Thanks Troy (and Peng),
On 08/31/2017 02:28 PM, Troy Kisky wrote:
On 8/31/2017 6:56 AM, Fabio Estevam wrote:
On Thu, Aug 31, 2017 at 10:35 AM, Fabio Estevam <feste...@gmail.com> wrote:
On Wed, Aug 30, 2017 at 7:13 PM, Eric Nelson <e...@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 <e...@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
Note the POR here (I would expect it to be WDOG).
Reset cause: POR
Model: Freescale i.MX7 SabreSD Board
Board: i.MX7D SABRESD in non-secure mode
DRAM: 1 GiB
<snip>
I got this response from Peng when I asked him back in March of last year.
For now, bmode does not work. Since bmode use warm reset, but we now use
wdog to directly reset pmic. So bmode will not work.
Please check your code to see whether your board connect WDOG_B to pmic reset
pin and have wdog
pinmux settings.
Thanks,
Peng.
Maybe if you change the WDOG pinmux it might work ?
The mx7dsabresd has GPIO1_IO00 configured for WDOG, and overriding it
does get rid of the POR.
Unfortunately, it also doesn't allow "bmode usb" to function.
=> mm 302c0000
302c0000: 00000003 ? 0
302c0004: 00000000 ? x
=> bmode usb
resetting ...
(crickets here)
Based on this:
Rejected-by: Eric Nelson <e...@nelint.com>
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