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MPC8309 gpio interrupt

Question asked by wei yang on Dec 1, 2015
Latest reply on Dec 15, 2015 by Pavel Chubakov

Dear everyone

    I am new to use MPC8309, kernel version:2.6.33.7, BSP version:TWRMPC8309_Linux_BSP.zip.i want to use gpio as a interrupt function,from high level to low level as trigger condition,refer to MPC8309RM.pdf

 

i call request_irq(),function as follow:

request_irq() the second parameter only set up "IRQF_TRIGGER_LOW“,if set up "IRQF_TRIGGER_RISING" "IRQF_TRIGGER_FALLING" "IRQF_TRIGGER_HIGH"will cause error , error:"INVAL".

I used IRQ0、IRQ1.as follow:

 

but it no error, i see MPC8309RM.pdf,find System External Interrupt Control Register (SECNR)

the EDIx can set up  interrupt signals,but i do not find set up interrupt signals in System Internal Interrupt Control Register.

i do not know what different system external interrupt(IRQ0) and system internal interrupt(GPIO),and gpio can not set up  IRQF_TRIGGER_RISING" "IRQF_TRIGGER_FALLING" "IRQF_TRIGGER_HIGH" state, only set up IRQF_TRIGGER_LOW and not be change..

who can give me some advise ?

 

Have a good day .

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