# 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
maintainers:
- Chunfeng Yun <chunfeng.yun@mediatek.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) / V3 (mt8195) 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 2/3:
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; the FMREG bank for slew rate calibration is not used anymore
and reserved on V3;
properties:
$nodename:
pattern: "^t-phy(@[0-9a-f]+)?$"
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,mt7986-tphy
- mediatek,mt8183-tphy
- mediatek,mt8186-tphy
- mediatek,mt8192-tphy
- mediatek,mt8365-tphy
- const: mediatek,generic-tphy-v2
- items:
- enum:
- mediatek,mt8188-tphy
- mediatek,mt8195-tphy
- const: mediatek,generic-tphy-v3
- const: mediatek,mt2701-u3phy
deprecated: true
- const: mediatek,mt2712-u3phy
deprecated: true
- const: mediatek,mt8173-u3phy
reg:
description:
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/V3, such as mt2712.
maxItems: 1
"#address-cells":
enum: [1, 2]
"#size-cells":
enum: [1, 2]
# 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
default: 26
mediatek,src-coef:
description:
Coefficient for slew rate calibrate, depends on SoC process
$ref: /schemas/types.yaml#/definitions/uint32
default: 28
# Required child node:
patternProperties:
"^(usb|pcie|sata)-phy@[0-9a-f]+$":
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
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
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
- PHY_TYPE_SGMII
nvmem-cells:
items:
- description: internal R efuse for U2 PHY or U3/PCIe PHY
- description: rx_imp_sel efuse for U3/PCIe PHY
- description: tx_imp_sel efuse for U3/PCIe PHY
description: |
Phandles to nvmem cell that contains the efuse data;
Available only for U2 PHY or U3/PCIe PHY of version 2/3, these
three items should be provided at the same time for U3/PCIe PHY,
when use software to load efuse;
If unspecified, will use hardware auto-load efuse.
nvmem-cell-names:
items:
- const: intr
- const: rx_imp
- const: tx_imp
# The following optional vendor properties are only for debug or HQA test
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,pre-emphasis:
description:
The level of pre-emphasis which used to widen the eye opening and
boost eye swing, the unit step is about 4.16% increment; e.g. the
level 1 means amplitude increases about 4.16%, the level 2 is about
8.3% etc. (U2 phy)
$ref: /schemas/types.yaml#/definitions/uint32
minimum: 1
maximum: 3
mediatek,bc12:
description:
Specify the flag to enable BC1.2 if support it
type: boolean
mediatek,syscon-type:
$ref: /schemas/types.yaml#/definitions/phandle-array
maxItems: 1
description:
A phandle to syscon used to access the register of type switch,
the field should always be 3 cells long.
items:
items:
- description:
The first cell represents a phandle to syscon
- description:
The second cell represents the register offset
- description:
The third cell represents the index of config segment
enum: [0, 1, 2, 3]
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>
usb@11271000 {
compatible = "mediatek,mt8173-mtu3", "mediatek,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>;
clocks = <&topckgen CLK_TOP_USB30_SEL>;
clock-names = "sys_ck";
};
t-phy@11290000 {
compatible = "mediatek,mt8173-u3phy";
reg = <0x11290000 0x800>;
#address-cells = <1>;
#size-cells = <1>;
ranges;
u2port0: usb-phy@11290800 {
reg = <0x11290800 0x100>;
clocks = <&apmixedsys CLK_APMIXED_REF2USB_TX>, <&clk48m>;
clock-names = "ref", "da_ref";
#phy-cells = <1>;
};
u3port0: usb-phy@11290900 {
reg = <0x11290900 0x700>;
clocks = <&clk26m>;
clock-names = "ref";
#phy-cells = <1>;
};
u2port1: usb-phy@11291000 {
reg = <0x11291000 0x100>;
#phy-cells = <1>;
};
};
...