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README: remove recommendations to use sudo #36

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lorc merged 1 commit into from
Jun 3, 2025
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README: remove recommendations to use sudo #36

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15 changes: 8 additions & 7 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -57,15 +57,16 @@ install pyserial:
# sudo apt install python3-serial
```

You need to have the proper rights for access to serial devices
like `/dev/ttyUSB0`. As a general recommendation, a user has to
be added to the `dialout` group.

As for `pyftdi` it is a little more trickier, so please check the
pyftdi manual:
pyftdi manual for the installation and setting proper access rights:
<https://eblot.github.io/pyftdi/installation.html>. `pyftdi` required
only if you are planning to use CPLD control functionality, but we are
strongly suggest to install it.

Depending on your Linux configuration, you might need to run
`rcar_flash` as `root` to access your serial console device.

### Flashing your board

#### Choose your config
Expand Down Expand Up @@ -443,7 +444,7 @@ to the download mode, load flash_writer specified for h3ulcb_4x2, and stop.
After that, you may open your serial port and work with flash_writer.

```
sudo ./rcar_flash.py flash -c -f -b h3ulcb_4x2 -s /dev/ttyUSB0 none
./rcar_flash.py flash -c -f -b h3ulcb_4x2 -s /dev/ttyUSB0 none
```

Pay attention to the speed of the serial console. If the board supports
Expand Down Expand Up @@ -485,7 +486,7 @@ To boot into download mode on your Salvator X(S) board do the following:
6. Upload your bootloaders:

```
sudo ./rcar_flash.py flash -f -b h3_4x2 -s /dev/ttyUSB0 all
./rcar_flash.py flash -f -b h3_4x2 -s /dev/ttyUSB0 all
```

7. Power off the board again.
Expand Down Expand Up @@ -552,5 +553,5 @@ Flash only bl31 that has non-default name to the whitehawk

Flash all loaders to the spider (s4) board that supports CPLD to swith into the flashing mode
```
sudo ./rcar_flash.py flash -b s4 -c -f -s /dev/ttyUSB0 -p <path> all
./rcar_flash.py flash -b s4 -c -f -s /dev/ttyUSB0 -p <path> all
```