From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wenrui Li Subject: Re: [PATCH v3 1/2] Documentation: bindings: add dt doc for Rockchip PCIe controller Date: Thu, 16 Jun 2016 16:01:12 +0800 Message-ID: References: <1466041821-1649-1-git-send-email-shawn.lin@rock-chips.com> <5811436.gqkV56Lax5@wuerfel> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <5811436.gqkV56Lax5@wuerfel> Sender: linux-pci-owner@vger.kernel.org To: Arnd Bergmann , Shawn Lin Cc: Bjorn Helgaas , Marc Zyngier , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Heiko Stuebner , Doug Anderson , Rob Herring , devicetree@vger.kernel.org, Thomas Petazzoni List-Id: devicetree@vger.kernel.org =E5=9C=A8 2016/6/16 15:00, Arnd Bergmann =E5=86=99=E9=81=93: > On Thursday, June 16, 2016 9:50:21 AM CEST Shawn Lin wrote: > >> + reset-names =3D "core", "mgmt", "mgmt-sticky", "pipe"; >> + phys =3D <&pcie_phy>; >> + phy-names =3D "pcie-phy"; >> + pinctrl-names =3D "default"; >> + pinctrl-0 =3D <&pcie_clkreq>; >> + #interrupt-cells =3D <1>; >> + interrupt-controller; >> + interrupt-map-mask =3D <0 0 0 7>; >> + interrupt-map =3D <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 i= s that it's > most likely invalid for a device node to have both "interrupt-control= ler" > and "interrupt-map" properties. I originally thought this was a nice = way to > handle embedded irqchips within the PCIe host, but it only really wor= ks > 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=3D"pci" of course), and that makes the translation work a= s > expected. > > Arnd > Original driver have an irqchip as child node. But Marc suggested don't= =20 need an intermediate node here. Now the conclusion is to retain the child node? > >