From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH] PCI: keystone: update to support multiple pci ports Date: Fri, 05 Sep 2014 21:00:19 +0200 Message-ID: <3654923.JrIGV2dJ70@wuerfel> References: <1409938782-31460-1-git-send-email-m-karicheri2@ti.com> <7260053.FoBVhTXVfj@wuerfel> <540A0212.6060303@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: <540A0212.6060303-l0cyMroinI0@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Murali Karicheri Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Mark Rutland , Pawel Moll , Ian Campbell , Rob Herring , Santosh Shilimkar , Kumar Gala , Bjorn Helgaas List-Id: devicetree@vger.kernel.org On Friday 05 September 2014 14:33:54 Murali Karicheri wrote: > > This looks like it's a shared register of some sort that doesn't > > really belong into the registers of a particular port. Could it > > be that it's actually for the PHY? > > > This a shared device configuration register between the two ports the > desciption states it is bootstrap configuration of the PCIe module as > Endpoint or Root complex and Not Phy. Hope below text will help. Ok. Why do you want to have this user-selectable though? Can't it just be set by the boot loader before starting Linux? Arnd > Table 3-23 Device Configuration Register (DEVCFG) > > > PCIESSMODE[1:0] 00b PCIESSMODE is used to control the > functionality of PCIESS module out of > reset. This MMR output is connected to > DEVTYPE input of PCIESS > (Changes from > Nysh) : Note that in Nysh this value came > from a bootstrap pin. > 00 : Endpoint > 01 : Legacy Endpoint > 10 : Rootcomplex > 11 : Reserved > PCIESS_1_MODE[1:0 > ] > 00b PCIESSMODE is used to control the > functionality of PCIE_1 module out of > reset. This MMR output is connected to > DEVTYPE input of PCIE_1 > 00 : Endpoint > 01 : Legacy Endpoint > 10 : Rootcomplex > 11 : Reserv > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html