drivers: auxdisplay: Add TM1637 7-segment display driver

Add a new auxdisplay driver for TM1637 7-segment LED displays.

The driver supports:
- 4-digit 7-segment display output
- Decimal point positioning
- Brightness control (0-7 levels)
- Display on/off control
- Alphabet character support (A-Z, a-z) and digits (0-9)
- Basic cursor positioning

The driver implements the standard AUXDISPLAY API

Signed-off-by: Siratul Islam <[email protected]>

Author: heronet

drivers/auxdisplay/CMakeLists.txt

@@ -10,3 +10,4 @@ zephyr_library_sources_ifdef(CONFIG_AUXDISPLAY_ITRON		auxdisplay_itron.c)
 zephyr_library_sources_ifdef(CONFIG_AUXDISPLAY_JHD1313		auxdisplay_jhd1313.c)
 zephyr_library_sources_ifdef(CONFIG_AUXDISPLAY_PT6314		auxdisplay_pt6314.c)
 zephyr_library_sources_ifdef(CONFIG_AUXDISPLAY_SERLCD		auxdisplay_serlcd.c)
+zephyr_library_sources_ifdef(CONFIG_AUXDISPLAY_TM1637		auxdisplay_tm1637.c)

drivers/auxdisplay/Kconfig

@@ -26,5 +26,6 @@ source "drivers/auxdisplay/Kconfig.itron"
 source "drivers/auxdisplay/Kconfig.jhd1313"
 source "drivers/auxdisplay/Kconfig.pt6314"
 source "drivers/auxdisplay/Kconfig.serlcd"
+source "drivers/auxdisplay/Kconfig.tm1637"
 
 endif # AUXDISPLAY

drivers/auxdisplay/Kconfig.tm1637

@@ -0,0 +1,18 @@
+# Copyright (c) 2025 Siratul Islam
+# SPDX-License-Identifier: Apache-2.0
+
+config AUXDISPLAY_TM1637
+	bool "Titan Micro TM1637 7-segment display support"
+	default y
+	select GPIO
+	depends on DT_HAS_TITANMICRO_TM1637_ENABLED
+	help
+	  Enable driver for TM (Shenzhen Titan Micro Elec) TM1637 7-segment LED display.
+	  This driver supports 4-digit 7-segment displays commonly found in clock modules
+	  and simple numeric displays.
+
+	  The TM1637 uses a two-wire serial interface (CLK and DIO) and can control up to
+	  4 digits with brightness control.
+
+	  This driver implements the auxdisplay API, allowing generic display usage.
+	  Helper APIs for direct number display are also available.