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# SPDX-License-Identifier: (GPL-
2.
0-only OR BSD-
2-Clause)
%YAML
1.
2
---
$id:
http://devicetree.org/schemas/phy/apm,xgene-phy.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: APM X-Gene
15Gbps Multi-purpose PHY
maintainers:
- Khuong Dinh <khuong@os.amperecomputing.com>
description:
PHY nodes are defined to describe on-chip
15Gbps Multi-purpose PHY. Each
PHY (pair of lanes) has its own node.
properties:
compatible:
items:
- const: apm,xgene-phy
reg:
maxItems:
1
'#phy-cells':
description:
Possible values are
0 (SATA),
1 (SGMII),
2 (PCIe),
3 (USB), and
4 (XFI).
const:
1
clocks:
maxItems:
1
apm,tx-eye-tuning:
description:
Manual control to fine tune the capture of the serial bit lines from the
automatic calibrated position. Two set of
3-tuple setting for each
supported link speed on the host. Range from
0 to
127 in unit of one bit
period.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
minItems:
2
maxItems:
2
items:
minItems:
3
maxItems:
3
items:
minimum:
0
maximum:
127
default:
10
apm,tx-eye-direction:
description:
Eye tuning manual control direction.
0 means sample data earlier than the
nominal sampling point.
1 means sample data later than the nominal
sampling point. Two set of
3-tuple setting for each supported link speed
on the host.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
minItems:
2
maxItems:
2
items:
minItems:
3
maxItems:
3
items:
enum: [
0,
1]
default:
0
apm,tx-boost-gain:
description:
Frequency boost AC (LSB
3-bit) and DC (
2-bit) gain control. Two set of
3-tuple setting for each supported link speed on the host. Range is
between
0 to
31 in unit of dB. Default is
3.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
minItems:
2
maxItems:
2
items:
minItems:
3
maxItems:
3
items:
minimum:
0
maximum:
31
apm,tx-amplitude:
description:
Amplitude control. Two set of
3-tuple setting for each supported link
speed on the host. Range is between
0 to
199500 in unit of uV.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
minItems:
2
maxItems:
2
items:
minItems:
3
maxItems:
3
items:
minimum:
0
maximum:
199500
default:
199500
apm,tx-pre-cursor1:
description:
1st pre-cursor emphasis taps control. Two set of
3-tuple setting for
each supported link speed on the host. Range is
0 to
273000 in unit of
uV.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
minItems:
2
maxItems:
2
items:
minItems:
3
maxItems:
3
items:
minimum:
0
maximum:
273000
default:
0
apm,tx-pre-cursor2:
description:
2nd pre-cursor emphasis taps control. Two set of
3-tuple setting for
each supported link speed on the host. Range is
0 to
127400 in unit uV.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
minItems:
2
maxItems:
2
items:
minItems:
3
maxItems:
3
items:
minimum:
0
maximum:
127400
default:
0
apm,tx-post-cursor:
description: |
Post-cursor emphasis taps control. Two set of
3-tuple setting for Gen1,
Gen2, and Gen3 link speeds. Range is between
0 to
31 in unit of
18.
2mV.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
minItems:
2
maxItems:
2
items:
minItems:
3
maxItems:
3
items:
minimum:
0
maximum:
31
default:
0xf
apm,tx-speed:
description: >
Tx operating speed. One set of
3-tuple for each supported link speed on
the host:
0 =
1-
2Gbps
1 =
2-
4Gbps (
1st tuple default)
2 =
4-
8Gbps
3 =
8-
15Gbps (
2nd tuple default)
4 =
2.
5-
4Gbps
5 =
4-
5Gbps
6 =
5-
6Gbps
7 =
6-
16Gbps (
3rd tuple default).
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems:
3
maxItems:
3
items:
maximum:
7
additionalProperties: false
examples:
- |
phy@
1f21a000 {
compatible = "apm,xgene-phy";
reg = <
0x1f21a000
0x100>;
#phy-cells = <
1>;
};
