Date: Thu, 16 Dec 2021 11:12:01 -0800 From: Mark Millard via freebsd-arm <freebsd-arm@freebsd.org> To: bob prohaska <fbsd@www.zefox.net> Cc: freebsd-arm@freebsd.org Subject: Re: Saving environment variables in u-boot Message-ID: <214132DD-A095-4349-BB81-B79CB8CF6B0C@yahoo.com> In-Reply-To: <20211216180704.GA4173@www.zefox.net> References: <20211216180704.GA4173@www.zefox.net>
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On 2021-Dec-16, at 10:07, bob prohaska <fbsd@www.zefox.net> wrote: > How does one go about saving environment variables in u-boot on > Raspberry Pi 3? For example, > > Bus usb@7e980000: USB DWC2 > scanning bus usb@7e980000 for devices... 6 USB Device(s) found > scanning usb for storage devices... 0 Storage Device(s) found > U-Boot> editenv usb_pgood_delay > edit: 2 > U-Boot> usb reset > resetting USB... > Bus usb@7e980000: USB DWC2 > scanning bus usb@7e980000 for devices... 6 USB Device(s) found > scanning usb for storage devices... 1 Storage Device(s) found > U-Boot> saveenv > Saving Environment to FAT... Failed (1) I expect that is based on there being a microsd card with a FAT file system on it, possibly containing the u-boot that is in use. I doubt that it supports saving to a FAT on USB media. Do you have an appropriate microsd card in place? > U-Boot> > > It appears that setting usb_pgood_delay to 2 helped, so I'd like to > try it without manual intervention. > > It must be admitted that repeated manual tries of this experiment yield > inconsistent results, so this particular test case is mostly an example. > > Still, how does one change and save settings in u-boot? > Someone else that had such issues dealt with it by patching the the build instructions for the u-boot port involved and used their own port builds. What they reported was that they tried: QUOTE > # cat files/patch-include_configs_rpi.h > --- include/configs/rpi.h.orig 2021-06-12 23:20:03.061510000 -0000 > +++ include/configs/rpi.h 2021-06-12 23:20:14.131306000 -0000 > @@ -209,6 +209,9 @@ > ENV_DEVICE_SETTINGS \ > ENV_DFU_SETTINGS \ > ENV_MEM_LAYOUT_SETTINGS \ > + "usb_pgood_delay=10000\0" \ > + "usb_ready_retry=5\0" \ > + "usb_max_blk=20\0" \ > BOOTENV END QUOTE But that was for the u-boot-rpi4 or u-boot-rpi-arm64 ports. (They also later mentioned using "usb_pgood_delay=2000\0" instead, a figure they found in a bunch of configrations.) So something somewhat analogous might help if you are willing to build and use your own u-boot port variant. === Mark Millard marklmi at yahoo.com
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