Re: [PATCH net-next 2/2] net: phy: sfp: enable i2c-bus detection on ACPI based systems

Mika Westerberg writes:

On Sun, May 05, 2019 at 03:05:23PM -0700, Ruslan Babayev wrote:

quoted

Lookup I2C adapter using the "i2c-bus" device property on ACPI based
systems similar to how it's done with DT.

An example DSD describing an SFP on an ACPI based system:

Device (SFP0)
{
    Name (_HID, "PRP0001")
    Name (_DSD, Package ()
    {
        ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
        Package () {
            Package () { "compatible", "sff,sfp" },
            Package () { "i2c-bus", \_SB.PCI0.RP01.I2C.MUX.CH0 },

Hmm, ACPI has I2cSerialBusV2() resource for this purpose. Why you are not
using that?

I am not an ACPI expert, but my understanding is I2cSerialBusV2() is
used for slave connections. I am trying to reference an I2C controller
here.