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Add the Device Tree binding for two PCIe PHYs present on the SpacemiT K1 SoC. These PHYs are dependent on a separate combo PHY, which determines at probe time the calibration values used by the PCIe-only PHYs. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Alex Elder <elder@riscstar.com> Link: https://lore.kernel.org/all/ba532f8d-a452-40e5-af46-b58b89f70a92@linaro.org/ [1] Tested-by: Yixun Lan <dlan@gentoo.org> Link: https://patch.msgid.link/20251218151235.454997-3-elder@riscstar.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
72 lines
1.6 KiB
YAML
72 lines
1.6 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/phy/spacemit,k1-pcie-phy.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: SpacemiT K1 PCIe PHY
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maintainers:
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- Alex Elder <elder@riscstar.com>
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description: >
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Two PHYs on the SpacemiT K1 SoC used for only for PCIe. These
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PHYs must be configured using calibration values that are
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determined by a third "combo PHY". The combo PHY determines
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these calibration values during probe so they can be used for
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the two PCIe-only PHYs.
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The PHY uses an external oscillator as a reference clock. During
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normal operation, the PCIe host driver is responsible for ensuring
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all other clocks needed by a PHY are enabled, and all resets
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affecting the PHY are deasserted.
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properties:
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compatible:
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const: spacemit,k1-pcie-phy
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reg:
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items:
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- description: PHY control registers
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clocks:
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items:
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- description: External oscillator used by the PHY PLL
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clock-names:
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const: refclk
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resets:
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items:
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- description: PHY reset; remains deasserted after initialization
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reset-names:
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const: phy
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"#phy-cells":
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const: 0
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- resets
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- reset-names
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- "#phy-cells"
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/spacemit,k1-syscon.h>
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phy@c0c10000 {
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compatible = "spacemit,k1-pcie-phy";
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reg = <0xc0c10000 0x1000>;
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clocks = <&vctcxo_24m>;
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clock-names = "refclk";
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resets = <&syscon_apmu RESET_PCIE1_GLOBAL>;
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reset-names = "phy";
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#phy-cells = <0>;
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};
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