UP Board: issue adding touchscreen device support via ACPI overlay

wangyafei
New Member Posts: 3
Hi,
I want to add a touchscreen driver to ublinux. I want to add my touchscreen device under the i2c1 bus and do the following things:
1. Extract ACPI tables cat /sys/firmware/acpi/tables/DSDT > dsdt.dat
2. Decompile: iasl -d dsdt.dat
3. Add the following ASL code to dsdt.dsl
And now I have some questions about this,
1. Can I add my touchscreen device by the above steps?
2. If can, There have two gpio pins used by touchscreen device, one is irq-pin and another is reset-pin, they may described like following with ASL code:
I want to add a touchscreen driver to ublinux. I want to add my touchscreen device under the i2c1 bus and do the following things:
1. Extract ACPI tables cat /sys/firmware/acpi/tables/DSDT > dsdt.dat
2. Decompile: iasl -d dsdt.dat
3. Add the following ASL code to dsdt.dsl
Device (I2C2) { Name (_HID, "808622C1") // _HID: Hardware ID Name (_CID, "808622C1") // _CID: Compatible ID ... ... Device (TCS0) /* add my touchscreen device here*/ { Name (_ADR, Zero) // _ADR: Address Name (_HID, "GDIX1001") // _HID: Hardware ID Name (_CID, "GDIX1001") // _CID: Compatible ID Name (_S0W, Zero) // _S0W: S0 Device Wake State Method (_PS3, 0, Serialized) // _PS3: Power State 3 { } Method (_PS0, 0, Serialized) // _PS0: Power State 0 { } Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings { Name (WBUF, ResourceTemplate () { I2cSerialBus (0x0014, ControllerInitiated, 0x00061A80, AddressingMode7Bit, "\\_SB.I2C2", 0x00, ResourceConsumer, , ) GpioInt (Edge, ActiveLow, Shared, PullDefault, 0x0000, "\\_SB.GPO2", 0x00, ResourceConsumer, , ) { // Pin list 0x0000 } GpioIo (Shared, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly, "\\_SB.GPO2", 0x00, ResourceConsumer, , ) { // Pin list 0x0001 } }) Return (WBUF) /* \_SB_.PCI0.I2C2.TCS0._CRS.WBUF */ } Method (_STA, 0, NotSerialized) // _STA: Status { Return (0x0F) } Method (INTI, 0, Serialized) { } Method (INTO, 1, Serialized) { } Method (INTS, 0, Serialized) { } } }4. Recompile: iasl -tc dsdt.dsl
And now I have some questions about this,
1. Can I add my touchscreen device by the above steps?
2. If can, There have two gpio pins used by touchscreen device, one is irq-pin and another is reset-pin, they may described like following with ASL code:
GpioInt (Edge, ActiveLow, Shared, PullDefault, 0x0000, "\\_SB.GPO2", 0x00, ResourceConsumer, , ) { 0x0000 } GpioIo (Shared, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly, "\\_SB.GPO2", 0x00, ResourceConsumer, , ) { 0x0001 }I want to use GPIO4 as irq-pin and GPIO5 as reset-pin in the "up-board 40-pin", can anyone tell me how to modify the above ASL code?
Comments
-
Hi wangyafei,
I suppose you are running ubilinux 3.0 with our 4.4 Linux Kernel on a UP Board, right? -
Hi dcleri,
Yes right, I running ublinux 3.0 with 4.4 Linux Kernel on UP Board. -
The connection between Touch controller and UP Board will show in the following image
-
Hi @wangyafei. Did you managed to get the acpi overlay to work?.
Categories
- All Categories
- 105 Announcements & News
- 55 Product News - New Product/Product Change Notice/ End-of-life
- 186 Welcome Developers!
- 55 Unboxing & Project Sharing
- 50 Tech Updates
- 693 UP Products
- 11 UP 7000
- 1 UP Squared i12
- 10 UP Xtreme i12
- 11 UP Squared Pro 7000
- 1 UP Element i12 Edge
- 19 UP Squared V2
- 59 UP 4000
- 24 UP Xtreme i11
- 35 UP Squared 6000
- 60 UP Squared Pro
- 143 UP Xtreme
- 837 UP Squared
- 1.4K UP Board
- 89 UP Core Plus
- 222 UP Core
- 3 UP Xtreme Lite
- 44 UP AI Edge
- 216 Starter Kits & Peripheral