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Fix Tinker Board S (eMMC) boot (#650) (#845)

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* Fix Tinker Board S (eMMC) boot (#650)

Use Tinker Board S U-Boot configuration which is capable to boot from
eMMC as well as from SD card.

Note that this makes U-Boot always claiming to run on Tinker Board S:
..
Model: Rockchip RK3288 Asus Tinker Board S
..

It seems that there is no generic Tinker Board configuration. However,
Tinker Board S configuration really seems to work well with Tinker Board
as well, so just use it.

Also today the U-Boot Makefile seems to generate a working idbloader.img
already. Drop our special handling.

* Use Tinker Board S device tree if booting from eMMC for Linux

Instead of patching the Tinker Board device tree, select the device tree
based on what device we are booting from.

Note: This boots the non-S device tree when booting a Tinker Board S
from SD card! But there is no reliable detection otherwise, so let's
just live with that fact.

* Document how to use our U-Boot to flash eMMC
This commit is contained in:
Stefan Agner
2020-09-04 21:05:49 +02:00
committed by GitHub
parent a2a4cf8668
commit 2e2f6e893b
9 changed files with 151 additions and 63 deletions
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20
Documentation/boards/asus/README.md
View File

@@ -5,16 +5,26 @@
| Device | Release Date | Support | Config |
|----------------|---------------|---------|----------|
| Tinker RK3288 | April 2017 | yes | [tinker](../../../buildroot-external/configs/tinker_defconfig) |
| Tinker S RK3288| January 2018 | yes? | [tinker](../../../buildroot-external/configs/tinker_defconfig)? |
| Tinker S RK3288| January 2018 | yes | [tinker](../../../buildroot-external/configs/tinker_defconfig) |
| Tinker Edge T | November 2019 | no? | |
| Tinker Edge R | November 2019 | no? | |
(? is the Tinker S supported?)
<!--
## eMMC
eMMC support is provided transparently. Just flash the image to the eMMC by connecting your Tinker Board S to your PC via Micro-USB.
-->
eMMC support is provided with the same image. Just flash the image to the eMMC by connecting your Tinker Board S to your PC via Micro-USB. Refer to the Tinkerboard documentation how-to flash using Micro-USB and UMS.
The Home Assistant OS provided U-Boot does support UMS as well,
however manual intervention is necessary:
1. Set the jumper between Micro-USB and HDMI the maskrom mode
2. Insert SD card and connect the board via Micro-USB to your PC
3. Continusly press Ctrl+C to interrupt boot
4. Set the jumper back to the park position
5. Start UMS using:
```
ums 0 mmc 0
```
6. A mass storage device should appear. Flash Home Assistant OS to it.
## Serial console