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u-boot/arch/arm/dts/starqltechn.dts
Dzmitry Sankouski f8a1b33889 board: starqltechn: get board usable - add bootcmd and docs
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>
2022-04-04 15:06:11 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Samsung S9 SM-G9600 (starqltechn) board device tree source
*
* (C) Copyright 2021 Dzmitry Sankouski <dsankouski@gmail.com>
*
*/
/dts-v1/;
#include "sdm845.dtsi"
/ {
model = "Samsung S9 (SM-G9600)";
compatible = "qcom,sdm845-mtp", "qcom,sdm845", "qcom,mtp";
#address-cells = <2>;
#size-cells = <2>;
chosen {
stdout-path = "serial0:921600n8";
};
aliases {
serial0 = &debug_uart;
};
memory {
device_type = "memory";
reg = <0 0x80000000 0 0xfe1bffff>;
};
psci {
compatible = "arm,psci-1.0";
method = "smc";
};
framebuffer: framebuffer@9D400000 {
compatible = "simple-framebuffer";
reg = <0 0x9D400000 0 (2960 * 1440 * 4)>;//2400000
width = <1440>;
height = <2960>;
stride = <(1440 * 4)>;
format = "a8r8g8b8";
};
soc: soc {
serial@a84000 {
status = "okay";
};
pinctrl@3900000 {
muic_i2c: muic_i2c {
pins = "GPIO_33", "GPIO_34";
drive-strength = <0x2>;
function = "gpio";
bias-disable;
};
};
};
};
#include "starqltechn-uboot.dtsi"