From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3E244FED.8020602@redswitch.com> Date: Tue, 14 Jan 2003 09:59:09 -0800 From: "Xiaogeng (Shawn) Jin" MIME-Version: 1.0 To: James Don Cc: "'linuxppc-embedded@lists.linuxppc.org'" Subject: Re: Configure 8xx_io in 2.4.21-pre3 References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Hi Jim, Thank you for your suggestions. I had a working 2.4.4 (released by DENX) kernel on my board, which has more stuff related to 8xx_io than 2.4.21-pre3. I don't know if those DENX-added stuff are necessary to enable 8xx CPM or if the 8xx_io code in 2.4.21 is sufficient to make 8xx CPM working. Probably I need to compare the code in these two versions line by line. - Shawn. > 1.) I recommend start with UART only build of the kernel first > > 2.) Did you check that your PA,PB,PC, and PD pins are set up properly ... > > I my custom board had pins moved for things like enet on SCC ? However > normally I believe SMC1 only can be on one pair of pins for a UART ... > another > > 3.) Another thing to look at is your BRG clock for your board ... in my > kernel I found mvista didn't look at the some parts of the hardware reset > word that divide down my 80 Mhz reference intenerally before it goes to the > brg ... I was really surprised this code wasn't there ... ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/