Compilation of drivers for hybrid Devices

Hybrid device

Definition:LinUXA diversity of devices that cannot be categorized is defined as a hybrid device., ImageLED, Buttons, etc.All devices are assigned a master device number 10, but each device can select a separate sub-device number.
Use a hybrid DeviceStruct miscdeviceStruct to describe,The hybrid driver can complete all the steps of the character driver by calling misc_register:

 

# Include <Linux/miscdevice. h>

 

Create oneMiscdeviceStruct

Static struct miscdevice MISC = {

. Minor = misc_dynamic_minor,

. Name = device_name,

. Fops = & dev_fops,

};

Register this hybrid device in driver function Initialization

Misc_register (& MISC );

Cancel the device when the driver is detached.

Misc_deregister (& MISC );

 

Hybrid deviceMiscdeviceDescription

MiscdeviceStruct

Struct miscdevice {

Int minor;

Const char * Name;

Const struct file_operations * fops;

Struct list_head list;

Struct device * parent;

Struct device * this_device;

Const char * nodename;

Mode_t mode;

};

Device registration and cancellation

Extern int misc_register (structmiscdevice * MISC );

Extern int misc_deregister (structmiscdevice * MISC );

 

write led Program is driven by a device, Io put the port configuration in device initialization; led control usage IOCTL , for gpio all the operating functions are in

# Include <Mach/gpio-fns.h>

, Such

Voids3c2410_gpio_cfgpin (unsigned int pin, unsigned int function );

Voids3c2410_gpio_setpin (unsigned int pin, unsigned int );

Voids3c2410_gpio_pullup (unsigned int pin, unsigned int );

Unsigned ints3c2410_gpio_getpin (unsigned int pin );

 

WhileGpioThe port is defined in

# Include <Mach/regs-gpio.h>

, Such

S3c2410_gpbcon

S3c2410_gpbdat

S3c2410_gpbup