2 files changed, 32 insertions, 0 deletions
diff --git a/src/drivers/i2c/generic/chip.h b/src/drivers/i2c/generic/chip.h
index 8e13ffc7bb..227cb61e18 100644
--- a/src/drivers/i2c/generic/chip.h
+++ b/src/drivers/i2c/generic/chip.h
@@ -69,6 +69,19 @@ struct drivers_i2c_generic_config {
 	/* Delay to be inserted after enabling stop. */
 	unsigned int stop_off_delay_ms;
 
+	/*
+	 * The Rotation Matrix' allows specifying a 3x3 matrix representing
+	 * the orientation of devices, such as accelerometers. Each value in
+	 * the matrix can be one of -1, 0, or 1, indicating the transformation
+	 * applied to the device's axes.
+	 *
+	 * It is expected by linux and required for the OS to correctly interpret
+	 * the data from the device.
+	 */
+	bool has_rotation_matrix;
+	int rotation_matrix[9];
+
+
 	/* Generic properties for exporting device-specific data to the OS */
 	struct acpi_dp property_list[MAX_GENERIC_PROPERTY_LIST];
 	int property_count;
diff --git a/src/drivers/i2c/generic/generic.c b/src/drivers/i2c/generic/generic.c
index 2a4acb242f..03018eed55 100644
--- a/src/drivers/i2c/generic/generic.c
+++ b/src/drivers/i2c/generic/generic.c
@@ -160,6 +160,25 @@ void i2c_generic_fill_ssdt(const struct device *dev,
 		acpi_device_add_power_res(&power_res_params);
 	}
 
+	/* Rotation Matrix */
+	if (config->has_rotation_matrix) {
+		acpigen_write_method("ROTM", 0);
+		acpigen_write_package(3);
+
+		for (int i = 0; i < 3; i++) {
+			char matrix_row[12];
+			snprintf(matrix_row, sizeof(matrix_row), "%d %d %d",
+				 config->rotation_matrix[i * 3 + 0],
+				 config->rotation_matrix[i * 3 + 1],
+				 config->rotation_matrix[i * 3 + 2]);
+
+			acpigen_write_string(matrix_row);
+		}
+
+		acpigen_pop_len();
+		acpigen_pop_len();
+	}
+
 	/* Callback if any. */
 	if (callback)
 		callback(dev);