From: Barry Song <barry.song@xxxxxxxxxx> Signed-off-by: Barry Song <barry.song@xxxxxxxxxx> Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx> --- drivers/staging/iio/meter/Kconfig | 7 + drivers/staging/iio/meter/Makefile | 2 + drivers/staging/iio/meter/ade7759.c | 670 +++++++++++++++++++++++++++++++++++ drivers/staging/iio/meter/ade7759.h | 122 +++++++ 4 files changed, 801 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/iio/meter/ade7759.c create mode 100644 drivers/staging/iio/meter/ade7759.h diff --git a/drivers/staging/iio/meter/Kconfig b/drivers/staging/iio/meter/Kconfig index be88bb8..ebc253e 100644 --- a/drivers/staging/iio/meter/Kconfig +++ b/drivers/staging/iio/meter/Kconfig @@ -25,3 +25,10 @@ config ADE7758 help Say yes here to build support for Analog Devices ADE7758 Polyphase Multifunction Energy Metering IC with Per Phase Information Driver. + +config ADE7759 + tristate "Analog Devices ADE7759 Active Energy Metering IC Driver" + depends on SPI + help + Say yes here to build support for Analog Devices ADE7758 Active Energy + Metering IC with di/dt Sensor Interface. diff --git a/drivers/staging/iio/meter/Makefile b/drivers/staging/iio/meter/Makefile index 8e1a71d..85e3021 100644 --- a/drivers/staging/iio/meter/Makefile +++ b/drivers/staging/iio/meter/Makefile @@ -8,3 +8,5 @@ obj-$(CONFIG_ADE7754) += ade7754.o ade7758-y := ade7758_core.o ade7758-$(CONFIG_IIO_RING_BUFFER) += ade7758_ring.o ade7758_trigger.o obj-$(CONFIG_ADE7758) += ade7758.o + +obj-$(CONFIG_ADE7759) += ade7759.o diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c new file mode 100644 index 0000000..67d7b6b --- /dev/null +++ b/drivers/staging/iio/meter/ade7759.c @@ -0,0 +1,670 @@ +/* + * ADE7759 Active Energy Metering IC with di/dt Sensor Interface Driver + * + * Copyright 2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#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 "meter.h" +#include "ade7759.h" + +int ade7759_spi_write_reg_8(struct device *dev, + u8 reg_address, + u8 val) +{ + int ret; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7759_state *st = iio_dev_get_devdata(indio_dev); + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7759_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 ade7759_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 ade7759_state *st = iio_dev_get_devdata(indio_dev); + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .bits_per_word = 8, + .len = 3, + } + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7759_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 ade7759_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 ade7759_state *st = iio_dev_get_devdata(indio_dev); + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .rx_buf = st->rx, + .bits_per_word = 8, + .len = 2, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7759_READ_REG(reg_address); + st->tx[1] = 0; + + spi_message_init(&msg); + spi_message_add_tail(xfers, &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[1]; + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +static int ade7759_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 ade7759_state *st = iio_dev_get_devdata(indio_dev); + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .rx_buf = st->rx, + .bits_per_word = 8, + .len = 3, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7759_READ_REG(reg_address); + st->tx[1] = 0; + st->tx[2] = 0; + + spi_message_init(&msg); + spi_message_add_tail(xfers, &msg); + ret = spi_sync(st->us, &msg); + if (ret) { + dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X", + reg_address); + goto error_ret; + } + *val = (st->rx[1] << 8) | st->rx[2]; + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +static int ade7759_spi_read_reg_40(struct device *dev, + u8 reg_address, + u64 *val) +{ + struct spi_message msg; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7759_state *st = iio_dev_get_devdata(indio_dev); + int ret; + struct spi_transfer xfers[] = { + { + .tx_buf = st->tx, + .rx_buf = st->rx, + .bits_per_word = 8, + .len = 6, + }, + }; + + mutex_lock(&st->buf_lock); + st->tx[0] = ADE7759_READ_REG(reg_address); + memset(&st->tx[1], 0 , 5); + + spi_message_init(&msg); + spi_message_add_tail(xfers, &msg); + ret = spi_sync(st->us, &msg); + if (ret) { + dev_err(&st->us->dev, "problem when reading 40 bit register 0x%02X", + reg_address); + goto error_ret; + } + *val = ((u64)st->rx[1] << 32) | (st->rx[2] << 24) | + (st->rx[3] << 16) | (st->rx[4] << 8) | st->rx[5]; + +error_ret: + mutex_unlock(&st->buf_lock); + return ret; +} + +static ssize_t ade7759_read_8bit(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int ret; + u8 val = 0; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + + ret = ade7759_spi_read_reg_8(dev, this_attr->address, &val); + if (ret) + return ret; + + return sprintf(buf, "%u\n", val); +} + +static ssize_t ade7759_read_16bit(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int ret; + u16 val = 0; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + + ret = ade7759_spi_read_reg_16(dev, this_attr->address, &val); + if (ret) + return ret; + + return sprintf(buf, "%u\n", val); +} + +static ssize_t ade7759_read_40bit(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int ret; + u64 val = 0; + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + + ret = ade7759_spi_read_reg_40(dev, this_attr->address, &val); + if (ret) + return ret; + + return sprintf(buf, "%llu\n", val); +} + +static ssize_t ade7759_write_8bit(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + int ret; + long val; + + ret = strict_strtol(buf, 10, &val); + if (ret) + goto error_ret; + ret = ade7759_spi_write_reg_8(dev, this_attr->address, val); + +error_ret: + return ret ? ret : len; +} + +static ssize_t ade7759_write_16bit(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); + int ret; + long val; + + ret = strict_strtol(buf, 10, &val); + if (ret) + goto error_ret; + ret = ade7759_spi_write_reg_16(dev, this_attr->address, val); + +error_ret: + return ret ? ret : len; +} + +static int ade7759_reset(struct device *dev) +{ + int ret; + u16 val; + ade7759_spi_read_reg_16(dev, + ADE7759_MODE, + &val); + val |= 1 << 6; /* Software Chip Reset */ + ret = ade7759_spi_write_reg_16(dev, + ADE7759_MODE, + val); + + return ret; +} + +static ssize_t ade7759_write_reset(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + if (len < 1) + return -1; + switch (buf[0]) { + case '1': + case 'y': + case 'Y': + return ade7759_reset(dev); + } + return -1; +} + +static IIO_DEV_ATTR_AENERGY(ade7759_read_40bit, ADE7759_AENERGY); +static IIO_DEV_ATTR_CFDEN(S_IWUSR | S_IRUGO, + ade7759_read_16bit, + ade7759_write_16bit, + ADE7759_CFDEN); +static IIO_DEV_ATTR_CFNUM(S_IWUSR | S_IRUGO, + ade7759_read_8bit, + ade7759_write_8bit, + ADE7759_CFNUM); +static IIO_DEV_ATTR_CHKSUM(ade7759_read_8bit, ADE7759_CHKSUM); +static IIO_DEV_ATTR_PHCAL(S_IWUSR | S_IRUGO, + ade7759_read_16bit, + ade7759_write_16bit, + ADE7759_PHCAL); +static IIO_DEV_ATTR_APOS(S_IWUSR | S_IRUGO, + ade7759_read_16bit, + ade7759_write_16bit, + ADE7759_APOS); +static IIO_DEV_ATTR_SAGCYC(S_IWUSR | S_IRUGO, + ade7759_read_8bit, + ade7759_write_8bit, + ADE7759_SAGCYC); +static IIO_DEV_ATTR_SAGLVL(S_IWUSR | S_IRUGO, + ade7759_read_8bit, + ade7759_write_8bit, + ADE7759_SAGLVL); +static IIO_DEV_ATTR_LINECYC(S_IWUSR | S_IRUGO, + ade7759_read_8bit, + ade7759_write_8bit, + ADE7759_LINECYC); +static IIO_DEV_ATTR_LENERGY(ade7759_read_40bit, ADE7759_LENERGY); +static IIO_DEV_ATTR_PGA_GAIN(S_IWUSR | S_IRUGO, + ade7759_read_8bit, + ade7759_write_8bit, + ADE7759_GAIN); +static