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mb/system76/lemp9: enable I2C HID touchpad 

Enable the I2C HID driver, configure I2C bus 0 and add the touchpad
device to the devicetree.

Tested on lemp9, touchpad confirmed to use i2c-hid driver in Linux
instead of PS/2.

Signed-off-by: Jeremy Soller <jeremy@system76.com>
Change-Id: Ic3a90fda134b1d53f28ab687b3033ec52fee843b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43623
Reviewed-by: Michael Niewöhner
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Jeremy Soller 2020-07-20 15:18:29 -06:00 committed by Michael Niewöhner
parent e83d30bb5a
commit 2d28c4cff4
3 changed files with 24 additions and 4 deletions
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1
src/mainboard/system76/lemp9/Kconfig
View File

@ -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

23
src/mainboard/system76/lemp9/devicetree.cb
View File

@ -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

4
src/mainboard/system76/lemp9/gpio.h
View File

@ -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),