/*
* ADE7758 Poly Phase Multifunction Energy Metering IC driver
*
* Copyright 2010-2011 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/list.h>
#include "../iio.h"
#include "../sysfs.h"
#include "../ring_generic.h"
#include "meter.h"
#include "ade7758.h"
int ade7758_spi_write_reg_8(struct device *dev,
u8 reg_address,
u8 val)
{
int ret;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7758_state *st = iio_priv(indio_dev);
mutex_lock(&st->buf_lock);
st->tx[0] = ADE7758_WRITE_REG(reg_address);
st->tx[1] = val;
ret = spi_write(st->us, st->tx, 2);
mutex_unlock(&st->buf_lock);
return ret;
}
static int ade7758_spi_write_reg_16(struct device *dev,
u8 reg_address,
u16 value)
{
int ret;
struct spi_message msg;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7758_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[] = {
{
.tx_buf = st->tx,
.bits_per_word = 8,
.len = 3,
}
};
mutex_lock(&st->buf_lock);
st->tx[0] = ADE7758_WRITE_REG(reg_address);
st->tx[1] = (value >> 8) & 0xFF;
st->tx[2] = value & 0xFF;
spi_message_init(&msg);
spi_message_add_tail(xfers, &msg);
ret = spi_sync(st->us, &msg);
mutex_unlock(&st->buf_lock);
return ret;
}
static int ade7758_spi_write_reg_24(struct device *dev,
u8 reg_address,
u32 value)
{
int ret;
struct spi_message msg;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7758_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[] = {
{
.tx_buf = st->tx,
.bits_per_word = 8,
.len = 4,
}
};
mutex_lock(&st->buf_lock);
st->tx[0] = ADE7758_WRITE_REG(reg_address);
st->tx[1] = (value >> 16) & 0xFF;
st->tx[2] = (value >> 8) & 0xFF;
st->tx[3] = value & 0xFF;
spi_message_init(&msg);
spi_message_add_tail(xfers, &msg);
ret = spi_sync(st->us, &msg);
mutex_unlock(&st->buf_lock);
return ret;
}
int ade7758_spi_read_reg_8(struct device *dev,
u8 reg_address,
u8 *val)
{
struct spi_message msg;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7758_state *st = iio_priv(indio_dev);
int ret;
struct spi_transfer xfers[] = {
{
.tx_buf = st->tx,
.bits_per_word = 8,
.len = 1,
.delay_usecs = 4,
},
{
.tx_buf = &st->tx[1],
.rx_buf = st->rx,
.bits_per_word = 8,
.len = 1,
},
};
mutex_lock(&st->buf_lock);
st->tx[0] = ADE7758_READ_REG(reg_address);
st->tx[1] = 0;
spi_message_init(&msg);
spi_message_add_tail(&xfers[0], &msg);
spi_message_add_tail(&xfers[1], &msg);
ret = spi_sync(st->us, &msg);
if (ret) {
dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X",
reg_address);
goto error_ret;
}
*val = st->rx[0];
error_ret:
mutex_unlock(&st->buf_lock);
return ret;
}
static int ade7758_spi_read_reg_16(struct device *dev,
u8 reg_address,
u16 *val)
{
struct spi_message msg;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ade7758_state *st = iio_priv(indio_dev);
int ret;
struct spi_transfer xfers[] = {
{
.tx_buf = st->tx,
.bits_per_word = 8,