tjh.dev
Linux kernel mirror (for testing)
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linux
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/net/fsl,fman-mdio.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Freescale Frame Manager MDIO Device
8
9maintainers:
10 - Frank Li <Frank.Li@nxp.com>
11
12description: FMan MDIO Node.
13 The MDIO is a bus to which the PHY devices are connected.
14
15properties:
16 compatible:
17 enum:
18 - fsl,fman-mdio
19 - fsl,fman-xmdio
20 - fsl,fman-memac-mdio
21 description:
22 Must include "fsl,fman-mdio" for 1 Gb/s MDIO from FMan v2.
23 Must include "fsl,fman-xmdio" for 10 Gb/s MDIO from FMan v2.
24 Must include "fsl,fman-memac-mdio" for 1/10 Gb/s MDIO from
25 FMan v3.
26
27 reg:
28 maxItems: 1
29
30 clocks:
31 items:
32 - description: A reference to the input clock of the controller
33 from which the MDC frequency is derived.
34
35 interrupts:
36 maxItems: 1
37
38 fsl,fman-internal-mdio:
39 $ref: /schemas/types.yaml#/definitions/flag
40 description:
41 Fman has internal MDIO for internal PCS(Physical
42 Coding Sublayer) PHYs and external MDIO for external PHYs.
43 The settings and programming routines for internal/external
44 MDIO are different. Must be included for internal MDIO.
45
46 fsl,erratum-a009885:
47 $ref: /schemas/types.yaml#/definitions/flag
48 description: Indicates the presence of the A009885
49 erratum describing that the contents of MDIO_DATA may
50 become corrupt unless it is read within 16 MDC cycles
51 of MDIO_CFG[BSY] being cleared, when performing an
52 MDIO read operation.
53
54 fsl,erratum-a011043:
55 $ref: /schemas/types.yaml#/definitions/flag
56 description:
57 Indicates the presence of the A011043 erratum
58 describing that the MDIO_CFG[MDIO_RD_ER] bit may be falsely
59 set when reading internal PCS registers. MDIO reads to
60 internal PCS registers may result in having the
61 MDIO_CFG[MDIO_RD_ER] bit set, even when there is no error and
62 read data (MDIO_DATA[MDIO_DATA]) is correct.
63 Software may get false read error when reading internal
64 PCS registers through MDIO. As a workaround, all internal
65 MDIO accesses should ignore the MDIO_CFG[MDIO_RD_ER] bit.
66
67 For internal PHY device on internal mdio bus, a PHY node should be created.
68 See the definition of the PHY node in booting-without-of.txt for an
69 example of how to define a PHY (Internal PHY has no interrupt line).
70 - For "fsl,fman-mdio" compatible internal mdio bus, the PHY is TBI PHY.
71 - For "fsl,fman-memac-mdio" compatible internal mdio bus, the PHY is PCS PHY.
72 The PCS PHY address should correspond to the value of the appropriate
73 MDEV_PORT.
74
75 little-endian:
76 $ref: /schemas/types.yaml#/definitions/flag
77 description:
78 IP block is little-endian mode. The default endian mode is big-endian.
79
80required:
81 - compatible
82 - reg
83
84allOf:
85 - $ref: mdio.yaml#
86
87unevaluatedProperties: false
88
89examples:
90 - |
91 mdio@f1000 {
92 compatible = "fsl,fman-xmdio";
93 reg = <0xf1000 0x1000>;
94 interrupts = <101 2 0 0>;
95 };
96
97 - |
98 mdio@e3120 {
99 compatible = "fsl,fman-mdio";
100 reg = <0xe3120 0xee0>;
101 fsl,fman-internal-mdio;
102 #address-cells = <1>;
103 #size-cells = <0>;
104
105 tbi-phy@8 {
106 reg = <0x8>;
107 device_type = "tbi-phy";
108 };
109 };
110
111 - |
112 mdio@f1000 {
113 compatible = "fsl,fman-memac-mdio";
114 reg = <0xf1000 0x1000>;
115 fsl,fman-internal-mdio;
116 #address-cells = <1>;
117 #size-cells = <0>;
118
119 pcsphy6: ethernet-phy@0 {
120 reg = <0x0>;
121 };
122 };
123