From: Lars-Peter Clausen Date: Fri, 3 Oct 2014 09:31:00 +0000 (+0100) Subject: staging:iio: Move ad799x driver out of staging X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=bd75afaa314b2743c5379df3ccc84fab03126b71;p=deliverable%2Flinux.git staging:iio: Move ad799x driver out of staging The driver is now at a reasonable quality level. Move it out of staging. Signed-off-by: Lars-Peter Clausen Acked-by: Hartmut Knaack Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 555320659c99..a0368119c275 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -96,6 +96,17 @@ config AD7923 To compile this driver as a module, choose M here: the module will be called ad7923. +config AD799X + tristate "Analog Devices AD799x ADC driver" + depends on I2C + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build support for Analog Devices: + ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997, ad7998 + i2c analog to digital converters (ADC). Provides direct access + via sysfs. + config AT91_ADC tristate "Atmel AT91 ADC" depends on ARCH_AT91 diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 89f1216e636a..1e2fc8912825 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_AD7476) += ad7476.o obj-$(CONFIG_AD7791) += ad7791.o obj-$(CONFIG_AD7793) += ad7793.o obj-$(CONFIG_AD7887) += ad7887.o +obj-$(CONFIG_AD799X) += ad799x.o obj-$(CONFIG_AT91_ADC) += at91_adc.o obj-$(CONFIG_EXYNOS_ADC) += exynos_adc.o obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c new file mode 100644 index 000000000000..bcbf6102efed --- /dev/null +++ b/drivers/iio/adc/ad799x.c @@ -0,0 +1,794 @@ +/* + * iio/adc/ad799x.c + * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc. + * + * based on iio/adc/max1363 + * Copyright (C) 2008-2010 Jonathan Cameron + * + * based on linux/drivers/i2c/chips/max123x + * Copyright (C) 2002-2004 Stefan Eletzhofer + * + * based on linux/drivers/acron/char/pcf8583.c + * Copyright (C) 2000 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * ad799x.c + * + * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997, + * ad7998 and similar chips. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#define AD799X_CHANNEL_SHIFT 4 +#define AD799X_STORAGEBITS 16 +/* + * AD7991, AD7995 and AD7999 defines + */ + +#define AD7991_REF_SEL 0x08 +#define AD7991_FLTR 0x04 +#define AD7991_BIT_TRIAL_DELAY 0x02 +#define AD7991_SAMPLE_DELAY 0x01 + +/* + * AD7992, AD7993, AD7994, AD7997 and AD7998 defines + */ + +#define AD7998_FLTR 0x08 +#define AD7998_ALERT_EN 0x04 +#define AD7998_BUSY_ALERT 0x02 +#define AD7998_BUSY_ALERT_POL 0x01 + +#define AD7998_CONV_RES_REG 0x0 +#define AD7998_ALERT_STAT_REG 0x1 +#define AD7998_CONF_REG 0x2 +#define AD7998_CYCLE_TMR_REG 0x3 + +#define AD7998_DATALOW_REG(x) ((x) * 3 + 0x4) +#define AD7998_DATAHIGH_REG(x) ((x) * 3 + 0x5) +#define AD7998_HYST_REG(x) ((x) * 3 + 0x6) + +#define AD7998_CYC_MASK 0x7 +#define AD7998_CYC_DIS 0x0 +#define AD7998_CYC_TCONF_32 0x1 +#define AD7998_CYC_TCONF_64 0x2 +#define AD7998_CYC_TCONF_128 0x3 +#define AD7998_CYC_TCONF_256 0x4 +#define AD7998_CYC_TCONF_512 0x5 +#define AD7998_CYC_TCONF_1024 0x6 +#define AD7998_CYC_TCONF_2048 0x7 + +#define AD7998_ALERT_STAT_CLEAR 0xFF + +/* + * AD7997 and AD7997 defines + */ + +#define AD7997_8_READ_SINGLE 0x80 +#define AD7997_8_READ_SEQUENCE 0x70 +/* TODO: move this into a common header */ +#define RES_MASK(bits) ((1 << (bits)) - 1) + +enum { + ad7991, + ad7995, + ad7999, + ad7992, + ad7993, + ad7994, + ad7997, + ad7998 +}; + +/** + * struct ad799x_chip_info - chip specifc information + * @channel: channel specification + * @num_channels: number of channels + * @monitor_mode: whether the chip supports monitor interrupts + * @default_config: device default configuration + * @event_attrs: pointer to the monitor event attribute group + */ +struct ad799x_chip_info { + struct iio_chan_spec channel[9]; + int num_channels; + u16 default_config; + const struct iio_info *info; +}; + +struct ad799x_state { + struct i2c_client *client; + const struct ad799x_chip_info *chip_info; + struct regulator *reg; + struct regulator *vref; + unsigned id; + u16 config; + + u8 *rx_buf; + unsigned int transfer_size; +}; + +/** + * ad799x_trigger_handler() bh of trigger launched polling to ring buffer + * + * Currently there is no option in this driver to disable the saving of + * timestamps within the ring. + **/ +static irqreturn_t ad799x_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ad799x_state *st = iio_priv(indio_dev); + int b_sent; + u8 cmd; + + switch (st->id) { + case ad7991: + case ad7995: + case ad7999: + cmd = st->config | + (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT); + break; + case ad7992: + case ad7993: + case ad7994: + cmd = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) | + AD7998_CONV_RES_REG; + break; + case ad7997: + case ad7998: + cmd = AD7997_8_READ_SEQUENCE | AD7998_CONV_RES_REG; + break; + default: + cmd = 0; + } + + b_sent = i2c_smbus_read_i2c_block_data(st->client, + cmd, st->transfer_size, st->rx_buf); + if (b_sent < 0) + goto out; + + iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf, + iio_get_time_ns()); +out: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +/* + * ad799x register access by I2C + */ +static int ad799x_i2c_read16(struct ad799x_state *st, u8 reg, u16 *data) +{ + struct i2c_client *client = st->client; + int ret = 0; + + ret = i2c_smbus_read_word_swapped(client, reg); + if (ret < 0) { + dev_err(&client->dev, "I2C read error\n"); + return ret; + } + + *data = (u16)ret; + + return 0; +} + +static int ad799x_i2c_read8(struct ad799x_state *st, u8 reg, u8 *data) +{ + struct i2c_client *client = st->client; + int ret = 0; + + ret = i2c_smbus_read_byte_data(client, reg); + if (ret < 0) { + dev_err(&client->dev, "I2C read error\n"); + return ret; + } + + *data = (u8)ret; + + return 0; +} + +static int ad799x_i2c_write16(struct ad799x_state *st, u8 reg, u16 data) +{ + struct i2c_client *client = st->client; + int ret = 0; + + ret = i2c_smbus_write_word_swapped(client, reg, data); + if (ret < 0) + dev_err(&client->dev, "I2C write error\n"); + + return ret; +} + +static int ad799x_i2c_write8(struct ad799x_state *st, u8 reg, u8 data) +{ + struct i2c_client *client = st->client; + int ret = 0; + + ret = i2c_smbus_write_byte_data(client, reg, data); + if (ret < 0) + dev_err(&client->dev, "I2C write error\n"); + + return ret; +} + +static int ad7997_8_update_scan_mode(struct iio_dev *indio_dev, + const unsigned long *scan_mask) +{ + struct ad799x_state *st = iio_priv(indio_dev); + + kfree(st->rx_buf); + st->rx_buf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + if (!st->rx_buf) + return -ENOMEM; + + st->transfer_size = bitmap_weight(scan_mask, indio_dev->masklength) * 2; + + switch (st->id) { + case ad7997: + case ad7998: + return ad799x_i2c_write16(st, AD7998_CONF_REG, + st->config | (*scan_mask << AD799X_CHANNEL_SHIFT)); + default: + break; + } + + return 0; +} + +static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch) +{ + u16 rxbuf; + u8 cmd; + int ret; + + switch (st->id) { + case ad7991: + case ad7995: + case ad7999: + cmd = st->config | ((1 << ch) << AD799X_CHANNEL_SHIFT); + break; + case ad7992: + case ad7993: + case ad7994: + cmd = (1 << ch) << AD799X_CHANNEL_SHIFT; + break; + case ad7997: + case ad7998: + cmd = (ch << AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE; + break; + default: + return -EINVAL; + } + + ret = ad799x_i2c_read16(st, cmd, &rxbuf); + if (ret < 0) + return ret; + + return rxbuf; +} + +static int ad799x_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long m) +{ + int ret; + struct ad799x_state *st = iio_priv(indio_dev); + + switch (m) { + case IIO_CHAN_INFO_RAW: + mutex_lock(&indio_dev->mlock); + if (iio_buffer_enabled(indio_dev)) + ret = -EBUSY; + else + ret = ad799x_scan_direct(st, chan->scan_index); + mutex_unlock(&indio_dev->mlock); + + if (ret < 0) + return ret; + *val = (ret >> chan->scan_type.shift) & + RES_MASK(chan->scan_type.realbits); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + ret = regulator_get_voltage(st->vref); + if (ret < 0) + return ret; + *val = ret / 1000; + *val2 = chan->scan_type.realbits; + return IIO_VAL_FRACTIONAL_LOG2; + } + return -EINVAL; +} +static const unsigned int ad7998_frequencies[] = { + [AD7998_CYC_DIS] = 0, + [AD7998_CYC_TCONF_32] = 15625, + [AD7998_CYC_TCONF_64] = 7812, + [AD7998_CYC_TCONF_128] = 3906, + [AD7998_CYC_TCONF_512] = 976, + [AD7998_CYC_TCONF_1024] = 488, + [AD7998_CYC_TCONF_2048] = 244, +}; +static ssize_t ad799x_read_frequency(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ad799x_state *st = iio_priv(indio_dev); + + int ret; + u8 val; + ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &val); + if (ret) + return ret; + + val &= AD7998_CYC_MASK; + + return sprintf(buf, "%u\n", ad7998_frequencies[val]); +} + +static ssize_t ad799x_write_frequency(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct ad799x_state *st = iio_priv(indio_dev); + + long val; + int ret, i; + u8 t; + + ret = kstrtol(buf, 10, &val); + if (ret) + return ret; + + mutex_lock(&indio_dev->mlock); + ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &t); + if (ret) + goto error_ret_mutex; + /* Wipe the bits clean */ + t &= ~AD7998_CYC_MASK; + + for (i = 0; i < ARRAY_SIZE(ad7998_frequencies); i++) + if (val == ad7998_frequencies[i]) + break; + if (i == ARRAY_SIZE(ad7998_frequencies)) { + ret = -EINVAL; + goto