[MinnowBoard] Linux x86 I2C device probing with ACPI

[Christophe Ricard]

Hi,

I am trying to probe slave i2c devices with ACPI running Ubuntu 15.04 and
kernel 4.3
without success so far.

I've followed guidance here:
http://elinux.org/Minnowboard:MinnowMaxLinuxKernel

but i found no i2c device are probed at boot.

For example, one default device available in the acpi table is never
detected: RTEK node (with ID 10EC5640).

When adding my own device to I2C7, my device is never detected as well :(.

For example the complete modified I2C7 is at the end of the message.

I am compiling the kernel with options:
CONFIG_ACPI_CUSTOM_DSDT_FILE="dsdt.hex"
CONFIG_ACPI_CUSTOM_DSDT=y
CONFIG_ACPI_INITRD_TABLE_OVERRIDE=y

I am running on Minnowboard firmware 0.83 with default options.

Best Regards
Christophe

        Device (I2C7)
        {
            Name (_ADR, Zero)  // _ADR: Address
            Name (_HID, "80860F41" /* Intel Baytrail I2C Host Controller
*/)  // _HID: Hardware ID
            Name (_CID, "80860F41" /* Intel Baytrail I2C Host Controller
*/)  // _CID: Compatible ID
            Name (_DDN, "Intel(R) I2C Controller #7 - 80860F47")  // _DDN:
DOS Device Name
            Name (_UID, 0x07)  // _UID: Unique ID
            Name (_DEP, Package (One)  // _DEP: Dependencies
            {
                PEPD
            })
            Name (RBUF, ResourceTemplate ()
            {
                Memory32Fixed (ReadWrite,
                    0x00000000,         // Address Base
                    0x00001000,         // Address Length
                    _Y1F)
                Interrupt (ResourceConsumer, Level, ActiveLow, Exclusive,
,, )
                {
                    0x00000026,
                }
                FixedDMA (0x001C, 0x0004, Width32bit, )
                FixedDMA (0x001D, 0x0005, Width32bit, )
            })
            Method (SSCN, 0, NotSerialized)
            {
                Name (PKG, Package (0x03)
                {
                    0x0200,
                    0x0200,
                    0x06
                })
                Return (PKG) /* \_SB_.I2C7.SSCN.PKG_ */
            }

            Method (FMCN, 0, NotSerialized)
            {
                Name (PKG, Package (0x03)
                {
                    0x55,
                    0x99,
                    0x06
                })
                Return (PKG) /* \_SB_.I2C7.FMCN.PKG_ */
            }

            Method (FPCN, 0, NotSerialized)
            {
                Name (PKG, Package (0x03)
                {
                    0x1B,
                    0x3A,
                    0x06
                })
                Return (PKG) /* \_SB_.I2C7.FPCN.PKG_ */
            }

            Method (_HRV, 0, NotSerialized)  // _HRV: Hardware Revision
            {
                Return (SOCS) /* \SOCS */
            }

            Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource
Settings
            {
                CreateDWordField (RBUF, \_SB.I2C7._Y1F._BAS, B0BA)  //
_BAS: Base Address
                CreateDWordField (RBUF, \_SB.I2C7._Y1F._LEN, B0LN)  //
_LEN: Length
                B0BA = I70A /* \I70A */
                B0LN = I70L /* \I70L */
                Return (RBUF) /* \_SB_.I2C7.RBUF */
            }

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

                If (((I70A == Zero) || (L27D == One)))
                {
                    Return (Zero)
                }

                Return (0x0F)
            }

            Method (_PS3, 0, NotSerialized)  // _PS3: Power State 3
            {
                PSAT |= 0x03
                PSAT |= Zero
            }

            Method (_PS0, 0, NotSerialized)  // _PS0: Power State 0
            {
                PSAT &= 0xFFFFFFFC
                PSAT |= Zero
            }

            OperationRegion (KEYS, SystemMemory, I71A, 0x0100)
            Field (KEYS, DWordAcc, NoLock, WriteAsZeros)
            {
                Offset (0x84),
                PSAT,   32
            }

            Device (NFC1)
            {
                Name (_ADR, Zero)  // _ADR: Address
                Name (_HID, "NXP5441")  // _HID: Hardware ID
                Name (_CID, "NXP5441")  // _CID: Compatible ID
                Name (_DDN, "NXP NFC")  // _DDN: DOS Device Name
                Name (_UID, One)  // _UID: Unique ID
                Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource
Settings
                {
                    Name (SBUF, ResourceTemplate ()
                    {
                        I2cSerialBus (0x0028, ControllerInitiated,
0x00061A80,
                            AddressingMode7Bit, "\\_SB.I2C7",
                            0x00, ResourceConsumer, ,
                            )
                        Interrupt (ResourceConsumer, Level, ActiveLow,
Exclusive, ,, )
                        {
                            0x00000047,
                        }
                        GpioIo (Exclusive, PullDefault, 0x0000, 0x0000,
IoRestrictionOutputOnly,
                            "\\_SB.GPO2", 0x00, ResourceConsumer, ,
                            )
                            {   // Pin list
                                0x0009
                            }
                        GpioIo (Exclusive, PullDefault, 0x0000, 0x0000,
IoRestrictionOutputOnly,
                            "\\_SB.GPO2", 0x00, ResourceConsumer, ,
                            )
                            {   // Pin list
                                0x0008
                            }
                    })
                    Return (SBUF) /* \_SB_.I2C7.NFC1._CRS.SBUF */
                }

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

                    Return (Zero)
                }
            }
        }

        Scope (I2C7)
        {
        }
    }
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