How to enable i2c adapters in riscv kernel,in SiFive Freedom U540

HiFive Unleashed
1

I want to enable the i2c adapters in SiFive unleashed Freedom U540 ,and how to add new i2c slave(EEPROM) to communication

2

Try to enable corresponding i2c peripherals in your device tree blob

3

But riscv architecture doesn’t have device tree blob

4

I don’t know how it works now, but the board I worked with does have DTB. In my case it is located inside FSBL.

Also SiFive HiFive Unleashed Getting Started Guide v1p1 tells that:

The FSBL contains an embedded DTB describing both the Freedom U500 SoC and HiFive Unleashed board.

5

There is a ‘new’ DTS/DTB format for the 5.2 kernel series, you can test it with the ‘dev/new-dts’ branch of freedom-u-sdk. If you are lucky it will just work, otherwise follow some of the threads here: https://lore.kernel.org/linux-riscv/20190614205846.GD17899@ninjato/

Also if this is not merged into the kernel that dev/new-dts is pointing at let me know and I’ll add the patch.