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For using a debug UART on the Wandboard CONFIG_MXC_UART=y must be set in the .config file. To avoid duplicate definitions move the setting from include/configs/wandboard.h to configs/wandboard_defconfig. Document the debug UART settings in the README. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Fabio Estevam <festevam@gmail.com>
50 lines
1.2 KiB
Plaintext
50 lines
1.2 KiB
Plaintext
U-Boot for Wandboard
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--------------------
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This file contains information for the port of U-Boot to the Wandboard.
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Wandboard is a development board that has three variants based on the following
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SoCs: mx6 quad, mx6 quad plus, mx6 dual lite and mx6 solo.
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For more details about Wandboard, please refer to:
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http://www.wandboard.org/
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Building U-Boot for Wandboard
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-----------------------------
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To build U-Boot for the Wandboard:
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$ make wandboard_config
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$ make
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Flashing U-Boot into the SD card
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--------------------------------
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- After the 'make' command completes, the generated 'SPL' binary must be
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flashed into the SD card;
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$ sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync
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(Note - the SD card node may vary, so adjust this as needed).
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- Flash the u-boot.img image into the SD card:
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sudo dd if=u-boot-dtb.img of=/dev/mmcblk0 bs=1k seek=69; sync
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- Insert the SD card into the slot located in the bottom of the board (same side
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as the mx6 processor)
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- Connect the serial cable to the host PC
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- Power up the board and U-Boot messages will appear in the serial console.
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Debug UART
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----------
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The following settings provide a debug UART for the Wandboard:
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CONFIG_DEBUG_UART=y
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CONFIG_DEBUG_UART_MXC=y
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CONFIG_DEBUG_UART_BASE=0x02020000
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CONFIG_DEBUG_UART_CLOCK=80000000
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