[U-Boot] [PATCH V2] imx: mx7: Add support for USB and normal boot modes

[Fabio Estevam]

On Thu, Aug 31, 2017 at 10:35 AM, Fabio Estevam <festevam at gmail.com> wrote:
> Hi Eric,
>
> On Wed, Aug 30, 2017 at 7:13 PM, Eric Nelson <eric at nelint.com> wrote:
>> This adds support for two additional boot modes on the i.MX7D SoC, which
>> is most useful when doing U-Boot development on this chip.
>>
>> 1. "bmode usb" can be used to force the ROM boot loader's serial
>> 2. "bmode normal" can be used to revert to the normal boot mode
>>    as specified by fuses and BOOT_MODE pins
>>
>> Signed-off-by: Eric Nelson <eric at nelint.com>
>
> I tried testing your patch on a imx7d sabresd, but it seems there is
> an issue with bmode that is unrelated to your patch.
>
> I also did:
>
> diff --git a/configs/mx7dsabresd_defconfig b/configs/mx7dsabresd_defconfig
> index 8f2e33a..c70fde8 100644
> --- a/configs/mx7dsabresd_defconfig
> +++ b/configs/mx7dsabresd_defconfig
> @@ -5,7 +5,6 @@ CONFIG_VIDEO=y
>  # CONFIG_ARMV7_VIRT is not set
>  CONFIG_IMX_RDC=y
>  CONFIG_IMX_BOOTAUX=y
> -# CONFIG_CMD_BMODE is not set
>  CONFIG_DEFAULT_DEVICE_TREE="imx7d-sdb"
>  CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx7dsabresd/imximage.cfg"
>  CONFIG_BOOTDELAY=3
>
> so that bmode command can be added.
>
> However I am getting:
>
> => bmode usb
> bmode - <NULL>

I missed to add 'add_board_boot_modes(board_boot_modes);'

Now I get:

=> bmode usb
resetting ...


U-Boot 2017.09-rc2-36996-g63af4b0-dirty (Aug 31 2017 - 10:53:12 -0300)

CPU:   Freescale i.MX7D rev1.2 1000 MHz (running at 792 MHz)
CPU:   Commercial temperature grade (0C to 95C) at 41C
Reset cause: POR
Model: Freescale i.MX7 SabreSD Board
Board: i.MX7D SABRESD in non-secure mode
DRAM:  1 GiB
PMIC: PFUZE3000 DEV_ID=0x30 REV_ID=0x11
MMC:
MMC Device 0 not found
*** Warning - No MMC card found, using default environment

Video: 480x272x24
In:    serial
Out:   serial
Err:   serial
Net:   FEC0
Hit any key to stop autoboot:  0
=>

So the board is resetting instead of going into serial download mode.

Any ideas?

Thanks