topic LS1046A How to enable I2C4 automatically in RCW in Layerscape

LS1046A How to enable I2C4 automatically in RCW

Darren_P — Fri, 05 Nov 2021 10:28:30 GMT

Hi NXP,

As title. How can I enable I2C4 automatically in RCW?

I found "Extended RCW PinMux Control Register" in reference manual.

Address: 157_0000h base + 40Ch offset = 157_040Ch.

What's the command format set in RCW?

And if we didn't enable I2C4 function in boot stage. Does that mean I can't use I2C4 control when the system is in user space.

Thanks!!

Pavel — Fri, 05 Nov 2021 15:28:09 GMT

The LS1046a RCW does not have bits for I2C4 pins assignment.

Use the DEVDISR5 Register. See the Section 12.3.10 of the LS1046a Reference Manual.

Use the SCFG_RCWPMUXCR0 register. See the Section 11.3.41.

Darren_P — Mon, 08 Nov 2021 09:03:57 GMT

Hi Pavel,

Yes I understand those registers. My question is how can I enable those functions in RCW?

I noticed there's a pbi section which allows me to send some commands.

Here's my command format. write 0x0157040C, 0x00000000. But it doesn't work.

Is my understanding for how to enable I2C4 wrong?

Darren

Pavel — Wed, 10 Nov 2021 09:41:09 GMT

Add .pbl writing to RCW. Attached file contains RCW example for I2C4 pins enabling.

Path for this file in LSDK 2108 is the following:

flexbuild_lsdk2108/components/firmware/rcw/ls1046ardb/RR_FFSSPPPH_1133_5559

See information about files using for building in the following file:

flexbuild_lsdk2108/configs/board/ls1046ardb/manifest

Use the following command sequence for RCW, ATF and .img building:

flex-builder -c rcw -m ls1046ardb -b sd

flex-builder -c atf -m ls1046ardb -b sd

flex-builder -i mkfw -m ls1046ardb -b sd