@@ -17,6 +17,30 @@ description:
select: false
properties:
+ phys:
+ description:
+ There can be up to the number of possible lanes PHYs specified placed in
+ the phandle array in the line-based order. Obviously each the specified
+ PHYs are supposed to be able to work in the PCIe mode with a speed
+ implied by the DWC PCIe controller they are attached to.
+ minItems: 1
+ maxItems: 16
+
+ phy-names:
+ minItems: 1
+ maxItems: 16
+ oneOf:
+ - description: Generic PHY names
+ items:
+ pattern: '^pcie[0-9]+$'
+ - description:
+ Vendor-specific PHY names. Consider using the generic
+ names above for new bindings.
+ items:
+ oneOf:
+ - pattern: '^pcie(-?phy[0-9]*)?$'
+ - pattern: '^p2u-[0-7]$'
+
reset-gpio:
deprecated: true
description:
@@ -52,4 +52,7 @@ examples:
<0xdfc01000 0x0001000>, /* IP registers 2 */
<0xd0000000 0x2000000>; /* Configuration space */
reg-names = "dbi", "dbi2", "addr_space";
+
+ phys = <&pcie_phy0>, <&pcie_phy1>, <&pcie_phy2>, <&pcie_phy3>;
+ phy-names = "pcie0", "pcie1", "pcie2", "pcie3";
};
@@ -70,5 +70,8 @@ examples:
reset-gpios = <&port0 0 1>;
+ phys = <&pcie_phy>;
+ phy-names = "pcie";
+
num-lanes = <1>;
};
It's normal to have the DW PCIe RP/EP DT-nodes equipped with the explicit PHY phandle references. There can be up to 16 PHYs attach in accordance with the maximum number of supported PCIe lanes. Let's extend the common DW PCIe controller schema with the 'phys' and 'phy-names' properties definition. There two types PHY names are defined: preferred generic names '^pcie[0-9]+$' and non-preferred vendor-specific names '^pcie([0-9]+|-?phy[0-9]*)?$' so to match the names currently supported by the DW PCIe platform drivers ("pcie": meson; "pciephy": qcom, imx6; "pcie-phy": uniphier, rockchip, spear13xx; "pcie": intel-gw; "pcie-phy%d": keystone, dra7xx; "pcie": histb, etc). Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Reviewed-by: Rob Herring <robh@kernel.org> --- Changelog v3: - This is a new patch unpinned from the next one: https://lore.kernel.org/linux-pci/20220503214638.1895-2-Sergey.Semin@baikalelectronics.ru/ by the Rob' request. (@Rob) Changelog v5: - Add a note about having line-based PHY phandles order. (@Rob) - Prefer 'pcie[0-9]+' PHY-names over the rest of the cases. (@Rob) Changelog v6: - Add the Nvidia Tegra194-specific "p2u-[0-7]" phy-names too. (@DT-tbot) - Drop 'deprecated' keywords from the vendor-specific names. (@Rob) --- .../bindings/pci/snps,dw-pcie-common.yaml | 24 +++++++++++++++++++ .../bindings/pci/snps,dw-pcie-ep.yaml | 3 +++ .../devicetree/bindings/pci/snps,dw-pcie.yaml | 3 +++ 3 files changed, 30 insertions(+)