| /* |
| * ADE7758 Polyphase Multifunction Energy Metering IC 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 "ade7758.h" |
| |
| static 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_dev_get_devdata(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_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] = 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_dev_get_devdata(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_dev_get_devdata(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_dev_get_devdata(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 = 2, |
| }, |
| }; |
| |
| |
| mutex_lock(&st->buf_lock); |
| st->tx[0] = ADE7758_READ_REG(reg_address); |
| st->tx[1] = 0; |
| st->tx[2] = 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 16 bit register 0x%02X", |
| reg_address); |
| goto error_ret; |
| } |
| |
| *val = (st->rx[0] << 8) | st->rx[1]; |
| |
| error_ret: |
| mutex_unlock(&st->buf_lock); |
| return ret; |
| } |
| |
| static int ade7758_spi_read_reg_24(struct device *dev, |
| u8 reg_address, |
| u32 *val) |
| { |
| struct spi_message msg; |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| struct ade7758_state *st = iio_dev_get_devdata(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 = 3, |
| }, |
| }; |
| |
| mutex_lock(&st->buf_lock); |
| st->tx[0] = ADE7758_READ_REG(reg_address); |
| st->tx[1] = 0; |
| st->tx[2] = 0; |
| st->tx[3] = 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 24 bit register 0x%02X", |
| reg_address); |
| goto error_ret; |
| } |
| *val = (st->rx[0] << 16) | (st->rx[1] << 8) | st->rx[2]; |
| |
| error_ret: |
| mutex_unlock(&st->buf_lock); |
| return ret; |
| } |
| |
| static ssize_t ade7758_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 = ade7758_spi_read_reg_8(dev, this_attr->address, &val); |
| if (ret) |
| return ret; |
| |
| return sprintf(buf, "%u\n", val); |
| } |
| |
| static ssize_t ade7758_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 = ade7758_spi_read_reg_16(dev, this_attr->address, &val); |
| if (ret) |
| return ret; |
| |
| return sprintf(buf, "%u\n", val); |
| } |
| |
| static ssize_t ade7758_read_24bit(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| int ret; |
| u32 val = 0; |
| struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| |
| ret = ade7758_spi_read_reg_24(dev, this_attr->address, &val); |
| if (ret) |
| return ret; |
| |
| return sprintf(buf, "%u\n", val & 0xFFFFFF); |
| } |
| |
| static ssize_t ade7758_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 = ade7758_spi_write_reg_8(dev, this_attr->address, val); |
| |
| error_ret: |
| return ret ? ret : len; |
| } |
| |
| static ssize_t ade7758_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 = ade7758_spi_write_reg_16(dev, this_attr->address, val); |
| |
| error_ret: |
| return ret ? ret : len; |
| } |
| |
| static int ade7758_reset(struct device *dev) |
| { |
| int ret; |
| u8 val; |
| ade7758_spi_read_reg_8(dev, |
| ADE7758_OPMODE, |
| &val); |
| val |= 1 << 6; /* Software Chip Reset */ |
