include: dt-bindings: display: add defines for STM32 LTDC

Add defines for specifying RGB interface signal
polarities for STM32 LTDC peripheral

Signed-off-by: Tomislav Milkovic <[email protected]>

Author: tmilkovic51

include/dt-bindings/display/stm32_ltdc.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2022 Byte-Lab d.o.o. <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_DISPLAY_STM32_LTDC_H_
+#define ZEPHYR_INCLUDE_DT_BINDINGS_DISPLAY_STM32_LTDC_H_
+
+/* Horizontal synchronization pulse polarity */
+#define STM32_LTDC_HSPOL_ACTIVE_LOW     0x00000000
+#define STM32_LTDC_HSPOL_ACTIVE_HIGH    0x80000000
+
+/* Vertical synchronization pulse polarity */
+#define STM32_LTDC_VSPOL_ACTIVE_LOW     0x00000000
+#define STM32_LTDC_VSPOL_ACTIVE_HIGH    0x40000000
+
+/* Data enable pulse polarity */
+#define STM32_LTDC_DEPOL_ACTIVE_LOW     0x00000000
+#define STM32_LTDC_DEPOL_ACTIVE_HIGH    0x20000000
+
+/* Pixel clock polarity */
+#define STM32_LTDC_PCPOL_ACTIVE_LOW     0x00000000
+#define STM32_LTDC_PCPOL_ACTIVE_HIGH    0x10000000
+
+#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_DISPLAY_STM32_LTDC_H_ */