[PATCH v4 0/3] hwmon: (ads7871) Fix endianness and modernize driver

[Tabrez Ahmed]

This series addresses several issues in the ads7871 driver. It fixes an
architecture-dependent endianness bug in the 16-bit register read logic,
migrates the driver to the modern hwmon_device_register_with_info() API,
and moves the SPI transfer buffer into the driver's private data structure
to ensure DMA safety.

Note: I do not have access to the physical ADS7871 hardware. This
series has been compile-tested only.

Changes in v4:
- Fixed an additional Big-Endian hazard where passing a pointer
  to a 32-bit 'int' for a 1-byte SPI write transmitted the wrong command
  byte. Refactored to use a dedicated 'u8' transmit variable.

Changes in v3:
- Added Patch 1 to fix the pre-existing endianness bug in 16-bit reads,
  originally flagged by Sashiko AI.
- Fixed multiple formatting and alignment issues caught by checkpatch
  --strict, as requested by Guenter Roeck.
- Added "While at it, fix checkpatch violations" to Patch 2 commit message.

Changes in v2:
- Dropped custom mutex in favor of native hwmon core serialization.
- Split API migration and DMA fix into separate, logical patches.
- Corrected output scaling and sign extension to meet hwmon ABI.

Tabrez Ahmed (3):
  hwmon: (ads7871) Fix endianness bug in 16-bit register reads
  hwmon: (ads7871) Convert to hwmon_device_register_with_info
  hwmon: (ads7871) Use DMA-safe buffer for SPI writes

 drivers/hwmon/ads7871.c | 121 +++++++++++++++++++++++-----------------
 1 file changed, 71 insertions(+), 50 deletions(-)

-- 
2.43.0