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u-boot/board/warp7
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Fabio Estevam e077b3ba4d warp7: Fix the write to the LDOGCTL PMIC register 
The third parameter of the pmic_clrsetbits() function is the mask
to the register and the correct mask is 1 not 0.

Since the LDOGCTL only contains a single valid bit (bit 0),
we can use pmic_reg_write() and write 1 directly, which fixes
the problem in a simpler way and use the original pmic function
that was used prior to the DM PMIC conversion.

Fixes: 8ba377321c ("arm: imx7s-warp: Convert to DM PMIC")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
2019-03-13 09:14:35 +01:00
..
imximage.cfg SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
Kconfig warp7: Add Kconfig WARP7_ROOT_PART 2018-04-26 08:53:22 +02:00
MAINTAINERS warp7: MAINTAINERS: Add an entry for warp7_bl33_defconfig 2018-10-24 10:03:06 +02:00
Makefile SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
README warp7: README: Adjust the binary name after DM conversion 2019-03-13 09:14:35 +01:00
warp7.c warp7: Fix the write to the LDOGCTL PMIC register 2019-03-13 09:14:35 +01:00

README 

How to Update U-Boot on Warp7 board
----------------------------------

Required software on the host PC:

- imx_usb_loader: https://github.com/boundarydevices/imx_usb_loader

- dfu-util: http://dfu-util.sourceforge.net/releases/ (if you are in a
Debian distribution then you can get it via libdfu-dev package)

- libusb: http://libusb.org/ (if you are in a Debian distribution
then you can get it via libusb-dev and libusb-1.0-0-dev)

In U-Boot folder, build U-Boot for Warp7:

$ make mrproper
$ make warp7_config
$ make

This will generate the U-Boot binary called u-boot-dtb.imx.

Put warp7 board in USB download mode: 

Remove the CPU board from the base board then put switch 2 in the upper
position

Connect a USB to serial adapter between the host PC and warp7

Connect a USB cable between the OTG warp7 port and the host PC

Copy u-boot-dtb.imx to the imx_usb_loader folder.

Load u-boot-dtb.imx via USB:

$ sudo ./imx_usb u-boot-dtb.imx

Then U-Boot should start and its messages will appear in the console program.

Open a terminal program such as minicom

Use the default environment variables:

=> env default -f -a
=> saveenv

Run the DFU command:
=> dfu 0 mmc 0

Transfer u-boot-dtb.imx that will be flashed into the eMMC:

$ sudo dfu-util -D u-boot-dtb.imx -a boot

Then on the U-Boot prompt the following message should be seen after a
successful upgrade:

#DOWNLOAD ... OK
Ctrl+C to exit ...

Remove power from the warp7 board.

Put warp7 board into normal boot mode (put the switch 2 in the lower position)

Power up the board and the new updated U-Boot should boot from eMMC