| ret = ade7758_spi_write_reg_8(dev, |
| ADE7758_OPMODE, |
| val); |
| |
| return ret; |
| } |
| |
| static ssize_t ade7758_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 ade7758_reset(dev); |
| } |
| return -1; |
| } |
| |
| static IIO_DEV_ATTR_VPEAK(S_IWUSR | S_IRUGO, |
| ade7758_read_8bit, |
| ade7758_write_8bit, |
| ADE7758_VPEAK); |
| static IIO_DEV_ATTR_IPEAK(S_IWUSR | S_IRUGO, |
| ade7758_read_8bit, |
| ade7758_write_8bit, |
| ADE7758_VPEAK); |
| static IIO_DEV_ATTR_APHCAL(S_IWUSR | S_IRUGO, |
| ade7758_read_8bit, |
| ade7758_write_8bit, |
| ADE7758_APHCAL); |
| static IIO_DEV_ATTR_BPHCAL(S_IWUSR | S_IRUGO, |
| ade7758_read_8bit, |
| ade7758_write_8bit, |
| ADE7758_BPHCAL); |
| static IIO_DEV_ATTR_CPHCAL(S_IWUSR | S_IRUGO, |
| ade7758_read_8bit, |
| ade7758_write_8bit, |
| ADE7758_CPHCAL); |
| static IIO_DEV_ATTR_WDIV(S_IWUSR | S_IRUGO, |
| ade7758_read_8bit, |
| ade7758_write_8bit, |
| ADE7758_WDIV); |
| static IIO_DEV_ATTR_VADIV(S_IWUSR | S_IRUGO, |
| ade7758_read_8bit, |
| ade7758_write_8bit, |
| ADE7758_VADIV); |
| static IIO_DEV_ATTR_AIRMS(S_IRUGO, |
| ade7758_read_24bit, |
| NULL, |
| ADE7758_AIRMS); |
| static IIO_DEV_ATTR_BIRMS(S_IRUGO, |
| ade7758_read_24bit, |
| NULL, |
| ADE7758_BIRMS); |
| static IIO_DEV_ATTR_CIRMS(S_IRUGO, |
| ade7758_read_24bit, |
| NULL, |
| ADE7758_CIRMS); |
| static IIO_DEV_ATTR_AVRMS(S_IRUGO, |
| ade7758_read_24bit, |
| NULL, |
| ADE7758_AVRMS); |
| static IIO_DEV_ATTR_BVRMS(S_IRUGO, |
| ade7758_read_24bit, |
| NULL, |
| ADE7758_BVRMS); |
| static IIO_DEV_ATTR_CVRMS(S_IRUGO, |
| ade7758_read_24bit, |
| NULL, |
| ADE7758_CVRMS); |
| static IIO_DEV_ATTR_AIRMSOS(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_AIRMSOS); |
| static IIO_DEV_ATTR_BIRMSOS(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_BIRMSOS); |
| static IIO_DEV_ATTR_CIRMSOS(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_CIRMSOS); |
| static IIO_DEV_ATTR_AVRMSOS(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_AVRMSOS); |
| static IIO_DEV_ATTR_BVRMSOS(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_BVRMSOS); |
| static IIO_DEV_ATTR_CVRMSOS(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_CVRMSOS); |
| static IIO_DEV_ATTR_AIGAIN(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_AIGAIN); |
| static IIO_DEV_ATTR_BIGAIN(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_BIGAIN); |
| static IIO_DEV_ATTR_CIGAIN(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_CIGAIN); |
| static IIO_DEV_ATTR_AVRMSGAIN(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_AVRMSGAIN); |
| static IIO_DEV_ATTR_BVRMSGAIN(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_BVRMSGAIN); |
| static IIO_DEV_ATTR_CVRMSGAIN(S_IWUSR | S_IRUGO, |
| ade7758_read_16bit, |
| ade7758_write_16bit, |
| ADE7758_CVRMSGAIN); |
| |
| int ade7758_set_irq(struct device *dev, bool enable) |
| { |
| int ret; |
| u32 irqen; |
| ret = ade7758_spi_read_reg_24(dev, ADE7758_MASK, &irqen); |
| if (ret) |
| goto error_ret; |
| |
| if (enable) |
