mb/google/kahlee: use override devicetrees for variants

This helps with deduplicating the identical parts of the variants'
devicetrees.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ie050c4624327b904e8cb0959b40421339e43f825
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68634
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>

10 files changed, 204 insertions, 576 deletions

diff --git a/src/mainboard/google/kahlee/Kconfig b/src/mainboard/google/kahlee/Kconfig
index 10524fe5e9f5..8c8486e65288 100644
--- a/src/mainboard/google/kahlee/Kconfig
+++ b/src/mainboard/google/kahlee/Kconfig
@@ -64,7 +64,10 @@ config MAINBOARD_PART_NUMBER
 	default "Treeya" if BOARD_GOOGLE_TREEYA
 
 config DEVICETREE
-	default "variants/\$(CONFIG_VARIANT_DIR)/devicetree.cb"
+	default "variants/baseboard/devicetree.cb"
+
+config OVERRIDE_DEVICETREE
+	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb"
 
 config MAINBOARD_FAMILY
 	string
diff --git a/src/mainboard/google/kahlee/variants/aleena/devicetree.cb b/src/mainboard/google/kahlee/variants/aleena/devicetree.cb
deleted file mode 100644
index 42c40170f051..000000000000
--- a/src/mainboard/google/kahlee/variants/aleena/devicetree.cb
+++ /dev/null
@@ -1,151 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-
-chip soc/amd/stoneyridge
-	register "spd_addr_lookup" = "
-	{
-		{ {0xA0, 0x00} }, // socket 0 - Channel 0, slot 0
-	}"
-	register "dram_clear_on_reset" = "DRAM_CONTENTS_KEEP"
-	register "uma_mode" = "UMAMODE_SPECIFIED_SIZE"
-	register "uma_size" = "32 * MiB"
-	register "stapm_percent" = "80"
-	register "stapm_time_ms" = "2500000"
-	register "stapm_power_mw" = "7800"
-
-	# Enable I2C0 for audio, USB3 hub at 400kHz
-	register "i2c[0]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 95,
-		.fall_time_ns = 3,
-	}"
-
-	# Enable I2C1 for H1 at 400kHz
-	register "i2c[1]" = "{
-		.early_init = 1,
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 45,
-		.fall_time_ns = 4,
-	}"
-
-	# Enable I2C2 for trackpad, pen at 400kHz
-	register "i2c[2]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 26,
-		.fall_time_ns = 11,
-	}"
-
-	# Enable I2C3 for touchscreen at 400kHz
-	register "i2c[3]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 20,
-		.fall_time_ns = 19,
-	}"
-
-	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
-				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
-
-	device domain 0 on
-		device ref iommu off end # IOMMU (Disabled for performance and battery)
-		device ref gfx on end
-		device ref gfx_hda on end
-		device ref gpp_bridge_1 on end # WLAN
-		device ref gpp_bridge_3 on
-			chip drivers/generic/bayhub
-				register "power_saving" = "1"
-				device pci 00.0 on end
-			end
-		end
-		device ref hda_bridge on end
-		device ref hda on end
-		device ref xhci on end
-		device ref ehci on end
-		device ref lpc_bridge on
-			chip ec/google/chromeec
-				device pnp 0c09.0 on end
-			end
-		end
-		device ref sdhci on end
-	end #domain
-	device ref i2c_0 on
-		chip drivers/generic/adau7002
-			device generic 0.0 on end
-		end
-		chip drivers/i2c/da7219
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_14)"
-			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""
-			register "mclk_name" = ""oscout1""
-			device i2c 1a on end
-		end
-		chip drivers/generic/max98357a
-			register "hid" = ""MX98357A""
-			register "sdmode_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_119)"
-			register "sdmode_delay" = "5"
-			device generic 0.1 on end
-		end
-	end
-	device ref i2c_1 on
-		chip drivers/i2c/tpm
-			register "hid" = ""GOOG0005""
-			register "desc" = ""Cr50 TPM""
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_9)"
-			device i2c 50 on end
-		end
-	end
-	device ref i2c_2 on
-		chip drivers/i2c/generic
-			register "hid" = ""ELAN0000""
-			register "desc" = ""ELAN Touchpad""
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
-			register "wake" = "7"
-			register "detect" = "1"
-			device i2c 15 on end
