MTK7620 i2c bus

[Anish Mangal]

Hi,

I was trying out the SECN firmware on an MTK7620 board (https://www.gl-inet.com/m7620n/#) and was trying to access the i2c bus. While building the firmware I noticed that there is a kernel module called i2c_ralink. I selected that, and also selected the i2c_gpio_custom to test with using custom gpios as i2c interface.

lsmod says that i2c_ralink is loaded but used by 0 and i2cdetect -l doesnt list any but. Then when I trying to use custom gpios as i2c with the following command

insmod i2c-gpio-custom bus0=0,1,2

but that doesnt seem to work

[  346.207363] i2c-gpio: probe of i2c-gpio.0 failed with error -16

Thoughts?

Best,

Anish

[nop...@gmail.com]

On Mar 25, 2017 1:05 AM, "Anish Mangal" <ani...@umich.edu> wrote:

insmod i2c-gpio-custom bus0=0,1,2

but that doesnt seem to work

[  346.207363] i2c-gpio: probe of i2c-gpio.0 failed with error -16

Thoughts?

System error number -16 should be EBUSY (Device or resource busy). You might check on contention for gpio ownership.