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-rw-r--r--src/mainboard/system76/lemp9/Kconfig1
-rw-r--r--src/mainboard/system76/lemp9/devicetree.cb23
-rw-r--r--src/mainboard/system76/lemp9/gpio.h4
3 files changed, 24 insertions, 4 deletions
diff --git a/src/mainboard/system76/lemp9/Kconfig b/src/mainboard/system76/lemp9/Kconfig
index 6f2bee76b1..6b5b75012c 100644
--- a/src/mainboard/system76/lemp9/Kconfig
+++ b/src/mainboard/system76/lemp9/Kconfig
@@ -3,6 +3,7 @@ if BOARD_SYSTEM76_LEMP9
config BOARD_SPECIFIC_OPTIONS
def_bool y
select BOARD_ROMSIZE_KB_16384
+ select DRIVERS_I2C_HID
select EC_SYSTEM76_EC
select HAVE_ACPI_RESUME
select HAVE_ACPI_TABLES
diff --git a/src/mainboard/system76/lemp9/devicetree.cb b/src/mainboard/system76/lemp9/devicetree.cb
index e0da72a96e..6adc1885a4 100644
--- a/src/mainboard/system76/lemp9/devicetree.cb
+++ b/src/mainboard/system76/lemp9/devicetree.cb
@@ -1,7 +1,12 @@
chip soc/intel/cannonlake
- # Lock Down
register "common_soc_config" = "{
.chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT,
+ /* Touchpad */
+ .i2c[0] = {
+ .speed = I2C_SPEED_FAST,
+ .rise_time_ns = 80,
+ .fall_time_ns = 110,
+ },
}"
# Send an extra VR mailbox command for the PS4 exit issue
@@ -35,6 +40,11 @@ chip soc/intel/cannonlake
#register "enable_c6dram" = "1"
# FSP Silicon (soc/intel/cannonlake/fsp_params.c)
+ # Serial I/O
+ register "SerialIoDevMode" = "{
+ [PchSerialIoIndexI2C0] = PchSerialIoPci, // Touchpad
+ }"
+
# SATA
register "SataMode" = "Sata_AHCI"
register "SataSalpSupport" = "0"
@@ -185,7 +195,16 @@ chip soc/intel/cannonlake
device pci 14.3 on end
end
device pci 14.5 off end # SDCard
- device pci 15.0 off end # I2C #0
+ device pci 15.0 on
+ chip drivers/i2c/hid
+ register "generic.hid" = ""ELAN040D""
+ register "generic.desc" = ""ELAN Touchpad""
+ register "generic.irq" = "ACPI_IRQ_EDGE_LOW(GPP_B3_IRQ)"
+ register "generic.probed" = "1"
+ register "hid_desc_reg_offset" = "0x01"
+ device i2c 15 on end
+ end
+ end # I2C #0
device pci 15.1 off end # I2C #1
device pci 15.2 off end # I2C #2
device pci 15.3 off end # I2C #3
diff --git a/src/mainboard/system76/lemp9/gpio.h b/src/mainboard/system76/lemp9/gpio.h
index 9c99f13b64..3373c6c0b1 100644
--- a/src/mainboard/system76/lemp9/gpio.h
+++ b/src/mainboard/system76/lemp9/gpio.h
@@ -138,8 +138,8 @@ static const struct pad_config gpio_table[] = {
PAD_NC(GPP_B2, UP_20K),
// CPU Misc
- // GPP_B3
- _PAD_CFG_STRUCT(GPP_B3, 0x80100100, 0x0000),
+ // GPP_B3 (touchpad interrupt)
+ PAD_CFG_GPI_APIC_EDGE_LOW(GPP_B3, NONE, PLTRST),
// NC
PAD_NC(GPP_B4, UP_20K),