Hi ALL,
Please help or reference with the following:
Howto use ACPI for touchscreen:
1) is it possible to detect via ACPI GPIO pin to INT/WAKE Touch?
2) If yes how to find out equivalent of this gpio pin in
/sys/class/gpio? (to have userspace interface to it via export
gpioPINNUMBER> /sys/class/gpio/export
3) From the bellow DSDT table touch is dependant from I2C5 while
i2c-dev creates devices i2c-0...i2c-4. Does this mean that in ACPI
base is 1 and I2C5 is identical to i2c-4 dev ?
As input additional info - I have decoded under 4.4.2 vanilla kernel
x86_64 the following DSDT:
touch related area: (chipone icn 8528).
Device (TCS5)
{
Name (_ADR, Zero) // _ADR: Address
Name (_HID, "CHPN0001") // _HID: Hardware ID
Name (_CID, "PNP0C50" /* HID Protocol Device (I2C bus)
*/) // _CID: Compatible ID
Name (_S0W, Zero) // _S0W: S0 Device Wake State
Name (_DEP, Package (0x02) // _DEP: Dependencies
{
GPO1,
I2C5
})
Method (_PS3, 0, Serialized) // _PS3: Power State 3
{
}
Method (_PS0, 0, Serialized) // _PS0: Power State 0
{
If ((^^^GPO1.AVBL == One))
{
^^^GPO1.TCD3 = Zero
}
Sleep (0x05)
If ((^^^I2C5.PMI1.AVBG == One))
{
^^^I2C5.PMI1.TCON = One
}
Sleep (0x1E)
If ((^^^GPO1.AVBL == One))
{
^^^GPO1.TCD3 = One
}
Sleep (0x78)
}
Method (_CRS, 0, NotSerialized) // _CRS: Current
Resource Settings
{
Name (RBUF, ResourceTemplate ()
{
I2cSerialBus (0x0030, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.I2C4",
0x00, ResourceConsumer, ,
)
Interrupt (ResourceConsumer, Level,
ActiveHigh, Exclusive, ,, )
{
0x00000044,
}
GpioIo (Exclusive, PullDefault, 0x0000,
0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO1", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x001A
}
})
Return (RBUF) /* \_SB_.I2C4.TCS5._CRS.RBUF */
}
Method (_DSM, 4, Serialized) // _DSM: Device-Specific Method
{
Name (_T_1, Zero) // _T_x: Emitted by ASL Compiler
Name (_T_0, Zero) // _T_x: Emitted by ASL Compiler
Debug = "Method _DSM begin"
If ((Arg0 == ToUUID
("3cdff6f7-4267-4555-ad05-b30a3d8938de") /* HID I2C Device */))
{
While (One)
{
_T_0 = ToInteger (Arg2)
If ((_T_0 == Zero))
{
While (One)
{
_T_1 = ToInteger (Arg1)
If ((_T_1 == One))
{
Debug = "Method _DSM Function Query"
Return (Buffer (One)
{
0x03
/* . */
})
}
Else
{
Return (Buffer (One)
{
0x00
/* . */
})
}
Break
}
}
Else
{
If ((_T_0 == One))
{
Debug = "Method _DSM Function HID"
Return (Zero)
}
Else
{
Return (Zero)
}
}
Break
}
}
Else
{
Return (Buffer (One)
{
0x00
/* . */
})
}
}
Method (_STA, 0, NotSerialized) // _STA: Status
{
If ((OSSL & 0x80))
{
Return (Zero)
}
If ((OSYS == 0x07DD))
{
Return (0x0F)
}
Else
{
Return (0x0F)
}
}
}
}
Device (GPO1)
{
Name (_ADR, Zero) // _ADR: Address
Name (_HID, "INT33FC" /* Intel Baytrail GPIO Controller
*/) // _HID: Hardware ID
Name (_CID, "INT33FC" /* Intel Baytrail GPIO Controller
*/) // _CID: Compatible ID
Name (_DDN, "ValleyView GPNCORE controller") // _DDN: DOS
Device Name
Name (_UID, 0x02) // _UID: Unique ID
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
{
Name (RBUF, ResourceTemplate ()
{
Memory32Fixed (ReadWrite,
0xFED0D000, // Address Base
0x00001000, // Address Length
)
Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,, )
{
0x00000030,
}
})
Return (RBUF) /* \_SB_.GPO1._CRS.RBUF */
}
Name (AVBL, Zero)
Method (_REG, 2, NotSerialized) // _REG: Region Availability
{
If ((Arg0 == 0x08))
{
AVBL = Arg1
}
}
OperationRegion (GPOP, GeneralPurposeIo, Zero, 0x0C)
Field (GPOP, ByteAcc, NoLock, Preserve)
{
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000,
IoRestrictionOutputOnly,
"\\_SB.GPO1", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x000F
}
),
BST5, 1,
Connection (
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000,
IoRestrictionOutputOnly,
"\\_SB.GPO1", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x001A
}
),
TCD3, 1
}
Method (_STA, 0, NotSerialized) // _STA: Status
{
Return (0x0F)
}
}
Kind regards,
Serge Kolotylo.
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