pcf8591.c File Reference

#include <sys/cdefs.h>
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <dev/iicbus/iicbus.h>
#include <dev/iicbus/iiconf.h>

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Data Structures
struct	pcf8591_softc

Macros
#define	CTRL_CH_SELECT_MASK   0x03
#define	CTRL_AUTOINC_EN   0x04
#define	CTRL_CH_CONFIG_MASK   0x30
#define	CTRL_CH_CONFIG_4_SINGLE   0x00
#define	CTRL_CH_CONFIG_3_DIFF   0x10
#define	CTRL_CH_CONFIG_2_SINGLE_1_DIFF   0x20
#define	CTRL_CH_CONFIG_2_DIFF   0x30
#define	CTRL_OUTPUT_EN   0x40

Functions
	__FBSDID ("$FreeBSD$")
static int	pcf8591_set_config (device_t dev)
static int	pcf8591_get_reading (device_t dev, uint8_t *reading)
static int	pcf8591_select_channel (device_t dev, int channel)
static int	pcf8591_channel_sysctl (SYSCTL_HANDLER_ARGS)
static void	pcf8591_start (void *arg)
static int	pcf8591_probe (device_t dev)
static int	pcf8591_attach (device_t dev)
static int	pcf8591_detach (device_t dev)
	DRIVER_MODULE (pcf8591, iicbus, pcf8591_driver, pcf8591_devclass, 0, 0)
	MODULE_DEPEND (pcf8591, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER)
	MODULE_VERSION (pcf8591, 1)

Variables
static device_method_t	pcf8591_methods []
static driver_t	pcf8591_driver
static devclass_t	pcf8591_devclass

Macro Definition Documentation

CTRL_AUTOINC_EN

#define CTRL_AUTOINC_EN   0x04

Definition at line 55 of file pcf8591.c.

CTRL_CH_CONFIG_2_DIFF

#define CTRL_CH_CONFIG_2_DIFF   0x30

Definition at line 60 of file pcf8591.c.

CTRL_CH_CONFIG_2_SINGLE_1_DIFF

#define CTRL_CH_CONFIG_2_SINGLE_1_DIFF   0x20

Definition at line 59 of file pcf8591.c.

CTRL_CH_CONFIG_3_DIFF

#define CTRL_CH_CONFIG_3_DIFF   0x10

Definition at line 58 of file pcf8591.c.

CTRL_CH_CONFIG_4_SINGLE

#define CTRL_CH_CONFIG_4_SINGLE   0x00

Definition at line 57 of file pcf8591.c.

CTRL_CH_CONFIG_MASK

#define CTRL_CH_CONFIG_MASK   0x30

Definition at line 56 of file pcf8591.c.

CTRL_CH_SELECT_MASK

#define CTRL_CH_SELECT_MASK   0x03

Definition at line 54 of file pcf8591.c.

CTRL_OUTPUT_EN

#define CTRL_OUTPUT_EN   0x40

Definition at line 61 of file pcf8591.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

DRIVER_MODULE()

DRIVER_MODULE	(	pcf8591	,
		iicbus	,
		pcf8591_driver	,
		pcf8591_devclass	,
		0	,
		0
	)

MODULE_DEPEND()

MODULE_DEPEND	(	pcf8591	,
		iicbus	,
		IICBUS_MINVER	,
		IICBUS_PREFVER	,
		IICBUS_MAXVER
	)

MODULE_VERSION()

MODULE_VERSION	(	pcf8591	,
		1
	)

pcf8591_attach()

static int pcf8591_attach ( device_t  dev )

static

Definition at line 224 of file pcf8591.c.

References dev, pcf8591_start(), pcf8591_softc::sc_addr, and pcf8591_softc::sc_dev.

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pcf8591_channel_sysctl()

static int pcf8591_channel_sysctl ( SYSCTL_HANDLER_ARGS  )

static

Definition at line 142 of file pcf8591.c.

References dev, pcf8591_get_reading(), pcf8591_select_channel(), and val.

Referenced by pcf8591_start().

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pcf8591_detach()

static int pcf8591_detach ( device_t  dev )

static

Definition at line 241 of file pcf8591.c.

pcf8591_get_reading()

static int pcf8591_get_reading ( device_t  dev, uint8_t *  reading  )

static

Definition at line 100 of file pcf8591.c.

References iic_msg::buf, dev, iic_msg::flags, IIC_INTRWAIT, IIC_M_RD, iicbus_transfer_excl(), iic_msg::len, pcf8591_softc::sc_addr, and iic_msg::slave.

Referenced by pcf8591_channel_sysctl(), and pcf8591_select_channel().

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pcf8591_probe()

static int pcf8591_probe ( device_t  dev )

static

Definition at line 209 of file pcf8591.c.

References compat_data, and dev.

pcf8591_select_channel()

static int pcf8591_select_channel ( device_t  dev, int  channel  )

static

Definition at line 118 of file pcf8591.c.

References dev, pcf8591_get_reading(), pcf8591_set_config(), pcf8591_softc::sc_cfg, and pcf8591_softc::sc_ch_count.

Referenced by pcf8591_channel_sysctl().

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pcf8591_set_config()

static int pcf8591_set_config ( device_t  dev )

static

Definition at line 79 of file pcf8591.c.

References iic_msg::buf, data, dev, iic_msg::flags, IIC_INTRWAIT, IIC_M_WR, iicbus_transfer_excl(), iic_msg::len, pcf8591_softc::sc_addr, pcf8591_softc::sc_cfg, pcf8591_softc::sc_output, and iic_msg::slave.

Referenced by pcf8591_select_channel(), and pcf8591_start().

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pcf8591_start()

static void pcf8591_start ( void *  arg )

static

Definition at line 165 of file pcf8591.c.

References buf, dev, pcf8591_channel_sysctl(), pcf8591_set_config(), pcf8591_softc::sc_cfg, pcf8591_softc::sc_ch_count, pcf8591_softc::sc_dev, and pcf8591_softc::sc_output.

Referenced by pcf8591_attach().

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Variable Documentation

pcf8591_devclass

devclass_t pcf8591_devclass

static

Definition at line 261 of file pcf8591.c.

pcf8591_driver

driver_t pcf8591_driver

static

Initial value:

= {
        "pcf8591",
        pcf8591_methods,
        sizeof(struct pcf8591_softc)
}

Definition at line 255 of file pcf8591.c.

pcf8591_methods

device_method_t pcf8591_methods[]

static

Initial value:

= {
        
        DEVMETHOD(device_probe,         pcf8591_probe),
        DEVMETHOD(device_attach,        pcf8591_attach),
        DEVMETHOD(device_detach,        pcf8591_detach),
 
        DEVMETHOD_END
}

Definition at line 246 of file pcf8591.c.