-		end
-		chip drivers/i2c/hid
-			register "generic.hid" = ""PNP0C50""
-			register "generic.desc" = ""Synaptics Touchpad""
-			register "generic.irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
-			register "generic.wake" = "7"
-			register "generic.detect" = "1"
-			register "hid_desc_reg_offset" = "0x20"
-			device i2c 2c on end
-		end
-	end
-	device ref i2c_3 on
-		chip drivers/i2c/generic
-			register "hid" = ""RAYD0001""
-			register "desc" = ""Raydium Touchscreen""
-			register "probed" = "1"
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_11)"
-			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
-			register "reset_delay_ms" = "20"
-			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
-			register "enable_delay_ms" = "1"
-			register "has_power_resource" = "1"
-			device i2c 39 on end
-		end
-		chip drivers/i2c/generic
-			register "hid" = ""ELAN0001""
-			register "desc" = ""ELAN Touchscreen""
-			register "probed" = "1"
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_11)"
-			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
-			register "reset_delay_ms" = "20"
-			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
-			register "enable_delay_ms" = "1"
-			register "has_power_resource" = "1"
-			device i2c 10 on end
-		end
-	end
-end	#chip soc/amd/stoneyridge
diff --git a/src/mainboard/google/kahlee/variants/aleena/overridetree.cb b/src/mainboard/google/kahlee/variants/aleena/overridetree.cb
new file mode 100644
index 000000000000..93ec1fa50b4c
--- /dev/null
+++ b/src/mainboard/google/kahlee/variants/aleena/overridetree.cb
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+chip soc/amd/stoneyridge
+	register "stapm_percent" = "80"
+	register "stapm_time_ms" = "2500000"
+	register "stapm_power_mw" = "7800"
+
+	# Enable I2C0 for audio, USB3 hub at 400kHz
+	register "i2c[0]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 95,
+		.fall_time_ns = 3,
+	}"
+
+	# Enable I2C1 for H1 at 400kHz
+	register "i2c[1]" = "{
+		.early_init = 1,
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 45,
+		.fall_time_ns = 4,
+	}"
+
+	# Enable I2C2 for trackpad, pen at 400kHz
+	register "i2c[2]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 26,
+		.fall_time_ns = 11,
+	}"
+
+	# Enable I2C3 for touchscreen at 400kHz
+	register "i2c[3]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 20,
+		.fall_time_ns = 19,
+	}"
+
+	device ref i2c_2 on
+		chip drivers/i2c/generic
+			register "hid" = ""ELAN0000""
+			register "desc" = ""ELAN Touchpad""
+			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
+			register "wake" = "7"
+			register "detect" = "1"
+			device i2c 15 on end
+		end
+		chip drivers/i2c/hid
+			register "generic.hid" = ""PNP0C50""
+			register "generic.desc" = ""Synaptics Touchpad""
+			register "generic.irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
+			register "generic.wake" = "7"
+			register "generic.detect" = "1"
+			register "hid_desc_reg_offset" = "0x20"
+			device i2c 2c on end
+		end
+	end
+	device ref i2c_3 on
+		chip drivers/i2c/generic
+			register "hid" = ""RAYD0001""
+			register "desc" = ""Raydium Touchscreen""
+			register "probed" = "1"
+			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_11)"
+			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
+			register "reset_delay_ms" = "20"
+			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
+			register "enable_delay_ms" = "1"
+			register "has_power_resource" = "1"
+			device i2c 39 on end
+		end
+	end
+end	#chip soc/amd/stoneyridge
diff --git a/src/mainboard/google/kahlee/variants/grunt/devicetree.cb b/src/mainboard/google/kahlee/variants/baseboard/devicetree.cb
index a230e00ca703..e900acd4fe27 100644
--- a/src/mainboard/google/kahlee/variants/grunt/devicetree.cb
+++ b/src/mainboard/google/kahlee/variants/baseboard/devicetree.cb
@@ -1,3 +1,4 @@
+
 # SPDX-License-Identifier: GPL-2.0-only
 
 chip soc/amd/stoneyridge
@@ -8,38 +9,6 @@ chip soc/amd/stoneyridge
 	register "dram_clear_on_reset" = "DRAM_CONTENTS_KEEP"
 	register "uma_mode" = "UMAMODE_SPECIFIED_SIZE"
 	register "uma_size" = "32 * MiB"
-	register "stapm_percent" = "80"
-	register "stapm_time_ms" = "2500000"
-	register "stapm_power_mw" = "7800"
-
-	# Enable I2C0 for audio, USB3 hub at 400kHz
-	register "i2c[0]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 95,
-		.fall_time_ns = 3,
-	}"
-
-	# Enable I2C1 for H1 at 400kHz
-	register "i2c[1]" = "{
-		.early_init = 1,
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 62,
-		.fall_time_ns = 2,
-	}"
-
-	# Enable I2C2 for trackpad, pen at 400kHz
-	register "i2c[2]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 170,
-		.fall_time_ns = 91,
-	}"
-
-	# Enable I2C3 for touchscreen at 400kHz
-	register "i2c[3]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 84,
-		.fall_time_ns = 50,
-	}"
 
 	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
 				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
@@ -66,6 +35,7 @@ chip soc/amd/stoneyridge
 		end
 		device ref sdhci on end
 	end #domain
+
 	device ref i2c_0 on
 		chip drivers/generic/adau7002
 			device generic 0.0 on end
@@ -114,18 +84,6 @@ chip soc/amd/stoneyridge
 	end
 	device ref i2c_3 on
 		chip drivers/i2c/generic
-			register "hid" = ""RAYD0001""
-			register "desc" = ""Raydium Touchscreen""
-			register "probed" = "1"
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_11)"
-			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
-			register "reset_delay_ms" = "20"
-			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
-			register "enable_delay_ms" = "1"
-			register "has_power_resource" = "1"
-			device i2c 39 on end
-		end
-		chip drivers/i2c/generic
 			register "hid" = ""ELAN0001""
 			register "desc" = ""ELAN Touchscreen""
 			register "probed" = "1"
diff --git a/src/mainboard/google/kahlee/variants/careena/devicetree.cb b/src/mainboard/google/kahlee/variants/careena/overridetree.cb
index ece74038b7ba..9e74990d00f1 100644
--- a/src/mainboard/google/kahlee/variants/careena/devicetree.cb
+++ b/src/mainboard/google/kahlee/variants/careena/overridetree.cb
@@ -1,13 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 chip soc/amd/stoneyridge
-	register "spd_addr_lookup" = "
-	{
-		{ {0xA0, 0x00} }, // socket 0 - Channel 0, slot 0
-	}"
-	register "dram_clear_on_reset" = "DRAM_CONTENTS_KEEP"
-	register "uma_mode" = "UMAMODE_SPECIFIED_SIZE"
-	register "uma_size" = "32 * MiB"
 	register "stapm_percent" = "68"
 	register "stapm_time_ms" = "2500000"
 	register "stapm_power_mw" = "7800"
@@ -41,54 +34,11 @@ chip soc/amd/stoneyridge
 		.fall_time_ns = 19,
 	}"
 
-	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
-				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
-
-	device domain 0 on
-		device ref iommu off end # IOMMU (Disabled for performance and battery)
-		device ref gfx on end
-		device ref gfx_hda on end
-		device ref gpp_bridge_1 on end # WLAN
-		device ref gpp_bridge_3 on
-			chip drivers/generic/bayhub
-				register "power_saving" = "1"
-				device pci 00.0 on end
-			end
-		end
-		device ref hda_bridge on end
-		device ref hda on end
-		device ref xhci on end
-		device ref ehci on end
-		device ref lpc_bridge on
-			chip ec/google/chromeec
-				device pnp 0c09.0 on end
-			end
-		end
-		device ref sdhci on end
-	end #domain
 	device ref i2c_0 on
 		chip drivers/generic/adau7002
 			register "wakeup_delay" = "20"
 			device generic 0.0 on end
 		end
-		chip drivers/i2c/da7219
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_14)"
-			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""
-			register "mclk_name" = ""oscout1""
-			device i2c 1a on end
-		end
 		chip drivers/i2c/generic
 			register "hid" = ""10EC5682""
 			register "name" = ""RT58""
@@ -104,29 +54,6 @@ chip soc/amd/stoneyridge
 			register "property_list[1].string" = ""oscout1""
 			device i2c 1a on end
 		end
-		chip drivers/generic/max98357a
-			register "hid" = ""MX98357A""
-			register "sdmode_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_119)"
-			register "sdmode_delay" = "5"
-			device generic 0.1 on end
-		end
-	end
-	device ref i2c_1 on
-		chip drivers/i2c/tpm
-			register "hid" = ""GOOG0005""
-			register "desc" = ""Cr50 TPM""
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_9)"
-			device i2c 50 on end
-		end
-	end
-	device ref i2c_2 on
-		chip drivers/i2c/generic
-			register "hid" = ""ELAN0000""
-			register "desc" = ""ELAN Touchpad""
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
-			register "wake" = "7"
-			device i2c 15 on end
-		end
 	end
 	device ref i2c_3 on
 		chip drivers/i2c/generic
@@ -141,18 +68,6 @@ chip soc/amd/stoneyridge
 			register "has_power_resource" = "1"
 			device i2c 39 on end
 		end
-		chip drivers/i2c/generic
-			register "hid" = ""ELAN0001""
-			register "desc" = ""ELAN Touchscreen""
-			register "probed" = "1"
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_11)"
-			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
-			register "reset_delay_ms" = "20"
-			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
-			register "enable_delay_ms" = "1"
-			register "has_power_resource" = "1"
-			device i2c 10 on end
-		end
 		chip drivers/i2c/hid
 			register "generic.hid" = ""GTCH7503""
 			register "generic.desc" = ""G2TOUCH Touchscreen""
diff --git a/src/mainboard/google/kahlee/variants/grunt/overridetree.cb b/src/mainboard/google/kahlee/variants/grunt/overridetree.cb
new file mode 100644
index 000000000000..d1e6c3e8f3e7
--- /dev/null
+++ b/src/mainboard/google/kahlee/variants/grunt/overridetree.cb
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+chip soc/amd/stoneyridge
+	register "stapm_percent" = "80"
+	register "stapm_time_ms" = "2500000"
+	register "stapm_power_mw" = "7800"
+
+	# Enable I2C0 for audio, USB3 hub at 400kHz
+	register "i2c[0]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 95,
+		.fall_time_ns = 3,
+	}"
+
+	# Enable I2C1 for H1 at 400kHz
+	register "i2c[1]" = "{
+		.early_init = 1,
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 62,
+		.fall_time_ns = 2,
+	}"
+
+	# Enable I2C2 for trackpad, pen at 400kHz
+	register "i2c[2]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 170,
+		.fall_time_ns = 91,
+	}"
+
+	# Enable I2C3 for touchscreen at 400kHz
+	register "i2c[3]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 84,
+		.fall_time_ns = 50,
+	}"
+
+	device ref i2c_3 on
+		chip drivers/i2c/generic
+			register "hid" = ""RAYD0001""
+			register "desc" = ""Raydium Touchscreen""
+			register "probed" = "1"
+			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_11)"
+			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
+			register "reset_delay_ms" = "20"
+			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
+			register "enable_delay_ms" = "1"
+			register "has_power_resource" = "1"
+			device i2c 39 on end
+		end
+	end
+end	#chip soc/amd/stoneyridge
diff --git a/src/mainboard/google/kahlee/variants/liara/devicetree.cb b/src/mainboard/google/kahlee/variants/liara/devicetree.cb
deleted file mode 100644
index 34c3fdeefc55..000000000000
--- a/src/mainboard/google/kahlee/variants/liara/devicetree.cb
+++ /dev/null
@@ -1,151 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-
-chip soc/amd/stoneyridge
-	register "spd_addr_lookup" = "
-	{
-		{ {0xA0, 0x00} }, // socket 0 - Channel 0, slot 0
-	}"
-	register "dram_clear_on_reset" = "DRAM_CONTENTS_KEEP"
-	register "uma_mode" = "UMAMODE_SPECIFIED_SIZE"
-	register "uma_size" = "32 * MiB"
-	register "lvds_poseq_varybl_to_blon" = "0x5" # in 4ms
-	register "lvds_poseq_blon_to_varybl" = "0x5" # in 4ms
-
-	# Enable I2C0 for audio, USB3 hub at 400kHz
-	register "i2c[0]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 85,
-		.fall_time_ns = 3,
-	}"
-
-	# Enable I2C1 for H1 at 400kHz
-	register "i2c[1]" = "{
-		.early_init = 1,
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 3,
-		.fall_time_ns = 2,
-	}"
-
-	# Enable I2C2 for trackpad, pen at 400kHz
-	register "i2c[2]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 3,
-		.fall_time_ns = 2,
-	}"
-
-	# Enable I2C3 for touchscreen at 400kHz
-	register "i2c[3]" = "{
-		.speed = I2C_SPEED_FAST,
-		.rise_time_ns = 16,
-		.fall_time_ns = 8,
-	}"
-
-	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
-				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
-
-	device domain 0 on
-		device ref iommu off end # IOMMU (Disabled for performance and battery)
-		device ref gfx on end
-		device ref gfx_hda on end
-		device ref gpp_bridge_1 on end # WLAN
-		device ref gpp_bridge_3 on
-			chip drivers/generic/bayhub
-				register "power_saving" = "1"
-				device pci 00.0 on end
-			end
-		end
-		device ref hda_bridge on end
-		device ref hda on end
-		device ref xhci on end
-		device ref ehci on end
-		device ref lpc_bridge on
-			chip ec/google/chromeec
-				device pnp 0c09.0 on end
-			end
-		end
-		device ref sdhci on end
-	end #domain
-	device ref i2c_0 on
-		chip drivers/generic/adau7002
-			register "wakeup_delay" = "20"
-			device generic 0.0 on end
-		end
-		chip drivers/i2c/da7219
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_14)"
-			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""
-			register "mclk_name" = ""oscout1""
-			device i2c 1a on end
-		end
-		chip drivers/generic/max98357a
-			register "hid" = ""MX98357A""
-			register "sdmode_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_119)"
-			register "sdmode_delay" = "5"
-			device generic 0.1 on end
-		end
-	end
-	device ref i2c_1 on
-		chip drivers/i2c/tpm
-			register "hid" = ""GOOG0005""
-			register "desc" = ""Cr50 TPM""
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_9)"
-			device i2c 50 on end
-		end
-	end
-	device ref i2c_2 on
-		chip drivers/i2c/generic
-			register "hid" = ""ELAN0000""
-			register "desc" = ""ELAN Touchpad""
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
-			register "wake" = "7"
-			register "detect" = "1"
-			device i2c 15 on end
-		end
-		chip drivers/i2c/hid
-			register "generic.hid" = ""PNP0C50""
-			register "generic.desc" = ""Synaptics Touchpad""
-			register "generic.irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
-			register "generic.wake" = "7"
-			register "generic.detect" = "1"
-			register "hid_desc_reg_offset" = "0x20"
-			device i2c 2c on end
-		end
-	end
-	device ref i2c_3 on
-		chip drivers/i2c/generic
-			register "hid" = ""RAYD0001""
-			register "desc" = ""Raydium Touchscreen""
-			register "probed" = "1"
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_11)"
-			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
-			register "reset_delay_ms" = "20"
-			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
-			register "enable_delay_ms" = "1"
-			register "has_power_resource" = "1"
-			device i2c 39 on end
-		end
-		chip drivers/i2c/generic
-			register "hid" = ""ELAN0001""
-			register "desc" = ""ELAN Touchscreen""
-			register "probed" = "1"
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_11)"
-			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
-			register "reset_delay_ms" = "20"
-			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
-			register "enable_delay_ms" = "1"
-			register "has_power_resource" = "1"
-			device i2c 10 on end
-		end
-	end
-end	#chip soc/amd/stoneyridge
diff --git a/src/mainboard/google/kahlee/variants/liara/overridetree.cb b/src/mainboard/google/kahlee/variants/liara/overridetree.cb
new file mode 100644
index 000000000000..a80229fe1013
--- /dev/null
+++ b/src/mainboard/google/kahlee/variants/liara/overridetree.cb
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+chip soc/amd/stoneyridge
+	register "lvds_poseq_varybl_to_blon" = "0x5" # in 4ms
+	register "lvds_poseq_blon_to_varybl" = "0x5" # in 4ms
+
+	# Enable I2C0 for audio, USB3 hub at 400kHz
+	register "i2c[0]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 85,
+		.fall_time_ns = 3,
+	}"
+
+	# Enable I2C1 for H1 at 400kHz
+	register "i2c[1]" = "{
+		.early_init = 1,
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 3,
+		.fall_time_ns = 2,
+	}"
+
+	# Enable I2C2 for trackpad, pen at 400kHz
+	register "i2c[2]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 3,
+		.fall_time_ns = 2,
+	}"
+
+	# Enable I2C3 for touchscreen at 400kHz
+	register "i2c[3]" = "{
+		.speed = I2C_SPEED_FAST,
+		.rise_time_ns = 16,
+		.fall_time_ns = 8,
+	}"
+
+	device ref i2c_0 on
+		chip drivers/generic/adau7002
+			register "wakeup_delay" = "20"
+			device generic 0.0 on end
+		end
+	end
+	device ref i2c_2 on
+		chip drivers/i2c/generic
+			register "hid" = ""ELAN0000""
+			register "desc" = ""ELAN Touchpad""
+			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
+			register "wake" = "7"
+			register "detect" = "1"
+			device i2c 15 on end
+		end
+		chip drivers/i2c/hid
+			register "generic.hid" = ""PNP0C50""
+			register "generic.desc" = ""Synaptics Touchpad""
+			register "generic.irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_5)"
+			register "generic.wake" = "7"
+			register "generic.detect" = "1"
+			register "hid_desc_reg_offset" = "0x20"
+			device i2c 2c on end
+		end
+	end
+	device ref i2c_3 on
+		chip drivers/i2c/generic
+			register "hid" = ""RAYD0001""
+			register "desc" = ""Raydium Touchscreen""
+			register "probed" = "1"
+			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_11)"
+			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
+			register "reset_delay_ms" = "20"
+			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
+			register "enable_delay_ms" = "1"
+			register "has_power_resource" = "1"
+			device i2c 39 on end
+		end
+	end
+end	#chip soc/amd/stoneyridge
diff --git a/src/mainboard/google/kahlee/variants/nuwani/devicetree.cb b/src/mainboard/google/kahlee/variants/nuwani/overridetree.cb
index 894eb9df1005..2b4ef55192e9 100644
--- a/src/mainboard/google/kahlee/variants/nuwani/devicetree.cb
+++ b/src/mainboard/google/kahlee/variants/nuwani/overridetree.cb
@@ -1,13 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 chip soc/amd/stoneyridge
-	register "spd_addr_lookup" = "
-	{
-		{ {0xA0, 0x00} }, // socket 0 - Channel 0, slot 0
-	}"
-	register "dram_clear_on_reset" = "DRAM_CONTENTS_KEEP"
-	register "uma_mode" = "UMAMODE_SPECIFIED_SIZE"
-	register "uma_size" = "32 * MiB"
 	register "stapm_percent" = "80"
 	register "stapm_time_ms" = "2000000"
 	register "stapm_power_mw" = "7800"
@@ -44,14 +37,7 @@ chip soc/amd/stoneyridge
 		.fall_time_ns = 8,
 	}"
 
-	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
-				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
-
 	device domain 0 on
-		device ref iommu off end # IOMMU (Disabled for performance and battery)
-		device ref gfx on end
-		device ref gfx_hda on end
-		device ref gpp_bridge_1 on end # WLAN
 		device ref gpp_bridge_3 on
 			chip drivers/generic/bayhub
 				register "power_saving" = "1"
@@ -59,54 +45,8 @@ chip soc/amd/stoneyridge
 				device pci 00.0 on end
 			end
 		end
-		device ref hda_bridge on end
-		device ref hda on end
-		device ref xhci on end
-		device ref ehci on end
-		device ref lpc_bridge on
-			chip ec/google/chromeec
-				device pnp 0c09.0 on end
-			end
-		end
-		device ref sdhci on end
 	end #domain
-	device ref i2c_0 on
-		chip drivers/generic/adau7002
-			device generic 0.0 on end
-		end
-		chip drivers/i2c/da7219
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_14)"
-			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""
-			register "mclk_name" = ""oscout1""
-			device i2c 1a on end
-		end
-		chip drivers/generic/max98357a
-			register "hid" = ""MX98357A""
-			register "sdmode_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_119)"
-			register "sdmode_delay" = "5"
-			device generic 0.1 on end
-		end
-	end
-	device ref i2c_1 on
-		chip drivers/i2c/tpm
-			register "hid" = ""GOOG0005""
-			register "desc" = ""Cr50 TPM""
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_9)"
-			device i2c 50 on end
-		end
-	end
+
 	device ref i2c_2 on
 		chip drivers/i2c/generic
 			register "hid" = ""ELAN0000""
@@ -165,17 +105,5 @@ chip soc/amd/stoneyridge
 			register "has_power_resource" = "1"
 			device i2c 39 on end
 		end
-		chip drivers/i2c/generic
-			register "hid" = ""ELAN0001""
-			register "desc" = ""ELAN Touchscreen""
-			register "probed" = "1"
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_11)"
-			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
-			register "reset_delay_ms" = "20"
-			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
-			register "enable_delay_ms" = "1"
-			register "has_power_resource" = "1"
-			device i2c 10 on end
-		end
 	end
 end	#chip soc/amd/stoneyridge
diff --git a/src/mainboard/google/kahlee/variants/treeya/devicetree.cb b/src/mainboard/google/kahlee/variants/treeya/overridetree.cb
index e2f965a4c27d..2b835ad2c956 100644
--- a/src/mainboard/google/kahlee/variants/treeya/devicetree.cb
+++ b/src/mainboard/google/kahlee/variants/treeya/overridetree.cb
@@ -1,13 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 chip soc/amd/stoneyridge
-	register "spd_addr_lookup" = "
-	{
-		{ {0xA0, 0x00} }, // socket 0 - Channel 0, slot 0
-	}"
-	register "dram_clear_on_reset" = "DRAM_CONTENTS_KEEP"
-	register "uma_mode" = "UMAMODE_SPECIFIED_SIZE"
-	register "uma_size" = "32 * MiB"
 	register "stapm_percent" = "80"
 	register "stapm_time_ms" = "2000000"
 	register "stapm_power_mw" = "7800"
@@ -44,14 +37,7 @@ chip soc/amd/stoneyridge
 		.fall_time_ns = 8,
 	}"
 
-	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
-				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
-
 	device domain 0 on
-		device ref iommu off end # IOMMU (Disabled for performance and battery)
-		device ref gfx on end
-		device ref gfx_hda on end
-		device ref gpp_bridge_1 on end # WLAN
 		device ref gpp_bridge_3 on
 			chip drivers/generic/bayhub
 				register "power_saving" = "1"
@@ -59,39 +45,9 @@ chip soc/amd/stoneyridge
 				device pci 00.0 on end
 			end
 		end
-		device ref hda_bridge on end
-		device ref hda on end
-		device ref xhci on end
-		device ref ehci on end
-		device ref lpc_bridge on
-			chip ec/google/chromeec
-				device pnp 0c09.0 on end
-			end
-		end
-		device ref sdhci on end
 	end #domain
+
 	device ref i2c_0 on
-		chip drivers/generic/adau7002
-			device generic 0.0 on end
-		end
-		chip drivers/i2c/da7219
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_14)"
-			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""
-			register "mclk_name" = ""oscout1""
-			device i2c 1a on end
-		end
 		chip drivers/i2c/generic
 			register "hid" = ""10EC5682""
 			register "name" = ""RT58""
@@ -107,20 +63,6 @@ chip soc/amd/stoneyridge
 			register "property_list[1].string" = ""oscout1""
 			device i2c 1a on end
 		end
-		chip drivers/generic/max98357a
-			register "hid" = ""MX98357A""
-			register "sdmode_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_119)"
-			register "sdmode_delay" = "5"
-			device generic 0.1 on end
-		end
-	end
-	device ref i2c_1 on
-		chip drivers/i2c/tpm
-			register "hid" = ""GOOG0005""
-			register "desc" = ""Cr50 TPM""
-			register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_9)"
-			device i2c 50 on end
-		end
 	end
 	device ref i2c_2 on
 		chip drivers/i2c/generic
@@ -167,17 +109,5 @@ chip soc/amd/stoneyridge
 			register "has_power_resource" = "1"
 			device i2c 39 on end
 		end
-		chip drivers/i2c/generic
-			register "hid" = ""ELAN0001""
-			register "desc" = ""ELAN Touchscreen""
-			register "probed" = "1"
-			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_11)"
-			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_85)"
-			register "reset_delay_ms" = "20"
-			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_76)"
-			register "enable_delay_ms" = "1"
-			register "has_power_resource" = "1"
-			device i2c 10 on end
-		end
 	end
 end	#chip soc/amd/stoneyridge