error_ret_mutex; + } + t |= i; + ret = ad799x_i2c_write8(st, AD7998_CYCLE_TMR_REG, t); + +error_ret_mutex: + mutex_unlock(&indio_dev->mlock); + + return ret ? ret : len; +} + +static int ad799x_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + return 1; +} + +static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan, + enum iio_event_direction dir, + enum iio_event_info info) +{ + switch (info) { + case IIO_EV_INFO_VALUE: + if (dir == IIO_EV_DIR_FALLING) + return AD7998_DATALOW_REG(chan->channel); + else + return AD7998_DATAHIGH_REG(chan->channel); + case IIO_EV_INFO_HYSTERESIS: + return AD7998_HYST_REG(chan->channel); + default: + return -EINVAL; + } + + return 0; +} + +static int ad799x_write_event_value(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + int ret; + struct ad799x_state *st = iio_priv(indio_dev); + + mutex_lock(&indio_dev->mlock); + ret = ad799x_i2c_write16(st, ad799x_threshold_reg(chan, dir, info), + val); + mutex_unlock(&indio_dev->mlock); + + return ret; +} + +static int ad799x_read_event_value(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + int ret; + struct ad799x_state *st = iio_priv(indio_dev); + u16 valin; + + mutex_lock(&indio_dev->mlock); + ret = ad799x_i2c_read16(st, ad799x_threshold_reg(chan, dir, info), + &valin); + mutex_unlock(&indio_dev->mlock); + if (ret < 0) + return ret; + *val = valin; + + return IIO_VAL_INT; +} + +static irqreturn_t ad799x_event_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct ad799x_state *st = iio_priv(private); + u8 status; + int i, ret; + + ret = ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status); + if (ret) + goto done; + + if (!status) + goto done; + + ad799x_i2c_write8(st, AD7998_ALERT_STAT_REG, AD7998_ALERT_STAT_CLEAR); + + for (i = 0; i < 8; i++) { + if (status & (1 << i)) + iio_push_event(indio_dev, + i & 0x1 ? + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, + (i >> 1), + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING) : + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, + (i >> 1), + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + iio_get_time_ns()); + } + +done: + return IRQ_HANDLED; +} + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + ad799x_read_frequency, + ad799x_write_frequency); +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0"); + +static struct attribute *ad799x_event_attributes[] = { + &iio_dev_attr_sampling_frequency.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, + NULL, +}; + +static struct attribute_group ad799x_event_attrs_group = { + .attrs = ad799x_event_attributes, + .name = "events", +}; + +static const struct iio_info ad7991_info = { + .read_raw = &ad799x_read_raw, + .driver_module = THIS_MODULE, +}; + +static const struct iio_info ad7993_4_7_8_info = { + .read_raw = &ad799x_read_raw, + .event_attrs = &ad799x_event_attrs_group, + .read_event_config = &ad799x_read_event_config, + .read_event_value = &ad799x_read_event_value, + .write_event_value = &ad799x_write_event_value, + .driver_module = THIS_MODULE, + .update_scan_mode = ad7997_8_update_scan_mode, +}; + +static const struct iio_event_spec ad799x_events[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_EITHER, + .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS), + }, +}; + +#define _AD799X_CHANNEL(_index, _realbits, _ev_spec, _num_ev_spec) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = (_index), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .scan_index = (_index), \ + .scan_type = { \ + .sign = 'u', \ + .realbits = (_realbits), \ + .storagebits = 16, \ + .shift = 12 - (_realbits), \ + .endianness = IIO_BE, \ + }, \ + .event_spec = _ev_spec, \ + .num_event_specs = _num_ev_spec, \ +} + +#define AD799X_CHANNEL(_index, _realbits) \ + _AD799X_CHANNEL(_index, _realbits, NULL, 0) + +#define AD799X_CHANNEL_WITH_EVENTS(_index, _realbits) \ + _AD799X_CHANNEL(_index, _realbits, ad799x_events, \ + ARRAY_SIZE(ad799x_events)) + +static const struct ad799x_chip_info ad799x_chip_info_tbl[] = { + [ad7991] = { + .channel = { + AD799X_CHANNEL(0, 12), + AD799X_CHANNEL(1, 12), + AD799X_CHANNEL(2, 12), + AD799X_CHANNEL(3, 12), + IIO_CHAN_SOFT_TIMESTAMP(4), + }, + .num_channels = 5, + .info = &ad7991_info, + }, + [ad7995] = { + .channel = { + AD799X_CHANNEL(0, 10), + AD799X_CHANNEL(1, 10), + AD799X_CHANNEL(2, 10), + AD799X_CHANNEL(3, 10), + IIO_CHAN_SOFT_TIMESTAMP(4), + }, + .num_channels = 5, + .info = &ad7991_info, + }, + [ad7999] = { + .channel = { + AD799X_CHANNEL(0, 8), + AD799X_CHANNEL(1, 8), + AD799X_CHANNEL(2, 8), + AD799X_CHANNEL(3, 8), + IIO_CHAN_SOFT_TIMESTAMP(4), + }, + .num_channels = 5, + .info = &ad7991_info, + }, + [ad7992] = { + .channel = { + AD799X_CHANNEL_WITH_EVENTS(0, 