i2c-mux-pca9541.c File Reference

#include <linux/module.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/i2c/pca954x.h>

Go to the source code of this file.

Data Structures
struct	pca9541

Macros
#define	PCA9541_CONTROL   0x01
#define	PCA9541_ISTAT   0x02
#define	PCA9541_CTL_MYBUS   (1 << 0)
#define	PCA9541_CTL_NMYBUS   (1 << 1)
#define	PCA9541_CTL_BUSON   (1 << 2)
#define	PCA9541_CTL_NBUSON   (1 << 3)
#define	PCA9541_CTL_BUSINIT   (1 << 4)
#define	PCA9541_CTL_TESTON   (1 << 6)
#define	PCA9541_CTL_NTESTON   (1 << 7)
#define	PCA9541_ISTAT_INTIN   (1 << 0)
#define	PCA9541_ISTAT_BUSINIT   (1 << 1)
#define	PCA9541_ISTAT_BUSOK   (1 << 2)
#define	PCA9541_ISTAT_BUSLOST   (1 << 3)
#define	PCA9541_ISTAT_MYTEST   (1 << 6)
#define	PCA9541_ISTAT_NMYTEST   (1 << 7)
#define	BUSON   (PCA9541_CTL_BUSON | PCA9541_CTL_NBUSON)
#define	MYBUS   (PCA9541_CTL_MYBUS | PCA9541_CTL_NMYBUS)
#define	mybus(x)   (!((x) & MYBUS) || ((x) & MYBUS) == MYBUS)
#define	busoff(x)   (!((x) & BUSON) || ((x) & BUSON) == BUSON)
#define	ARB_TIMEOUT   (HZ / 8) /* 125 ms until forcing bus ownership */
#define	ARB2_TIMEOUT   (HZ / 4) /* 250 ms until acquisition failure */
#define	SELECT_DELAY_SHORT   50
#define	SELECT_DELAY_LONG   1000

Functions
	MODULE_DEVICE_TABLE (i2c, pca9541_id)
	module_i2c_driver (pca9541_driver)
	MODULE_AUTHOR ("Guenter Roeck <[email protected]>")
	MODULE_DESCRIPTION ("PCA9541 I2C master selector driver")
	MODULE_LICENSE ("GPL v2")

Macro Definition Documentation

#define ARB2_TIMEOUT   (HZ / 4) /* 250 ms until acquisition failure */

Definition at line 70 of file i2c-mux-pca9541.c.

#define ARB_TIMEOUT   (HZ / 8) /* 125 ms until forcing bus ownership */

Definition at line 69 of file i2c-mux-pca9541.c.

#define busoff

(

x

)

(!((x) & BUSON) || ((x) & BUSON) == BUSON)

Definition at line 66 of file i2c-mux-pca9541.c.

#define BUSON   (PCA9541_CTL_BUSON | PCA9541_CTL_NBUSON)

Definition at line 63 of file i2c-mux-pca9541.c.

#define MYBUS   (PCA9541_CTL_MYBUS | PCA9541_CTL_NMYBUS)

Definition at line 64 of file i2c-mux-pca9541.c.

#define mybus

(

x

)

(!((x) & MYBUS) || ((x) & MYBUS) == MYBUS)

Definition at line 65 of file i2c-mux-pca9541.c.

#define PCA9541_CONTROL   0x01

Definition at line 45 of file i2c-mux-pca9541.c.

#define PCA9541_CTL_BUSINIT   (1 << 4)

Definition at line 52 of file i2c-mux-pca9541.c.

#define PCA9541_CTL_BUSON   (1 << 2)

Definition at line 50 of file i2c-mux-pca9541.c.

#define PCA9541_CTL_MYBUS   (1 << 0)

Definition at line 48 of file i2c-mux-pca9541.c.

#define PCA9541_CTL_NBUSON   (1 << 3)

Definition at line 51 of file i2c-mux-pca9541.c.

#define PCA9541_CTL_NMYBUS   (1 << 1)

Definition at line 49 of file i2c-mux-pca9541.c.

#define PCA9541_CTL_NTESTON   (1 << 7)

Definition at line 54 of file i2c-mux-pca9541.c.

#define PCA9541_CTL_TESTON   (1 << 6)

Definition at line 53 of file i2c-mux-pca9541.c.

#define PCA9541_ISTAT   0x02

Definition at line 46 of file i2c-mux-pca9541.c.

#define PCA9541_ISTAT_BUSINIT   (1 << 1)

Definition at line 57 of file i2c-mux-pca9541.c.

#define PCA9541_ISTAT_BUSLOST   (1 << 3)

Definition at line 59 of file i2c-mux-pca9541.c.

#define PCA9541_ISTAT_BUSOK   (1 << 2)

Definition at line 58 of file i2c-mux-pca9541.c.

#define PCA9541_ISTAT_INTIN   (1 << 0)

Definition at line 56 of file i2c-mux-pca9541.c.

#define PCA9541_ISTAT_MYTEST   (1 << 6)

Definition at line 60 of file i2c-mux-pca9541.c.

#define PCA9541_ISTAT_NMYTEST   (1 << 7)

Definition at line 61 of file i2c-mux-pca9541.c.

#define SELECT_DELAY_LONG   1000

Definition at line 74 of file i2c-mux-pca9541.c.

#define SELECT_DELAY_SHORT   50

Definition at line 73 of file i2c-mux-pca9541.c.

Function Documentation

MODULE_AUTHOR

(

"Guenter Roeck <[email protected]>"

)

MODULE_DESCRIPTION

(

"PCA9541 I2C master selector driver"

)

MODULE_DEVICE_TABLE	(	i2c	,
		pca9541_id
	)

module_i2c_driver

(

pca9541_driver

)

MODULE_LICENSE

(

"GPL v2"

)