diff --git a/src/mainboard/google/octopus/Kconfig b/src/mainboard/google/octopus/Kconfig
index 7b07c2ca24..f67f64272c 100644
--- a/src/mainboard/google/octopus/Kconfig
+++ b/src/mainboard/google/octopus/Kconfig
@@ -8,6 +8,7 @@ config BOARD_GOOGLE_BASEBOARD_OCTOPUS
 	select DRIVERS_I2C_DA7219
 	select DRIVERS_I2C_GENERIC
 	select DRIVERS_I2C_HID
+	select DRIVERS_I2C_SX9310
 	select DRIVERS_SPI_ACPI
 	select DRIVERS_USB_ACPI
 	select EC_GOOGLE_CHROMEEC
diff --git a/src/mainboard/google/octopus/variants/bobba/overridetree.cb b/src/mainboard/google/octopus/variants/bobba/overridetree.cb
index 0230a29a89..6cd4c61796 100644
--- a/src/mainboard/google/octopus/variants/bobba/overridetree.cb
+++ b/src/mainboard/google/octopus/variants/bobba/overridetree.cb
@@ -67,6 +67,12 @@ chip soc/intel/apollolake
 			.rise_time_ns = 88,
 			.fall_time_ns = 16,
 		},
+		.i2c[1] = {
+			.speed = I2C_SPEED_FAST,
+			.rise_time_ns = 66,
+			.fall_time_ns = 90,
+			.data_hold_time_ns = 350,
+		},
 		.i2c[5] = {
 			.speed = I2C_SPEED_FAST,
 			.rise_time_ns = 104,
@@ -109,6 +115,37 @@ chip soc/intel/apollolake
 				device generic 0 on end
 			end
 		end	# - I2C 0
+		device pci 16.1 on
+			chip drivers/i2c/sx9310
+				register "desc" = ""SAR Proximity Sensor""
+				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_214_IRQ)"
+				register "uid" = "1"
+				register "reg_prox_ctrl0" = "0x10"
+				register "reg_prox_ctrl1" = "0x00"
+				register "reg_prox_ctrl2" = "0x84"
+				register "reg_prox_ctrl3" = "0x0e"
+				register "reg_prox_ctrl4" = "0x07"
+				register "reg_prox_ctrl5" = "0xc6"
+				register "reg_prox_ctrl6" = "0x20"
+				register "reg_prox_ctrl7" = "0x0d"
+				register "reg_prox_ctrl8" = "0x8d"
+				register "reg_prox_ctrl9" = "0x43"
+				register "reg_prox_ctrl10" = "0x11"
+				register "reg_prox_ctrl11" = "0x00"
+				register "reg_prox_ctrl12" = "0x00"
+				register "reg_prox_ctrl13" = "0x00"
+				register "reg_prox_ctrl14" = "0x00"
+				register "reg_prox_ctrl15" = "0x00"
+				register "reg_prox_ctrl16" = "0x00"
+				register "reg_prox_ctrl17" = "0x00"
+				register "reg_prox_ctrl18" = "0x00"
+				register "reg_prox_ctrl19" = "0x00"
+				register "reg_sar_ctrl0" = "0x50"
+				register "reg_sar_ctrl1" = "0x8a"
+				register "reg_sar_ctrl2" = "0x3c"
+				device i2c 28 on end
+			end
+		end	# - I2C 1
 		device pci 17.1 on
 			chip drivers/i2c/da7219
 				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPIO_137_IRQ)"