| irqen |= 1 << 16; /* Enables an interrupt when a data is |
| present in the waveform register */ |
| else |
| irqen &= ~(1 << 16); |
| |
| ret = ade7758_spi_write_reg_24(dev, ADE7758_MASK, irqen); |
| if (ret) |
| goto error_ret; |
| |
| error_ret: |
| return ret; |
| } |
| |
| /* Power down the device */ |
| static int ade7758_stop_device(struct device *dev) |
| { |
| int ret; |
| u8 val; |
| ade7758_spi_read_reg_8(dev, |
| ADE7758_OPMODE, |
| &val); |
| val |= 7 << 3; /* ADE7758 powered down */ |
| ret = ade7758_spi_write_reg_8(dev, |
| ADE7758_OPMODE, |
| val); |
| |
| return ret; |
| } |
| |
| static int ade7758_initial_setup(struct ade7758_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 = ade7758_set_irq(dev, false); |
| if (ret) { |
| dev_err(dev, "disable irq failed"); |
| goto err_ret; |
| } |
| |
| ade7758_reset(dev); |
| msleep(ADE7758_STARTUP_DELAY); |
| |
| err_ret: |
| return ret; |
| } |
| |
| static ssize_t ade7758_read_frequency(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| int ret, len = 0; |
| u8 t; |
| int sps; |
| ret = ade7758_spi_read_reg_8(dev, |
| ADE7758_WAVMODE, |
| &t); |
| if (ret) |
| return ret; |
| |
| t = (t >> 5) & 0x3; |
| sps = 26040 / (1 << t); |
| |
| len = sprintf(buf, "%d SPS\n", sps); |
| return len; |
| } |
| |
| static ssize_t ade7758_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 ade7758_state *st = iio_dev_get_devdata(indio_dev); |
| unsigned long val; |
| int ret; |
| u8 reg, t; |
| |
| ret = strict_strtol(buf, 10, &val); |
| if (ret) |
| return ret; |
| |
| mutex_lock(&indio_dev->mlock); |
| |
| t = (26040 / val); |
| if (t > 0) |
| t >>= 1; |
| |
| if (t > 1) |
| st->us->max_speed_hz = ADE7758_SPI_SLOW; |
| else |
| st->us->max_speed_hz = ADE7758_SPI_FAST; |
| |
| ret = ade7758_spi_read_reg_8(dev, |
| ADE7758_WAVMODE, |
| ®); |
| if (ret) |
| goto out; |
| |
| reg &= ~(5 << 3); |
| reg |= t << 5; |
| |
| ret = ade7758_spi_write_reg_8(dev, |
| ADE7758_WAVMODE, |
| reg); |
| |
| out: |
| mutex_unlock(&indio_dev->mlock); |
| |
| return ret ? ret : len; |
| } |
| |
| static ssize_t ade7758_read_waveform_type(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| int ret, len = 0; |
| u8 t; |
| ret = ade7758_spi_read_reg_8(dev, |
| ADE7758_WAVMODE, |
| &t); |
| if (ret) |
| return ret; |
| |
| t = (t >> 2) & 0x7; |
| |
| len = sprintf(buf, "%d\n", t); |
| |
| return len; |
| } |
| |
| static ssize_t ade7758_write_waveform_type(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, |
| size_t len) |
| { |
| struct iio_dev *indio_dev = dev_get_drvdata(dev); |
| unsigned long val; |
| int ret; |
| u8 reg; |
| |
| ret = strict_strtol(buf, 10, &val); |
| if (ret) |
| return ret; |
| |
| if (val > 4) |
| return -EINVAL; |
| |
| mutex_lock(&indio_dev->mlock); |
| |
| ret = ade7758_spi_read_reg_8(dev, |
| ADE7758_WAVMODE, |
| ®); |
| if (ret) |
| goto out; |
| |
| reg &= ~(7 << 2); |
| reg |= val << 2; |
| |
| ret = ade7758_spi_write_reg_8(dev, |
| ADE7758_WAVMODE, |
| reg); |
| |
| out: |
| mutex_unlock(&indio_dev->mlock); |
