Linux Device Drivers Development

init data structure

There are two ways to pass regulator_init_data to a driver; this can be done by platform data in the board initialization file or by a node in the device tree using the of_get_regulator_init_data function:

struct regulator_init_data { 
   struct regulation_constraints constraints; 
 
   /* optional regulator machine specific init */ 
   int (*regulator_init)(void *driver_data); 
   void *driver_data;      /* core does not touch this */ 
}; 

The following are the meanings of elements in the structure:

• constraints represents the regulator constraints
• regulator_init is an optional callback invoked at a given moment when the core registers the regulator
• driver_data represents the data passed to regulator_init

As you can see, the struct constraints ...