[PATCH v5 11/16] dt-bindings: phy: qcom,qmp-pcie: add sc8280xp bindings

Johan Hovold
2022-11-05T15:03:21Z

Add bindings for the PCIe QMP PHYs found on SC8280XP.

The PCIe2 and PCIe3 controllers and PHYs on SC8280XP can be used in
4-lane mode or as separate controllers and PHYs in 2-lane mode (e.g. as
PCIe2A and PCIe2B).

The configuration for a specific system can be read from a TCSR register.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
.../phy/qcom,sc8280xp-qmp-pcie-phy.yaml | 165 ++++++++++++++++++
1 file changed, 165 insertions(+)
create mode 100644 Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml

diff --git a/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml
new file mode 100644
index 000000000000..80aa8d2507fb
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml
@@ -0,0 +1,165 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/qcom,sc8280xp-qmp-pcie-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm QMP PHY controller (PCIe, SC8280XP)
+
+maintainers:
+ - Vinod Koul <vkoul@kernel.org>
+
+description:
+ The QMP PHY controller supports physical layer functionality for a number of
+ controllers on Qualcomm chipsets, such as, PCIe, UFS, and USB.
+
+properties:
+ compatible:
+ enum:
+ - qcom,sc8280xp-qmp-gen3x1-pcie-phy
+ - qcom,sc8280xp-qmp-gen3x2-pcie-phy
+ - qcom,sc8280xp-qmp-gen3x4-pcie-phy
+
+ reg:
+ minItems: 1
+ maxItems: 2
+
+ clocks:
+ maxItems: 6
+
+ clock-names:
+ items:
+ - const: aux
+ - const: cfg_ahb
+ - const: ref
+ - const: rchng
+ - const: pipe
+ - const: pipediv2
+
+ power-domains:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ reset-names:
+ items:
+ - const: phy
+
+ vdda-phy-supply: true
+
+ vdda-pll-supply: true
+
+ qcom,4ln-config-sel:
+ description: PCIe 4-lane configuration
+ $ref: /schemas/types.yaml#/definitions/phandle-array
+ items:
+ - items:
+ - description: phandle of TCSR syscon
+ - description: offset of PCIe 4-lane configuration register
+ - description: offset of configuration bit for this PHY
+
+ "#clock-cells":
+ const: 0
+
+ clock-output-names:
+ maxItems: 1
+
+ "#phy-cells":
+ const: 0
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - power-domains
+ - resets
+ - reset-names
+ - vdda-phy-supply
+ - vdda-pll-supply
+ - "#clock-cells"
+ - clock-output-names
+ - "#phy-cells"
+
+additionalProperties: false
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - qcom,sc8280xp-qmp-gen3x4-pcie-phy
+ then:
+ properties:
+ reg:
+ items:
+ - description: port a
+ - description: port b
+ required:
+ - qcom,4ln-config-sel
+ else:
+ properties:
+ reg:
+ maxItems: 1
+
+examples:
+ - |
+ #include <dt-bindings/clock/qcom,gcc-sc8280xp.h>
+
+ pcie2b_phy: phy@1c18000 {
+ compatible = "qcom,sc8280xp-qmp-gen3x2-pcie-phy";
+ reg = <0x01c18000 0x2000>;
+
+ clocks = <&gcc GCC_PCIE_2B_AUX_CLK>,
+ <&gcc GCC_PCIE_2B_CFG_AHB_CLK>,
+ <&gcc GCC_PCIE_2A2B_CLKREF_CLK>,
+ <&gcc GCC_PCIE2B_PHY_RCHNG_CLK>,
+ <&gcc GCC_PCIE_2B_PIPE_CLK>,
+ <&gcc GCC_PCIE_2B_PIPEDIV2_CLK>;
+ clock-names = "aux", "cfg_ahb", "ref", "rchng",
+ "pipe", "pipediv2";
+
+ power-domains = <&gcc PCIE_2B_GDSC>;
+
+ resets = <&gcc GCC_PCIE_2B_PHY_BCR>;
+ reset-names = "phy";
+
+ vdda-phy-supply = <&vreg_l6d>;
+ vdda-pll-supply = <&vreg_l4d>;
+
+ #clock-cells = <0>;
+ clock-output-names = "pcie_2b_pipe_clk";
+
+ #phy-cells = <0>;
+ };
+
+ pcie2a_phy: phy@1c24000 {
+ compatible = "qcom,sc8280xp-qmp-gen3x4-pcie-phy";
+ reg = <0x01c24000 0x2000>, <0x01c26000 0x2000>;
+
+ clocks = <&gcc GCC_PCIE_2A_AUX_CLK>,
+ <&gcc GCC_PCIE_2A_CFG_AHB_CLK>,
+ <&gcc GCC_PCIE_2A2B_CLKREF_CLK>,
+ <&gcc GCC_PCIE2A_PHY_RCHNG_CLK>,
+ <&gcc GCC_PCIE_2A_PIPE_CLK>,
+ <&gcc GCC_PCIE_2A_PIPEDIV2_CLK>;
+ clock-names = "aux", "cfg_ahb", "ref", "rchng",
+ "pipe", "pipediv2";
+
+ power-domains = <&gcc PCIE_2A_GDSC>;
+
+ resets = <&gcc GCC_PCIE_2A_PHY_BCR>;
+ reset-names = "phy";
+
+ vdda-phy-supply = <&vreg_l6d>;
+ vdda-pll-supply = <&vreg_l4d>;
+
+ qcom,4ln-config-sel = <&tcsr 0xa044 0>;
+
+ #clock-cells = <0>;
+ clock-output-names = "pcie_2a_pipe_clk";
+
+ #phy-cells = <0>;
+ };
--
2.37.4