mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
37 lines
980 B
C
37 lines
980 B
C
/* $Id: etraxi2c.h,v 1.1 2001/01/18 15:49:57 bjornw Exp $ */
|
|
|
|
#ifndef _LINUX_ETRAXI2C_H
|
|
#define _LINUX_ETRAXI2C_H
|
|
|
|
/* etraxi2c _IOC_TYPE, bits 8 to 15 in ioctl cmd */
|
|
|
|
#define ETRAXI2C_IOCTYPE 44
|
|
|
|
/* supported ioctl _IOC_NR's */
|
|
|
|
/* in write operations, the argument contains both i2c
|
|
* slave, register and value.
|
|
*/
|
|
|
|
#define I2C_WRITEARG(slave, reg, value) (((slave) << 16) | ((reg) << 8) | (value))
|
|
#define I2C_READARG(slave, reg) (((slave) << 16) | ((reg) << 8))
|
|
|
|
#define I2C_ARGSLAVE(arg) ((arg) >> 16)
|
|
#define I2C_ARGREG(arg) (((arg) >> 8) & 0xff)
|
|
#define I2C_ARGVALUE(arg) ((arg) & 0xff)
|
|
|
|
#define I2C_WRITEREG 0x1 /* write to an i2c register */
|
|
#define I2C_READREG 0x2 /* read from an i2c register */
|
|
|
|
/*
|
|
EXAMPLE usage:
|
|
|
|
i2c_arg = I2C_WRITEARG(STA013_WRITE_ADDR, reg, val);
|
|
ioctl(fd, _IO(ETRAXI2C_IOCTYPE, I2C_WRITEREG), i2c_arg);
|
|
|
|
i2c_arg = I2C_READARG(STA013_READ_ADDR, reg);
|
|
val = ioctl(fd, _IO(ETRAXI2C_IOCTYPE, I2C_READREG), i2c_arg);
|
|
|
|
*/
|
|
#endif
|