diff options
author | Dzmitry Sankouski <dsankouski@gmail.com> | 2022-02-22 21:49:53 +0300 |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2022-04-04 15:06:11 -0400 |
commit | f8a1b33889a2ed880062d9960a68718463093de6 (patch) | |
tree | d89daf02652ac47bf9af42f0b296e051d093509c /arch/arm/dts/sdm845.dtsi | |
parent | 12a3e1ada06c702c403cf1eebb063ef7a34688cd (diff) |
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>
Diffstat (limited to 'arch/arm/dts/sdm845.dtsi')
-rw-r--r-- | arch/arm/dts/sdm845.dtsi | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/arm/dts/sdm845.dtsi b/arch/arm/dts/sdm845.dtsi index 1185b71216..6f2fb20d68 100644 --- a/arch/arm/dts/sdm845.dtsi +++ b/arch/arm/dts/sdm845.dtsi @@ -48,10 +48,8 @@ /* DEBUG UART */ qup_uart9: qup-uart9-default { - pinmux { - pins = "GPIO_4", "GPIO_5"; - function = "qup9"; - }; + pins = "GPIO_4", "GPIO_5"; + function = "gpio"; }; }; |