Altera Arria10 hps

[x825]

I'm using Altera Arria10 hps, when I install the driver with debug mode define DEBUG, no massage showing or new device to i2c devices
/sys/bus/i2c/device/0-0020 not showing,

@lainwir3d requesting your kind support to addressing the issue and provide a solution.

[lainwir3d]

Hi x825,

There are no auto-detection, you have to provide a device-tree file containing the device description like this for example: https://github.com/lainwir3d/cy8c95xx/blob/master/cy8c95xx.dts

Another way is to manually register the device to the correct bus and correct device address (i2c-1 and 0x20 here for example):

echo gpio-cy8c95xx 0x20 > /sys/bus/i2c/devices/i2c-1/new_device

That's all I can say without more information.

Cheers

[x825]

I appreciate your kind support I added it manually
After that can't find the attribute in the path
-sh: can't open /sys/bus/i2c/devices/0-0020/ee_por_default: no such file
even after insmod the kernel module.

[lainwir3d]

It's weird. Are you sure 0x20 is the device address?

After you've inserted the module, when you do this: echo gpio-cy8c95xx 0x20 > /sys/bus/i2c/devices/i2c-1/new_device you need to replace 0x20 with your chip address on the i2c bus (0x20 is the default unless the PCB manufacturer has changed it), and you need to replace i2c-1 with the i2c bus the device in wired to on your pcb.