12), + AD799X_CHANNEL_WITH_EVENTS(1, 12), + IIO_CHAN_SOFT_TIMESTAMP(3), + }, + .num_channels = 3, + .default_config = AD7998_ALERT_EN, + .info = &ad7993_4_7_8_info, + }, + [ad7993] = { + .channel = { + AD799X_CHANNEL_WITH_EVENTS(0, 10), + AD799X_CHANNEL_WITH_EVENTS(1, 10), + AD799X_CHANNEL_WITH_EVENTS(2, 10), + AD799X_CHANNEL_WITH_EVENTS(3, 10), + IIO_CHAN_SOFT_TIMESTAMP(4), + }, + .num_channels = 5, + .default_config = AD7998_ALERT_EN, + .info = &ad7993_4_7_8_info, + }, + [ad7994] = { + .channel = { + AD799X_CHANNEL_WITH_EVENTS(0, 12), + AD799X_CHANNEL_WITH_EVENTS(1, 12), + AD799X_CHANNEL_WITH_EVENTS(2, 12), + AD799X_CHANNEL_WITH_EVENTS(3, 12), + IIO_CHAN_SOFT_TIMESTAMP(4), + }, + .num_channels = 5, + .default_config = AD7998_ALERT_EN, + .info = &ad7993_4_7_8_info, + }, + [ad7997] = { + .channel = { + AD799X_CHANNEL_WITH_EVENTS(0, 10), + AD799X_CHANNEL_WITH_EVENTS(1, 10), + AD799X_CHANNEL_WITH_EVENTS(2, 10), + AD799X_CHANNEL_WITH_EVENTS(3, 10), + AD799X_CHANNEL(4, 10), + AD799X_CHANNEL(5, 10), + AD799X_CHANNEL(6, 10), + AD799X_CHANNEL(7, 10), + IIO_CHAN_SOFT_TIMESTAMP(8), + }, + .num_channels = 9, + .default_config = AD7998_ALERT_EN, + .info = &ad7993_4_7_8_info, + }, + [ad7998] = { + .channel = { + AD799X_CHANNEL_WITH_EVENTS(0, 12), + AD799X_CHANNEL_WITH_EVENTS(1, 12), + AD799X_CHANNEL_WITH_EVENTS(2, 12), + AD799X_CHANNEL_WITH_EVENTS(3, 12), + AD799X_CHANNEL(4, 12), + AD799X_CHANNEL(5, 12), + AD799X_CHANNEL(6, 12), + AD799X_CHANNEL(7, 12), + IIO_CHAN_SOFT_TIMESTAMP(8), + }, + .num_channels = 9, + .default_config = AD7998_ALERT_EN, + .info = &ad7993_4_7_8_info, + }, +}; + +static int ad799x_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct ad799x_state *st; + struct iio_dev *indio_dev; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); + /* this is only used for device removal purposes */ + i2c_set_clientdata(client, indio_dev); + + st->id = id->driver_data; + st->chip_info = &ad799x_chip_info_tbl[st->id]; + st->config = st->chip_info->default_config; + + /* TODO: Add pdata options for filtering and bit delay */ + + st->reg = devm_regulator_get(&client->dev, "vcc"); + if (IS_ERR(st->reg)) + return PTR_ERR(st->reg); + ret = regulator_enable(st->reg); + if (ret) + return ret; + st->vref = devm_regulator_get(&client->dev, "vref"); + if (IS_ERR(st->vref)) { + ret = PTR_ERR(st->vref); + goto error_disable_reg; + } + ret = regulator_enable(st->vref); + if (ret) + goto error_disable_reg; + + st->client = client; + + indio_dev->dev.parent = &client->dev; + indio_dev->name = id->name; + indio_dev->info = st->chip_info->info; + + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = st->chip_info->channel; + indio_dev->num_channels = st->chip_info->num_channels; + + ret = iio_triggered_buffer_setup(indio_dev, NULL, + &ad799x_trigger_handler, NULL); + if (ret) + goto error_disable_reg; + + if (client->irq > 0) { + ret = devm_request_threaded_irq(&client->dev, + client->irq, + NULL, + ad799x_event_handler, + IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + client->name, + indio_dev); + if (ret) + goto error_cleanup_ring; + } + ret = iio_device_register(indio_dev); + if (ret) + goto error_cleanup_ring; + + return 0; + +error_cleanup_ring: + iio_triggered_buffer_cleanup(indio_dev); +error_disable_reg: + if (!IS_ERR(st->vref)) + regulator_disable(st->vref); + if (!IS_ERR(st->reg)) + regulator_disable(st->reg); + + return ret; +} + +static int ad799x_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct ad799x_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + iio_triggered_buffer_cleanup(indio_dev); + if (!IS_ERR(st->vref)) + regulator_disable(st->vref); + if (!IS_ERR(st->reg)) + regulator_disable(st->reg); + kfree(st->rx_buf); + + return 0; +} + +static const struct i2c_device_id ad799x_id[] = { + { "ad7991", ad7991 }, + { "ad7995", ad7995 }, + { "ad7999", ad7999 }, + { "ad7992", ad7992 }, + { "ad7993", ad7993 }, + { "ad7994", ad7994 }, + { "ad7997", ad7997 }, + { "ad7998", ad7998 }, + {} +}; + +MODULE_DEVICE_TABLE(i2c, ad799x_id); + +static struct i2c_driver ad799x_driver = { + .driver = { + .name = "ad799x", + }, + .probe = ad799x_probe, + .remove = ad799x_remove, + .id_table = ad799x_id, +}; +module_i2c_driver(ad799x_driver); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices AD799x ADC"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig index ed23cceba17d..b87e382ad768 100644 --- a/drivers/staging/iio/adc/Kconfig +++ b/drivers/staging/iio/adc/Kconfig @@ -37,17 +37,6 @@ config AD7606_IFACE_SPI Say yes here to include parallel interface support on the AD7606 ADC driver. -config AD799X - tristate "Analog Devices AD799x ADC driver" - depends on I2C - select IIO_BUFFER - select