From: Alex Elder <elder@riscstar.com>
To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
bhelgaas@google.com, lpieralisi@kernel.org,
kwilczynski@kernel.org, mani@kernel.org, vkoul@kernel.org,
kishon@kernel.org
Cc: dlan@gentoo.org, guodong@riscstar.com, pjw@kernel.org,
palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr,
p.zabel@pengutronix.de, christian.bruel@foss.st.com,
shradha.t@samsung.com, krishna.chundru@oss.qualcomm.com,
qiang.yu@oss.qualcomm.com, namcao@linutronix.de,
thippeswamy.havalige@amd.com, inochiama@gmail.com,
devicetree@vger.kernel.org, linux-pci@vger.kernel.org,
linux-phy@lists.infradead.org, spacemit@lists.linux.dev,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/7] dt-bindings: phy: spacemit: introduce PCIe PHY
Date: Mon, 13 Oct 2025 10:35:19 -0500 [thread overview]
Message-ID: <20251013153526.2276556-3-elder@riscstar.com> (raw)
In-Reply-To: <20251013153526.2276556-1-elder@riscstar.com>
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 <elder@riscstar.com>
---
v2: - Added '>' to the description, and reworded it a bit
- Added clocks and clock-names properties
- Dropped the label and status property from the example
.../bindings/phy/spacemit,k1-pcie-phy.yaml | 59 +++++++++++++++++++
1 file changed, 59 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..c821f6cafcdae
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/spacemit,k1-pcie-phy.yaml
@@ -0,0 +1,59 @@
+# 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 <elder@riscstar.com>
+
+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.
+
+ The PHY uses an external oscillator as a reference clock. During
+ normal operation, the PCIe host driver is responsible for ensuring
+ all other 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
+
+ clocks:
+ items:
+ - description: External oscillator used by the PHY PLL
+
+ clock-names:
+ const: refclk
+
+ "#phy-cells":
+ const: 0
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ phy@c0c10000 {
+ compatible = "spacemit,k1-pcie-phy";
+ reg = <0xc0c10000 0x1000>;
+ clocks = <&vctcxo_24m>;
+ clock-names = "refclk";
+ #phy-cells = <0>;
+ };
--
2.48.1
next prev parent reply other threads:[~2025-10-13 15:35 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-13 15:35 [PATCH v2 0/7] Introduce SpacemiT K1 PCIe phy and host controller Alex Elder
2025-10-13 15:35 ` [PATCH v2 1/7] dt-bindings: phy: spacemit: add SpacemiT PCIe/combo PHY Alex Elder
2025-10-15 14:52 ` Rob Herring
2025-10-17 16:20 ` Alex Elder
2025-10-13 15:35 ` Alex Elder [this message]
2025-10-15 16:41 ` [PATCH v2 2/7] dt-bindings: phy: spacemit: introduce PCIe PHY Rob Herring (Arm)
2025-10-17 16:20 ` Alex Elder
2025-10-13 15:35 ` [PATCH v2 3/7] dt-bindings: pci: spacemit: introduce PCIe host controller Alex Elder
2025-10-14 1:55 ` Yao Zi
2025-10-14 1:57 ` Alex Elder
2025-10-15 16:47 ` Rob Herring
2025-10-17 16:20 ` Alex Elder
2025-10-26 16:38 ` Manivannan Sadhasivam
2025-10-27 22:24 ` Alex Elder
2025-10-28 5:58 ` Manivannan Sadhasivam
2025-10-30 0:10 ` Alex Elder
2025-10-13 15:35 ` [PATCH v2 4/7] phy: spacemit: introduce PCIe/combo PHY Alex Elder
2025-10-15 21:51 ` Aurelien Jarno
2025-10-17 16:21 ` Alex Elder
2025-10-13 15:35 ` [PATCH v2 5/7] PCI: spacemit: introduce SpacemiT PCIe host driver Alex Elder
2025-10-26 16:55 ` Manivannan Sadhasivam
2025-10-27 22:24 ` Alex Elder
2025-10-28 7:06 ` Manivannan Sadhasivam
2025-10-30 0:10 ` Alex Elder
2025-10-31 6:05 ` Manivannan Sadhasivam
2025-10-31 13:38 ` Alex Elder
2025-10-13 15:35 ` [PATCH v2 6/7] riscv: dts: spacemit: add a PCIe regulator Alex Elder
2025-10-13 15:35 ` [PATCH v2 7/7] riscv: dts: spacemit: PCIe and PHY-related updates Alex Elder
2025-10-16 16:47 ` [PATCH v2 0/7] Introduce SpacemiT K1 PCIe phy and host controller Aurelien Jarno
2025-10-17 16:21 ` Alex Elder
2025-10-28 17:59 ` Aurelien Jarno
2025-10-28 18:42 ` Johannes Erdfelt
2025-10-28 19:10 ` Alex Elder
2025-10-28 20:48 ` Johannes Erdfelt
2025-10-28 20:49 ` Alex Elder
2025-10-30 16:41 ` Manivannan Sadhasivam
2025-10-30 17:49 ` Aurelien Jarno
2025-10-31 6:10 ` Manivannan Sadhasivam
2025-11-03 16:42 ` Alex Elder
2025-10-28 21:08 ` Aurelien Jarno
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