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-* 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>;
- };