diff --git a/drivers/staging/iio/cdc/Kconfig b/drivers/staging/iio/cdc/Kconfig index 80211df8c577..b97478e7cbd0 100644 --- a/drivers/staging/iio/cdc/Kconfig +++ b/drivers/staging/iio/cdc/Kconfig @@ -13,16 +13,6 @@ config AD7150 To compile this driver as a module, choose M here: the module will be called ad7150. -config AD7152 - tristate "Analog Devices ad7152/3 capacitive sensor driver" - depends on I2C - help - Say yes here to build support for Analog Devices capacitive sensors. - (ad7152, ad7153) Provides direct access via sysfs. - - To compile this driver as a module, choose M here: the - module will be called ad7152. - config AD7746 tristate "Analog Devices AD7745, AD7746 AD7747 capacitive sensor driver" depends on I2C diff --git a/drivers/staging/iio/cdc/Makefile b/drivers/staging/iio/cdc/Makefile index a5fbabf5c8bf..1466bc31f244 100644 --- a/drivers/staging/iio/cdc/Makefile +++ b/drivers/staging/iio/cdc/Makefile @@ -3,5 +3,4 @@ # obj-$(CONFIG_AD7150) += ad7150.o -obj-$(CONFIG_AD7152) += ad7152.o obj-$(CONFIG_AD7746) += ad7746.o diff --git a/drivers/staging/iio/cdc/ad7152.c b/drivers/staging/iio/cdc/ad7152.c deleted file mode 100644 index 25f51db05d2d..000000000000 --- a/drivers/staging/iio/cdc/ad7152.c +++ /dev/null @@ -1,552 +0,0 @@ -/* - * AD7152 capacitive sensor driver supporting AD7152/3 - * - * Copyright 2010-2011a Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -/* - * TODO: Check compliance of calibbias with abi (units) - */ -/* - * AD7152 registers definition - */ - -#define AD7152_REG_STATUS 0 -#define AD7152_REG_CH1_DATA_HIGH 1 -#define AD7152_REG_CH2_DATA_HIGH 3 -#define AD7152_REG_CH1_OFFS_HIGH 5 -#define AD7152_REG_CH2_OFFS_HIGH 7 -#define AD7152_REG_CH1_GAIN_HIGH 9 -#define AD7152_REG_CH1_SETUP 11 -#define AD7152_REG_CH2_GAIN_HIGH 12 -#define AD7152_REG_CH2_SETUP 14 -#define AD7152_REG_CFG 15 -#define AD7152_REG_RESEVERD 16 -#define AD7152_REG_CAPDAC_POS 17 -#define AD7152_REG_CAPDAC_NEG 18 -#define AD7152_REG_CFG2 26 - -/* Status Register Bit Designations (AD7152_REG_STATUS) */ -#define AD7152_STATUS_RDY1 BIT(0) -#define AD7152_STATUS_RDY2 BIT(1) -#define AD7152_STATUS_C1C2 BIT(2) -#define AD7152_STATUS_PWDN BIT(7) - -/* Setup Register Bit Designations (AD7152_REG_CHx_SETUP) */ -#define AD7152_SETUP_CAPDIFF BIT(5) -#define AD7152_SETUP_RANGE_2pF (0 << 6) -#define AD7152_SETUP_RANGE_0_5pF (1 << 6) -#define AD7152_SETUP_RANGE_1pF (2 << 6) -#define AD7152_SETUP_RANGE_4pF (3 << 6) -#define AD7152_SETUP_RANGE(x) ((x) << 6) - -/* Config Register Bit Designations (AD7152_REG_CFG) */ -#define AD7152_CONF_CH2EN BIT(3) -#define AD7152_CONF_CH1EN BIT(4) -#define AD7152_CONF_MODE_IDLE (0 << 0) -#define AD7152_CONF_MODE_CONT_CONV (1 << 0) -#define AD7152_CONF_MODE_SINGLE_CONV (2 << 0) -#define AD7152_CONF_MODE_OFFS_CAL (5 << 0) -#define AD7152_CONF_MODE_GAIN_CAL (6 << 0) - -/* Capdac Register Bit Designations (AD7152_REG_CAPDAC_XXX) */ -#define AD7152_CAPDAC_DACEN BIT(7) -#define AD7152_CAPDAC_DACP(x) ((x) & 0x1F) - -/* CFG2 Register Bit Designations (AD7152_REG_CFG2) */ -#define AD7152_CFG2_OSR(x) (((x) & 0x3) << 4) - -enum { - AD7152_DATA, - AD7152_OFFS, - AD7152_GAIN, - AD7152_SETUP -}; - -/* - * struct ad7152_chip_info - chip specific information - */ - -struct ad7152_chip_info { - struct i2c_client *client; - /* - * Capacitive channel digital filter setup; - * conversion time/update rate setup per channel - */ - u8 filter_rate_setup; - u8 setup[2]; - struct mutex state_lock; /* protect hardware state */ -}; - -static inline ssize_t ad7152_start_calib(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len, - u8 