How do I enumerate devices connected to i2c busses on running QEMU?

How do I enumerate devices connected to i2c busses on running QEMU?

[Paz Offer]

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Hi,

I want to enumerate all devices connected to i2c busses in running QEMU hosting Linux.
I understand I need to use 'qom-list' and 'qom-get' in monitor mode, but I did not find documentation on how to use them for specific information.

Thanks for any tip,
Paz

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Re: How do I enumerate devices connected to i2c busses on running QEMU?

[Philippe Mathieu-Daudé]

Hi Paz,

On 6/3/24 12:44, Paz Offer wrote:
> Hi,
> 
> I want to enumerate all devices connected to i2c busses in running QEMU 
> hosting Linux.
> I understand I need to use 'qom-list' and 'qom-get' in monitor mode, but 
> I did not find documentation on how to use them for specific information.

Try "info qtree":

$ qemu-system-i386 -M q35 -S -monitor stdio
(qemu) help info qtree
info qtree  -- show device tree
(qemu) info qtree
bus: main-system-bus
   type System
   dev: q35-pcihost, id ""
     bus: pcie.0
       dev: ICH9-SMB, id ""
         bus: i2c
           type i2c-bus
           dev: smbus-eeprom, id ""
             address = 87 (0x57)
           dev: smbus-eeprom, id ""
             address = 86 (0x56)
           dev: smbus-eeprom, id ""
             address = 85 (0x55)
           dev: smbus-eeprom, id ""
             address = 84 (0x54)
           dev: smbus-eeprom, id ""
             address = 83 (0x53)
           dev: smbus-eeprom, id ""
             address = 82 (0x52)
           dev: smbus-eeprom, id ""
             address = 81 (0x51)
           dev: smbus-eeprom, id ""
             address = 80 (0x50)

> 
> Thanks for any tip,
> Paz