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{hw/i2c,docs/system/arm}: Allwinner TWI/I2C Emulation

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This patch implements Allwinner TWI/I2C controller emulation. Only
master-mode functionality is implemented.

The SPL boot for Cubieboard expects AXP209 PMIC on TWI0/I2C0 bus, so this is
first part enabling the TWI/I2C bus operation.

Since both Allwinner A10 and H3 use the same module, it is added for
both boards.

Docs are also updated for Cubieboard and Orangepi-PC board to indicate
I2C availability.

Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20221226220303.14420-4-strahinja.p.jankovic@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Strahinja Jankovic 2022-12-26 23:02:59 +01:00 • committed by Peter Maydell
parent edd3a59d5b
commit 9be8a82c0e
12 changed files with 551 additions and 1 deletions
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1
docs/system/arm/cubieboard.rst
View file

@ -14,3 +14,4 @@ Emulated devices:
- SDHCI
- USB controller
- SATA controller
- TWI (I2C) controller

1
docs/system/arm/orangepi.rst
View file

@ -25,6 +25,7 @@ The Orange Pi PC machine supports the following devices:
* Clock Control Unit
* System Control module
* Security Identifier device
* TWI (I2C)
Limitations
"""""""""""