drivers/sensors: add Microchip TC74 temperature sensor driver

[daniel-p-carvalho]

Summary

• Add driver for the Microchip TC74 digital temperature sensor using the Sensor Driver Framework (uORB).
• Registers as a uORB topic (/dev/uorb/sensor_temp<n>) via tc74_register(devno, i2c, addr).
• Implements background sampling via the low-priority work queue with configurable interval (set_interval).
• Automatically manages low-power standby mode when activated and deactivated.
• Documentation added under Documentation/components/drivers/special/sensors/tc74.rst.

Impact

• New sensor driver only; fully conforms to the modern Sensor Driver Framework. No changes or breakage to existing drivers.

Testing

• tools/checkpatch.sh -g HEAD clean (all checks pass).
• Built and validated on real hardware: Pextron R550 (STM32H743BI) connected to a Microchip TC74A5-3.3 on I2C bus 0 (address 0x4D).
• Verified with official sensortest:
  • 1 Hz default interval:

    nsh> sensortest -n 5 temp0
    SensorTest: Test /dev/uorb/sensor_temp0 with interval(1000000us), latency(0us)
    temp0: timestamp:36070441 value:32.00
    temp0: timestamp:37070468 value:32.00
    temp0: timestamp:38070493 value:32.00
    temp0: timestamp:39070518 value:32.00
    temp0: timestamp:40070544 value:32.00
    SensorTest: Received message: temp0, number:5/5
    

  • Dynamic interval change (5 Hz / 200 ms):

    nsh> sensortest -i 200000 -n 5 temp0
    SensorTest: Test /dev/uorb/sensor_temp0 with interval(200000us), latency(0us)
    temp0: timestamp:48915000 value:32.00
    temp0: timestamp:49115025 value:32.00
    temp0: timestamp:49315049 value:32.00
    temp0: timestamp:49515075 value:32.00
    temp0: timestamp:49715101 value:32.00
    SensorTest: Received message: temp0, number:5/5
    

[github-actions]

MemBrowse Memory Report

No memory changes detected for:

• arduino-mega2560
• esp32-devkitc
• hifive1-revb
• mirtoo
• qemu-armv8a
• qemu-intel64
• rx65n-rsk2mb
• s698pm-dkit
• stm32-nucleo-f103rb

[acassis]

@raiden00pl what is this issue:

[linguini1]

Can you please use the sensor driver framework? That is what NuttX is moving to for sensor drivers.

[acassis]

@raiden00pl what is this issue:

Ok, found apache/nuttx-apps#3790

[daniel-p-carvalho]

Updated the PR addressing all review feedback:

• Migrated the driver to the modern Sensor Driver Framework (uORB) as requested by @linguini1. It now publishes as /dev/uorb/sensor_temp<n> via tc74_register().
• Removed the redundant #if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_TC74) from the .c file as noted by @xiaoxiang781216.
• Removed legacy fallback code, unnecessary casts and internal register #defines from the public header.
• Added documentation under Documentation/components/drivers/special/sensors/tc74.rst.
• Validated on real hardware with an STM32H743BI board and sensortest (default 1 Hz, custom intervals, and automatic standby upon topic deactivation).
• Squashed into a single clean commit with tools/checkpatch.sh -g HEAD passing.

[linguini1]

Please include the 'Assisted-by' field in your commit to indicate AI usage, as per the contribution guide.

[daniel-p-carvalho]

Added Assisted-by tag to the commit message per contribution guidelines.

fixed