mb/google/octopus: Use the newly added override devicetree feature

Now that sconfig is able to support variant-specific override trees,
this change updates octopus boards to use this feature. Following
devices are moved from baseboard devicetree to variant specific
devicetree:
1. Touchscreen
2. Trackpad
3. Digitizer
4. Audio codec

BUG=b:80081934
TEST=Verified that the right devices show up in static.c for each
variant.

Change-Id: I8df0cdf4dbcd7613aa4ef4042c272eca2915da9e
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/27219
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/octopus/Kconfig b/src/mainboard/google/octopus/Kconfig
index 226e44f..45900c8 100644
--- a/src/mainboard/google/octopus/Kconfig
+++ b/src/mainboard/google/octopus/Kconfig
@@ -47,9 +47,12 @@
 
 config DEVICETREE
 	string
-	default "variants/bip/devicetree.cb" if BOARD_GOOGLE_BIP
 	default "variants/baseboard/devicetree.cb"
 
+config OVERRIDE_DEVICETREE
+	string
+	default "variants/$(CONFIG_VARIANT_DIR)/overridetree.cb" if !BOARD_GOOGLE_OCTOPUS
+
 config MAINBOARD_PART_NUMBER
 	string
 	default "Yorp" if BOARD_GOOGLE_YORP
diff --git a/src/mainboard/google/octopus/variants/baseboard/devicetree.cb b/src/mainboard/google/octopus/variants/baseboard/devicetree.cb
index 668becc..6f71f16 100644
--- a/src/mainboard/google/octopus/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/octopus/variants/baseboard/devicetree.cb
@@ -142,86 +142,14 @@
 		device pci 14.1 off end	# - PCIe-B 1
 		device pci 15.0 on  end	# - XHCI
 		device pci 15.1 on  end	# - XDCI
-		device pci 16.0 on
-			chip drivers/i2c/hid
-				register "generic.hid" = ""WCOM50C1""
-				register "generic.desc" = ""WCOM Digitizer""
-				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_139_IRQ)"
-				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_140)"
-				register "generic.has_power_resource" = "1"
-				register "hid_desc_reg_offset" = "0x1"
-				device i2c 0x9 on end
-			end
-		end	# - I2C 0
-		device pci 16.1 on end	# - I2C 1
-		device pci 16.2 on end	# - I2C 2
-		device pci 16.3 on end	# - I2C 3
-		device pci 17.0 on end	# - I2C 4
-		device pci 17.1 on
-			chip drivers/i2c/da7219
-				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_137_IRQ)"
-				register "btn_cfg" = "50"
-				register "mic_det_thr" = "500"
-				register "jack_ins_deb" = "20"
-				register "jack_det_rate" = ""32ms_64ms""
-				register "jack_rem_deb" = "1"
-				register "a_d_btn_thr" = "0xa"
-				register "d_b_btn_thr" = "0x16"
-				register "b_c_btn_thr" = "0x21"
-				register "c_mic_btn_thr" = "0x3e"
-				register "btn_avg" = "4"
-				register "adc_1bit_rpt" = "1"
-				register "micbias_lvl" = "2600"
-				register "mic_amp_in_sel" = ""diff""
-				device i2c 1a on end
-			end
-		end	# - I2C 5
-		device pci 17.2 on
-			chip drivers/i2c/generic
-				register "hid" = ""ELAN0000""
-				register "desc" = ""ELAN Touchpad""
-				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_135_IRQ)"
-				register "wake" = "GPE0_DW2_02"
-				register "probed" = "1"
-				device i2c 15 on end
-			end
-			chip drivers/i2c/hid
-				register "generic.hid" = ""PNP0C50""
-				register "generic.desc" = ""Synaptics Touchpad""
-				register "generic.irq" = "ACPI_IRQ_EDGE_LOW(GPIO_135_IRQ)"
-				register "generic.wake" = "GPE0_DW2_02"
-				register "generic.probed" = "1"
-				register "hid_desc_reg_offset" = "0x20"
-				device i2c 0x2c on end
-			end
-		end	# - I2C 6
-		device pci 17.3 on
-			chip drivers/i2c/generic
-				register "hid" = ""ELAN0001""
-				register "desc" = ""ELAN Touchscreen""
-				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_212_IRQ)"
-				register "probed" = "1"
-				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_105)"
-				register "reset_delay_ms" = "20"
-				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_213)"
-				register "enable_delay_ms" = "1"
-				register "has_power_resource" = "1"
-				device i2c 10 on end
-			end
-			chip drivers/i2c/hid
-				register "generic.hid" = ""SYTS7817""
-				register "generic.desc" = ""Synaptics Touchscreen""
-				register "generic.irq" = "ACPI_IRQ_EDGE_LOW(GPIO_212_IRQ)"
-				register "generic.probed" = "1"
-				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_105)"
-				register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_213)"
-				register "generic.reset_delay_ms" = "45"
-				register "generic.has_power_resource" = "1"
-				register "generic.disable_gpio_export_in_crs" = "1"
-				register "hid_desc_reg_offset" = "0x20"
-				device i2c 20 on end
-			end
-		end	# - I2C 7
+		device pci 16.0 on  end	# - I2C 0
+		device pci 16.1 on  end	# - I2C 1
+		device pci 16.2 on  end	# - I2C 2
+		device pci 16.3 on  end	# - I2C 3
+		device pci 17.0 on  end	# - I2C 4
+		device pci 17.1 on  end	# - I2C 5
+		device pci 17.2 on  end	# - I2C 6
+		device pci 17.3 off end	# - I2C 7
 		device pci 18.0 on  end	# - UART 0
 		device pci 18.1 off end	# - UART 1
 		device pci 18.2 on  end	# - UART 2
diff --git a/src/mainboard/google/octopus/variants/bip/devicetree.cb b/src/mainboard/google/octopus/variants/bip/devicetree.cb
deleted file mode 100644
index 8f2992b..0000000
--- a/src/mainboard/google/octopus/variants/bip/devicetree.cb
+++ /dev/null
@@ -1,222 +0,0 @@
-chip soc/intel/apollolake
-	device cpu_cluster 0 on
-		device lapic 0 on end
-	end
-
-	register "pcie_rp_clkreq_pin[2]" = "3"    # wifi/bt
-	# Disable unused clkreq of PCIe root ports
-	register "pcie_rp_clkreq_pin[0]" = "CLKREQ_DISABLED"
-	register "pcie_rp_clkreq_pin[1]" = "CLKREQ_DISABLED"
-	register "pcie_rp_clkreq_pin[3]" = "CLKREQ_DISABLED"
-	register "pcie_rp_clkreq_pin[4]" = "CLKREQ_DISABLED"
-	register "pcie_rp_clkreq_pin[5]" = "CLKREQ_DISABLED"
-
-	# Set de-emphasis to disabled for PCIE WiFI (Thunderpeak)
-	# as it is required for detection
-	register "pcie_rp_deemphasis_enable[2]" = "0"
-	# Set de-emphasis to default (enabled) for remaining ports
-	register "pcie_rp_deemphasis_enable[0]" = "1"
-	register "pcie_rp_deemphasis_enable[1]" = "1"
-	register "pcie_rp_deemphasis_enable[3]" = "1"
-	register "pcie_rp_deemphasis_enable[4]" = "1"
-	register "pcie_rp_deemphasis_enable[5]" = "1"
-
-	# GPIO for PERST_0 (WLAN_PE_RST)
-	register "prt0_gpio" = "GPIO_164"
-
-	# GPE configuration
-	# Note that GPE events called out in ASL code rely on this
-	# route, i.e., if this route changes then the affected GPE
-	# offset bits also need to be changed. This sets the PMC register
-	# GPE_CFG fields.
-	# DW1 is used by:
-	#   - GPIO_63 - H1_PCH_INT_ODL
-	# DW2 is used by:
-	#   - GPIO_141 - EC_PCH_WAKE_ODL
-	#   - GPIO_142 - TRACKPAD_INT2_1V8_ODL
-	# DW3 is used by:
-	#   - GPIO_117 - LTE_WAKE_ODL
-	#   - GPIO_119 - WLAN_PCIE_WAKE_ODL
-	register "gpe0_dw1" = "PMC_GPE_NW_63_32"
-	register "gpe0_dw2" = "PMC_GPE_N_95_64"
-	register "gpe0_dw3" = "PMC_GPE_N_63_32"
-
-	# PL1 override 8000 mW: Due to error in the energy calculation for
-	# current VR solution. Experiments show that SoC TDP max (6W) can
-	# be reached when RAPL PL1 is set to 8W.
-	register "tdp_pl1_override_mw" = "8000"
-	# Set RAPL PL2 to 15W.
-	register "tdp_pl2_override_mw" = "15000"
-
-	# Minimum SLP S3 assertion width 28ms.
-	register "slp_s3_assertion_width_usecs" = "28000"
-
-	# Enable lpss s0ix
-	register "lpss_s0ix_enable" = "1"
-
-	# Enable DPTF
-	register "dptf_enable" = "1"
-
-	# Enable Audio Clock and Power gating
-	register "hdaudio_clk_gate_enable" = "1"
-	register "hdaudio_pwr_gate_enable" = "1"
-	register "hdaudio_bios_config_lockdown" = "1"
-
-	# Intel Common SoC Config
-	#+-------------------+---------------------------+
-	#| Field             |  Value                    |
-	#+-------------------+---------------------------+
-	#| GSPI0             | cr50 TPM. Early init is   |
-	#|                   | required to set up a BAR  |
-	#|                   | for TPM communication     |
-	#|                   | before memory is up       |
-	#| I2C0              | Digitizer                 |
-	#| I2C5              | Audio                     |
-	#| I2C6              | Trackpad                  |
-	#| I2C7              | Touchscreen               |
-	#+-------------------+---------------------------+
-	register "common_soc_config" = "{
-		.gspi[0] = {
-			.speed_mhz = 1,
-			.early_init = 1,
-		},
-		.i2c[0] = {
-			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 152,
-			.fall_time_ns = 30,
-		},
-		.i2c[5] = {
-			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 104,
-			.fall_time_ns = 52,
-		},
-		.i2c[6] = {
-			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 114,
-			.fall_time_ns = 164,
-			.data_hold_time_ns = 350,
-		},
-		.i2c[7] = {
-			.speed = I2C_SPEED_FAST,
-			.rise_time_ns = 76,
-			.fall_time_ns = 164,
-		},
-	}"
-
-	register "pnp_settings" = "PNP_PERF_POWER"
-
-	device domain 0 on
-		device pci 00.0 on  end	# - Host Bridge
-		device pci 00.1 on  end	# - DPTF
-		device pci 00.2 off end	# - NPK
-		device pci 02.0 on  end	# - Gen
-		device pci 03.0 on  end	# - Iunit
-		device pci 0c.0 on  end	# - CNVi
-		device pci 0d.0 on  end	# - P2SB
-		device pci 0d.1 on  end	# - PMC
-		device pci 0d.2 on  end	# - Fast SPI
-		device pci 0d.3 on  end	# - Shared SRAM
-		device pci 0e.0 on
-			chip drivers/generic/max98357a
-				register "sdmode_gpio" =  "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_91)"
-				register "sdmode_delay" = "5"
-				device generic 0 on end
-			end
-		end	# - Audio
-		device pci 0f.0 on  end	# - Heci1
-		device pci 0f.1 on  end	# - Heci2
-		device pci 0f.2 on  end	# - Heci3
-		device pci 11.0 off end	# - ISH
-		device pci 12.0 off end	# - SATA
-		device pci 13.0 on
-			chip drivers/intel/wifi
-				register "wake" = "GPE0_DW3_11"
-				device pci 00.0 on end
-			end
-		end	# - PCIe-A 0 Onboard M2 Slot(Wifi)
-		device pci 13.1 off end	# - PCIe-A 1
-		device pci 13.2 off end	# - PCIe-A 2
-		device pci 13.3 off end	# - PCIe-A 3
-		device pci 14.0 off end	# - PCIe-B 0
-		device pci 14.1 off end	# - PCIe-B 1
-		device pci 15.0 on  end	# - XHCI
-		device pci 15.1 off end	# - XDCI
-		device pci 16.0 on
-			chip drivers/i2c/hid
-				register "generic.hid" = ""WCOM50C1""
-				register "generic.desc" = ""WCOM Digitizer""
-				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_139_IRQ)"
-				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_140)"
-				register "generic.has_power_resource" = "1"
-				register "hid_desc_reg_offset" = "0x1"
-				device i2c 0x9 on end
-			end
-		end	# - I2C 0
-		device pci 16.1 on end	# - I2C 1
-		device pci 16.2 on end	# - I2C 2
-		device pci 16.3 on end	# - I2C 3
-		device pci 17.0 on end	# - I2C 4
-		device pci 17.1 on
-			chip drivers/i2c/generic
-				register "hid" = ""10EC5682""
-				register "name" = ""RT58""
-				register "desc" = ""Realtek RT5682""
-				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_137_IRQ)"
-				register "probed" = "1"
-				register "property_count" = "1"
-				# Set the jd_src to RT5668_JD1 for jack detection
-				register "property_list[0].type" = "ACPI_DP_TYPE_INTEGER"
-				register "property_list[0].name" = ""realtek,jd-src""
-				register "property_list[0].integer" = "1"
-				device i2c 1a on end
-                        end
-		end	# - I2C 5
-		device pci 17.2 on
-			chip drivers/i2c/generic
-				register "hid" = ""ELAN0000""
-				register "desc" = ""ELAN Touchpad""
-				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_135_IRQ)"
-				register "wake" = "GPE0_DW2_02"
-				register "probed" = "1"
-				device i2c 15 on end
-			end
-		end	# - I2C 6
-		device pci 17.3 on
-			chip drivers/i2c/generic
-				register "hid" = ""ELAN0001""
-				register "desc" = ""ELAN Touchscreen""
-				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_212_IRQ)"
-				register "probed" = "1"
-				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_105)"
-				register "reset_delay_ms" = "20"
-				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_213)"
-				register "enable_delay_ms" = "1"
-				register "has_power_resource" = "1"
-				device i2c 10 on end
-			end
-		end	# - I2C 7
-		device pci 18.0 on  end	# - UART 0
-		device pci 18.1 off end	# - UART 1
-		device pci 18.2 on  end	# - UART 2
-		device pci 18.3 off end	# - UART 3
-		device pci 19.0 on
-			chip drivers/spi/acpi
-				register "hid" = "ACPI_DT_NAMESPACE_HID"
-				register "compat_string" = ""google,cr50""
-				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_63_IRQ)"
-				device spi 0 on end
-			end
-		end # - GSPI 0
-		device pci 19.1 off end	# - SPI 1
-		device pci 19.2 on  end	# - SPI 2
-		device pci 1a.0 on  end	# - PWM
-		device pci 1c.0 on  end	# - eMMC
-		device pci 1e.0 off end	# - SDIO
-		device pci 1f.0 on
-			chip ec/google/chromeec
-				device pnp 0c09.0 on end
-			end
-		end	# - ESPI
-		device pci 1f.1 on  end	# - SMBUS
-	end
-end
diff --git a/src/mainboard/google/octopus/variants/bip/overridetree.cb b/src/mainboard/google/octopus/variants/bip/overridetree.cb
new file mode 100644
index 0000000..e79a159
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/bip/overridetree.cb
@@ -0,0 +1,55 @@
+chip soc/intel/apollolake
+
+	device domain 0 on
+		device pci 16.0 on
+			chip drivers/i2c/hid
+				register "generic.hid" = ""WCOM50C1""
+				register "generic.desc" = ""WCOM Digitizer""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_139_IRQ)"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_140)"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x1"
+				device i2c 0x9 on end
+			end
+		end	# - I2C 0
+		device pci 17.1 on
+			chip drivers/i2c/generic
+				register "hid" = ""10EC5682""
+				register "name" = ""RT58""
+				register "desc" = ""Realtek RT5682""
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_137_IRQ)"
+				register "probed" = "1"
+				register "property_count" = "1"
+				# Set the jd_src to RT5668_JD1 for jack detection
+				register "property_list[0].type" = "ACPI_DP_TYPE_INTEGER"
+				register "property_list[0].name" = ""realtek,jd-src""
+				register "property_list[0].integer" = "1"
+				device i2c 1a on end
+			end
+		end	# - I2C 5
+		device pci 17.2 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0000""
+				register "desc" = ""ELAN Touchpad""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_135_IRQ)"
