This patch series addresses a concurrency issue in the ads7871 driver and 
modernizes it to use the current hwmon API.

Patch 1: Adds a mutex to the driver's private data to serialize SPI 
transactions. Previously, if userspace read multiple 
channels concurrently, the driver could overwrite ongoing REG_GAIN_MUX 
writes before the conversion completed.

Patch 2: Converts the driver to use hwmon_device_register_with_info(). 
This architectural shift removes boilerplate code and delegates sysfs 
management to the hwmon core:
 - Removes manual file creators (SENSOR_DEVICE_ATTR_RO and ads7871_attrs).
 - Implements ads7871_is_visible() for dynamic permission control.
 - Replaces the sysfs-specific voltage_show() with a 
standard ads7871_read() callback.
 - Defines supported channels via hwmon_channel_info.

Tabrez Ahmed (2):
  hwmon: (ads7871) Add mutex to serialize SPI transactions
  hwmon: (ads7871) Convert to hwmon_device_register_with_info

 drivers/hwmon/ads7871.c | 91 +++++++++++++++++++++++------------------
 1 file changed, 52 insertions(+), 39 deletions(-)

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2.43.0