regval) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad7152_chip_info *chip = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - bool doit; - int ret, timeout = 10; - - ret = strtobool(buf, &doit); - if (ret < 0) - return ret; - - if (!doit) - return 0; - - if (this_attr->address == 0) - regval |= AD7152_CONF_CH1EN; - else - regval |= AD7152_CONF_CH2EN; - - mutex_lock(&chip->state_lock); - ret = i2c_smbus_write_byte_data(chip->client, AD7152_REG_CFG, regval); - if (ret < 0) - goto unlock; - - do { - mdelay(20); - ret = i2c_smbus_read_byte_data(chip->client, AD7152_REG_CFG); - if (ret < 0) - goto unlock; - - } while ((ret == regval) && timeout--); - - mutex_unlock(&chip->state_lock); - return len; - -unlock: - mutex_unlock(&chip->state_lock); - return ret; -} - -static ssize_t ad7152_start_offset_calib(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - return ad7152_start_calib(dev, attr, buf, len, - AD7152_CONF_MODE_OFFS_CAL); -} - -static ssize_t ad7152_start_gain_calib(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - return ad7152_start_calib(dev, attr, buf, len, - AD7152_CONF_MODE_GAIN_CAL); -} - -static IIO_DEVICE_ATTR(in_capacitance0_calibbias_calibration, - 0200, NULL, ad7152_start_offset_calib, 0); -static IIO_DEVICE_ATTR(in_capacitance1_calibbias_calibration, - 0200, NULL, ad7152_start_offset_calib, 1); -static IIO_DEVICE_ATTR(in_capacitance0_calibscale_calibration, - 0200, NULL, ad7152_start_gain_calib, 0); -static IIO_DEVICE_ATTR(in_capacitance1_calibscale_calibration, - 0200, NULL, ad7152_start_gain_calib, 1); - -/* Values are Update Rate (Hz), Conversion Time (ms) + 1*/ -static const unsigned char ad7152_filter_rate_table[][2] = { - {200, 5 + 1}, {50, 20 + 1}, {20, 50 + 1}, {17, 60 + 1}, -}; - -static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("200 50 20 17"); - -static IIO_CONST_ATTR(in_capacitance_scale_available, - "0.000061050 0.000030525 0.000015263 0.000007631"); - -static struct attribute *ad7152_attributes[] = { - &iio_dev_attr_in_capacitance0_calibbias_calibration.dev_attr.attr, - &iio_dev_attr_in_capacitance1_calibbias_calibration.dev_attr.attr, - &iio_dev_attr_in_capacitance0_calibscale_calibration.dev_attr.attr, - &iio_dev_attr_in_capacitance1_calibscale_calibration.dev_attr.attr, - &iio_const_attr_in_capacitance_scale_available.dev_attr.attr, - &iio_const_attr_sampling_frequency_available.dev_attr.attr, - NULL, -}; - -static const struct attribute_group ad7152_attribute_group = { - .attrs = ad7152_attributes, -}; - -static const u8 ad7152_addresses[][4] = { - { AD7152_REG_CH1_DATA_HIGH, AD7152_REG_CH1_OFFS_HIGH, - AD7152_REG_CH1_GAIN_HIGH, AD7152_REG_CH1_SETUP }, - { AD7152_REG_CH2_DATA_HIGH, AD7152_REG_CH2_OFFS_HIGH, - AD7152_REG_CH2_GAIN_HIGH, AD7152_REG_CH2_SETUP }, -}; - -/* Values are nano relative to pf base. */ -static const int ad7152_scale_table[] = { - 30525, 7631, 15263, 61050 -}; - -/** - * read_raw handler for IIO_CHAN_INFO_SAMP_FREQ - * - * lock must be held - **/ -static int ad7152_read_raw_samp_freq(struct device *dev, int *val) -{ - struct ad7152_chip_info *chip = iio_priv(dev_to_iio_dev(dev)); - - *val = ad7152_filter_rate_table[chip->filter_rate_setup][0]; - - return 0; -} - -/** - * write_raw handler for IIO_CHAN_INFO_SAMP_FREQ - * - * lock must be held - **/ -static int ad7152_write_raw_samp_freq(struct device *dev, int val) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad7152_chip_info *chip = iio_priv(indio_dev); - int ret, i; - - for (i = 0; i < ARRAY_SIZE(ad7152_filter_rate_table); i++) - if (val >= ad7152_filter_rate_table[i][0]) - break; - - if (i >= ARRAY_SIZE(ad7152_filter_rate_table)) - i = ARRAY_SIZE(ad7152_filter_rate_table) - 1; - - ret = i2c_smbus_write_byte_data(chip->client, - AD7152_REG_CFG2, AD7152_CFG2_OSR(i)); - if (ret < 0) - return ret; - - chip->filter_rate_setup = i; - - return ret; -} - -static int ad7152_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) -{ - struct ad7152_chip_info *chip = iio_priv(indio_dev); - int ret, i; - - mutex_lock(&chip->state_lock); - - switch (mask) { - case IIO_CHAN_INFO_CALIBSCALE: - if (val != 1) { - ret = -EINVAL; - goto out; - } - - val = (val2 * 1024) / 15625; - - ret = i2c_smbus_write_word_data(chip->client, - ad7152_addresses[chan->channel][AD7152_GAIN], - swab16(val)); - if (ret < 0) - goto out; - - ret = 0; - break; - - case IIO_CHAN_INFO_CALIBBIAS: - if ((val < 0) | (val > 0xFFFF)) { - ret = -EINVAL; - goto out; - } - ret = i2c_smbus_write_word_data(chip->client, - ad7152_addresses[chan->channel][AD7152_OFFS], - swab16(val)); - if (ret < 0) - goto out; - - ret = 0; - break; - case IIO_CHAN_INFO_SCALE: - if (val) { - ret = -EINVAL; - goto out; - } - for (i = 0; i < ARRAY_SIZE(ad7152_scale_table); i++) - if (val2 == ad7152_scale_table[i]) - break; - - chip->setup[chan->channel] &= ~AD7152_SETUP_RANGE_4pF; - chip->setup[chan->channel] |= AD7152_SETUP_RANGE(i); - - ret = i2c_smbus_write_byte_data(chip->client, - ad7152_addresses[chan->channel][AD7152_SETUP], - chip->setup[chan->channel]); - if (ret < 0) - goto out; - - ret = 0; - break; - case IIO_CHAN_INFO_SAMP_FREQ: - if (val2) { - ret = -EINVAL; - goto out; - } - ret = ad7152_write_raw_samp_freq(&indio_dev->dev, val); - if (ret < 0) - goto out; - - ret = 0; - break; - default: - ret = -EINVAL; - } - -out: - mutex_unlock(&chip->state_lock); - return ret; -} - -static int ad7152_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, int *val2, - long mask) -{ - struct ad7152_chip_info *chip = iio_priv(indio_dev); - int ret; - u8 regval = 0; - - mutex_lock(&chip->state_lock); - - switch (mask) { - case IIO_CHAN_INFO_RAW: - /* First set whether in differential mode */ - - regval = chip->setup[chan->channel]; - - if (chan->differential) - chip->setup[chan->channel] |= AD7152_SETUP_CAPDIFF; - else - chip->setup[chan->channel] &= ~AD7152_SETUP_CAPDIFF; - - if (regval != chip->setup[chan->channel]) { - ret = i2c_smbus_write_byte_data(chip->client, - ad7152_addresses[chan->channel][AD7152_SETUP], - chip->setup[chan->channel]); - if (ret < 0) - goto out; - } - /* Make sure the channel is enabled */ - if (chan->channel == 0) - regval = AD7152_CONF_CH1EN; - else - regval = AD7152_CONF_CH2EN; - - /* Trigger a single read */ - regval |= AD7152_CONF_MODE_SINGLE_CONV; - ret = i2c_smbus_write_byte_data(chip->client, AD7152_REG_CFG, - regval); - if (ret < 0) - goto out; - - msleep(ad7152_filter_rate_table[chip->filter_rate_setup][1]); - /* Now read the actual register */ - ret = i2c_smbus_read_word_data(chip->client, - ad7152_addresses[chan->channel][AD7152_DATA]); - if (ret < 0) - goto out; - *val = swab16(ret); - - if (chan->differential) - *val -= 0x8000; - - ret = IIO_VAL_INT; - break; - case IIO_CHAN_INFO_CALIBSCALE: - - ret = i2c_smbus_read_word_data(chip->client, - ad7152_addresses[chan->channel][AD7152_GAIN]); - if (ret < 0) - goto out; - /* 1 + gain_val / 2^16 */ - *val = 1; - *val2 = (15625 * swab16(ret)) / 1024; - - ret = IIO_VAL_INT_PLUS_MICRO; - break; - case IIO_CHAN_INFO_CALIBBIAS: - ret = i2c_smbus_read_word_data(chip->client, - ad7152_addresses[chan->channel][AD7152_OFFS]); - if (ret < 0) - goto out; - *val = swab16(ret); - - ret = IIO_VAL_INT; - break; - case IIO_CHAN_INFO_SCALE: - ret = i2c_smbus_read_byte_data(chip->client, - ad7152_addresses[chan->channel][AD7152_SETUP]); - if (ret < 0) - goto out; - *val = 0; - *val2 = ad7152_scale_table[ret >> 6]; - - ret = IIO_VAL_INT_PLUS_NANO; - break; - case IIO_CHAN_INFO_SAMP_FREQ: - ret = ad7152_read_raw_samp_freq(&indio_dev->dev, val); - if (ret < 0) - goto out; - - ret = IIO_VAL_INT; - break; - default: - ret = -EINVAL; - } -out: - mutex_unlock(&chip->state_lock); - return ret; -} - -static int ad7152_write_raw_get_fmt(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - long mask) -{ - switch (mask) { - case IIO_CHAN_INFO_SCALE: - return IIO_VAL_INT_PLUS_NANO; - default: - return IIO_VAL_INT_PLUS_MICRO; - } -} - -static const struct iio_info ad7152_info = { - .attrs = &ad7152_attribute_group, - .read_raw = ad7152_read_raw, - .write_raw = ad7152_write_raw, - .write_raw_get_fmt = ad7152_write_raw_get_fmt, -}; - -static const struct iio_chan_spec ad7152_channels[] = { - { - .type = IIO_CAPACITANCE, - .indexed = 1, - .channel = 0, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | - BIT(IIO_CHAN_INFO_CALIBSCALE) | - BIT(IIO_CHAN_INFO_CALIBBIAS) | - BIT(IIO_CHAN_INFO_SCALE), - .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), - }, { - .type = IIO_CAPACITANCE, - .differential = 1, - .indexed = 1, - .channel = 0, - .channel2 = 2, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | - BIT(IIO_CHAN_INFO_CALIBSCALE) | - BIT(IIO_CHAN_INFO_CALIBBIAS) | - BIT(IIO_CHAN_INFO_SCALE), - .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), - }, { - .type = IIO_CAPACITANCE, - .indexed = 1, - .channel = 1, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | - BIT(IIO_CHAN_INFO_CALIBSCALE) | - BIT(IIO_CHAN_INFO_CALIBBIAS) | - BIT(IIO_CHAN_INFO_SCALE), - .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), - }, { - .type = IIO_CAPACITANCE, - .differential = 1, - .indexed = 1, - .channel = 1, - .channel2 = 3, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | - BIT(IIO_CHAN_INFO_CALIBSCALE) | - BIT(IIO_CHAN_INFO_CALIBBIAS) | - BIT(IIO_CHAN_INFO_SCALE), - .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), - } -}; - -/* - * device probe and remove - */ - -static int ad7152_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int ret = 0; - struct ad7152_chip_info *chip; - struct iio_dev *indio_dev; - - indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); - if (!indio_dev) - return -ENOMEM; - chip = iio_priv(indio_dev); - /* this is only used for device removal purposes */ - i2c_set_clientdata(client, indio_dev); - - chip->client = client; - mutex_init(&chip->state_lock); - - /* Establish that the iio_dev is a child of the i2c device */ - indio_dev->name = id->name; - indio_dev->dev.parent = &client->dev; - indio_dev->info = &ad7152_info; - indio_dev->channels = ad7152_channels; - if (id->driver_data == 0) - indio_dev->num_channels = ARRAY_SIZE(ad7152_channels); - else - indio_dev->num_channels = 2; - indio_dev->num_channels = ARRAY_SIZE(ad7152_channels); - indio_dev->modes = INDIO_DIRECT_MODE; - - ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev); - if (ret) - return ret; - - dev_err(&client->dev, "%s capacitive sensor registered\n", id->name); - - return 0; -} - -static const struct i2c_device_id ad7152_id[] = { - { "ad7152", 0 }, - { "ad7153", 1 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, ad7152_id); - -static struct i2c_driver ad7152_driver = { - .driver = { - .name = KBUILD_MODNAME, - }, - .probe = ad7152_probe, - .id_table = ad7152_id, -}; -module_i2c_driver(ad7152_driver); - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices AD7152/3 capacitive sensor driver"); -MODULE_LICENSE("GPL v2");