Hi Am Do., 25. März 2021 um 10:04 Uhr schrieb Kishon Vijay Abraham I <kishon@xxxxxx>: > > 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@xxxxxx/ > > 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
