mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 18:28:55 +00:00
f8a1b33889
U-boot is intended to replace linux kernel in android boot image(ABL), and it's FIT payload to replace initramfs file. The boot process is similar to boot image with linux: - android bootloader (ABL) unpacks android boot image - ABL sets `linux,initrd-start property` in chosen node in unpacked FDT - ABL sets x0 register to FDT address, and passes control to u-boot - u-boot reads x0 register, and stores it in `prevbl_fdt_addr` env variable - u-boot reads `linux,initrd-start` property, and stores it in `prevbl_initrd_start_addr` In this way, u-boot bootcmd relies on `prevbl_initrd_start_addr` env variable, and boils down to `bootm $prevbl_initrd_start_addr`. If more control on boot process is desired, pack a boot script in FIT image, and put it to default configuration What done: - strip unneeded config options - add FIT image support - add framebuffer node, u-boot logo and video console - increase LMB_MAX_REGIONS, to store all linux dtb reserved memory regions - add linux kernel image header Uart driver causes hang, when u-boot is used in android boot image instead of linux. Temporary disable console driver, until investigated and fixed. Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com> Cc: Ramon Fried <rfried.dev@gmail.com>
42 lines
663 B
Text
42 lines
663 B
Text
// SPDX-License-Identifier: GPL-2.0+
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/*
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* U-Boot addition to handle Samsung S9 SM-G9600 (starqltechn) pins
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*
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* (C) Copyright 2021 Dzmitry Sankouski <dsankouski@gmail.com>
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*
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*/
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/
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{
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framebuffer@9D400000 {
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u-boot,dm-pre-reloc;
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};
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soc {
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u-boot,dm-pre-reloc;
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serial@a84000 {
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u-boot,dm-pre-reloc;
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};
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gcc {
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clock-controller@100000 {
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u-boot,dm-pre-reloc;
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};
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gpio_north@3900000 {
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u-boot,dm-pre-reloc;
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};
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pinctrl@3900000 {
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u-boot,dm-pre-reloc;
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};
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};
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};
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};
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&pm8998_pon {
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key_vol_down {
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gpios = <&pm8998_pon 1 0>;
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label = "key_vol_down";
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};
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key_power {
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gpios = <&pm8998_pon 0 0>;
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label = "key_power";
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};
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};
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