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Merge changes Icf5e3045,Ie5fb0b72 into integration 

* changes:
  docs(allwinner): update SoC list and build options
  docs(allwinner): add SUNXI_SETUP_REGULATORS build option
This commit is contained in:
André Przywara 2022-01-06 19:14:29 +01:00 committed by TrustedFirmware Code Review
parent cbbcf9b118 f2b2cc146e
commit 4230998741
1 changed files with 51 additions and 8 deletions
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docs/plat/allwinner.rst
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@ -8,24 +8,67 @@ PSCI runtime services.
Building TF-A
-------------
To build for machines with an A64 or H5 SoC:
There is one build target per supported SoC:
+------+-------------------+
| SoC | TF-A build target |
+======+===================+
| A64 | sun50i_a64 |
+------+-------------------+
| H5 | sun50i_a64 |
+------+-------------------+
| H6 | sun50i_h6 |
+------+-------------------+
| H616 | sun50i_h616 |
+------+-------------------+
| H313 | sun50i_h616 |
+------+-------------------+
| R329 | sun50i_r329 |
+------+-------------------+
To build with the default settings for a particular SoC:
.. code:: shell
make CROSS_COMPILE=aarch64-linux-gnu- PLAT=sun50i_a64 DEBUG=1 bl31
make CROSS_COMPILE=aarch64-linux-gnu- PLAT=<build target> DEBUG=1
To build for machines with an H6 SoC:
So for instance to build for a board with the Allwinner A64 SoC::
.. code:: shell
make CROSS_COMPILE=aarch64-linux-gnu- PLAT=sun50i_a64 DEBUG=1
make CROSS_COMPILE=aarch64-linux-gnu- PLAT=sun50i_h6 DEBUG=1 bl31
Platform-specific build options
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To build for machines with an H616 or H313 SoC:
The default build options should generate a working firmware image. There are
some build options that allow to fine-tune the firmware, or to disable support
for optional features.
.. code:: shell
- ``SUNXI_PSCI_USE_NATIVE`` : Support direct control of the CPU cores powerdown
and powerup sequence by BL31. This requires either support for a code snippet
to be loaded into the ARISC SCP (A64, H5), or the power sequence control
registers to be programmed directly (H6, H616). This supports only basic
control, like core on/off and system off/reset.
This option defaults to 1. If an active SCP supporting the SCPI protocol
is detected at runtime, this control scheme will be ignored, and SCPI
will be used instead, unless support has been explicitly disabled.
make CROSS_COMPILE=aarch64-linux-gnu- PLAT=sun50i_h616 DEBUG=1 bl31
- ``SUNXI_PSCI_USE_SCPI`` : Support control of the CPU cores powerdown and
powerup sequence by talking to the SCP processor via the SCPI protocol.
This allows more advanced power saving techniques, like suspend to RAM.
This option defaults to 1 on SoCs that feature an SCP. If no SCP firmware
using the SCPI protocol is detected, the native sequence will be used
instead. If both native and SCPI methods are included, SCPI will be favoured
if SCP support is detected.
- ``SUNXI_SETUP_REGULATORS`` : On SoCs that typically ship with a PMIC
power management controller, BL31 tries to set up all needed power rails,
programming them to their respective voltages. That allows bootloader
software like U-Boot to ignore power control via the PMIC.
This setting defaults to 1. In some situations that enables too many
regulators, or some regulators need to be enabled in a very specific
sequence. To avoid problems with those boards, ``SUNXI_SETUP_REGULATORS``
can bet set to ``0`` on the build command line, to skip the PMIC setup
entirely. Any bootloader or OS would need to setup the PMIC on its own then.
Installation
------------