spi-dev.c File Reference

spi bus character device /dev/spi-x access interface More...

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/version.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <linux/spi.h>

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Defines
#define	DEBUG
#define	SPI_MAX_MSG_SIZE   8192
#define	SPI_MAX_MSGS   42
#define	SPI_ADAP_MAX   4
#define	SPIDEV_ADAPS_MAX   SPI_ADAP_MAX
Functions
ssize_t	spidev_read (struct file *file, char *buf, size_t count, loff_t *offset)
ssize_t	spidev_write (struct file *file, const char *buf, size_t count, loff_t *offset)
int	spidev_open (struct inode *inode, struct file *file)
int	spidev_release (struct inode *inode, struct file *file)
int	spidev_attach_adapter (struct spi_adapter *adap)
	notify that new adapter has been attached. Build new minor device entry for this new adapter
int	spidev_detach_client (struct spi_client *client)
int	spidev_command (struct spi_client *client, unsigned int cmd, void *arg)
int	spidev_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
int __init	spi_dev_init (void)
void	spidev_cleanup (void)
	MODULE_AUTHOR ("Kate Alhola< kate(at) katix.org > Jamey Hicks< jamey.hicks @compaq.com > Frodo Looijaard< frodol @dds.nl > and Simon G.Vogl< simon @tk.uni-linz.ac.at >")
	MODULE_DESCRIPTION ("SPI/dev entries driver")
	MODULE_LICENSE ("GPL")
	module_init (spi_dev_init)
	module_exit (spidev_cleanup)
Variables
file_operations	spidev_fops
spi_adapter *	spidev_adaps [SPIDEV_ADAPS_MAX]
spi_driver	spidev_driver
	spidev_driver struct to register us as a spi driver to spi-core
spi_client	spidev_client_template
int	spidev_initialized
	EXPORT_NO_SYMBOLS

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Detailed Description

spi bus character device /dev/spi-x access interface

• spi-bus driver, character device interface

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Function Documentation

int __init spi_dev_init (  void   )  [static]

spi_dev_init(void) module init function

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int spidev_attach_adapter (  struct spi_adapter *  adap  )  [static]

notify that new adapter has been attached. Build new minor device entry for this new adapter spidev_attach_adapter - notify that new adapter has been attached Parameters: adap:  spi_adapter structure of new adapter

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int spidev_ioctl (  struct inode *  inode, struct file *  file, unsigned int  cmd, unsigned long  arg )  [static]

spidev_ioctl - read() hook for kernel Parameters: inode:  kernel inode structure file:  kernel file structure cmd:  ioctl command code arg:  ioctl command argument

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int spidev_open (  struct inode *  inode, struct file *  file )  [static]

spidev_open - open() hook for kernel Parameters: inode:  kernel inode structure file:  kernel file structure

ssize_t spidev_read (  struct file *  file, char *  buf, size_t  count, loff_t *  offset )  [static]

spidev_read - read() hook for kernel Parameters: file:  kernel file structure buf:  buffer for bytes to send count:  number of bytes to send offset:  not used

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int spidev_release (  struct inode *  inode, struct file *  file )  [static]

spidev_release - close() hook for kernel Parameters: inode:  kernel inode structure file:  kernel file structure

ssize_t spidev_write (  struct file *  file, const char *  buf, size_t  count, loff_t *  offset )  [static]

spidev_write - write() hook for kernel Parameters: file:  kernel file structure buf:  buffer for bytes to send count:  number of bytes to send offset:  not used

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Variable Documentation

struct spi_client spidev_client_template [static]

Initial value: { name: "SPI /dev entry", adapter: NULL, driver: &spidev_driver, addr: 0, }

struct spi_driver spidev_driver [static]

Initial value: { name: "spi-dev dummy driver", flags: SPI_DF_DUMMY, attach_adapter: spidev_attach_adapter, detach_client: spidev_detach_client, command: spidev_command, inc_use: NULL, dec_use: NULL, } spidev_driver struct to register us as a spi driver to spi-core

struct file_operations spidev_fops [static]

Initial value: { owner: THIS_MODULE, llseek: no_llseek, read: spidev_read, write: spidev_write, ioctl: spidev_ioctl, open: spidev_open, release: spidev_release, }

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