From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tabi Timur-B04825 Subject: Re: [PATCH] powerpc/85xx: clean up FPGA device tree nodes for Freecsale QorIQ boards Date: Wed, 31 Aug 2011 03:01:39 +0000 Message-ID: <4E5DA412.5020300@freescale.com> References: <1314644999-16955-1-git-send-email-timur@freescale.com> <3F34FBCD-3F0B-4D59-A947-C16CC812B42E@freescale.com> <4E5DA1CC.1020808@freescale.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Language: en-US Content-ID: <865097720B71CD459B531D63CB9C3B8C@freescale.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Sender: linuxppc-dev-bounces+glppe-linuxppc-embedded-2=m.gmane.org@lists.ozlabs.org Cc: "linuxppc-dev@ozlabs.org" , Gala Kumar-B11780 , "devicetree-discuss@lists.ozlabs.org" List-Id: devicetree@vger.kernel.org Kumar Gala wrote: > > On Aug 30, 2011, at 9:51 PM, Tabi Timur-B04825 wrote: > >> Kumar Gala wrote: >>> Do we really want the generic "fsl,fpga-cpld"& "fsl,fpga-pixis"? This seems to vague. >> >> Yes, the PIXIS is generally register compatible across all boards. There >> may be some minor differences, but the OCM driver can work with all PIXIS >> boards that have an PIXIS. > > Is this true? Don't we have pixis and ngpixis in u-boot? I forgot about that. Well, everything I said is true about the ngpixis, so I guess I should use "ngpixis" instead of just "pixis" here. I'll have to check if the old pixis can be used this way. > >>> Also you need "pixis" on MPC8544DS, MPC8572DS, MPC8536DS. >> >> Ok. >> >>> Also fpga-cpld makes no sense if we keep this. You are either a CPLD or FPGA not both. >> >> Then I don't understand what the CPLD is. > > http://en.wikipedia.org/wiki/Complex_programmable_logic_device Ok, I get it now. Is there a name for the CPLD we use on these chips? I'm having a hard time getting proper documentation on the CPLD. York expressed similar frustration. Perhaps these should be called board-control devices. How about fsl,boardcontrol-cpld fsl,boardcontrol-ngpixis fsl,boardcontrol-qixis -- Timur Tabi Linux kernel developer at Freescale