i.MX ProcessorsのトピックRe: Handling GPIO interrupts in userspace on Linux with UIO

Handling GPIO interrupts in userspace on Linux with UIO

delauratfrançoi — Wed, 09 Mar 2016 16:56:51 GMT

Hello my name is François, Currently I work with imx6dl sabre. I want handle GPIO interrupts in userspace on linux with UIO.

I add in dts file

/ {

user_io {

compatible = "generic-uio";

status = "okay";

interrupt-parent=<&gpio7>;

interrupts = <12 2>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_hog_3>;

};

and I add uio_pdrv_genirq.of_id=generic-uio in bootarg.

and I add config CONFIG_UIO=y CONFIG_UIO_PDRV_GENIRQ=y in my kernel.

But after boot my /sys/class/uio directory is empty and I have not node /dev/uio0.

I don't understand why I have not node /dev/uio0.

Can you help me please.

Best Regards

François.

igorpadykov — Thu, 10 Mar 2016 08:41:42 GMT

Hi François

please try to load irq module as in example:

modprobe uio_pdrv_genirq of_id="mydevice,generic-uio,ui_pdrv"

Best regards

igor

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delauratfrançoi — Thu, 10 Mar 2016 13:45:46 GMT

Hello I tried modprobe command.

And I have the error :

uio_pdrv_genirq: `mydevice,generic-uio,ui_pdrv' invalid for parameter `of_id'

modprobe: can't load module uio_pdrv_genirq (kernel/drivers/uio/uio_pdrv_genirq.ko): Invalid argument

Can you help me please.

Best regards

François.

lingku — Mon, 20 Feb 2017 10:08:07 GMT

add following bootargs in bootloader args or dts file:

uio_pdrv_genirq.of_id=mydevice,generic-uio,ui_pdrv