linux-kernel - Re: [PATCH 0/6] PCI: Add legacy interrupt support in Keystone

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Date:   Mon, 17 May 2021 15:15:31 +0200
From:   Christian Gmeiner <christian.gmeiner@...il.com>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Marc Zyngier <maz@...nel.org>, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        Lokesh Vutla <lokeshvutla@...com>
Subject: Re: [PATCH 0/6] PCI: Add legacy interrupt support in Keystone

Hi

Am Do., 25. März 2021 um 10:04 Uhr schrieb Kishon Vijay Abraham I
<kishon@...com>:
>
> Keystone driver is used by K2G and AM65 and the interrupt handling of
> both of them is different. Add support to handle legacy interrupt for
> both K2G and AM65 here.
>
> Some discussions regarding this was already done here [1] and it was
> around having pulse interrupt for legacy interrupt.
>
> The HW interrupt line connected to GIC is a pulse interrupt whereas
> the legacy interrupts by definition is level interrupt. In order to
> provide level interrupt functionality to edge interrupt line, PCIe
> in AM654 has provided IRQ_EOI register. When the SW writes to IRQ_EOI
> register after handling the interrupt, the IP checks the state of
> legacy interrupt and re-triggers pulse interrupt invoking the handler
> again.
>
> Patch series also includes converting AM65 binding to YAML and an
> errata applicable for i2037.
>
> [1] -> https://lore.kernel.org/linux-arm-kernel/20190221101518.22604-4-kishon@ti.com/
>
> Kishon Vijay Abraham I (6):
>   dt-bindings: PCI: ti,am65: Add PCIe host mode dt-bindings for TI's
>     AM65 SoC
>   dt-bindings: PCI: ti,am65: Add PCIe endpoint mode dt-bindings for TI's
>     AM65 SoC
>   irqdomain: Export of_phandle_args_to_fwspec()
>   PCI: keystone: Convert to using hierarchy domain for legacy interrupts
>   PCI: keystone: Add PCI legacy interrupt support for AM654
>   PCI: keystone: Add workaround for Errata #i2037 (AM65x SR 1.0)
>
>  .../bindings/pci/ti,am65-pci-ep.yaml          |  80 ++++
>  .../bindings/pci/ti,am65-pci-host.yaml        | 111 ++++++
>  drivers/pci/controller/dwc/pci-keystone.c     | 343 +++++++++++++-----
>  include/linux/irqdomain.h                     |   2 +
>  kernel/irq/irqdomain.c                        |   6 +-
>  5 files changed, 440 insertions(+), 102 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/pci/ti,am65-pci-ep.yaml
>  create mode 100644 Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml
>
> --
> 2.17.1
>

Is there somewhere an updated version of this patch series?

-- 
greets
--
Christian Gmeiner, MSc

https://christian-gmeiner.info/privacypolicy