From: pavan_savoy@indiatimes.com
To: linuxppc-dev@ozlabs.org
Subject: Hi Question on External Interrupts
Date: Thu, 15 May 2008 12:45:07 +0530 (IST) [thread overview]
Message-ID: <1655903468.17841210835707224.JavaMail.root@mbv7.indiatimes.com> (raw)
Hi,
being new to low level details of PPC, I have this doubt on the external Interrupt openPIC of some platform like mpc8540ads.
If at all, I request_irq on IRQ_EXT2 [say an example], and the interrupt handler is called, how do I know the line state of such an interrupt ? i.e is it low or high ?
Actually I want to interface a spi or i2c slave device which also connects via an external Interrupt which generates and interrupt and my actions are based upon knowing the line status.
[ Earlier interface was with arm architecture & GPIO and question must be naive].
Thanks
reply other threads:[~2008-05-15 7:35 UTC|newest]
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