IIO_DEV_ATTR_ACTIVE_POWER_GAIN(S_IWUSR | S_IRUGO, + ade7759_read_16bit, + ade7759_write_16bit, + ADE7759_APGAIN); +static IIO_DEV_ATTR_CH_OFF(1, S_IWUSR | S_IRUGO, + ade7759_read_8bit, + ade7759_write_8bit, + ADE7759_CH1OS); +static IIO_DEV_ATTR_CH_OFF(2, S_IWUSR | S_IRUGO, + ade7759_read_8bit, + ade7759_write_8bit, + ADE7759_CH2OS); + +static int ade7759_set_irq(struct device *dev, bool enable) +{ + int ret; + u8 irqen; + ret = ade7759_spi_read_reg_8(dev, ADE7759_IRQEN, &irqen); + if (ret) + goto error_ret; + + if (enable) + irqen |= 1 << 3; /* Enables an interrupt when a data is + present in the waveform register */ + else + irqen &= ~(1 << 3); + + ret = ade7759_spi_write_reg_8(dev, ADE7759_IRQEN, irqen); + if (ret) + goto error_ret; + +error_ret: + return ret; +} + +/* Power down the device */ +int ade7759_stop_device(struct device *dev) +{ + int ret; + u16 val; + ade7759_spi_read_reg_16(dev, + ADE7759_MODE, + &val); + val |= 1 << 4; /* AD converters can be turned off */ + ret = ade7759_spi_write_reg_16(dev, + ADE7759_MODE, + val); + + return ret; +} + +static int ade7759_initial_setup(struct ade7759_state *st) +{ + int ret; + struct device *dev = &st->indio_dev->dev; + + /* use low spi speed for init */ + st->us->mode = SPI_MODE_3; + spi_setup(st->us); + + /* Disable IRQ */ + ret = ade7759_set_irq(dev, false); + if (ret) { + dev_err(dev, "disable irq failed"); + goto err_ret; + } + + ade7759_reset(dev); + msleep(ADE7759_STARTUP_DELAY); + +err_ret: + return ret; +} + +static ssize_t ade7759_read_frequency(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int ret, len = 0; + u16 t; + int sps; + ret = ade7759_spi_read_reg_16(dev, + ADE7759_MODE, + &t); + if (ret) + return ret; + + t = (t >> 3) & 0x3; + sps = 27900 / (1 + t); + + len = sprintf(buf, "%d SPS\n", sps); + return len; +} + +static ssize_t ade7759_write_frequency(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct ade7759_state *st = iio_dev_get_devdata(indio_dev); + unsigned long val; + int ret; + u16 reg, t; + + ret = strict_strtol(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&indio_dev->mlock); + + t = (27900 / val); + if (t > 0) + t--; + + if (t > 1) + st->us->max_speed_hz = ADE7759_SPI_SLOW; + else + st->us->max_speed_hz = ADE7759_SPI_FAST; + + ret = ade7759_spi_read_reg_16(dev, + ADE7759_MODE, + ®); + if (ret) + goto out; + + reg &= ~(3 << 13); + reg |= t << 13; + + ret = ade7759_spi_write_reg_16(dev, + ADE7759_MODE, + reg); + +out: + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} +static IIO_DEV_ATTR_TEMP(ade7759_read_8bit); +static IIO_CONST_ATTR(temp_offset, "70 C"); +static IIO_CONST_ATTR(temp_scale, "1 C"); + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + ade7759_read_frequency, + ade7759_write_frequency); + +static IIO_DEV_ATTR_RESET(ade7759_write_reset); + +static IIO_CONST_ATTR_AVAIL_SAMP_FREQ("27900 14000 7000 3500"); + +static IIO_CONST_ATTR(name, "ade7759"); + +static struct attribute *ade7759_event_attributes[] = { + NULL +}; + +static struct attribute_group ade7759_event_attribute_group = { + .attrs = ade7759_event_attributes, +}; + +static struct attribute *ade7759_attributes[] = { + &iio_dev_attr_temp.dev_attr.attr, + &iio_const_attr_temp_offset.dev_attr.attr, + &iio_const_attr_temp_scale.dev_attr.attr, + &iio_dev_attr_sampling_frequency.dev_attr.attr, + &iio_const_attr_available_sampling_frequency.dev_attr.attr, + &iio_dev_attr_reset.dev_attr.attr, + &iio_const_attr_name.dev_attr.attr, + &iio_dev_attr_phcal.dev_attr.attr, + &iio_dev_attr_cfden.dev_attr.attr, + &iio_dev_attr_aenergy.dev_attr.attr, + &iio_dev_attr_cfnum.dev_attr.attr, + &iio_dev_attr_apos.dev_attr.attr, + &iio_dev_attr_sagcyc.dev_attr.attr, + &iio_dev_attr_saglvl.dev_attr.attr, + &iio_dev_attr_linecyc.dev_attr.attr, + &iio_dev_attr_lenergy.dev_attr.attr, + &iio_dev_attr_chksum.dev_attr.attr, + &iio_dev_attr_pga_gain.dev_attr.attr, + &iio_dev_attr_active_power_gain.dev_attr.attr, + &iio_dev_attr_choff_1.dev_attr.attr, + &iio_dev_attr_choff_2.dev_attr.attr, + NULL, +}; + +static