linux-kernel - [RFC,v14 1/5] dt-bindings: PCI: Add definition of PCIe WAKE# irq and PCI irq

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Message-ID: <20230208111645.3863534-2-mmaddireddy@nvidia.com>
Date:   Wed, 8 Feb 2023 16:46:41 +0530
From:   Manikanta Maddireddy <mmaddireddy@...dia.com>
To:     <bhelgaas@...gle.com>, <thierry.reding@...il.com>,
        <petlozup@...dia.com>, <rafael.j.wysocki@...el.com>,
        <lpieralisi@...nel.org>, <robh@...nel.org>,
        <jeffy.chen@...k-chips.com>
CC:     <krzysztof.kozlowski+dt@...aro.org>, <jonathanh@...dia.com>,
        <dmitry.osipenko@...labora.com>, <viresh.kumar@...aro.org>,
        <gregkh@...uxfoundation.org>, <steven.price@....com>,
        <kw@...ux.com>, <linux-pci@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        <vidyas@...dia.com>, Manikanta Maddireddy <mmaddireddy@...dia.com>
Subject: [RFC,v14 1/5] dt-bindings: PCI: Add definition of PCIe WAKE# irq and PCI irq

From: Jeffy Chen <jeffy.chen@...k-chips.com>

Add device tree support to pass PCIe WAKE# pin information to PCI core
driver. To support PCIe WAKE# and PCI irqs, add definition of the optional
properties "interrupts" and "interrupt-names". These properties should be
defined by the PCIe port to which wake capable Endpoint is connected,
so the definition is added under "PCI-PCI Bridge properties" section.

Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
Signed-off-by: Manikanta Maddireddy <mmaddireddy@...dia.com>
Reviewed-by: Rob Herring <robh@...nel.org>
---

Changes in v14:
Move the device tree properties definition to "PCI-PCI Bridge properties"
section and also update commit message.

Changes in v13: None
Changes in v12:
Only add irq definitions for PCI devices and rewrite the commit message.

Changes in v11: None
Changes in v10: None
Changes in v9:
Add section for PCI devices and rewrite the commit message.

Changes in v8:
Add optional "pci", and rewrite commit message.

Changes in v7: None
Changes in v6: None
Changes in v5:
Move to pci.txt

Changes in v3: None
Changes in v2: None

 Documentation/devicetree/bindings/pci/pci.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/pci.txt b/Documentation/devicetree/bindings/pci/pci.txt
index 6a8f2874a24d..53bd559a7305 100644
--- a/Documentation/devicetree/bindings/pci/pci.txt
+++ b/Documentation/devicetree/bindings/pci/pci.txt
@@ -71,6 +71,14 @@ Optional properties:
    trusted with relaxed DMA protection, as users could easily attach
    malicious devices to this port.
 
+- interrupts: Interrupt specifier for each name in interrupt-names.
+- interrupt-names:
+    May contain "wakeup" for PCIe WAKE# interrupt and "pci" for PCI interrupt.
+    The PCI devices may optionally include an 'interrupts' property that
+    represents the legacy PCI interrupt. And when we try to specify the PCIe
+    WAKE# pin, a corresponding 'interrupt-names' property is required to
+    distinguish them.
+
 Example:
 
 pcie@...00000 {
-- 
2.25.1