Linux/TMDXIDK5728: PINMUX and AM572x IDK

VLeshka VV

Part Number: TMDXIDK5728

Tool/software: Linux

Hi!
I have to setup the AM572x IDK for 2xPRP interfaces. So, the two gigabit ethernet ports (GIGETH0 and GIGETH1) should be off, and two 10/100 Industrial ethernet ports (PRU1ETH0 and PRU1ETH1) should be on, by PINMUX (acording to the manual).
As I understand it, the pinmux tool generates the modules for rtos, but I need to for linux rt.

Acording to the link:
e2e.ti.com/.../758096

I need in mux.c file, but there are no any mux.c at board\ti\am57xx\ katalog (unlike the board\ti\am335x\).
Where to get the mix.c file?

over 6 years ago

0 Pavel Botev over 6 years ago

TI__Guru**** 170625 points

Hi VLeshka,

AM57x pinmux is done in below u-boot file:

u-boot-2018.01/board/ti/am57xx/mux_data.h

Refer to the below user guides for more info:

software-dl.ti.com/.../Foundational_Components_Tools.html

www.ti.com/.../sprac44a.pdf

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

Acording to your info, the mux_data.h is in [SDK]\board-support\u-boot-XXX\board\ti\am57xx.
But the make compiler ignores the modified mux_data.h.
How to attach the mux_data.h?

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka,

When building u-boot, make sure you follow below user guide:

software-dl.ti.com/.../Foundational_Components_U-Boot.html

Also, there is some EMAC/PRU_ETH pinmux info in below kernel DTS file. Please have a look and update if necessary for your use case.

{PSDK}/board-support/linux-4.x/arch/arm/boot/dts/am572x-idk-pps.dts

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

You said:
Also, there is some EMAC/PRU_ETH pinmux info in below kernel DTS file. Please have a look and update if necessary for your use case.

{PSDK}/board-support/linux-4.x/arch/arm/boot/dts/am572x-idk-pps.dts

but it doesn't apply to uboot, does it?

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka VV said:
{PSDK}/board-support/linux-4.x/arch/arm/boot/dts/am572x-idk-pps.dts

but it doesn't apply to uboot, does it?

This linux-4.x/arch/arm/boot/dts/am572x-idk-pps.dts file settings do NOT apply to u-boot

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

Let's take it in order.
You suggest I start with u-boot:

AM57x pinmux is done in below u-boot file:
u-boot-2018.01/board/ti/am57xx/mux_data.h

Then, you direct me to the core of the system.

So what should be done in order to:
two gigabit ethernet ports (GIGETH0 and GIGETH1) should be off, and two 10/100 Industrial ethernet ports (PRU1ETH0 and PRU1ETH1) should be on

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka,

Let we focus on u-boot for now. In u-boot, pinmux is done in mux_data.h file. You need to disable gigeth pinmux and enable prueth pinmux instead. For AM572x IDK board, the arrays are:

core_padconf_array_essential_am572x_idk[]
iodelay_cfg_array_am572x_idk[]

This pinmux settings are used in below file:

u-boot/board/ti/am57xx/board.c

Check also below user guides for more info:

www.ti.com/.../sprac44a.pdf
software-dl.ti.com/.../Foundational_Components_Tools.html

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

I determine to create two devicetree.txt by pinmux, compare it and clarify the changes for linux-4.x/arch/arm/boot/dts/am572x-idk-pps.dts:
1. Create by pinmux the devicetree1.txt file from file am572x_idk.pinmux (from ti.com). And the size of devicetree1.txt is precisely 20000 bytes.
2. I have turn on the PRUSS1_MII (turning off the interfering periphery), and create by pinmux the devicetree2.txt file. The size of devicetree2.txt is precisely 20000 bytes too!

And the content of devicetree1.txt and devicetree2.txt is the same!

Why?

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka,

I am not sure I understand your question. Is it related to u-boot? Or you are now fine with u-boot and proceed with kernel pinmux settings?

Why you create txt files? I would suggest you to modify am572x-idk-pps.dts per your needs.

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

About u-boot: I have modify the mux_data.h (using files genericFileFormatIOdelay.txt and genericFileFormatPadConf.txt from PinMux Tool).
Then I have made distclean (as compiler ignores the modified mux_data.h):
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- O=am57xx_idk am57xx_evm_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- O=am57xx_idk

About am572x-idk-pps.dts:
I have tried modify the am572x-idk-pps.dts using the differences between devicetree1.txt and devicetree2.txt (as described above). How do I change the am572x-idk-pps.dts?

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka,

"How do I change the am572x-idk-pps.dts?"

You can change it with gedit.

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

You're kidding. Direct question: how is exported pinmux files related to am572x-idk-pps.dts?

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

And please answer about bug about 20000 bytes at devicetree.txt files.

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka VV said:
how is exported pinmux files related to am572x-idk-pps.dts?

A partial devicetree format is generated for Processor SDK Linux and that should be manually patched into the reference devicetree file included with the linux kernel.

If you are not planning to use CPSW PPS, you should not use this DTS file at all, thus no need to manually edit.

Make sure you are aligned with below pinmux tool instructions:

Regards,
Pavel

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka VV said:
And please answer about bug about 20000 bytes at devicetree.txt files.

For bugs related to pinmux tool output file, please open new e2e thread and we will forward it to our pinmux expert.

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

I do not plan to add router functions (as I understood from your "CPSW PS").
Thank you for your encouraging words in the correctness of my actions.
I will study once again the actions.

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka,

am572x-idk-pps.dts is used only for Precision Time Protocol (PTP), refer to the below user guide for info:

software-dl.ti.com/.../Industrial_Protocols_PTP.html

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

Acording to the e2e.ti.com/.../2908446 :

Indexes 6 and 7 should be used for one prp (remoteproc6 and remoteproc7). I didn't understand why exactly 6 and 7, but I followed your advice, and it works fine.
As I understand it, for another prp it is also necessary to have exotic indexes. Please, prompt them.

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

What do I have to do to get you to answer the last question?

0 Pavel Botev over 6 years ago in reply to VLeshka VV

TI__Guru**** 170625 points

VLeshka VV said:
Acording to the e2e.ti.com/.../2908446 :

Indexes 6 and 7 should be used for one prp (remoteproc6 and remoteproc7). I didn't understand why exactly 6 and 7, but I followed your advice, and it works fine.
As I understand it, for another prp it is also necessary to have exotic indexes. Please, prompt them.

Your e2e thread subject is regarding AM57x pinmux. From what I understand your latest question is not related to pinmux settings, is that correct? If yes, please open new e2e thread regarding your new question.

Regards,
Pavel

0 VLeshka VV over 6 years ago in reply to Pavel Botev

Expert 1780 points

You're right. Okay, I'll create the new question.

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Linux/TMDXIDK5728: PINMUX and AM572x IDK