| |
| return ret ? ret : len; |
| } |
| |
| static IIO_DEV_ATTR_TEMP_RAW(ade7758_read_8bit); |
| static IIO_CONST_ATTR(temp_offset, "129 C"); |
| static IIO_CONST_ATTR(temp_scale, "4 C"); |
| |
| static IIO_DEV_ATTR_AWATTHR(ade7758_read_16bit, |
| ADE7758_AWATTHR); |
| static IIO_DEV_ATTR_BWATTHR(ade7758_read_16bit, |
| ADE7758_BWATTHR); |
| static IIO_DEV_ATTR_CWATTHR(ade7758_read_16bit, |
| ADE7758_CWATTHR); |
| static IIO_DEV_ATTR_AVARHR(ade7758_read_16bit, |
| ADE7758_AVARHR); |
| static IIO_DEV_ATTR_BVARHR(ade7758_read_16bit, |
| ADE7758_BVARHR); |
| static IIO_DEV_ATTR_CVARHR(ade7758_read_16bit, |
| ADE7758_CVARHR); |
| static IIO_DEV_ATTR_AVAHR(ade7758_read_16bit, |
| ADE7758_AVAHR); |
| static IIO_DEV_ATTR_BVAHR(ade7758_read_16bit, |
| ADE7758_BVAHR); |
| static IIO_DEV_ATTR_CVAHR(ade7758_read_16bit, |
| ADE7758_CVAHR); |
| |
| static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, |
| ade7758_read_frequency, |
| ade7758_write_frequency); |
| |
| /** |
| * IIO_DEV_ATTR_WAVEFORM_TYPE - set the type of waveform. |
| * @_mode: sysfs file mode/permissions |
| * @_show: output method for the attribute |
| * @_store: input method for the attribute |
| **/ |
| #define IIO_DEV_ATTR_WAVEFORM_TYPE(_mode, _show, _store) \ |
| IIO_DEVICE_ATTR(waveform_type, _mode, _show, _store, 0) |
| |
| static IIO_DEV_ATTR_WAVEFORM_TYPE(S_IWUSR | S_IRUGO, |
| ade7758_read_waveform_type, |
| ade7758_write_waveform_type); |
| |
| static IIO_DEV_ATTR_RESET(ade7758_write_reset); |
| |
| static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26000 13000 65000 33000"); |
| |
| static struct attribute *ade7758_attributes[] = { |
| &iio_dev_attr_temp_raw.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_dev_attr_waveform_type.dev_attr.attr, |
| &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
| &iio_dev_attr_reset.dev_attr.attr, |
| &iio_dev_attr_awatthr.dev_attr.attr, |
| &iio_dev_attr_bwatthr.dev_attr.attr, |
| &iio_dev_attr_cwatthr.dev_attr.attr, |
| &iio_dev_attr_avarhr.dev_attr.attr, |
| &iio_dev_attr_bvarhr.dev_attr.attr, |
| &iio_dev_attr_cvarhr.dev_attr.attr, |
| &iio_dev_attr_avahr.dev_attr.attr, |
| &iio_dev_attr_bvahr.dev_attr.attr, |
| &iio_dev_attr_cvahr.dev_attr.attr, |
| &iio_dev_attr_vpeak.dev_attr.attr, |
| &iio_dev_attr_ipeak.dev_attr.attr, |
| &iio_dev_attr_aphcal.dev_attr.attr, |
| &iio_dev_attr_bphcal.dev_attr.attr, |
| &iio_dev_attr_cphcal.dev_attr.attr, |
| &iio_dev_attr_wdiv.dev_attr.attr, |
| &iio_dev_attr_vadiv.dev_attr.attr, |
| &iio_dev_attr_airms.dev_attr.attr, |
| &iio_dev_attr_birms.dev_attr.attr, |
| &iio_dev_attr_cirms.dev_attr.attr, |
| &iio_dev_attr_avrms.dev_attr.attr, |
| &iio_dev_attr_bvrms.dev_attr.attr, |
| &iio_dev_attr_cvrms.dev_attr.attr, |
| &iio_dev_attr_aigain.dev_attr.attr, |
| &iio_dev_attr_bigain.dev_attr.attr, |
| &iio_dev_attr_cigain.dev_attr.attr, |
| &iio_dev_attr_avrmsgain.dev_attr.attr, |
| &iio_dev_attr_bvrmsgain.dev_attr.attr, |
| &iio_dev_attr_cvrmsgain.dev_attr.attr, |
| &iio_dev_attr_airmsos.dev_attr.attr, |
| &iio_dev_attr_birmsos.dev_attr.attr, |
| &iio_dev_attr_cirmsos.dev_attr.attr, |
| &iio_dev_attr_avrmsos.dev_attr.attr, |
| &iio_dev_attr_bvrmsos.dev_attr.attr, |
| &iio_dev_attr_cvrmsos.dev_attr.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group ade7758_attribute_group = { |
| .attrs = ade7758_attributes, |
| }; |
| |
| |
| |
| static int __devinit ade7758_probe(struct spi_device *spi) |
| { |
| int ret, regdone = 0; |
| struct ade7758_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)*ADE7758_MAX_RX, GFP_KERNEL); |
| if (st->rx == NULL) { |
| ret = -ENOMEM; |
| goto error_free_st; |
| } |
| st->tx = kzalloc(sizeof(*st->tx)*ADE7758_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(0); |
| if (st->indio_dev == NULL) { |
| ret = -ENOMEM; |
| goto error_free_tx; |
| } |
| |
| st->indio_dev->name = spi->dev.driver->name; |
| st->indio_dev->dev.parent = &spi->dev; |
| st->indio_dev->attrs = &ade7758_attribute_group; |
| st->indio_dev->dev_data = (void *)(st); |
| st->indio_dev->driver_module = THIS_MODULE; |
| st->indio_dev->modes = INDIO_DIRECT_MODE; |
| |
| ret = ade7758_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 = ade7758_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 = ade7758_probe_trigger(st->indio_dev); |
| if (ret) |
| goto error_uninitialize_ring; |
| } |
| |
| /* Get the device into a sane initial state */ |
| ret = ade7758_initial_setup(st); |
| if (ret) |
| goto error_remove_trigger; |
| return 0; |
| |
| error_remove_trigger: |
| if (st->indio_dev->modes & INDIO_RING_TRIGGERED) |
| ade7758_remove_trigger(st->indio_dev); |
| error_uninitialize_ring: |
| ade7758_uninitialize_ring(st->indio_dev->ring); |
| error_unreg_ring_funcs: |
| ade7758_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; |
| } |
| |
| static int ade7758_remove(struct spi_device *spi) |
| { |
| int ret; |
| struct ade7758_state *st = spi_get_drvdata(spi); |
| struct iio_dev *indio_dev = st->indio_dev; |
| |
| ret = ade7758_stop_device(&(indio_dev->dev)); |
| if (ret) |
| goto err_ret; |
| |
| flush_scheduled_work(); |
| |
| ade7758_remove_trigger(indio_dev); |
| ade7758_uninitialize_ring(indio_dev->ring); |
| iio_device_unregister(indio_dev); |
| ade7758_unconfigure_ring(indio_dev); |
| kfree(st->tx); |
| kfree(st->rx); |
| kfree(st); |
| |
| return 0; |
| |
| err_ret: |
| return ret; |
| } |
| |
| static struct spi_driver ade7758_driver = { |
| .driver = { |
| .name = "ade7758", |
| .owner = THIS_MODULE, |
| }, |
| .probe = ade7758_probe, |
| .remove = __devexit_p(ade7758_remove), |
| }; |
| |
| static __init int ade7758_init(void) |
| { |
| return spi_register_driver(&ade7758_driver); |
| } |
| module_init(ade7758_init); |
| |
| static __exit void ade7758_exit(void) |
| { |
| spi_unregister_driver(&ade7758_driver); |
| } |
| module_exit(ade7758_exit); |
| |
| MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); |
| MODULE_DESCRIPTION("Analog Devices ADE7758 Polyphase Multifunction Energy Metering IC Driver"); |
| MODULE_LICENSE("GPL v2"); |