const struct attribute_group ade7759_attribute_group = { + .attrs = ade7759_attributes, +}; + +static int __devinit ade7759_probe(struct spi_device *spi) +{ + int ret, regdone = 0; + struct ade7759_state *st = kzalloc(sizeof *st, GFP_KERNEL); + if (!st) { + ret = -ENOMEM; + goto error_ret; + } + /* this is only used for removal purposes */ + spi_set_drvdata(spi, st); + + /* Allocate the comms buffers */ + st->rx = kzalloc(sizeof(*st->rx)*ADE7759_MAX_RX, GFP_KERNEL); + if (st->rx == NULL) { + ret = -ENOMEM; + goto error_free_st; + } + st->tx = kzalloc(sizeof(*st->tx)*ADE7759_MAX_TX, GFP_KERNEL); + if (st->tx == NULL) { + ret = -ENOMEM; + goto error_free_rx; + } + st->us = spi; + mutex_init(&st->buf_lock); + /* setup the industrialio driver allocated elements */ + st->indio_dev = iio_allocate_device(); + if (st->indio_dev == NULL) { + ret = -ENOMEM; + goto error_free_tx; + } + + st->indio_dev->dev.parent = &spi->dev; + st->indio_dev->num_interrupt_lines = 1; + st->indio_dev->event_attrs = &ade7759_event_attribute_group; + st->indio_dev->attrs = &ade7759_attribute_group; + st->indio_dev->dev_data = (void *)(st); + st->indio_dev->driver_module = THIS_MODULE; + st->indio_dev->modes = INDIO_DIRECT_MODE; + + ret = ade7759_configure_ring(st->indio_dev); + if (ret) + goto error_free_dev; + + ret = iio_device_register(st->indio_dev); + if (ret) + goto error_unreg_ring_funcs; + regdone = 1; + + ret = ade7759_initialize_ring(st->indio_dev->ring); + if (ret) { + printk(KERN_ERR "failed to initialize the ring\n"); + goto error_unreg_ring_funcs; + } + + if (spi->irq) { + ret = iio_register_interrupt_line(spi->irq, + st->indio_dev, + 0, + IRQF_TRIGGER_FALLING, + "ade7759"); + if (ret) + goto error_uninitialize_ring; + + ret = ade7759_probe_trigger(st->indio_dev); + if (ret) + goto error_unregister_line; + } + + /* Get the device into a sane initial state */ + ret = ade7759_initial_setup(st); + if (ret) + goto error_remove_trigger; + return 0; + +error_remove_trigger: + if (st->indio_dev->modes & INDIO_RING_TRIGGERED) + ade7759_remove_trigger(st->indio_dev); +error_unregister_line: + if (st->indio_dev->modes & INDIO_RING_TRIGGERED) + iio_unregister_interrupt_line(st->indio_dev, 0); +error_uninitialize_ring: + ade7759_uninitialize_ring(st->indio_dev->ring); +error_unreg_ring_funcs: + ade7759_unconfigure_ring(st->indio_dev); +error_free_dev: + if (regdone) + iio_device_unregister(st->indio_dev); + else + iio_free_device(st->indio_dev); +error_free_tx: + kfree(st->tx); +error_free_rx: + kfree(st->rx); +error_free_st: + kfree(st); +error_ret: + return ret; +} + +/* fixme, confirm ordering in this function */ +static int ade7759_remove(struct spi_device *spi) +{ + int ret; + struct ade7759_state *st = spi_get_drvdata(spi); + struct iio_dev *indio_dev = st->indio_dev; + + ret = ade7759_stop_device(&(indio_dev->dev)); + if (ret) + goto err_ret; + + flush_scheduled_work(); + + ade7759_remove_trigger(indio_dev); + if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) + iio_unregister_interrupt_line(indio_dev, 0); + + ade7759_uninitialize_ring(indio_dev->ring); + ade7759_unconfigure_ring(indio_dev); + iio_device_unregister(indio_dev); + kfree(st->tx); + kfree(st->rx); + kfree(st); + + return 0; + +err_ret: + return ret; +} + +static struct spi_driver ade7759_driver = { + .driver = { + .name = "ade7759", + .owner = THIS_MODULE, + }, + .probe = ade7759_probe, + .remove = __devexit_p(ade7759_remove), +}; + +static __init int