src/mainboard/google/cyan/acpi/touchscreen_synaptics.asl

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 Scope (\_SB.PCI0.I2C1)
   4 {
   5         Device (STSA)
   6         {
   7                 Name (_HID, "SYTS7508")
   8                 Name (_CID, "PNP0C50")
   9                 Name (_UID, 4)
  10                 Name (ISTP, 0) /* TouchScreen */
  11
  12                 /* Fetch HidDescriptorAddress, Register offset in the
  13                  * I2C device at which the HID descriptor can be read
  14                  */
  15                 Method (_DSM, 4, NotSerialized)
  16                 {
  17                         If (Arg0 == ToUUID ("3cdff6f7-4267-4555-ad05-b30a3d8938de"))
  18                         {
  19                                 // DSM Revision
  20                                 If (Arg2 == 0)
  21                                 {
  22                                         If (Arg1 == 1)
  23                                         {
  24                                                 Return (Buffer (1)
  25                                                 {
  26                                                         0x03
  27                                                 })
  28                                         }
  29                                         Else
  30                                         {
  31                                                 Return (Buffer (1)
  32                                                 {
  33                                                         0x00
  34                                                 })
  35                                         }
  36                                 }
  37                                 // HID Function
  38                                 If (Arg2 == 1)
  39                                 {
  40                                         Return (0x20)
  41                                 }
  42                         }
  43                         Else
  44                         {
  45                                 Return (Buffer (1)
  46                                 {
  47                                         0x00
  48                                 })
  49                         }
  50
  51                         Return (0)
  52                 }
  53
  54                 Method(_CRS, 0x0, NotSerialized)
  55                 {
  56                         Name (BUF0, ResourceTemplate ()
  57                         {
  58                                 I2cSerialBus(
  59                                         0x20,                     /* SlaveAddress */
  60                                         ControllerInitiated,      /* SlaveMode */
  61                                         400000,                   /* ConnectionSpeed */
  62                                         AddressingMode7Bit,       /* AddressingMode */
  63                                         "\\_SB.PCI0.I2C1",             /* ResourceSource */
  64                                 )
  65                                 GpioInt (Level, ActiveLow, SharedAndWake, PullDefault,,
  66                                         "\\_SB.GPNC") { BOARD_TOUCH_GPIO_INDEX }
  67                         })
  68                         Return (BUF0)
  69                 }
  70
  71                 Method (_STA)
  72                 {
  73                         If (\S1EN == 1) {
  74                                 Return (0xF)
  75                         } Else {
  76                                 Return (0x0)
  77                         }
  78                 }
  79 #if CONFIG(CHROMEOS)
  80                 Name (_PRW, Package() { BOARD_TOUCHSCREEN_WAKE_GPIO, 0x3 })
  81 #endif
  82                 /* Allow device to power off in S0 */
  83                 Name (_S0W, 4)
  84         }
  85 }