> -----Original Message----- > From: Tanmay Upadhyay [mailto:tanmay.upadh...@einfochips.com] > Sent: Tuesday, April 20, 2010 11:21 AM > To: Prafulla Wadaskar > Cc: u-boot@lists.denx.de; Tanmay Upadhyay; Dhaval Vasa > Subject: [PATCH] OpenRD: Bring PCIe endpoint out of reset > > There exists PCIe endpoints(not all) that remains in reset state till > PERST# line (A11 on the PCIe connector) is hold low. They come out of > reset only when this line is high. > > In case of OpenRD, this line was in tri-state. So, some of the PCIe > devices would never appear on the PCIe bus. This patch makes PERST# > line high while booting to bring such PCIe devices out of reset. > > XGI Vollari Z11 GPU and Intel WiFi 4965 are the ones who doesn't care > about this line. Where as Broadcom's BCM970012 won't appear > on the PCIe > bus until PERST# is high. With this patch both kinds of device would > appear on the PCIe bus.
Well, there is some problem indeed on OpenRD board regarding PCIe. This patch did not helped me to test the hardware that I have. I have Matrox 550 graphics card on PCIe, I have enabled respective support in the kernel and tried to bring it up. This patch did not helped me for successful bring up. Whereas, if I use u-boot from official release (that comes with board) everything works fine. And that does not have this patch. So I think this is not perfect resolution for this problem. We need to dig more into the issue. Copying Simon.. Regards.. Prafulla . . _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot