linux-kernel - [RFC,v14 0/5] Add DT based PCIe wake support in PCI core driver

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Date:   Wed, 8 Feb 2023 16:46:40 +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 0/5] Add DT based PCIe wake support in PCI core driver

Below series [1] attempted to support DT based PCIe wake feature in generic
PCI core driver. This series was left at v13 and final comments are not
addressed. I am continuing this series from v14 by addressing all comments
in v13. I dropped rockchip device tree patch because I don't have hardware
to verify it. Instead, I verified these patches on NVIDIA Jetson AGX Orin
Developer Kit and included its device tree changes in this series.

[1] https://lore.kernel.org/all/20171226023646.17722-1-jeffy.chen@rock-chips.com/

Changes in v14:
Updated commit message for DT bindings patch to reflect that DT properties
are tied to PCI-PCI Bridge.
Addressed review comments on PCI interrupt parsing patch.
Dropped rockchip device tree patch.
Added Jetson AGX OrinDeveloper Kit device tree and Tegra PMC patches.

Changes in v13:
Fix compiler error reported by kbuild test robot <fengguang.wu@...el.com>

Changes in v12:
Only add irq definitions for PCI devices and rewrite the commit message.
Enable the wake irq in noirq stage to avoid possible irq storm.

Changes in v11:
Address Brian's comments.
Only support 1-per-device PCIe WAKE# pin as suggested.
Move to pcie port as Brian suggested.

Changes in v10:
Use device_set_wakeup_capable() instead of device_set_wakeup_enable(),
since dedicated wakeirq will be lost in device_set_wakeup_enable(false).

Changes in v9:
Add section for PCI devices and rewrite the commit message.
Fix check error in .cleanup().
Move dedicated wakeirq setup to setup() callback and use
device_set_wakeup_enable() to enable/disable.
Rewrite the commit message.

Changes in v8:
Add optional "pci", and rewrite commit message.
Add pci-of.c and use platform_pm_ops to handle the PCIe WAKE# signal.
Rewrite the commit message.

Changes in v7:
Move PCIE_WAKE handling into pci core.

Changes in v6:
Fix device_init_wake error handling, and add some comments.

Changes in v5:
Move to pci.txt
Rebase.
Use "wakeup" instead of "wake"

Changes in v3:
Fix error handling.

Changes in v2:
Use dev_pm_set_dedicated_wake_irq.

Jeffy Chen (3):
  dt-bindings: PCI: Add definition of PCIe WAKE# irq and PCI irq
  of/irq: Adjust of_pci_irq parsing for multiple interrupts
  PCI / PM: Add support for the PCIe WAKE# signal for OF

Manikanta Maddireddy (2):
  arm64: tegra: Add PCIe port node with PCIe WAKE# for C1 controller
  soc/tegra: pmc: Add Tegra234 PCIe wake event

 Documentation/devicetree/bindings/pci/pci.txt |  8 +++
 .../nvidia/tegra234-p3737-0000+p3701-0000.dts | 11 ++++
 drivers/pci/of.c                              | 63 ++++++++++++++++++-
 drivers/pci/pci-driver.c                      | 10 +++
 drivers/pci/pci.c                             |  7 +++
 drivers/pci/pci.h                             |  8 +++
 drivers/soc/tegra/pmc.c                       |  1 +
 7 files changed, 105 insertions(+), 3 deletions(-)

-- 
2.25.1