mb/google/brya/var/trulo: Add LSIO descriptions

This patch adds descriptions for Low Speed I/O (I2Cx, GSPIx, UARTx)
to the device tree.

It also includes entries that will generate ACPI code at runtime
with LSIO end-point device.

BUG=b:351976770
TEST=Builds successfully for google/trulo.

Change-Id: I94a3a7f6f85d84407f32ab4c879b236a80859f2d
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83550
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 98 insertions, 0 deletions

diff --git a/src/mainboard/google/brya/variants/trulo/overridetree.cb b/src/mainboard/google/brya/variants/trulo/overridetree.cb
index 03f7f9e552..febc1ded58 100644
--- a/src/mainboard/google/brya/variants/trulo/overridetree.cb
+++ b/src/mainboard/google/brya/variants/trulo/overridetree.cb
@@ -24,6 +24,67 @@ chip soc/intel/alderlake
 	# Bit 1,3 - AUX lines are not swapped on the motherboard for either C0 or C1.
 	register "tcss_aux_ori" = "0"
 
+	register "serial_io_i2c_mode" = "{
+		[PchSerialIoIndexI2C0] = PchSerialIoPci,
+		[PchSerialIoIndexI2C1] = PchSerialIoPci,
+		[PchSerialIoIndexI2C2] = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C3] = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C4] = PchSerialIoDisabled,
+		[PchSerialIoIndexI2C5] = PchSerialIoPci,
+	}"
+
+	register "serial_io_gspi_mode" = "{
+		[PchSerialIoIndexGSPI0] = PchSerialIoDisabled,
+		[PchSerialIoIndexGSPI1] = PchSerialIoDisabled,
+	}"
+
+	register "serial_io_uart_mode" = "{
+		[PchSerialIoIndexUART0] = PchSerialIoPci,
+		[PchSerialIoIndexUART1] = PchSerialIoDisabled,
+		[PchSerialIoIndexUART2] = PchSerialIoDisabled,
+	}"
+
+	# Intel Common SoC Config
+	#+-------------------+---------------------------+
+	#| Field             |  Value                    |
+	#+-------------------+---------------------------+
+	#| I2C0              | TPM. Early init is        |
+	#|                   | required to set up a BAR  |
+	#|                   | for TPM communication     |
+	#| I2C1              | Trackpad                  |
+	#| I2C5              | Touchscreen               |
+	#+-------------------+---------------------------+
+	register "common_soc_config" = "{
+		.i2c[0] = {
+			.early_init = 1,
+			.speed = I2C_SPEED_FAST_PLUS,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST_PLUS,
+				.scl_lcnt = 55,
+				.scl_hcnt = 30,
+				.sda_hold = 7,
+			}
+		},
+		.i2c[1] = {
+			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 158,
+				.scl_hcnt = 79,
+				.sda_hold = 7,
+			}
+		},
+		.i2c[5] = {
+			.speed = I2C_SPEED_FAST,
+			.speed_config[0] = {
+				.speed = I2C_SPEED_FAST,
+				.scl_lcnt = 158,
+				.scl_hcnt = 79,
+				.sda_hold = 7,
+			}
+		},
+	}"
+
 	device domain 0 on
 		device ref igpu on end
 		device ref tcss_xhci on
@@ -93,6 +154,42 @@ chip soc/intel/alderlake
 			end
 		end
 		device ref shared_sram on end
+		device ref i2c0 on
+			chip drivers/i2c/tpm
+				register "hid" = ""GOOG0005""
+				register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_A17_IRQ)"
+				device i2c 50 on end
+			end
+		end #I2C0
+		device ref i2c1 on
+			chip drivers/i2c/generic
+				register "hid" = ""ELAN0000""
+				register "desc" = ""ELAN Touchpad""
+				register "irq" = "ACPI_IRQ_WAKE_LEVEL_LOW(GPP_B3_IRQ)"
+				register "wake" = "GPE0_DW1_03"
+				register "detect" = "1"
+				device i2c 15 on end
+			end
+		end #I2C1
+		device ref i2c5 on
+			chip drivers/i2c/hid
+				register "generic.hid" = ""ELAN9004""
+				register "generic.desc" = ""ELAN Touchscreen""
+				register "generic.irq" = "ACPI_IRQ_LEVEL_LOW(GPP_D16_IRQ)"
+				register "generic.detect" = "1"
+				register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_D15)"
+				register "generic.reset_delay_ms" = "20"
+				register "generic.reset_off_delay_ms" = "2"
+				register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_E17)"
+				register "generic.enable_delay_ms" = "1"
+				register "generic.stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_A21)"
+				register "generic.stop_delay_ms" = "150"
+				register "generic.stop_off_delay_ms" = "2"
+				register "generic.has_power_resource" = "1"
+				register "hid_desc_reg_offset" = "0x01"
+				device i2c 10 on end
+			end
+		end #I2C5
 		device ref heci1 on end
 		device ref emmc on end
 		device ref ish on
@@ -102,6 +199,7 @@ chip soc/intel/alderlake
 			end
 		end
 		device ref ufs on end
+		device ref uart0 on end
 		device ref pch_espi on
 			chip ec/google/chromeec
 				use conn0 as mux_conn[0]