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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2001:8b0:10b:1:d65d:64ff:fe57:4e05 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.2 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: RE: Uart set up in PBL X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) > > Would it possible from the PBL to read the "baudrate" variable from the > environment? > > Normally, you would want to avoid doing anything, but the > bare minimum from PBL. Does the baudrate device parameter > work for you? > [Barbier, Renaud] Just to give you a bit more context. In our platform ARM (all non-pbl) or PPC, we add a call to do a PBIT memory test before starting barebox. The uart is initialized just before that at a fixed baud rate of 9600 bauds. Now we have a requirement to support more than one baud rate configurable by the user. And our next ARM based board is going to have a PBL. Are you saying that from the PBL, I can do something like baud=getenv("baudrate") to get the environment variable value. This would require to have /dev/env0 instantiated, would not it? Does not that require to have the environment init code (fs support and all) be compiled as part of the PBL (lwl-y +=....). My environment variables are in QSPI, so I would think I could parse the environment variable without the whole barebox support instead. If not possible then I think we can find some other way to retrieve the baud rate. Cheers. > Cheers, > Ahmad > > > > > Cheers, > > Renaud > > > > > > _______________________________________________ > > barebox mailing list > > barebox@lists.infradead.org > > > https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.infra > dead.org%2Fmailman%2Flistinfo%2Fbarebox&data=04%7C01%7Crenaud.b > arbier%40abaco.com%7C5feb6191d4d647f8afdb08d8df0d5b4c%7Ce6f2745189 > 9d4d0db8fa88baafa551a7%7C0%7C0%7C637504595763337955%7CUnknown% > 7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiL > CJXVCI6Mn0%3D%7C1000&sdata=U5XVs%2Bf0L4t6LX49D7IJZNexAa77Pkjy > kZv74%2FJ8klk%3D&reserved=0 > > > > -- > Pengutronix e.K. | | > Steuerwalder Str. 21 | > https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pen > gutronix.de%2F&data=04%7C01%7Crenaud.barbier%40abaco.com%7C5fe > b6191d4d647f8afdb08d8df0d5b4c%7Ce6f27451899d4d0db8fa88baafa551a7%7 > C0%7C0%7C637504595763337955%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC > 4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&a > mp;sdata=H1Ifw3D43oCbwUMkyKECroRAm22bBXka2wbBMGFhM%2BE%3D&a > mp;reserved=0 | > 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | > Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox