I2C issues on Armbian for Nano Pi Neo2

[Kishore Saldanha]

Hi,

I am trying to interface I/O expander MCP23017 to Nano Pi Neo2(Hardware specs:1 GB RAM, Gigabit Ethernet . Software specs: Debian Buster with Armbian Linux 4.19.59-sunxi64
) .   The issue I am having is I am not able to see the device when I run sudo i2cdetect -y 0 . I have enabled i2c overlays in /boot/armbian.txt . 

I am using 10 K Ohm pull-ups on SDA and SCK . I get no activity while running i2cdetect on the oscilloscope on SCK and SDA lines . Is this an issue with the kernel ?

[guidol]

Shouldnt a problem with the kernel.
Why you didnt activate the overlay via armbian-config ==> system ==> hardware?

 

When you can execute i2cdetect - you already did install the i2c-tools

[Lubos Strapko]

I have the same issue, i2c is enabled in armbian-config, i am also getting a plenty of dmesg error after calling i2cdetect -y 0

 

[   54.872214] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x2, status: 0x0, addr: 0x3, flags: 0x0

[   54.931614] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0x4, flags: 0x0

[   54.973462] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0x5, flags: 0x0

[   55.031574] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0x6, flags: 0x0

[   55.073450] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0x7, flags: 0x0

[   55.113442] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0x8, flags: 0x0

[   55.153452] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0x9, flags: 0x0

[   55.193409] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0xa, flags: 0x0

[   55.233429] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0xb, flags: 0x0

[   55.273399] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0xc, flags: 0x0

[   55.313419] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0xd, flags: 0x0

[   55.353444] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0xe, flags: 0x0

[   55.393450] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0xf, flags: 0x0

[   55.431574] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x4, status: 0x0, addr: 0x10, flags: 0x0

 

Can anybody please tell me what "mv64xxx_i2c_fsm: Ctlr Error" means?