IIO_TRIGGERED_BUFFER - help - Say yes here to build support for Analog Devices: - ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997, ad7998 - i2c analog to digital converters (ADC). Provides direct access - via sysfs. - config AD7780 tristate "Analog Devices AD7780 and similar ADCs driver" depends on SPI diff --git a/drivers/staging/iio/adc/Makefile b/drivers/staging/iio/adc/Makefile index b2d35f813292..afdcd1ff08ff 100644 --- a/drivers/staging/iio/adc/Makefile +++ b/drivers/staging/iio/adc/Makefile @@ -8,9 +8,6 @@ ad7606-$(CONFIG_AD7606_IFACE_PARALLEL) += ad7606_par.o ad7606-$(CONFIG_AD7606_IFACE_SPI) += ad7606_spi.o obj-$(CONFIG_AD7606) += ad7606.o -ad799x-y := ad799x_core.o -obj-$(CONFIG_AD799X) += ad799x.o - obj-$(CONFIG_AD7291) += ad7291.o obj-$(CONFIG_AD7780) += ad7780.o obj-$(CONFIG_AD7816) += ad7816.o diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c deleted file mode 100644 index bcbf6102efed..000000000000 --- a/drivers/staging/iio/adc/ad799x_core.c +++ /dev/null @@ -1,794 +0,0 @@ -/* - * iio/adc/ad799x.c - * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc. - * - * based on iio/adc/max1363 - * Copyright (C) 2008-2010 Jonathan Cameron - * - * based on linux/drivers/i2c/chips/max123x - * Copyright (C) 2002-2004 Stefan Eletzhofer - * - * based on linux/drivers/acron/char/pcf8583.c - * Copyright (C) 2000 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * ad799x.c - * - * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997, - * ad7998 and similar chips. - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -#define AD799X_CHANNEL_SHIFT 4 -#define AD799X_STORAGEBITS 16 -/* - * AD7991, AD7995 and AD7999 defines - */ - -#define AD7991_REF_SEL 0x08 -#define AD7991_FLTR 0x04 -#define AD7991_BIT_TRIAL_DELAY 0x02 -#define AD7991_SAMPLE_DELAY 0x01 - -/* - * AD7992, AD7993, AD7994, AD7997 and AD7998 defines - */ - -#define AD7998_FLTR 0x08 -#define AD7998_ALERT_EN 0x04 -#define AD7998_BUSY_ALERT 0x02 -#define AD7998_BUSY_ALERT_POL 0x01 - -#define AD7998_CONV_RES_REG 0x0 -#define AD7998_ALERT_STAT_REG 0x1 -#define AD7998_CONF_REG 0x2 -#define AD7998_CYCLE_TMR_REG 0x3 - -#define AD7998_DATALOW_REG(x) ((x) * 3 + 0x4) -#define AD7998_DATAHIGH_REG(x) ((x) * 3 + 0x5) -#define AD7998_HYST_REG(x) ((x) * 3 + 0x6) - -#define AD7998_CYC_MASK 0x7 -#define AD7998_CYC_DIS 0x0 -#define AD7998_CYC_TCONF_32 0x1 -#define AD7998_CYC_TCONF_64 0x2 -#define AD7998_CYC_TCONF_128 0x3 -#define AD7998_CYC_TCONF_256 0x4 -#define AD7998_CYC_TCONF_512 0x5 -#define AD7998_CYC_TCONF_1024 0x6 -#define AD7998_CYC_TCONF_2048 0x7 - -#define AD7998_ALERT_STAT_CLEAR 0xFF - -/* - * AD7997 and AD7997 defines - */ - -#define AD7997_8_READ_SINGLE 0x80 -#define AD7997_8_READ_SEQUENCE 0x70 -/* TODO: move this into a common header */ -#define RES_MASK(bits) ((1 << (bits)) - 1) - -enum { - ad7991, - ad7995, - ad7999, - ad7992, - ad7993, - ad7994, - ad7997, - ad7998 -}; - -/** - * struct ad799x_chip_info - chip specifc information - * @channel: channel specification - * @num_channels: number of channels - * @monitor_mode: whether the chip supports monitor interrupts - * @default_config: device default configuration - * @event_attrs: pointer to the monitor event attribute group - */ -struct ad799x_chip_info { - struct iio_chan_spec channel[9]; - int num_channels; - u16 default_config; - const struct iio_info *info; -}; - -struct ad799x_state { - struct i2c_client *client; - const struct ad799x_chip_info *chip_info; - struct regulator *reg; - struct regulator *vref; - unsigned id; - u16 config; - - u8 *rx_buf; - unsigned int transfer_size; -}; - -/** - * ad799x_trigger_handler() bh of trigger launched polling to ring buffer - * - * Currently there is no option in this driver to disable the saving of - * timestamps within the ring. - **/ -static irqreturn_t ad799x_trigger_handler(int irq, void *p) -{ - struct iio_poll_func *pf = p; - struct iio_dev *indio_dev = pf->indio_dev; - struct ad799x_state *st = iio_priv(indio_dev); - int b_sent; - u8 cmd; - - switch (st->id) { - case ad7991: - case ad7995: - case ad7999: - cmd = st->config | - (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT); - break; - case ad7992: - case ad7993: - case ad7994: - cmd = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) | - AD7998_CONV_RES_REG; - break; - case ad7997: - case ad7998: - cmd = AD7997_8_READ_SEQUENCE | AD7998_CONV_RES_REG; - break; - default: - cmd = 0; - } - - b_sent = i2c_smbus_read_i2c_block_data(st->client, - cmd, st->transfer_size, st->rx_buf); - if (b_sent < 0) - goto out; - - iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf, - iio_get_time_ns()); -out: - iio_trigger_notify_done(indio_dev->trig); - - return IRQ_HANDLED; -} - -/* - * ad799x