From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Roese Date: Fri, 14 Aug 2009 08:45:44 +0200 Subject: [U-Boot] PCIe switch questions In-Reply-To: <24962145.post@talk.nabble.com> References: <24962145.post@talk.nabble.com> Message-ID: <200908140845.44080.sr@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Friday 14 August 2009 01:33:57 dbrazeau wrote: > Hi. I'm planning on using a IDT PCIe switch on our custom board with a > PPC_460 cpu. I have searched the internet and haven't found much in the > way of references of using a IDT PCIe switch and a PPC with U-boot. I was > just wondering if I should expect any issue with U-Boot/Linux communicating > with devices connected to the PCIe switch. > > Are there special U-boot configuration requirement when using a PCIe > switch? I've looked online and in U-boot documentation and haven't seen a > whole lot of PCI configuration options except for the environment variable > pcie_mode and disabling the PCI bus altogether. > > I just wanted to get some input and thoughts on what I should expect once I > get the hardware. Thanks. I know of at least one project with an PPC4xx (405EX in this case) used with PCIe switches. IIRC, this is working fine in both U-Boot & Linux. So I wouldn't expect too many problems on 460EX. And if there should be some problem it should be possible to fix them. Cheers, Stefan -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-0 Fax: (+49)-8142-66989-80 Email: office at denx.de