From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Simek Date: Tue, 31 May 2016 09:40:24 +0200 Subject: [U-Boot] [PATCH] env: Setup GD_FLG_ENV_DEFAULT flag when default environment are used In-Reply-To: <3AB374BF-57F5-4D80-A2BD-A45F07CC819F@suse.de> References: <574C962B.2090503@suse.de> <574D1B79.7090308@xilinx.com> <3AB374BF-57F5-4D80-A2BD-A45F07CC819F@suse.de> Message-ID: <574D3FE8.9090404@xilinx.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 31.5.2016 08:39, Alexander Graf wrote: > > >> Am 31.05.2016 um 07:04 schrieb Michal Simek : >> >>> On 30.5.2016 21:36, Alexander Graf wrote: >>> >>> >>>> On 05/30/2016 04:11 PM, Michal Simek wrote: >>>> Setup flag when default environment are used to be able to >>>> rewrite default distro boot variables based on SoC boot mode. >>>> >>>> Signed-off-by: Michal Simek >>>> --- >>>> >>>> I didn't find any way how to detect that default or saved variables are >>>> used. I want to have a flag to be able to rewrite boot_targets variable >>>> based on boot mode. Especially when SD boot mode is setup than SD should >>>> be primary boot devices, etc. >>>> When variables are saved boot_targets will be restored and SoC boot mode >>>> will be ignored. >>>> If you know better way how to do it, please let me know. >>> >>> You may want to be able to do the same from inside a script, so I guess >>> we should better have this as an environment variable itself again. >> >> Was there any environment in past? > > With again I meant "from C as well as from script". > >>> >>> There was a way to have environment variable reads return a value >>> directly from code rather than go via environment storage. I guess we >>> could expose the flag through that? >> >> If you expose environment variable and then run saveenv this variable >> will be saved and restored again and your script behaves the same. > > Not if we declare the environment variable read as callback ;). What do you mean? It is kind of interesting that this is not done already for others SoCs when you want to use distro config. :-) Cheers, Michal