Hi Il mer 20 apr 2022, 21:49 Adam Ford <aford...@gmail.com> ha scritto:
> On Wed, Apr 20, 2022 at 2:40 PM Fabio Estevam <feste...@gmail.com> wrote: > > > > Hi Adam, > > > > Looking at your imx8mn beacon patches, it seems you managed to boot > > the imx8mn beacon board via serial download mode. > > > > I am trying to achieve the same on an imx8mn-evk running top of tree > > U-Boot and added the following changes: > > > > --- a/configs/imx8mn_evk_defconfig > > +++ b/configs/imx8mn_evk_defconfig > > @@ -50,11 +50,22 @@ CONFIG_CMD_GPIO=y > > CONFIG_CMD_I2C=y > > CONFIG_CMD_MMC=y > > CONFIG_CMD_CACHE=y > > +CONFIG_USB=y > > +# CONFIG_SPL_DM_USB is not set > > +CONFIG_USB_EHCI_HCD=y > > +CONFIG_USB_GADGET=y > > +CONFIG_USB_GADGET_MANUFACTURER="FSL" > > +CONFIG_USB_GADGET_VENDOR_NUM=0x0525 > > +CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5 > > +CONFIG_CI_UDC=y > > +CONFIG_SDP_LOADADDR=0x0 > > +CONFIG_OF_LIBFDT_OVERLAY=y > > CONFIG_CMD_REGULATOR=y > > CONFIG_CMD_EXT4_WRITE=y > > CONFIG_OF_CONTROL=y > > CONFIG_SPL_OF_CONTROL=y > > CONFIG_ENV_OVERWRITE=y > > +CONFIG_ENV_IS_NOWHERE=y > > CONFIG_ENV_IS_IN_MMC=y > > CONFIG_SYS_RELOC_GD_ENV_ADDR=y > > CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y > > > > Then I put the board into serial download mode and I run: > > > > $ sudo uuu flash.bin > > > > The following output appears on the console: > > > > U-Boot SPL 2022.04-00856-g246e03476ba3-dirty (Apr 20 2022 - 16:24:48 > -0300) > > SEC0: RNG instantiated > > Normal Boot > > WDT: Started watchdog@30280000 with servicing (60s timeout) > > Trying to boot from BOOTROM > > Find img info 0x&48020a00, size 872 > > Need continue download 1024 > > Download 694696, Total size 696232 > > NOTICE: BL31: v2.2(release):rel_imx_5.4.47_2.2.0-0-gc949a888e909 > > NOTICE: BL31: Built : 16:07:45, Apr 20 2022 > > > > What would be the other uuu command that needs to be run so that > > U-Boot proper can be loaded? > > I had to set the environmental variable for ENV is nowhere. There was > a bunch of discussion about the fact that the 8MN and 8MP have some > special code which makes the environmental variable location depend on > the boot device. A few of us went a few rounds, but Marek didn't like > our solution. > > Set CONFIG_ENV_IS_NOWHERE=y and rebuild. It will likely boot. > That code should be dropped because it's really buggy. We already sent several patches. I prefer some registered mechanism and not those board, arch etc function definition. Michael > > adam > > > > Thanks, > > > > Fabio Estevam >
