linux-kernel - [PATCH] schemas: PCI: Add standard PCIe WAKE# signal

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Message-Id: <20250515090517.3506772-1-krishna.chundru@oss.qualcomm.com>
Date: Thu, 15 May 2025 14:35:17 +0530
From: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
To: andersson@...nel.org, robh@...nel.org, dmitry.baryshkov@...aro.org,
        manivannan.sadhasivam@...aro.org, krzk@...nel.org, helgaas@...nel.org
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        lpieralisi@...nel.org, kw@...ux.com, conor+dt@...nel.org,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree-spec@...r.kernel.org, quic_vbadigan@...cinc.com,
        sherry.sun@....com,
        Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Subject: [PATCH] schemas: PCI: Add standard PCIe WAKE# signal

As per PCIe spec 6, sec 5.3.3.2 document PCI standard WAKE# signal,
which is used to re-establish power and reference clocks to the
components within its domain.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
---
 dtschema/schemas/pci/pci-bus-common.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dtschema/schemas/pci/pci-bus-common.yaml b/dtschema/schemas/pci/pci-bus-common.yaml
index ca97a00..a39fafc 100644
--- a/dtschema/schemas/pci/pci-bus-common.yaml
+++ b/dtschema/schemas/pci/pci-bus-common.yaml
@@ -142,6 +142,10 @@ properties:
     description: GPIO controlled connection to PERST# signal
     maxItems: 1
 
+  wake-gpios:
+    description: GPIO controlled connection to WAKE# signal
+    maxItems: 1
+
   slot-power-limit-milliwatt:
     description:
       If present, specifies slot power limit in milliwatts.
-- 
2.34.1