ade7759_init(void) +{ + return spi_register_driver(&ade7759_driver); +} +module_init(ade7759_init); + +static __exit void ade7759_exit(void) +{ + spi_unregister_driver(&ade7759_driver); +} +module_exit(ade7759_exit); + +MODULE_AUTHOR("Barry Song <21cnbao@xxxxxxxxx>"); +MODULE_DESCRIPTION("Analog Devices ADE7759 Active Energy Metering IC Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/meter/ade7759.h b/drivers/staging/iio/meter/ade7759.h new file mode 100644 index 0000000..68b0cc1 --- /dev/null +++ b/drivers/staging/iio/meter/ade7759.h @@ -0,0 +1,122 @@ +#ifndef _ADE7759_H +#define _ADE7759_H + +#define ADE7759_WAVEFORM 0x01 +#define ADE7759_AENERGY 0x02 +#define ADE7759_RSTENERGY 0x03 +#define ADE7759_STATUS 0x04 +#define ADE7759_RSTSTATUS 0x05 +#define ADE7759_MODE 0x06 +#define ADE7759_CFDEN 0x07 +#define ADE7759_CH1OS 0x08 +#define ADE7759_CH2OS 0x09 +#define ADE7759_GAIN 0x0A +#define ADE7759_APGAIN 0x0B +#define ADE7759_PHCAL 0x0C +#define ADE7759_APOS 0x0D +#define ADE7759_ZXTOUT 0x0E +#define ADE7759_SAGCYC 0x0F +#define ADE7759_IRQEN 0x10 +#define ADE7759_SAGLVL 0x11 +#define ADE7759_TEMP 0x12 +#define ADE7759_LINECYC 0x13 +#define ADE7759_LENERGY 0x14 +#define ADE7759_CFNUM 0x15 +#define ADE7759_CHKSUM 0x1E +#define ADE7759_DIEREV 0x1F + +#define ADE7759_READ_REG(a) a +#define ADE7759_WRITE_REG(a) ((a) | 0x80) + +#define ADE7759_MAX_TX 6 +#define ADE7759_MAX_RX 6 +#define ADE7759_STARTUP_DELAY 1 + +#define ADE7759_SPI_SLOW (u32)(300 * 1000) +#define ADE7759_SPI_BURST (u32)(1000 * 1000) +#define ADE7759_SPI_FAST (u32)(2000 * 1000) + +#define DRIVER_NAME "ade7759" + +/** + * struct ade7759_state - device instance specific data + * @us: actual spi_device + * @work_trigger_to_ring: bh for triggered event handling + * @inter: used to check if new interrupt has been triggered + * @last_timestamp: passing timestamp from th to bh of interrupt handler + * @indio_dev: industrial I/O device structure + * @trig: data ready trigger registered with iio + * @tx: transmit buffer + * @rx: recieve buffer + * @buf_lock: mutex to protect tx and rx + **/ +struct ade7759_state { + struct spi_device *us; + struct work_struct work_trigger_to_ring; + s64 last_timestamp; + struct iio_dev *indio_dev; + struct iio_trigger *trig; + u8 *tx; + u8 *rx; + struct mutex buf_lock; +}; +#ifdef CONFIG_IIO_RING_BUFFER +/* At the moment triggers are only used for ring buffer + * filling. This may change! + */ + +enum ade7759_scan { + ADE7759_SCAN_ACTIVE_POWER, + ADE7759_SCAN_CH1_CH2, + ADE7759_SCAN_CH1, + ADE7759_SCAN_CH2, +}; + +void ade7759_remove_trigger(struct iio_dev *indio_dev); +int ade7759_probe_trigger(struct iio_dev *indio_dev); + +ssize_t ade7759_read_data_from_ring(struct device *dev, + struct device_attribute *attr, + char *buf); + + +int ade7759_configure_ring(struct iio_dev *indio_dev); +void ade7759_unconfigure_ring(struct iio_dev *indio_dev); + +int ade7759_initialize_ring(struct iio_ring_buffer *ring); +void ade7759_uninitialize_ring(struct iio_ring_buffer *ring); +#else /* CONFIG_IIO_RING_BUFFER */ + +static inline void ade7759_remove_trigger(struct iio_dev *indio_dev) +{ +} +static inline int ade7759_probe_trigger(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline ssize_t +ade7759_read_data_from_ring(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return 0; +} + +static int ade7759_configure_ring(struct iio_dev *indio_dev) +{ + return 0; +} +static inline void ade7759_unconfigure_ring(struct iio_dev *indio_dev) +{ +} +static inline int ade7759_initialize_ring(struct iio_ring_buffer *ring) +{ + return 0; +} +static inline void ade7759_uninitialize_ring(struct iio_ring_buffer *ring) +{ +} +#endif /* CONFIG_IIO_RING_BUFFER */ + +#endif -- 1.7.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html