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dt-bindings: PCI: qcom: Move PHY & reset GPIO to Root Port node

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Move the phys, phy-names, reset-gpios properties to the PCIe Root Port node
from Host Bridge node, as agreed upon here [1].

Update the qcom,pcie-common.yaml to include the 'phys' property in the Root
Port node. 'phy-names' property is not needed in Root Port since each Root
Port supports only one PHY. Also, there is already 'reset-gpios' property
defined for PERST# in pci-bus-common.yaml, so use that property instead of
'perst-gpios'.

For backward compatibility, do not remove any existing properties in the
bridge node, but mark them as 'deprecated' instead.

[1] https://lore.kernel.org/linux-pci/20241211192014.GA3302752@bhelgaas/

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
[mani: commit message rewording]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20250702-perst-v5-1-920b3d1f6ee1@qti.qualcomm.com
This commit is contained in:
Krishna Chaitanya Chundru 2025-07-02 16:50:41 +05:30 committed by Bjorn Helgaas
parent 7d944c0f14
commit 38fcbfbd42
2 changed files with 42 additions and 6 deletions
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32
Documentation/devicetree/bindings/pci/qcom,pcie-common.yaml
View File

@ -51,10 +51,18 @@ properties:
phys:
maxItems: 1
deprecated: true
description:
This property is deprecated, instead of referencing this property from
the host bridge node, use the property from the PCIe root port node.
phy-names:
items:
- const: pciephy
deprecated: true
description:
Phandle to the register map node. This property is deprecated, and not
required to add in the root port also, as the root port has only one phy.
power-domains:
maxItems: 1
@ -71,12 +79,18 @@ properties:
maxItems: 12
perst-gpios:
description: GPIO controlled connection to PERST# signal
description: GPIO controlled connection to PERST# signal. This property is
deprecated, instead of referencing this property from the host bridge node,
use the reset-gpios property from the root port node.
maxItems: 1
deprecated: true
wake-gpios:
description: GPIO controlled connection to WAKE# signal
description: GPIO controlled connection to WAKE# signal. This property is
deprecated, instead of referencing this property from the host bridge node,
use the property from the PCIe root port node.
maxItems: 1
deprecated: true
vddpe-3v3-supply:
description: PCIe endpoint power supply
@ -85,6 +99,20 @@ properties:
opp-table:
type: object
patternProperties:
"^pcie@":
type: object
$ref: /schemas/pci/pci-pci-bridge.yaml#
properties:
reg:
maxItems: 1
phys:
maxItems: 1
unevaluatedProperties: false
required:
- reg
- reg-names

16
Documentation/devicetree/bindings/pci/qcom,pcie-sc7280.yaml
View File

@ -165,9 +165,6 @@ examples:
iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,
<0x100 &apps_smmu 0x1c81 0x1>;
phys = <&pcie1_phy>;
phy-names = "pciephy";
pinctrl-names = "default";
pinctrl-0 = <&pcie1_clkreq_n>;
@ -176,7 +173,18 @@ examples:
resets = <&gcc GCC_PCIE_1_BCR>;
reset-names = "pci";
perst-gpios = <&tlmm 2 GPIO_ACTIVE_LOW>;
vddpe-3v3-supply = <&pp3300_ssd>;
pcie1_port0: pcie@0 {
device_type = "pci";
reg = <0x0 0x0 0x0 0x0 0x0>;
bus-range = <0x01 0xff>;
#address-cells = <3>;
#size-cells = <2>;
ranges;
phys = <&pcie1_phy>;
reset-gpios = <&tlmm 2 GPIO_ACTIVE_LOW>;
};
};
};