GPIO initialization in kernel

Sowmya BR

Intellectual 530 points

Hello all,

I am using am335x sitara starter kit. I need to initialize GPIO pin to blink an user LED.

I am able to export and assign value to GPIO through command line.

Please help me to write code in kernel driver.

Regards,

Sowmya

over 11 years ago

0 Miroslav Kiradzhiyski XID over 11 years ago

TI__Mastermind 25235 points

Hi Sowmya,

Here is a link to the GPIO Driver Guide for the TI AM335x SDK: http://processors.wiki.ti.com/index.php/GPIO_Driver_Guide

Best regards,
Miroslav

0 Sowmya BR over 11 years ago in reply to Miroslav Kiradzhiyski XID

Intellectual 530 points

Thank you for the reply.

I refereed to the document and i need to know , in which file i need to initialize and write my function?

Should I have to initialize in board-am335xevm.c file?

Regards,

Sowmya

0 Miroslav Kiradzhiyski XID over 11 years ago in reply to Sowmya BR

TI__Mastermind 25235 points

The board-am335xevm.c file should be used only for initialization. It's better if your blinking function is inside a separate kernel driver/module file. You will first need to have a basic understanding about writing kernel drivers/modules. There are plenty of materials on this topic online.

Best regards,
Miroslav

0 Sowmya BR over 11 years ago in reply to Miroslav Kiradzhiyski XID

Intellectual 530 points

Hi Miroslav,

Thank you for the reply.

Regards,

Sowmya

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GPIO initialization in kernel