On Thu, Jun 16, 2016 at 11:22:02AM +0200, Arnd Bergmann wrote: > On Thursday, June 16, 2016 4:01:12 PM CEST Wenrui Li wrote: > > 在 2016/6/16 15:00, Arnd Bergmann 写道: > > > On Thursday, June 16, 2016 9:50:21 AM CEST Shawn Lin wrote: > > > > > >> + reset-names = "core", "mgmt", "mgmt-sticky", "pipe"; > > >> + phys = <&pcie_phy>; > > >> + phy-names = "pcie-phy"; > > >> + pinctrl-names = "default"; > > >> + pinctrl-0 = <&pcie_clkreq>; > > >> + #interrupt-cells = <1>; > > >> + interrupt-controller; > > >> + interrupt-map-mask = <0 0 0 7>; > > >> + interrupt-map = <0 0 0 1 &pcie0 1>, > > >> + <0 0 0 2 &pcie0 2>, > > >> + <0 0 0 3 &pcie0 3>, > > >> + <0 0 0 4 &pcie0 4>; > > >> +}; > > >> > > > > > > One thing that came up in the review of the new Marvell PCIe driver is that it's > > > most likely invalid for a device node to have both "interrupt-controller" > > > and "interrupt-map" properties. I originally thought this was a nice way to > > > handle embedded irqchips within the PCIe host, but it only really works > > > by coincidence with the current kernel, and only as long as the hwirq number > > > of the irqchip matches the integer representation of the irq line in the root > > > bridge (which it does in the example above). > > > > > > For that driver we concluded that it would be less of a hack to have the > > > irqchip as a child node of the PCIe host after all (just not with > > > device_type="pci" of course), and that makes the translation work as > > > expected. > > > > > > Arnd > > > > > > > Original driver have an irqchip as child node. But Marc suggested don't > > need an intermediate node here. > > Now the conclusion is to retain the child node? > > That is at least my view of the situation, sorry for the mixed messages > you have been getting. Marc, Rob, do you agree with my finding? Yes, the OF interrupt mapping doc[1] parsing code treats things them as mutually exclusive. Rob [1] http://www.unixag-kl.fh-kl.de/~jkunz/tmp/imap0_9d.pdf -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
