platform/x86: touchscreen_dmi: Add info for the Onda V820w tablet

Add touchscreen platform data for the Onda V820w tablet.
Signed-off-by: Jun Bo Bi <jambonmcyeah@gmail.com>
[andy: fixed compilation error, massaged commit message]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/touchscreen_dmi.c

@@ -221,6 +221,22 @@ static const struct ts_dmi_data onda_obook_20_plus_data = {
 	.properties	= onda_obook_20_plus_props,
 };
 
+static const struct property_entry onda_v820w_32g_props[] = {
+	PROPERTY_ENTRY_U32("touchscreen-size-x", 1665),
+	PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
+	PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
+	PROPERTY_ENTRY_STRING("firmware-name",
+			      "gsl1680-onda-v820w-32g.fw"),
+	PROPERTY_ENTRY_U32("silead,max-fingers", 10),
+	PROPERTY_ENTRY_BOOL("silead,home-button"),
+	{ }
+};
+
+static const struct ts_dmi_data onda_v820w_32g_data = {
+	.acpi_name	= "MSSL1680:00",
+	.properties	= onda_v820w_32g_props,
+};
+
 static const struct property_entry onda_v891w_v1_props[] = {
 	PROPERTY_ENTRY_U32("touchscreen-min-x", 46),
 	PROPERTY_ENTRY_U32("touchscreen-min-y",  8),
@@ -513,6 +529,14 @@ static const struct dmi_system_id touchscreen_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "OBOOK 20 PLUS"),
 		},
 	},
+	{
+		/* ONDA V820w DualOS */
+		.driver_data = (void *)&onda_v820w_32g_data,
+		.matches = {
+			DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "ONDA"),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "V820w DualOS")
+		},
+	},
 	{
 		/* ONDA V891w revision P891WBEBV1B00 aka v1 */
 		.driver_data = (void *)&onda_v891w_v1_data,