backlight: add support for Toppoly TDO35S series to tdo24m lcd driver

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Acked-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
diff --git a/include/linux/spi/tdo24m.h b/include/linux/spi/tdo24m.h
new file mode 100644
index 0000000..7572d4e
--- /dev/null
+++ b/include/linux/spi/tdo24m.h
@@ -0,0 +1,13 @@
+#ifndef __TDO24M_H__
+#define __TDO24M_H__
+
+enum tdo24m_model {
+	TDO24M,
+	TDO35S,
+};
+
+struct tdo24m_platform_data {
+	enum tdo24m_model model;
+};
+
+#endif /* __TDO24M_H__ */