From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Wed, 16 Dec 2015 15:01:17 +0100 Subject: [U-Boot] [PATCH] nios2: display altera sysid at startup In-Reply-To: <56716AA4.6000201@wytron.com.tw> References: <1450253267-19625-1-git-send-email-thomas@wytron.com.tw> <201512161423.23814.marex@denx.de> <56716AA4.6000201@wytron.com.tw> Message-ID: <201512161501.17864.marex@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 Wednesday, December 16, 2015 at 02:44:04 PM, Thomas Chou wrote: > Hi Marek, > > On 2015?12?16? 21:23, Marek Vasut wrote: > > On Wednesday, December 16, 2015 at 02:10:26 PM, Thomas Chou wrote: > >> Hi Marek, > > > > Hi! > > > >> On 2015?12?16? 18:25, Marek Vasut wrote: > >>> On Wednesday, December 16, 2015 at 09:07:47 AM, Thomas Chou wrote: > >>>> Display altera sysid at startup, which was once removed during > >>>> the move. > >>>> > >>>> Signed-off-by: Thomas Chou > >>> > >>> What if the sysid block isn't part of the design ? > >> > >> If the sysid block is not present, nothing will display and it is not an > >> error. > > > > Won't this cause bus stall if you try to access unpopulated location ? > > It will be accessed though DT binding. As long as DT is correct, it > won't access unpopulated location. > > With the Altera Avalon bus, even a unpopulated access will not stall. OK! Thanks for clarifying. Acked-by: Marek Vasut Best regards, Marek Vasut