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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/phy/fsl,imx8-pcie-phy.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale i.MX8 SoC series PCIe PHY
maintainers:
- Richard Zhu <hongxing.zhu@nxp.com>
properties:
"#phy-cells":
const: 0
compatible:
enum:
- fsl,imx8mm-pcie-phy
- fsl,imx8mp-pcie-phy
reg:
maxItems: 1
clocks:
maxItems: 1
clock-names:
items:
- const: ref
resets:
minItems: 1
maxItems: 2
reset-names:
oneOf:
- items: # for iMX8MM
- const: pciephy
- items: # for IMX8MP
- const: pciephy
- const: perst
fsl,refclk-pad-mode:
description: |
Specifies the mode of the refclk pad used. It can be UNUSED(PHY
refclock is derived from SoC internal source), INPUT(PHY refclock
is provided externally via the refclk pad) or OUTPUT(PHY refclock
is derived from SoC internal source and provided on the refclk pad).
Refer include/dt-bindings/phy/phy-imx8-pcie.h for the constants
to be used.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [ 0, 1, 2 ]
fsl,tx-deemph-gen1:
description: Gen1 De-emphasis value (optional).
$ref: /schemas/types.yaml#/definitions/uint32
default: 0
fsl,tx-deemph-gen2:
description: Gen2 De-emphasis value (optional).
$ref: /schemas/types.yaml#/definitions/uint32
default: 0
fsl,clkreq-unsupported:
type: boolean
description: A boolean property indicating the CLKREQ# signal is
not supported in the board design (optional)
power-domains:
description: PCIe PHY power domain (optional).
maxItems: 1
required:
- "#phy-cells"
- compatible
- reg
- clocks
- clock-names
- fsl,refclk-pad-mode
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/imx8mm-clock.h>
#include <dt-bindings/phy/phy-imx8-pcie.h>
#include <dt-bindings/reset/imx8mq-reset.h>
pcie_phy: pcie-phy@32f00000 {
compatible = "fsl,imx8mm-pcie-phy";
reg = <0x32f00000 0x10000>;
clocks = <&clk IMX8MM_CLK_PCIE1_PHY>;
clock-names = "ref";
assigned-clocks = <&clk IMX8MM_CLK_PCIE1_PHY>;
assigned-clock-rates = <100000000>;
assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_100M>;
resets = <&src IMX8MQ_RESET_PCIEPHY>;
reset-names = "pciephy";
fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_INPUT>;
#phy-cells = <0>;
};
...
|
