hwmon: (applesmc) Convert to hwmon_device_register_with_info

The legacy hwmon_device_register() function is deprecated and triggers
warnings in dmesg. Convert the driver to the modern
hwmon_device_register_with_info() API.

This conversion does the following:
- Dynamically allocates standard HWMON temp, fan, and pwm channels.
- Configures HWMON ops callbacks (.is_visible, .read, .read_string, .write).
- Standardizes attribute naming to match the HWMON ABI:
  - fanX_output -> fanX_target (HWMON_F_TARGET)
  - fanX_manual -> pwmX_enable (HWMON_PWM_ENABLE)
- Dynamically registers non-standard fanX_safe attributes under the HWMON
  class directory via extra_groups.
- Cleans up legacy sysfs nodes, groups, and unused show/store static functions
  to avoid unused symbol compiler warnings.
- Avoids recursive mutex deadlocks when writing to pwmX_enable by locklessly
  resolving the entry and invoking the underlying raw SMC read/write calls.
- Avoids UAF race condition on module exit by using unmanaged registration and
  explicitly calling hwmon_device_unregister() as the first step of applesmc_exit(),
  guaranteeing that HWMON nodes are destroyed before static structures are freed.

Signed-off-by: Shih-Yuan Lee <fourdollars@debian.org>
Link: https://lore.kernel.org/r/20260711093323.14529-4-fourdollars@debian.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

0 files changed, 0 insertions, 0 deletions