MPC8309 gpio interrupt

威杨 — Wed, 02 Dec 2015 01:12:41 GMT

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 .

Re: MPC8309 gpio interrupt

Pavel — Tue, 15 Dec 2015 07:06:02 GMT

The MPC8309 IRQ0 is used as interrupt from MPR121 touch screen on Display Module. See the TWR-MPC8309 dts file.

Look at attached file. The TWRMPC8309_Linux_BSP does not support sys/dev possibility for GPIO. Use Generic GPIO API. Is there problem for using gpio_is_valid or gpio_request procedures.

Have a great day,
Pavel

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