AM5728: Disable GPIO Port in Linux

Ilya Fedusiv

Part Number: AM5728

Hi!

I want to disable few gpio ports in linux.
I'm using .dtb based on arch/arm/boot/dts/am572x-idk.dts

There I have this config:

&gpio8 {
	ti,no-idle;
	status = "disabled";
};

&gpio5 {
	ti,no-idle;
	status = "disabled";
};

System boots when I disabled only gpio8, but when adding gpio5 or gpio1 (these I tested). System is crashing in kernel boot process.

Can you please answer: what is the better way to disable gpio port from Linux?

Kind regards,
Ilya Fedusiv

over 3 years ago

0 Keerthy J over 3 years ago

TI__Guru**** 163290 points

Hi,

Could you please share the complete logs of the crash?

Also which version of SDK are you using?

Best Regards,

Keerthy

0 Ilya Fedusiv over 3 years ago in reply to Keerthy J

Prodigy 40 points

Hi,

Here is log of error: https://pastebin.com/FWGXuGVx

Linux processor-sdk 05.02.00.10

0 Keerthy J over 3 years ago in reply to Ilya Fedusiv

TI__Guru**** 163290 points

Hi,

I am unable to access the link. Please attach text file.

Also please check if one of the GPIOs from gpio1 or gpio5 being used for MMC or other critical modules impacting boot.

&pruss2_eth0_phy {
reset-gpios = <&gpio5 8 GPIO_ACTIVE_LOW>;
reset-assert-us = <2>; /* PHY datasheet states 1uS min */
};

&pruss2_eth1_phy {
reset-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;

in "arch/arm/boot/dts/am572x-idk.dts"

That might be crashing.

- Keerthy

Processors

Processors forum

AM5728: Disable GPIO Port in Linux