+++ /dev/null
-* Microsemi - vsc8531 Giga bit ethernet phy
-
-Optional properties:
-- vsc8531,vddmac : The vddmac in mV. Allowed values is listed
- in the first row of Table 1 (below).
- This property is only used in combination
- with the 'edge-slowdown' property.
- Default value is 3300.
-- vsc8531,edge-slowdown : % the edge should be slowed down relative to
- the fastest possible edge time.
- Edge rate sets the drive strength of the MAC
- interface output signals. Changing the
- drive strength will affect the edge rate of
- the output signal. The goal of this setting
- is to help reduce electrical emission (EMI)
- by being able to reprogram drive strength
- and in effect slow down the edge rate if
- desired.
- To adjust the edge-slowdown, the 'vddmac'
- must be specified. Table 1 lists the
- supported edge-slowdown values for a given
- 'vddmac'.
- Default value is 0%.
- Ref: Table:1 - Edge rate change (below).
-- vsc8531,led-[N]-mode : LED mode. Specify how the LED[N] should behave.
- N depends on the number of LEDs supported by a
- PHY.
- Allowed values are defined in
- "include/dt-bindings/net/mscc-phy-vsc8531.h".
- Default values are VSC8531_LINK_1000_ACTIVITY (1),
- VSC8531_LINK_100_ACTIVITY (2),
- VSC8531_LINK_ACTIVITY (0) and
- VSC8531_DUPLEX_COLLISION (8).
-- load-save-gpios : GPIO used for the load/save operation of the PTP
- hardware clock (PHC).
-
-
-Table: 1 - Edge rate change
-----------------------------------------------------------------|
-| Edge Rate Change (VDDMAC) |
-| |
-| 3300 mV 2500 mV 1800 mV 1500 mV |
-|---------------------------------------------------------------|
-| 0% 0% 0% 0% |
-| (Fastest) (recommended) (recommended) |
-|---------------------------------------------------------------|
-| 2% 3% 5% 6% |
-|---------------------------------------------------------------|
-| 4% 6% 9% 14% |
-|---------------------------------------------------------------|
-| 7% 10% 16% 21% |
-|(recommended) (recommended) |
-|---------------------------------------------------------------|
-| 10% 14% 23% 29% |
-|---------------------------------------------------------------|
-| 17% 23% 35% 42% |
-|---------------------------------------------------------------|
-| 29% 37% 52% 58% |
-|---------------------------------------------------------------|
-| 53% 63% 76% 77% |
-| (slowest) |
-|---------------------------------------------------------------|
-
-Example:
-
- vsc8531_0: ethernet-phy@0 {
- compatible = "ethernet-phy-id0007.0570";
- vsc8531,vddmac = <3300>;
- vsc8531,edge-slowdown = <7>;
- vsc8531,led-0-mode = <VSC8531_LINK_1000_ACTIVITY>;
- vsc8531,led-1-mode = <VSC8531_LINK_100_ACTIVITY>;
- load-save-gpios = <&gpio 10 GPIO_ACTIVE_HIGH>;
- };
--- /dev/null
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/mscc-phy-vsc8531.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microsemi VSC8531 Gigabit Ethernet PHY
+
+maintainers:
+ - Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
+
+description:
+ The VSC8531 is a Gigabit Ethernet PHY with configurable MAC interface
+ drive strength and LED modes.
+
+allOf:
+ - $ref: ethernet-phy.yaml#
+
+select:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - ethernet-phy-id0007.0570 # VSC8531
+ - ethernet-phy-id0007.0772 # VSC8541
+ required:
+ - compatible
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - ethernet-phy-id0007.0570 # VSC8531
+ - ethernet-phy-id0007.0772 # VSC8541
+ - const: ethernet-phy-ieee802.3-c22
+
+ vsc8531,vddmac:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ The VDDMAC voltage in millivolts. This property is used in combination
+ with the edge-slowdown property to control the drive strength of the
+ MAC interface output signals.
+ enum: [3300, 2500, 1800, 1500]
+ default: 3300
+
+ vsc8531,edge-slowdown:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: >
+ Percentage by which the edge rate should be slowed down relative to
+ the fastest possible edge time. This setting helps reduce electromagnetic
+ interference (EMI) by adjusting the drive strength of the MAC interface
+ output signals. Valid values depend on the vddmac voltage setting
+ according to the edge rate change table in the datasheet.
+
+ - When vsc8531,vddmac = 3300 mV: allowed values are 0, 2, 4, 7, 10, 17, 29, and 53.
+ (Recommended: 7)
+ - When vsc8531,vddmac = 2500 mV: allowed values are 0, 3, 6, 10, 14, 23, 37, and 63.
+ (Recommended: 10)
+ - When vsc8531,vddmac = 1800 mV: allowed values are 0, 5, 9, 16, 23, 35, 52, and 76.
+ (Recommended: 0)
+ - When vsc8531,vddmac = 1500 mV: allowed values are 0, 6, 14, 21, 29, 42, 58, and 77.
+ (Recommended: 0)
+ enum: [0, 2, 3, 4, 5, 6, 7, 9, 10, 14, 16, 17, 21, 23, 29, 35, 37, 42, 52, 53, 58, 63, 76, 77]
+ default: 0
+
+ vsc8531,led-0-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: LED[0] behavior mode. See include/dt-bindings/net/mscc-phy-vsc8531.h
+ for available modes.
+ minimum: 0
+ maximum: 15
+ default: 1
+
+ vsc8531,led-1-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: LED[1] behavior mode. See include/dt-bindings/net/mscc-phy-vsc8531.h
+ for available modes.
+ minimum: 0
+ maximum: 15
+ default: 2
+
+ vsc8531,led-2-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: LED[2] behavior mode. See include/dt-bindings/net/mscc-phy-vsc8531.h
+ for available modes.
+ minimum: 0
+ maximum: 15
+ default: 0
+
+ vsc8531,led-3-mode:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: LED[3] behavior mode. See include/dt-bindings/net/mscc-phy-vsc8531.h
+ for available modes.
+ minimum: 0
+ maximum: 15
+ default: 8
+
+ load-save-gpios:
+ description: GPIO phandle used for the load/save operation of the PTP hardware
+ clock (PHC).
+ maxItems: 1
+
+dependencies:
+ vsc8531,edge-slowdown:
+ - vsc8531,vddmac
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/net/mscc-phy-vsc8531.h>
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ethernet-phy@0 {
+ compatible = "ethernet-phy-id0007.0772", "ethernet-phy-ieee802.3-c22";
+ reg = <0>;
+ vsc8531,vddmac = <3300>;
+ vsc8531,edge-slowdown = <7>;
+ vsc8531,led-0-mode = <VSC8531_LINK_1000_ACTIVITY>;
+ vsc8531,led-1-mode = <VSC8531_LINK_100_ACTIVITY>;
+ load-save-gpios = <&gpio 10 GPIO_ACTIVE_HIGH>;
+ };
+ };
projects / thirdparty / kernel / linux.git / commitdiff