+				register "wake" = "GPE0_DW2_02"
+				register "probed" = "1"
+				device i2c 15 on end
+			end
+		end	# - I2C 6
+		device pci 17.3 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0001""
+				register "desc" = ""ELAN Touchscreen""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_212_IRQ)"
+				register "probed" = "1"
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_105)"
+				register "reset_delay_ms" = "20"
+				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_213)"
+				register "enable_delay_ms" = "1"
+				register "has_power_resource" = "1"
+				device i2c 10 on end
+			end
+		end	# - I2C 7
+	end
+end
diff --git a/src/mainboard/google/octopus/variants/fleex/overridetree.cb b/src/mainboard/google/octopus/variants/fleex/overridetree.cb
new file mode 100644
index 0000000..466d19b
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/fleex/overridetree.cb
@@ -0,0 +1,48 @@
+chip soc/intel/apollolake
+
+	device domain 0 on
+		device pci 17.1 on
+			chip drivers/i2c/da7219
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_137_IRQ)"
+				register "btn_cfg" = "50"
+				register "mic_det_thr" = "500"
+				register "jack_ins_deb" = "20"
+				register "jack_det_rate" = ""32ms_64ms""
+				register "jack_rem_deb" = "1"
+				register "a_d_btn_thr" = "0xa"
+				register "d_b_btn_thr" = "0x16"
+				register "b_c_btn_thr" = "0x21"
+				register "c_mic_btn_thr" = "0x3e"
+				register "btn_avg" = "4"
+				register "adc_1bit_rpt" = "1"
+				register "micbias_lvl" = "2600"
+				register "mic_amp_in_sel" = ""diff""
+				device i2c 1a on end
+			end
+		end	# - I2C 5
+		device pci 17.2 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0000""
+				register "desc" = ""ELAN Touchpad""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_135_IRQ)"
+				register "wake" = "GPE0_DW2_02"
+				register "probed" = "1"
+				device i2c 15 on end
+			end
+		end	# - I2C 6
+		device pci 17.3 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0001""
+				register "desc" = ""ELAN Touchscreen""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_212_IRQ)"
+				register "probed" = "1"
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_105)"
+				register "reset_delay_ms" = "20"
+				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_213)"
+				register "enable_delay_ms" = "1"
+				register "has_power_resource" = "1"
+				device i2c 10 on end
+			end
+		end	# - I2C 7
+	end
+end
diff --git a/src/mainboard/google/octopus/variants/phaser/overridetree.cb b/src/mainboard/google/octopus/variants/phaser/overridetree.cb
new file mode 100644
index 0000000..f2824d8
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/phaser/overridetree.cb
@@ -0,0 +1,81 @@
+chip soc/intel/apollolake
+
+	device domain 0 on
+		device pci 16.0 on
+			chip drivers/i2c/hid
+				register "generic.hid" = ""WCOM50C1""
+				register "generic.desc" = ""WCOM Digitizer""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_139_IRQ)"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_140)"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x1"
+				device i2c 0x9 on end
+			end
+		end	# - I2C 0
+		device pci 17.1 on
+			chip drivers/i2c/da7219
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_137_IRQ)"
+				register "btn_cfg" = "50"
+				register "mic_det_thr" = "500"
+				register "jack_ins_deb" = "20"
+				register "jack_det_rate" = ""32ms_64ms""
+				register "jack_rem_deb" = "1"
+				register "a_d_btn_thr" = "0xa"
+				register "d_b_btn_thr" = "0x16"
+				register "b_c_btn_thr" = "0x21"
+				register "c_mic_btn_thr" = "0x3e"
+				register "btn_avg" = "4"
+				register "adc_1bit_rpt" = "1"
+				register "micbias_lvl" = "2600"
+				register "mic_amp_in_sel" = ""diff""
+				device i2c 1a on end
+			end
+		end	# - I2C 5
+		device pci 17.2 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0000""
