Linux/DRA72: uboot-gpio,kernel-gpio

Cesar.Xi

Part Number: DRA72

Tool/software: Linux

Hi,

i set gpio output, high level on the uboot, and i test it is high on the uboot, but run to the kernel ,the gpio is low, where init the kernel.

the uboot set:

Regards,

Cesar

over 7 years ago

0 Cesar.Xi over 7 years ago

Expert 1455 points

e2e.ti.com/.../684056

0 Yordan Kamenov over 7 years ago in reply to Cesar.Xi

TI__Mastermind 42515 points

Hi Cesar,

thanks for updating the thread.

Regards,
Yordan

0 Vishal Mahaveer over 7 years ago in reply to Cesar.Xi

TI__Mastermind 33420 points

Hi Cesar,

The same can be achieved by adding below two properties to gpio<x> node in Kernel dts. This is better than modifying the hwmod file directly.
Example below for gpio7:

&gpio7 {
        ti,no-reset-on-init;
        ti,no-idle-on-init;
};

Regards,
Vishal

Processors

Processors forum

Linux/DRA72: uboot-gpio,kernel-gpio