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[75.72.117.212]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-50ae9bd89d7sm3933104173.59.2025.08.13.11.47.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Aug 2025 11:47:10 -0700 (PDT) From: Alex Elder To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, lpieralisi@kernel.org, kwilczynski@kernel.org, mani@kernel.org, bhelgaas@google.com, vkoul@kernel.org, kishon@kernel.org Cc: dlan@gentoo.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, p.zabel@pengutronix.de, tglx@linutronix.de, johan+linaro@kernel.org, thippeswamy.havalige@amd.com, namcao@linutronix.de, mayank.rana@oss.qualcomm.com, shradha.t@samsung.com, inochiama@gmail.com, quic_schintav@quicinc.com, fan.ni@samsung.com, devicetree@vger.kernel.org, linux-phy@lists.infradead.org, linux-pci@vger.kernel.org, spacemit@lists.linux.dev, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/6] dt-bindings: phy: spacemit: introduce PCIe PHY Date: Wed, 13 Aug 2025 13:46:56 -0500 Message-ID: <20250813184701.2444372-3-elder@riscstar.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250813184701.2444372-1-elder@riscstar.com> References: <20250813184701.2444372-1-elder@riscstar.com> Precedence: bulk X-Mailing-List: spacemit@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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. Signed-off-by: Alex Elder --- .../bindings/phy/spacemit,k1-pcie-phy.yaml | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/spacemit,k1-pcie-phy.yaml diff --git a/Documentation/devicetree/bindings/phy/spacemit,k1-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/spacemit,k1-pcie-phy.yaml new file mode 100644 index 0000000000000..b0cbd231d9378 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/spacemit,k1-pcie-phy.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/phy/spacemit,k1-pcie-phy.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: SpacemiT K1 PCIe PHY + +maintainers: + - Alex Elder + +description: + There are two PHYs on the SpacemiT K1 SoC used for PCIe (only). + These PHYs must be configured using calibration values that are + determined by a third "combo PHY". The combo PHY determines + these calibration values during probe so they can be used for + the two PCIe-only PHYs. + + During normal operation, the PCIe port driver is responsible for + ensuring all clocks needed by a PHY are enabled, and all resets + affecting the PHY are deasserted. + +properties: + compatible: + const: spacemit,k1-pcie-phy + + reg: + items: + - description: PHY control registers + + "#phy-cells": + const: 0 + +required: + - compatible + - reg + - "#phy-cells" + +additionalProperties: false + +examples: + - | + #include + pcie1_phy: phy@c0c10000 { + compatible = "spacemit,k1-pcie-phy"; + reg = <0xc0c10000 0x1000>; + #phy-cells = <0>; + status = "disabled"; + }; -- 2.48.1