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/*
* AD5593R Digital < - > Analog converters driver
*
* Copyright 2015 - 2016 Analog Devices Inc .
* Author : Paul Cercueil < paul . cercueil @ analog . com >
*
* Licensed under the GPL - 2.
*/
# include "ad5592r-base.h"
# include <linux/bitops.h>
# include <linux/i2c.h>
# include <linux/module.h>
# include <linux/of.h>
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# include <linux/acpi.h>
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# define AD5593R_MODE_CONF (0 << 4)
# define AD5593R_MODE_DAC_WRITE (1 << 4)
# define AD5593R_MODE_ADC_READBACK (4 << 4)
# define AD5593R_MODE_DAC_READBACK (5 << 4)
# define AD5593R_MODE_GPIO_READBACK (6 << 4)
# define AD5593R_MODE_REG_READBACK (7 << 4)
static int ad5593r_write_dac ( struct ad5592r_state * st , unsigned chan , u16 value )
{
struct i2c_client * i2c = to_i2c_client ( st - > dev ) ;
return i2c_smbus_write_word_swapped ( i2c ,
AD5593R_MODE_DAC_WRITE | chan , value ) ;
}
static int ad5593r_read_adc ( struct ad5592r_state * st , unsigned chan , u16 * value )
{
struct i2c_client * i2c = to_i2c_client ( st - > dev ) ;
s32 val ;
val = i2c_smbus_write_word_swapped ( i2c ,
AD5593R_MODE_CONF | AD5592R_REG_ADC_SEQ , BIT ( chan ) ) ;
if ( val < 0 )
return ( int ) val ;
val = i2c_smbus_read_word_swapped ( i2c , AD5593R_MODE_ADC_READBACK ) ;
if ( val < 0 )
return ( int ) val ;
* value = ( u16 ) val ;
return 0 ;
}
static int ad5593r_reg_write ( struct ad5592r_state * st , u8 reg , u16 value )
{
struct i2c_client * i2c = to_i2c_client ( st - > dev ) ;
return i2c_smbus_write_word_swapped ( i2c ,
AD5593R_MODE_CONF | reg , value ) ;
}
static int ad5593r_reg_read ( struct ad5592r_state * st , u8 reg , u16 * value )
{
struct i2c_client * i2c = to_i2c_client ( st - > dev ) ;
s32 val ;
val = i2c_smbus_read_word_swapped ( i2c , AD5593R_MODE_REG_READBACK | reg ) ;
if ( val < 0 )
return ( int ) val ;
* value = ( u16 ) val ;
return 0 ;
}
static int ad5593r_gpio_read ( struct ad5592r_state * st , u8 * value )
{
struct i2c_client * i2c = to_i2c_client ( st - > dev ) ;
s32 val ;
val = i2c_smbus_read_word_swapped ( i2c , AD5593R_MODE_GPIO_READBACK ) ;
if ( val < 0 )
return ( int ) val ;
* value = ( u8 ) val ;
return 0 ;
}
static const struct ad5592r_rw_ops ad5593r_rw_ops = {
. write_dac = ad5593r_write_dac ,
. read_adc = ad5593r_read_adc ,
. reg_write = ad5593r_reg_write ,
. reg_read = ad5593r_reg_read ,
. gpio_read = ad5593r_gpio_read ,
} ;
static int ad5593r_i2c_probe ( struct i2c_client * i2c ,
const struct i2c_device_id * id )
{
return ad5592r_probe ( & i2c - > dev , id - > name , & ad5593r_rw_ops ) ;
}
static int ad5593r_i2c_remove ( struct i2c_client * i2c )
{
return ad5592r_remove ( & i2c - > dev ) ;
}
static const struct i2c_device_id ad5593r_i2c_ids [ ] = {
{ . name = " ad5593r " , } ,
{ } ,
} ;
MODULE_DEVICE_TABLE ( i2c , ad5593r_i2c_ids ) ;
static const struct of_device_id ad5593r_of_match [ ] = {
{ . compatible = " adi,ad5593r " , } ,
{ } ,
} ;
MODULE_DEVICE_TABLE ( of , ad5593r_of_match ) ;
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static const struct acpi_device_id ad5593r_acpi_match [ ] = {
{ " ADS5593 " , } ,
{ } ,
} ;
MODULE_DEVICE_TABLE ( acpi , ad5593r_acpi_match ) ;
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static struct i2c_driver ad5593r_driver = {
. driver = {
. name = " ad5593r " ,
. of_match_table = of_match_ptr ( ad5593r_of_match ) ,
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. acpi_match_table = ACPI_PTR ( ad5593r_acpi_match ) ,
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} ,
. probe = ad5593r_i2c_probe ,
. remove = ad5593r_i2c_remove ,
. id_table = ad5593r_i2c_ids ,
} ;
module_i2c_driver ( ad5593r_driver ) ;
MODULE_AUTHOR ( " Paul Cercueil <paul.cercueil@analog.com> " ) ;
MODULE_DESCRIPTION ( " Analog Devices AD5592R multi-channel converters " ) ;
MODULE_LICENSE ( " GPL v2 " ) ;