Re: No PNP0CA0 device on a Dell Precision 5520 laptop

[Oliver Neukum <oneukum@suse.de>]

Am Dienstag, den 11.02.2020, 16:44 +0200 schrieb Heikki Krogerus:
> On Tue, Feb 11, 2020 at 03:34:37PM +0100, Oliver Neukum wrote:

> > > 
> > 
> > yes I got that one. Thanks for the tip.
> 
> OK, cool! Let me know if the tps6598x.c driver works with that.
> 
> thanks,

Sorry for my earlier rather short report. It turns out that even
i2c_multi_instantiate does not load. A bit of debugging points
to rather inexplicable ACPI code:

        Device (UCM1)
        {
            Name (_HID, "INT3515")  // _HID: Hardware ID
            Name (_UID, Zero)  // _UID: Unique ID
            Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
            {
                Name (SBFB, ResourceTemplate ()
                {
                    I2cSerialBusV2 (0x0038, ControllerInitiated, 0x00061A80,
                        AddressingMode7Bit, "\\_SB.PCI0.I2C0",
                        0x00, ResourceConsumer, , Exclusive,
                        )
                })
                Name (SBFI, ResourceTemplate ()
                {
                    Interrupt (ResourceConsumer, Level, ActiveLow, Exclusive, ,, _Y28)
                    {
                        0x00000000,
                    }
                })
                CreateDWordField (SBFI, \_SB.PCI0.I2C0.UCM1._CRS._Y28._INT, GINT)  // _INT: Interrupts
                GINT = INUM (UCG1)
                Return (ConcatenateResTemplate (SBFB, SBFI))
            }

            Method (_STA, 0, NotSerialized)  // _STA: Status
            {
                If ((UCSI == One))
                {
                    Return (0x0F)
                }
                Else
                {
                    Return (Zero)
                }
            }
        }

And indeed 'status' is 0 in sysfs. I am puzzled. I can see no sense in that unless
I am supposed to use ucsi_acpi but there is no node for that.

	Regards
		Oliver