Re: [PATCH v3 1/5] dt-bindings: phy: qcom: add Nord QMP PCIe PHY binding
From: Shawn Guo
Date: Thu Sep 10 2026 - 02:50:17 EST
On Wed, Sep 09, 2026 at 05:18:16PM +0530, Krishna Chaitanya Chundru wrote:
> Document the PCIe PHY found on the Qualcomm Nord platform.
>
> Nord has a Gen5-capable QMP PCIe PHY that can operate in multiple
> lane configurations using four PHY segments (A/B/C/D). The active
> topology is selected by firmware through a TCSR configuration
> register and may be configured as x16, x8+x8, x8+x4+x4, or
> x8+x4+x2+x2.
>
> The binding describes the register regions, clocks, resets, power
> domains, regulators, PHY provider interface, clock provider interface,
> and the qcom,link-mode property used by the driver to discover the
> active lane configuration programmed by firmware.
>
> Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
> ---
> .../phy/qcom,nord-qmp-gen5x16-pcie-phy.yaml | 272 +++++++++++++++++++++
> 1 file changed, 272 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/phy/qcom,nord-qmp-gen5x16-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,nord-qmp-gen5x16-pcie-phy.yaml
> new file mode 100644
> index 000000000000..624ad7e7d13e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/qcom,nord-qmp-gen5x16-pcie-phy.yaml
> @@ -0,0 +1,272 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/qcom,nord-qmp-gen5x16-pcie-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Nord QMP Quadfurcated PCIe multiple link-mode PHY
> +
> +maintainers:
> + - Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
> +
> +description: |
Can we drop "|" like below?
@@ -9,7 +9,7 @@ title: Qualcomm Nord QMP Quadfurcated PCIe multiple link-mode PHY
maintainers:
- Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
-description: |
+description:
The Qualcomm Nord PCIe PHY is a Gen5-capable QMP PCIe PHY composed
of four PHY ports (A/B/C/D). The ports can be combined to support
multiple lane topologies, including x16, x8+x8, x8+x4+x4 and
@@ -101,7 +101,7 @@ properties:
vdda-pll-d-supply: true
qcom,link-mode:
- description: |
+ description:
Reference to the TCSR syscon and the offset of the
TCSR_PCIE_LINK_CONFIG_MODE register.
0 (QMP_PCIE_NORD_MODE_X16) — all ports ganged as x16
@@ -129,8 +129,8 @@ properties:
"#phy-cells":
const: 1
- description: |
- Selects the PHY instance by index:
+ description:
+ Selects the PHY instance by index.
0 — port A (up to Gen5 x8; anchor in x16 mode)
1 — port B (up to Gen5 x4)
2 — port C (up to Gen5 x2)
Shawn