register access by I2C - */ -static int ad799x_i2c_read16(struct ad799x_state *st, u8 reg, u16 *data) -{ - struct i2c_client *client = st->client; - int ret = 0; - - ret = i2c_smbus_read_word_swapped(client, reg); - if (ret < 0) { - dev_err(&client->dev, "I2C read error\n"); - return ret; - } - - *data = (u16)ret; - - return 0; -} - -static int ad799x_i2c_read8(struct ad799x_state *st, u8 reg, u8 *data) -{ - struct i2c_client *client = st->client; - int ret = 0; - - ret = i2c_smbus_read_byte_data(client, reg); - if (ret < 0) { - dev_err(&client->dev, "I2C read error\n"); - return ret; - } - - *data = (u8)ret; - - return 0; -} - -static int ad799x_i2c_write16(struct ad799x_state *st, u8 reg, u16 data) -{ - struct i2c_client *client = st->client; - int ret = 0; - - ret = i2c_smbus_write_word_swapped(client, reg, data); - if (ret < 0) - dev_err(&client->dev, "I2C write error\n"); - - return ret; -} - -static int ad799x_i2c_write8(struct ad799x_state *st, u8 reg, u8 data) -{ - struct i2c_client *client = st->client; - int ret = 0; - - ret = i2c_smbus_write_byte_data(client, reg, data); - if (ret < 0) - dev_err(&client->dev, "I2C write error\n"); - - return ret; -} - -static int ad7997_8_update_scan_mode(struct iio_dev *indio_dev, - const unsigned long *scan_mask) -{ - struct ad799x_state *st = iio_priv(indio_dev); - - kfree(st->rx_buf); - st->rx_buf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); - if (!st->rx_buf) - return -ENOMEM; - - st->transfer_size = bitmap_weight(scan_mask, indio_dev->masklength) * 2; - - switch (st->id) { - case ad7997: - case ad7998: - return ad799x_i2c_write16(st, AD7998_CONF_REG, - st->config | (*scan_mask << AD799X_CHANNEL_SHIFT)); - default: - break; - } - - return 0; -} - -static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch) -{ - u16 rxbuf; - u8 cmd; - int ret; - - switch (st->id) { - case ad7991: - case ad7995: - case ad7999: - cmd = st->config | ((1 << ch) << AD799X_CHANNEL_SHIFT); - break; - case ad7992: - case ad7993: - case ad7994: - cmd = (1 << ch) << AD799X_CHANNEL_SHIFT; - break; - case ad7997: - case ad7998: - cmd = (ch << AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE; - break; - default: - return -EINVAL; - } - - ret = ad799x_i2c_read16(st, cmd, &rxbuf); - if (ret < 0) - return ret; - - return rxbuf; -} - -static int ad799x_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long m) -{ - int ret; - struct ad799x_state *st = iio_priv(indio_dev); - - switch (m) { - case IIO_CHAN_INFO_RAW: - mutex_lock(&indio_dev->mlock); - if (iio_buffer_enabled(indio_dev)) - ret = -EBUSY; - else - ret = ad799x_scan_direct(st, chan->scan_index); - mutex_unlock(&indio_dev->mlock); - - if (ret < 0) - return ret; - *val = (ret >> chan->scan_type.shift) & - RES_MASK(chan->scan_type.realbits); - return IIO_VAL_INT; - case IIO_CHAN_INFO_SCALE: - ret = regulator_get_voltage(st->vref); - if (ret < 0) - return ret; - *val = ret / 1000; - *val2 = chan->scan_type.realbits; - return IIO_VAL_FRACTIONAL_LOG2; - } - return -EINVAL; -} -static const unsigned int ad7998_frequencies[] = { - [AD7998_CYC_DIS] = 0, - [AD7998_CYC_TCONF_32] = 15625, - [AD7998_CYC_TCONF_64] = 7812, - [AD7998_CYC_TCONF_128] = 3906, - [AD7998_CYC_TCONF_512] = 976, - [AD7998_CYC_TCONF_1024] = 488, - [AD7998_CYC_TCONF_2048] = 244, -}; -static ssize_t ad799x_read_frequency(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad799x_state *st = iio_priv(indio_dev); - - int ret; - u8 val; - ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &val); - if (ret) - return ret; - - val &= AD7998_CYC_MASK; - - return sprintf(buf, "%u\n", ad7998_frequencies[val]); -} - -static ssize_t ad799x_write_frequency(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad799x_state *st = iio_priv(indio_dev); - - long val; - int ret, i; - u8 t; - - ret = kstrtol(buf, 10, &val); - if (ret) - return ret; - - mutex_lock(&indio_dev->mlock); - ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &t); - if (ret) - goto error_ret_mutex; - /* Wipe the bits clean */ - t &= ~AD7998_CYC_MASK; - - for (i = 0; i < ARRAY_SIZE(ad7998_frequencies); i++) - if (val == ad7998_frequencies[i]) - break; - if (i == ARRAY_SIZE(ad7998_frequencies)) { - ret = -EINVAL; - goto error_ret_mutex; - } - t |= i; - ret = ad799x_i2c_write8(st, AD7998_CYCLE_TMR_REG, t); - -error_ret_mutex: - mutex_unlock(&indio_dev->mlock); - - return ret ? ret : len; -} - -static int ad799x_read_event_config(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, - enum iio_event_type type, - enum iio_event_direction dir) -{ - return 1; -} - -static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan, - enum iio_event_direction dir, - enum iio_event_info info) -{ - switch (info) { - case IIO_EV_INFO_VALUE: - if (dir == IIO_EV_DIR_FALLING) - return AD7998_DATALOW_REG(chan->channel); - else - return AD7998_DATAHIGH_REG(chan->channel); - case IIO_EV_INFO_HYSTERESIS: - return AD7998_HYST_REG(chan->channel); - default: - return -EINVAL; - } - - return 0; -} - -static int ad799x_write_event_value(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, - enum iio_event_type type, - enum iio_event_direction dir, - enum iio_event_info info, - int val, int val2) -{ - int ret; - struct ad799x_state *st = iio_priv(indio_dev); - - mutex_lock(&indio_dev->mlock); - ret = ad799x_i2c_write16(st, ad799x_threshold_reg(chan, dir, info), - val); - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static int ad799x_read_event_value(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, - enum iio_event_type type, - enum iio_event_direction dir, - enum iio_event_info info, - int *val, int *val2) -{ - int ret; - struct ad799x_state *st = iio_priv(indio_dev); - u16 valin; - - mutex_lock(&indio_dev->mlock); - ret = ad799x_i2c_read16(st, ad799x_threshold_reg(chan, dir, info), - &valin); - mutex_unlock(&indio_dev->mlock); - if (ret < 0) - return ret; - *val = valin; - - return IIO_VAL_INT; -} - -static irqreturn_t ad799x_event_handler(int irq, void *private) -{ - struct iio_dev *indio_dev = private; - struct ad799x_state *st = iio_priv(private); - u8 status; - int i, ret; - - ret = ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status); - if (ret) - goto done; - - if (!status) - goto done; - - ad799x_i2c_write8(st, AD7998_ALERT_STAT_REG, AD7998_ALERT_STAT_CLEAR); - - for (i = 0; i < 8; i++) { - if (status & (1 << i)) - iio_push_event(indio_dev, - i & 0x1 ? - IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, - (i >> 1), - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_RISING) : - IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, - (i >> 1), - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_FALLING), - iio_get_time_ns()); - } - -done: - return IRQ_HANDLED; -} - -static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, - ad799x_read_frequency, - ad799x_write_frequency); -static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0"); - -static struct attribute *ad799x_event_attributes[] = { - &iio_dev_attr_sampling_frequency.dev_attr.attr, - &iio_const_attr_sampling_frequency_available.dev_attr.attr, - NULL, -}; - -static struct attribute_group ad799x_event_attrs_group = { - .attrs = ad799x_event_attributes, - .name = "events", -}; - -static const struct iio_info ad7991_info = { - .read_raw = &ad799x_read_raw, - .driver_module = THIS_MODULE, -}; - -static const struct iio_info ad7993_4_7_8_info = { - .read_raw = &ad799x_read_raw, - .event_attrs = &ad799x_event_attrs_group, - .read_event_config = &ad799x_read_event_config, - .read_event_value = &ad799x_read_event_value, - .write_event_value = &ad799x_write_event_value, - .driver_module = THIS_MODULE, - .update_scan_mode = ad7997_8_update_scan_mode, -}; - -static const struct iio_event_spec ad799x_events[] = { - { - .type = IIO_EV_TYPE_THRESH, - .dir = IIO_EV_DIR_RISING, - .mask_separate = BIT(IIO_EV_INFO_VALUE) | - BIT(IIO_EV_INFO_ENABLE), - }, { - .type = IIO_EV_TYPE_THRESH, - .dir = IIO_EV_DIR_FALLING, - .mask_separate = BIT(IIO_EV_INFO_VALUE) | - BIT(IIO_EV_INFO_ENABLE), - }, { - .type = IIO_EV_TYPE_THRESH, - .dir = IIO_EV_DIR_EITHER, - .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS), - }, -}; - -#define _AD799X_CHANNEL(_index, _realbits, _ev_spec, _num_ev_spec) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .channel = (_index), \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ - .scan_index = (_index), \ - .scan_type = { \ - .sign = 'u', \ - .realbits = (_realbits), \ - .storagebits = 16, \ - .shift = 12 - (_realbits), \ - .endianness = IIO_BE, \ - }, \ - .event_spec = _ev_spec, \ - .num_event_specs = _num_ev_spec, \ -} - -#define AD799X_CHANNEL(_index, _realbits) \ - _AD799X_CHANNEL(_index, _realbits, NULL, 0) - -#define AD799X_CHANNEL_WITH_EVENTS(_index, _realbits) \ - _AD799X_CHANNEL(_index, _realbits, ad799x_events, \ - ARRAY_SIZE(ad799x_events)) - -static const struct ad799x_chip_info ad799x_chip_info_tbl[] = { - [ad7991] = { - .channel = { - AD799X_CHANNEL(0, 12), - AD799X_CHANNEL(1, 12), - AD799X_CHANNEL(2, 12), - AD799X_CHANNEL(3, 12), - IIO_CHAN_SOFT_TIMESTAMP(4), - }, - .num_channels = 5, - .info = &ad7991_info, - }, - [ad7995] = { - .channel = { - AD799X_CHANNEL(0, 10), - AD799X_CHANNEL(1, 10), - AD799X_CHANNEL(2, 10), - AD799X_CHANNEL(3, 10), - IIO_CHAN_SOFT_TIMESTAMP(4), - }, - .num_channels = 5, - .info = &ad7991_info, - }, - [ad7999] = { - .channel = { - AD799X_CHANNEL(0, 8), - AD799X_CHANNEL(1, 8), - AD799X_CHANNEL(2, 8), - AD799X_CHANNEL(3, 8), - IIO_CHAN_SOFT_TIMESTAMP(4), - }, - .num_channels = 5, - .info = &ad7991_info, - }, - [ad7992] = { - .channel = { - AD799X_CHANNEL_WITH_EVENTS(0, 12), - AD799X_CHANNEL_WITH_EVENTS(1, 12), - IIO_CHAN_SOFT_TIMESTAMP(3), - }, - .num_channels = 3, - .default_config = AD7998_ALERT_EN, - .info = &ad7993_4_7_8_info, - }, - [ad7993] = { - .channel = { - AD799X_CHANNEL_WITH_EVENTS(0, 10), - AD799X_CHANNEL_WITH_EVENTS(1, 10), - AD799X_CHANNEL_WITH_EVENTS(2, 10), - AD799X_CHANNEL_WITH_EVENTS(3, 10), - IIO_CHAN_SOFT_TIMESTAMP(4), - }, - .num_channels = 5, - .default_config = AD7998_ALERT_EN, - .info = &ad7993_4_7_8_info, - }, - [ad7994] = { - .channel = { - AD799X_CHANNEL_WITH_EVENTS(0, 12), - AD799X_CHANNEL_WITH_EVENTS(1, 12), - AD799X_CHANNEL_WITH_EVENTS(2, 12), - AD799X_CHANNEL_WITH_EVENTS(3, 12), - IIO_CHAN_SOFT_TIMESTAMP(4), - }, - .num_channels = 5, - .default_config = AD7998_ALERT_EN, - .info = &ad7993_4_7_8_info, - }, - [ad7997] = { - .channel = { - AD799X_CHANNEL_WITH_EVENTS(0, 10), - AD799X_CHANNEL_WITH_EVENTS(1, 10), - AD799X_CHANNEL_WITH_EVENTS(2, 10), - AD799X_CHANNEL_WITH_EVENTS(3, 10), - AD799X_CHANNEL(4, 10), - AD799X_CHANNEL(5, 10), - AD799X_CHANNEL(6, 10), - AD799X_CHANNEL(7, 10), - IIO_CHAN_SOFT_TIMESTAMP(8), - }, - .num_channels = 9, - .default_config = AD7998_ALERT_EN, - .info = &ad7993_4_7_8_info, - }, - [ad7998] = { - .channel = { - AD799X_CHANNEL_WITH_EVENTS(0, 12), - AD799X_CHANNEL_WITH_EVENTS(1, 12), - AD799X_CHANNEL_WITH_EVENTS(2, 12), - AD799X_CHANNEL_WITH_EVENTS(3, 12), - AD799X_CHANNEL(4, 12), - AD799X_CHANNEL(5, 12), - AD799X_CHANNEL(6, 12), - AD799X_CHANNEL(7, 12), - IIO_CHAN_SOFT_TIMESTAMP(8), - }, - .num_channels = 9, - .default_config = AD7998_ALERT_EN, - .info = &ad7993_4_7_8_info, - }, -}; - -static int ad799x_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int ret; - struct ad799x_state *st; - struct iio_dev *indio_dev; - - indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st)); - if (indio_dev == NULL) - return -ENOMEM; - - st = iio_priv(indio_dev); - /* this is only used for device removal purposes */ - i2c_set_clientdata(client, indio_dev); - - st->id = id->driver_data; - st->chip_info = &ad799x_chip_info_tbl[st->id]; - st->config = st->chip_info->default_config; - - /* TODO: Add pdata options for filtering and bit delay */ - - st->reg = devm_regulator_get(&client->dev, "vcc"); - if (IS_ERR(st->reg)) - return PTR_ERR(st->reg); - ret = regulator_enable(st->reg); - if (ret) - return ret; - st->vref = devm_regulator_get(&client->dev, "vref"); - if (IS_ERR(st->vref)) { - ret = PTR_ERR(st->vref); - goto error_disable_reg; - } - ret = regulator_enable(st->vref); - if (ret) - goto error_disable_reg; - - st->client = client; - - indio_dev->dev.parent = &client->dev; - indio_dev->name = id->name; - indio_dev->info = st->chip_info->info; - - indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = st->chip_info->channel; - indio_dev->num_channels = st->chip_info->num_channels; - - ret = iio_triggered_buffer_setup(indio_dev, NULL, - &ad799x_trigger_handler, NULL); - if (ret) - goto error_disable_reg; - - if (client->irq > 0) { - ret = devm_request_threaded_irq(&client->dev, - client->irq, - NULL, - ad799x_event_handler, - IRQF_TRIGGER_FALLING | - IRQF_ONESHOT, - client->name, - indio_dev); - if (ret) - goto error_cleanup_ring; - } - ret = iio_device_register(indio_dev); - if (ret) - goto error_cleanup_ring; - - return 0; - -error_cleanup_ring: - iio_triggered_buffer_cleanup(indio_dev); -error_disable_reg: - if (!IS_ERR(st->vref)) - regulator_disable(st->vref); - if (!IS_ERR(st->reg)) - regulator_disable(st->reg); - - return ret; -} - -static int ad799x_remove(struct i2c_client *client) -{ - struct iio_dev *indio_dev = i2c_get_clientdata(client); - struct ad799x_state *st = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - - iio_triggered_buffer_cleanup(indio_dev); - if (!IS_ERR(st->vref)) - regulator_disable(st->vref); - if (!IS_ERR(st->reg)) - regulator_disable(st->reg); - kfree(st->rx_buf); - - return 0; -} - -static const struct i2c_device_id ad799x_id[] = { - { "ad7991", ad7991 }, - { "ad7995", ad7995 }, - { "ad7999", ad7999 }, - { "ad7992", ad7992 }, - { "ad7993", ad7993 }, - { "ad7994", ad7994 }, - { "ad7997", ad7997 }, - { "ad7998", ad7998 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, ad799x_id); - -static struct i2c_driver ad799x_driver = { - .driver = { - .name = "ad799x", - }, - .probe = ad799x_probe, - .remove = ad799x_remove, - .id_table = ad799x_id, -}; -module_i2c_driver(ad799x_driver); - -MODULE_AUTHOR("Michael Hennerich "); -MODULE_DESCRIPTION("Analog Devices AD799x ADC"); -MODULE_LICENSE("GPL v2");