git a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
> deleted file mode 100644
> index dd75b676b71d..000000000000
> --- a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
> +++ /dev/null
> @@ -1,162 +0,0 @@
> -MediaTek T-PHY binding
> ---------------------------
> -
> -T-phy controller supports physical layer functionality for a number of
> -controllers on MediaTek SoCs, such as, USB2.0, USB3.0, PCIe, and SATA.
> -
> -Required properties (controller (parent) node):
> - - compatible : should be one of
> - "mediatek,generic-tphy-v1"
> - "mediatek,generic-tphy-v2"
> - "mediatek,mt2701-u3phy" (deprecated)
> - "mediatek,mt2712-u3phy" (deprecated)
> - "mediatek,mt8173-u3phy";
> - make use of "mediatek,generic-tphy-v1" on mt2701 instead and
> - "mediatek,generic-tphy-v2" on mt2712 instead.
> -
> -- #address-cells: the number of cells used to represent physical
> - base addresses.
> -- #size-cells: the number of cells used to represent the size of an address.
> -- ranges: the address mapping relationship to the parent, defined with
> - - empty value: if optional 'reg' is used.
> - - non-empty value: if optional 'reg' is not used. should set
> - the child's base address to 0, the physical address
> - within parent's address space, and the length of
> - the address map.
> -
> -Required nodes : a sub-node is required for each port the controller
> - provides. Address range information including the usual
> - 'reg' property is used inside these nodes to describe
> - the controller's topology.
> -
> -Optional properties (controller (parent) node):
> - - reg : offset and length of register shared by multiple ports,
> - exclude port's private register. It is needed on mt2701
> - and mt8173, but not on mt2712.
> - - mediatek,src-ref-clk-mhz : frequency of reference clock for slew rate
> - calibrate
> - - mediatek,src-coef : coefficient for slew rate calibrate, depends on
> - SoC process
> -
> -Required properties (port (child) node):
> -- reg : address and length of the register set for the port.
> -- #phy-cells : should be 1 (See second example)
> - cell after port phandle is phy type from:
> - - PHY_TYPE_USB2
> - - PHY_TYPE_USB3
> - - PHY_TYPE_PCIE
> - - PHY_TYPE_SATA
> -
> -Optional properties (PHY_TYPE_USB2 port (child) node):
> -- clocks : a list of phandle + clock-specifier pairs, one for each
> - entry in clock-names
> -- clock-names : may contain
> - "ref": 48M reference clock for HighSpeed (digital) phy; and 26M
> - reference clock for SuperSpeed (digital) phy, sometimes is
> - 24M, 25M or 27M, depended on platform.
> - "da_ref": the reference clock of analog phy, used if the clocks
> - of analog and digital phys are separated, otherwise uses
> - "ref" clock only if needed.
> -
> -- mediatek,eye-src : u32, the value of slew rate calibrate
> -- mediatek,eye-vrt : u32, the selection of VRT reference voltage
> -- mediatek,eye-term : u32, the selection of HS_TX TERM reference voltage
> -- mediatek,bc12 : bool, enable BC12 of u2phy if support it
> -- mediatek,discth : u32, the selection of disconnect threshold
> -- mediatek,intr : u32, the selection of internal R (resistance)
> -
> -Example:
> -
> -u3phy: usb-phy@...90000 {
> - compatible = "mediatek,mt8173-u3phy";
> - reg = <0 0x11290000 0 0x800>;
> - #address-cells = <2>;
> - #size-cells = <2>;
> - ranges;
> -
> - u2port0: usb-phy@...90800 {
> - reg = <0 0x11290800 0 0x100>;
> - clocks = <&apmixedsys CLK_APMIXED_REF2USB_TX>;
> - clock-names = "ref";
> - #phy-cells = <1>;
> - };
> -
> - u3port0: usb-phy@...90900 {
> - reg = <0 0x11290800 0 0x700>;
> - clocks = <&clk26m>;
> - clock-names = "ref";
> - #phy-cells = <1>;
> - };
> -
> - u2port1: usb-phy@...91000 {
> - reg = <0 0x11291000 0 0x100>;
> - clocks = <&apmixedsys CLK_APMIXED_REF2USB_TX>;
> - clock-names = "ref";
> - #phy-cells = <1>;
> - };
> -};
> -
> -Specifying phy control of devices
> ----------------------------------
> -
> -Device nodes should specify the configuration required in their "phys"
> -property, containing a phandle to the phy port node and a device type;
> -phy-names for each port are optional.
> -
> -Example:
> -
> -#include <dt-bindings/phy/phy.h>
> -
> -usb30: usb@...70000 {
> - ...
> - phys = <&u2port0 PHY_TYPE_USB2>, <&u3port0 PHY_TYPE_USB3>;
> - phy-names = "usb2-0", "usb3-0";
> - ...
> -};
> -
> -
> -Layout differences of banks between mt8173/mt2701 and mt2712
> --------------------------------------------------------------
> -mt8173 and mt2701:
> -port offset bank
> -shared 0x0000 SPLLC
> - 0x0100 FMREG
> -u2 port0 0x0800 U2PHY_COM
> -u3 port0 0x0900 U3PHYD
> - 0x0a00 U3PHYD_BANK2
> - 0x0b00 U3PHYA
> - 0x0c00 U3PHYA_DA
> -u2 port1 0x1000 U2PHY_COM
> -u3 port1 0x1100 U3PHYD
> - 0x1200 U3PHYD_BANK2
> - 0x1300 U3PHYA
> - 0x1400 U3PHYA_DA
> -u2 port2 0x1800 U2PHY_COM
> - ...
> -
> -mt2712:
> -port offset bank
> -u2 port0 0x0000 MISC
> - 0x0100 FMREG
> - 0x0300 U2PHY_COM
> -u3 port0 0x0700 SPLLC
> - 0x0800 CHIP
> - 0x0900 U3PHYD
> - 0x0a00 U3PHYD_BANK2
> - 0x0b00 U3PHYA
> - 0x0c00 U3PHYA_DA
> -u2 port1 0x1000 MISC
> - 0x1100 FMREG
> - 0x1300 U2PHY_COM
> -u3 port1 0x1700 SPLLC
> - 0x1800 CHIP
> - 0x1900 U3PHYD
> - 0x1a00 U3PHYD_BANK2
> - 0x1b00 U3PHYA
> - 0x1c00 U3PHYA_DA
> -u2 port2 0x2000 MISC
> - ...
> -
> - SPLLC shared by u3 ports and FMREG shared by u2 ports on
> -mt8173/mt2701 are put back into each port; a new bank MISC for
> -u2 ports and CHIP for u3 ports are added on mt2712.
> --
> 2.18.0
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