On 08/10/2015 10:48 AM, Ran Shalit wrote:
> Hello,
>
> MPC8349 has general IRQ numbered 0-7,
> It is required to bind these IRQs with some routine , i.e. they are
> not used with any specific driver.
>
> - Should they be configured as gpios in device tree so that we can use
> the gpio as irq in linux ? Is there any example ?
If it's a gpio then yes, you need to use it as a gpio. Not familiar with
MPC8349,
but newer FSL chips can select between gpio or irq through a RCW field
(IRQ_BASE?).
Note that for gpios there's special apis, such as: of_get_gpio(),
gpio_request_one() a.s.o.
Also you'll need to update your device tree node to something like:
intc2@0{
compatible = "intc2";
reg = <0 0x1000>;
gpios = <&gpio0 4 0>;
};
See Documentation/gpio.txt for more info.
---
Best Regards, Laurentiu
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