[RFC PATCH 3/3] HID: spi-hid-of: add the Surface Pro X touch digitizer

@@ -62,6 +62,24 @@ static const struct spi_hid_of_data microsoft_g6_data = {
 	.minimal_reset_delay_ms = 100,
 };
 
+/*
+ * The Surface Pro X digitizer implements the pre-release protocol revision.
+ * Input report header and body are both read from 0x1000, and the device
+ * descriptor is requested from register 1.
+ */
+static const struct spi_hid_of_data microsoft_surface_pro_x_data = {
+	.conf = {
+		.input_report_header_address = 0x1000,
+		.input_report_body_address = 0x1000,
+		.output_report_address = 0x1,
+		.read_opcode = 0x0b,
+		.write_opcode = 0x02,
+		.protocol = SPI_HID_PROTOCOL_V2,
+	},
+	.post_power_on_delay_ms = 10,
+	.minimal_reset_delay_ms = 100,
+};
+
 static int spi_hid_of_populate_config(struct spi_hid_of_config *conf,
 				      struct device *dev)
 {

@@ -181,12 +199,20 @@ static int spi_hid_of_probe(struct spi_device *spi)
 
 static const struct of_device_id spi_hid_of_match[] = {
 	{ .compatible = "microsoft,g6-touch-digitizer", .data = &microsoft_g6_data },
+	{
+		.compatible = "microsoft,surface-pro-x-touch-digitizer",
+		.data = &microsoft_surface_pro_x_data
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, spi_hid_of_match);
 
 static const struct spi_device_id spi_hid_of_id_table[] = {
 	{ .name = "g6-touch-digitizer", .driver_data = (kernel_ulong_t)&microsoft_g6_data },
+	{
+		.name = "surface-pro-x-touch-digitizer",
+		.driver_data = (kernel_ulong_t)&microsoft_surface_pro_x_data
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, spi_hid_of_id_table);