Microchip AT91 I2C experimental slave mode

configname: CONFIG_I2C_AT91_SLAVE_EXPERIMENTAL

Linux Kernel Configuration
└─>Device Drivers
└─>I2C support
└─>I2C Hardware Bus support
└─>Microchip AT91 I2C experimental slave mode
In linux kernel since version 5.1 (release Date: 2019-05-05)  
If you say yes to this option, support for the slave mode will be
added. Caution: do not use it for production. This feature has not
been tested in a heavy way, help wanted.
There are known bugs:
- It can hang, on a SAMA5D4, after several transfers.
- There are some mismtaches with a SAMA5D4 as slave and a SAMA5D2 as
master.