[U-Boot] DeAsserting UART Interrupt line on OMAP3530 for uboot

[U-Boot] DeAsserting UART Interrupt line on OMAP3530 for uboot

[Rahanesh]

Hi all,

Can anyone help me to de-assert  the uart interrupt line.

I have enabled the UART interrupt only for reception of data.

Processor get the interrupt and data is read to a local buffer. Since the
Interrupt line is not deasserted , i keep on getting the same interrupt. 

How can i deassert the UART interrupt in OMAP 3530? Is it in the UART side
or Interrupt Controller Side?

How does Ubot handle this? How is the Interrupt line cleared in Uboot?

 

Please help .

 

These are the UART configuration values which i used .

8 data bits and  2 stop bits, 

FIFO enabled. 56 Byte RX FIFO and 8 Byte TX FIFO. 


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[U-Boot] DeAsserting UART Interrupt line on OMAP3530 for uboot

[Nishanth Menon]

Rahanesh said the following on 03/05/2009 04:21 PM:
> Can anyone help me to de-assert  the uart interrupt line.
>   
Please read the OMAP3530 TRM. it explains how to handle the UART registers.
> I have enabled the UART interrupt only for reception of data.
>
> Processor get the interrupt and data is read to a local buffer. Since the
> Interrupt line is not deasserted , i keep on getting the same interrupt. 
>
> How can i deassert the UART interrupt in OMAP 3530? Is it in the UART side
> or Interrupt Controller Side?
>
> How does Ubot handle this? How is the Interrupt line cleared in Uboot?
>
>   
I would recommend doing the following:
git clone  git://git.denx.de/u-boot.git
vim drivers/serial/ns16550.c
You'd see that it is not using interrupts, it does a poll on interrupt
status register..

Regards,
Nishanth Menon