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https://github.com/brain-hackers/u-boot-brain
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![]() This function can fail if the device tree runs out of space. Rather than silently booting with an incomplete device tree, allow the failure to be detected. Unfortunately this involves changing a lot of places in the code. I have not changed behvaiour to return an error where one is not currently returned, to avoid unexpected breakage. Eventually it would be nice to allow boards to register functions to be called to update the device tree. This would avoid all the many functions to do this. However it's not clear yet if this should be done using driver model or with a linker list. This work is left for later. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Anatolij Gustschin <agust@denx.de> |
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Kconfig | ||
km83xx_i2c.c | ||
km83xx.c | ||
MAINTAINERS | ||
Makefile | ||
README.kmeter1 |
Keymile kmeter1 Board ----------------------------------------- 1. Alternative Boot EEPROM Upon the kmeter1 startup the I2C_1 controller is used to fetch the boot configuration from a serial EEPROM. During the development and debugging phase it might be helpful to apply an alternative boot configuration in a simple way. Therefore it is an alternative boot eeprom on the PIGGY, which can be activated by setting the "ST" jumper on the PIGGY board. 2. Memory Map BaseAddr PortSz Size Device ----------- ------ ----- ------ 0x0000_0000 64 bit 256MB DDR 0x8000_0000 8 bit 256KB GPIO/PIGGY on CS1 0xa000_0000 8 bit 256MB PAXE on CS3 0xe000_0000 2MB Int Mem Reg Space 0xf000_0000 16 bit 256MB FLASH on CS0 DDR-SDRAM: The current realization is made with four 16-bits memory devices. Mounting options have been foreseen for device architectures from 4Mx16 to 512Mx16. The kmeter1 is equipped with four 32Mx16 devices thus resulting in a total capacity of 256MBytes. 3. Compilation Assuming you're using BASH shell: export CROSS_COMPILE=your-cross-compile-prefix cd u-boot make distclean make kmeter1_config make 4. Downloading and Flashing Images 4.0 Download over serial line using Kermit: loadb [Drop to kermit: ^\c send <u-boot-bin-image> c ] Or via tftp: tftp 10000 u-boot.bin => run load Using UEC0 device TFTP from server 192.168.1.1; our IP address is 192.168.205.4 Filename '/tftpboot/kmeter1/u-boot.bin'. Load address: 0x200000 Loading: ############## done Bytes transferred = 204204 (31dac hex) => 4.1 Reflash U-boot Image using U-boot => run update ..... done Un-Protected 5 sectors ..... done Erased 5 sectors Copy to Flash... done ..... done Protected 5 sectors Total of 204204 bytes were the same Saving Environment to Flash... . done Un-Protected 1 sectors . done Un-Protected 1 sectors Erasing Flash... . done Erased 1 sectors Writing to Flash... done . done Protected 1 sectors . done Protected 1 sectors => 5. Notes 1) The console baudrate for kmeter1 is 115200bps.