u-boot-brain

History

Masahiro Yamada b75d8dc564 treewide: convert bd_t to struct bd_info by coccinelle The Linux coding style guide (Documentation/process/coding-style.rst) clearly says: It's a mistake to use typedef for structures and pointers. Besides, using typedef for structures is annoying when you try to make headers self-contained. Let's say you have the following function declaration in a header: void foo(bd_t bd); This is not self-contained since bd_t is not defined. To tell the compiler what 'bd_t' is, you need to include <asm/u-boot.h> #include <asm/u-boot.h> void foo(bd_t bd); Then, the include direcective pulls in more bloat needlessly. If you use 'struct bd_info' instead, it is enough to put a forward declaration as follows: struct bd_info; void foo(struct bd_info *bd); Right, typedef'ing bd_t is a mistake. I used coccinelle to generate this commit. The semantic patch that makes this change is as follows: <smpl> @@ typedef bd_t; @@ -bd_t +struct bd_info </smpl> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>		2020-07-17 09:30:13 -04:00
..
Kconfig	mx6: remove SYS_SOC from board Kconfig	2015-09-13 10:37:29 +02:00
MAINTAINERS	imx6: wandboard: add device tree	2019-04-13 20:30:09 +02:00
Makefile	wandboard: Rework Makefile to prevent spl.o from being built	2019-06-11 10:42:48 +02:00
README	arm: wandboard: move CONFIG_MXC_UART to defconfig	2020-06-22 17:43:31 +02:00
spl.c	treewide: convert bd_t to struct bd_info by coccinelle	2020-07-17 09:30:13 -04:00
wandboard.c	common: Drop linux/delay.h from common header	2020-05-18 21:19:23 -04:00

README

U-Boot for Wandboard
--------------------

This file contains information for the port of U-Boot to the Wandboard.

Wandboard is a development board that has three variants based on the following
SoCs: mx6 quad, mx6 quad plus, mx6 dual lite and mx6 solo.

For more details about Wandboard, please refer to:
http://www.wandboard.org/

Building U-Boot for Wandboard
-----------------------------

To build U-Boot for the Wandboard:

$ make wandboard_config
$ make

Flashing U-Boot into the SD card
--------------------------------

- After the 'make' command completes, the generated 'SPL' binary must be
flashed into the SD card;

$ sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync

(Note - the SD card node may vary, so adjust this as needed).

- Flash the u-boot.img image into the SD card:

sudo dd if=u-boot-dtb.img of=/dev/mmcblk0 bs=1k seek=69; sync

- Insert the SD card into the slot located in the bottom of the board (same side
as the mx6 processor)

- Connect the serial cable to the host PC

- Power up the board and U-Boot messages will appear in the serial console.

Debug UART
----------

The following settings provide a debug UART for the Wandboard:

CONFIG_DEBUG_UART=y
CONFIG_DEBUG_UART_MXC=y
CONFIG_DEBUG_UART_BASE=0x02020000
CONFIG_DEBUG_UART_CLOCK=80000000