pcf8591.c File Reference

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/hwmon.h>

Go to the source code of this file.

Data Structures
struct	pcf8591_data

Macros
#define	pr_fmt(fmt)   KBUILD_MODNAME ": " fmt
#define	PCF8591_CONTROL_AOEF   0x40
#define	PCF8591_CONTROL_AIP_MASK   0x30
#define	PCF8591_CONTROL_AINC   0x04
#define	PCF8591_CONTROL_AICH_MASK   0x03
#define	PCF8591_INIT_CONTROL   ((input_mode << 4) | PCF8591_CONTROL_AOEF)
#define	PCF8591_INIT_AOUT   0 /* DAC out = 0 */
#define	REG_TO_SIGNED(reg)   (((reg) & 0x80) ? ((reg) - 256) : (reg))
#define	show_in_channel(channel)

Functions
	module_param (input_mode, int, 0)
	MODULE_PARM_DESC (input_mode,"Analog input mode:\n"" 0 = four single ended inputs\n"" 1 = three differential inputs\n"" 2 = single ended and differential mixed\n"" 3 = two differential inputs\n")
	show_in_channel (0)
	show_in_channel (1)
	show_in_channel (2)
	show_in_channel (3)
	MODULE_DEVICE_TABLE (i2c, pcf8591_id)
	MODULE_AUTHOR ("Aurelien Jarno <[email protected]>")
	MODULE_DESCRIPTION ("PCF8591 driver")
	MODULE_LICENSE ("GPL")
	module_init (pcf8591_init)
	module_exit (pcf8591_exit)

Macro Definition Documentation

#define PCF8591_CONTROL_AICH_MASK   0x03

Definition at line 70 of file pcf8591.c.

#define PCF8591_CONTROL_AINC   0x04

Definition at line 61 of file pcf8591.c.

#define PCF8591_CONTROL_AIP_MASK   0x30

Definition at line 58 of file pcf8591.c.

#define PCF8591_CONTROL_AOEF   0x40

Definition at line 49 of file pcf8591.c.

#define PCF8591_INIT_AOUT   0 /* DAC out = 0 */

Definition at line 74 of file pcf8591.c.

#define PCF8591_INIT_CONTROL   ((input_mode << 4) | PCF8591_CONTROL_AOEF)

Definition at line 73 of file pcf8591.c.

#define pr_fmt

(

fmt

)

KBUILD_MODNAME ": " fmt

Definition at line 21 of file pcf8591.c.

#define REG_TO_SIGNED

(

reg

)

(((reg) & 0x80) ? ((reg) - 256) : (reg))

Definition at line 77 of file pcf8591.c.

#define show_in_channel

(

channel

)

Value:

static ssize_t show_in##channel##_input(struct device *dev,     \
                    struct device_attribute *attr,  \
                    char *buf)          \
{                                   \
    return sprintf(buf, "%d\n", pcf8591_read_channel(dev, channel));\
}                                   \
static DEVICE_ATTR(in##channel##_input, S_IRUGO,            \
           show_in##channel##_input, NULL);

Definition at line 91 of file pcf8591.c.

Function Documentation

MODULE_AUTHOR

(

"Aurelien Jarno <[email protected]>"

)

MODULE_DESCRIPTION

(

"PCF8591 driver"

)

MODULE_DEVICE_TABLE	(	i2c	,
		pcf8591_id
	)

module_exit

(

pcf8591_exit

)

module_init

(

pcf8591_init

)

MODULE_LICENSE

(

"GPL"

)

module_param	(	input_mode	,
		int	,
		0
	)

MODULE_PARM_DESC

(

input_mode

)

show_in_channel

(

0

)

show_in_channel

(

1

)

show_in_channel

(

2

)

show_in_channel

(

3

)