+				register "desc" = ""ELAN Touchpad""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_135_IRQ)"
+				register "wake" = "GPE0_DW2_02"
+				register "probed" = "1"
+				device i2c 15 on end
+			end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""PNP0C50""
+				register "generic.desc" = ""Synaptics Touchpad""
+				register "generic.irq" = "ACPI_IRQ_EDGE_LOW(GPIO_135_IRQ)"
+				register "generic.wake" = "GPE0_DW2_02"
+				register "generic.probed" = "1"
+				register "hid_desc_reg_offset" = "0x20"
+				device i2c 0x2c on end
+			end
+		end	# - I2C 6
+		device pci 17.3 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0001""
+				register "desc" = ""ELAN Touchscreen""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_212_IRQ)"
+				register "probed" = "1"
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_105)"
+				register "reset_delay_ms" = "20"
+				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_213)"
+				register "enable_delay_ms" = "1"
+				register "has_power_resource" = "1"
+				device i2c 10 on end
+			end
+			chip drivers/i2c/hid
+				register "generic.hid" = ""SYTS7817""
+				register "generic.desc" = ""Synaptics Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_EDGE_LOW(GPIO_212_IRQ)"
+				register "generic.probed" = "1"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_105)"
+				register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_213)"
+				register "generic.reset_delay_ms" = "45"
+				register "generic.has_power_resource" = "1"
+				register "generic.disable_gpio_export_in_crs" = "1"
+				register "hid_desc_reg_offset" = "0x20"
+				device i2c 20 on end
+			end
+		end	# - I2C 7
+	end
+end
diff --git a/src/mainboard/google/octopus/variants/yorp/overridetree.cb b/src/mainboard/google/octopus/variants/yorp/overridetree.cb
new file mode 100644
index 0000000..d29e6c1
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/yorp/overridetree.cb
@@ -0,0 +1,59 @@
+chip soc/intel/apollolake
+
+	device domain 0 on
+		device pci 16.0 on
+			chip drivers/i2c/hid
+				register "generic.hid" = ""WCOM50C1""
+				register "generic.desc" = ""WCOM Digitizer""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_139_IRQ)"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_140)"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x1"
+				device i2c 0x9 on end
+			end
+		end	# - I2C 0
+		device pci 17.1 on
+			chip drivers/i2c/da7219
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_137_IRQ)"
+				register "btn_cfg" = "50"
+				register "mic_det_thr" = "500"
+				register "jack_ins_deb" = "20"
+				register "jack_det_rate" = ""32ms_64ms""
+				register "jack_rem_deb" = "1"
+				register "a_d_btn_thr" = "0xa"
+				register "d_b_btn_thr" = "0x16"
+				register "b_c_btn_thr" = "0x21"
+				register "c_mic_btn_thr" = "0x3e"
+				register "btn_avg" = "4"
+				register "adc_1bit_rpt" = "1"
+				register "micbias_lvl" = "2600"
+				register "mic_amp_in_sel" = ""diff""
+				device i2c 1a on end
+			end
+		end	# - I2C 5
+		device pci 17.2 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0000""
+				register "desc" = ""ELAN Touchpad""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_135_IRQ)"
+				register "wake" = "GPE0_DW2_02"
+				register "probed" = "1"
+				device i2c 15 on end
+			end
+		end	# - I2C 6
+		device pci 17.3 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0001""
+				register "desc" = ""ELAN Touchscreen""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPIO_212_IRQ)"
+				register "probed" = "1"
+				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_105)"
+				register "reset_delay_ms" = "20"
+				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_213)"
+				register "enable_delay_ms" = "1"
+				register "has_power_resource" = "1"
+				device i2c 10 on end
+			end
+		end	# - I2C 7
+	end
+end