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The hibernation mode of Atheros AR803x PHYs defaults to be enabled after hardware reset. When the cable is unplugged, the PHY will enter hibernation mode after about 10 seconds and the PHY clocks will be stopped to save power. However, some MACs need the phy output clock for proper functioning of their logic. For instance, stmmac needs the RX_CLK of PHY for software reset to complete. Therefore, add a DT property to configure the PHY to disable this hardware hibernation mode. Signed-off-by: Wei Fang <wei.fang@nxp.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
132 lines
3.3 KiB
YAML
132 lines
3.3 KiB
YAML
# SPDX-License-Identifier: GPL-2.0+
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/net/qca,ar803x.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm Atheros AR803x PHY
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maintainers:
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- Andrew Lunn <andrew@lunn.ch>
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- Florian Fainelli <f.fainelli@gmail.com>
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- Heiner Kallweit <hkallweit1@gmail.com>
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description: |
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Bindings for Qualcomm Atheros AR803x PHYs
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allOf:
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- $ref: ethernet-phy.yaml#
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properties:
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qca,clk-out-frequency:
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description: Clock output frequency in Hertz.
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [25000000, 50000000, 62500000, 125000000]
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qca,clk-out-strength:
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description: Clock output driver strength.
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1, 2]
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qca,disable-smarteee:
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description: Disable Atheros SmartEEE feature.
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type: boolean
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qca,keep-pll-enabled:
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description: |
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If set, keep the PLL enabled even if there is no link. Useful if you
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want to use the clock output without an ethernet link.
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Only supported on the AR8031.
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type: boolean
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qca,disable-hibernation-mode:
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description: |
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Disable Atheros AR803X PHYs hibernation mode. If present, indicates
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that the hardware of PHY will not enter power saving mode when the
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cable is disconnected. And the RX_CLK always keeps outputting a
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valid clock.
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type: boolean
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qca,smarteee-tw-us-100m:
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description: EEE Tw parameter for 100M links.
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 1
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maximum: 255
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qca,smarteee-tw-us-1g:
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description: EEE Tw parameter for gigabit links.
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 1
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maximum: 255
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vddio-supply:
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description: |
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RGMII I/O voltage regulator (see regulator/regulator.yaml).
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The PHY supports RGMII I/O voltages of 1.5V, 1.8V and 2.5V. You can
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either connect this to the vddio-regulator (1.5V / 1.8V) or the
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vddh-regulator (2.5V).
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Only supported on the AR8031.
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vddio-regulator:
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type: object
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description:
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Initial data for the VDDIO regulator. Set this to 1.5V or 1.8V.
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$ref: /schemas/regulator/regulator.yaml
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vddh-regulator:
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type: object
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description:
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Dummy subnode to model the external connection of the PHY VDDH
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regulator to VDDIO.
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$ref: /schemas/regulator/regulator.yaml
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/net/qca-ar803x.h>
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ethernet {
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#address-cells = <1>;
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#size-cells = <0>;
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phy-mode = "rgmii-id";
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ethernet-phy@0 {
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reg = <0>;
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qca,clk-out-frequency = <125000000>;
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qca,clk-out-strength = <AR803X_STRENGTH_FULL>;
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vddio-supply = <&vddio>;
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vddio: vddio-regulator {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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};
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};
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};
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- |
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#include <dt-bindings/net/qca-ar803x.h>
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ethernet {
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#address-cells = <1>;
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#size-cells = <0>;
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phy-mode = "rgmii-id";
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ethernet-phy@0 {
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reg = <0>;
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qca,clk-out-frequency = <50000000>;
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qca,keep-pll-enabled;
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vddio-supply = <&vddh>;
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vddh: vddh-regulator {
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};
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};
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};
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