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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
Scope (\_SB.PCI0.I2C4)
{
Device (TPAD)
{
Name(_ADR, One)
Name (_HID, "ALPS0001")
Name (_CID, "PNP0C50")
Name (_DDN, "ALPS Touchpad")
Name (_UID, 1)
Name (ISTP, 1) /* Touchpad */
Name (_CRS, ResourceTemplate()
{
I2cSerialBus (
0x2C, // SlaveAddress
ControllerInitiated, // SlaveMode
400000, // ConnectionSpeed
AddressingMode7Bit, // AddressingMode
"\\_SB.PCI0.I2C4", // ResourceSource
)
Interrupt (ResourceConsumer, Level, ActiveLow)
{
GPIO_18_IRQ
}
GpioInt (Level, ActiveLow, ExclusiveAndWake, PullUp, 0x0000, "\\_SB.GPO1", 0x00, ResourceConsumer, ,)
{
18
}
})
Method (_STA)
{
Return (0xF)
}
Method(_DSM, 0x4, NotSerialized)
{
// DSM UUID for HIDI2C - HID driver does not load without DSM
If(LEqual(Arg0, ToUUID("3CDFF6F7-4267-4555-AD05-B30A3D8938DE")))
{
// Function 0 : Query Function
If(LEqual(Arg2, Zero))
{
// Revision 1
If(LEqual(Arg1, One))
{
Return (Buffer (One) {0x03})
}
Else
{
Return (Buffer (One) {0x00})
}
} ElseIf (LEqual(Arg2, One)) { // Function 1 : HID Function
// HID Descriptor Address (IHV Specific)
Return(0x0020)
} Else {
Return (Buffer (One) {0x00})
}
} Else {
Return (Buffer (One) {0x00})
}
}
}
}
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