On 07/12/15 09:09, Marc Titinger wrote: > in SOFTWARE buffer mode, a kthread will capture the active scan_elements > into a kfifo, then compute the remaining time until the next capture tick > and do an active wait (udelay). > > This will produce a stream of up to fours channels plus a 64bits > timestamps (ns). > > Tested with ina226, on BeagleBoneBlack. > > Datasheet: http://www.ti.com/lit/gpn/ina226 > > Signed-off-by: Marc Titinger <mtitinger@xxxxxxxxxxxx> One small (largely semantic) issue with balanced post enable / pre disable (rather than post disable) for the buffer. Otherwise fine so I'll apply this and fix that up in the process. Applied to the togreg branch of iio.git - pushed out as testing. Was a bit of additional fuzz but I think the merge was straightforward. Long term - might move this out to a meter directory along with the various power monitors that are in staging/iio/meter. Thanks, Jonathan > --- > drivers/iio/adc/Kconfig | 10 + > drivers/iio/adc/Makefile | 1 + > drivers/iio/adc/ina2xx-adc.c | 670 +++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 681 insertions(+) > create mode 100644 drivers/iio/adc/ina2xx-adc.c > > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig > index eb0cd89..e5fdc7d 100644 > --- a/drivers/iio/adc/Kconfig > +++ b/drivers/iio/adc/Kconfig > @@ -170,6 +170,16 @@ config EXYNOS_ADC > of SoCs for drivers such as the touchscreen and hwmon to use to share > this resource. > > +config INA2XX_ADC > + tristate "Texas Instruments INA2xx Power Monitors IIO driver" > + depends on I2C && !SENSORS_INA2XX > + select REGMAP_I2C > + select IIO_BUFFER > + select IIO_KFIFO_BUF > + help > + Say yes here to build support for TI INA2xx family of Power Monitors. > + This driver is mutually exclusive with the HWMON version. > + > config LP8788_ADC > tristate "LP8788 ADC driver" > depends on MFD_LP8788 > diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile > index a096210..2869b0ef 100644 > --- a/drivers/iio/adc/Makefile > +++ b/drivers/iio/adc/Makefile > @@ -19,6 +19,7 @@ obj-$(CONFIG_BERLIN2_ADC) += berlin2-adc.o > obj-$(CONFIG_DA9150_GPADC) += da9150-gpadc.o > obj-$(CONFIG_CC10001_ADC) += cc10001_adc.o > obj-$(CONFIG_EXYNOS_ADC) += exynos_adc.o > +obj-$(CONFIG_INA2XX_ADC) += ina2xx-adc.o > obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o > obj-$(CONFIG_MAX1027) += max1027.o > obj-$(CONFIG_MAX1363) += max1363.o > diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c > new file mode 100644 > index 0000000..0e7c474 > --- /dev/null > +++ b/drivers/iio/adc/ina2xx-adc.c > @@ -0,0 +1,670 @@ > +/* > + * INA2XX Current and Power Monitors > + * > + * Copyright 2015 Baylibre SAS. > + * > + * 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. > + * > + * Based on linux/drivers/iio/adc/ad7291.c > + * Copyright 2010-2011 Analog Devices Inc. > + * > + * Based on linux/drivers/hwmon/ina2xx.c > + * Copyright 2012 Lothar Felten <l-felten@xxxxxx> > + * > + * Licensed under the GPL-2 or later. > + * > + * IIO driver for INA219-220-226-230-231 > + * > + * Configurable 7-bit I2C slave address from 0x40 to 0x4F > + */ > +#include <linux/module.h> > +#include <linux/kthread.h> > +#include <linux/delay.h> > +#include <linux/iio/kfifo_buf.h> > +#include <linux/iio/sysfs.h> > +#include <linux/i2c.h> > +#include <linux/regmap.h> > +#include <linux/platform_data/ina2xx.h> > + > +#include <linux/util_macros.h> > + > +/* INA2XX registers definition */ > +#define INA2XX_CONFIG 0x00 > +#define INA2XX_SHUNT_VOLTAGE 0x01 /* readonly */ > +#define INA2XX_BUS_VOLTAGE 0x02 /* readonly */ > +#define INA2XX_POWER 0x03 /* readonly */ > +#define INA2XX_CURRENT 0x04 /* readonly */ > +#define INA2XX_CALIBRATION 0x05 > + > +#define INA226_ALERT_MASK 0x06 > +#define INA266_CVRF BIT(3) > + > +#define INA2XX_MAX_REGISTERS 8 > + > +/* settings - depend on use case */ > +#define INA219_CONFIG_DEFAULT 0x399F /* PGA=8 */ > +#define INA226_CONFIG_DEFAULT 0x4327 > +#define INA226_DEFAULT_AVG 4 > +#define INA226_DEFAULT_IT 1110 > + > +#define INA2XX_RSHUNT_DEFAULT 10000 > + > +/* > + * bit mask for reading the averaging setting in the configuration register > + * FIXME: use regmap_fields. > + */ > +#define INA2XX_MODE_MASK GENMASK(3, 0) > + > +#define INA226_AVG_MASK GENMASK(11, 9) > +#define INA226_SHIFT_AVG(val) ((val) << 9) > + > +/* Integration time for VBus */ > +#define INA226_ITB_MASK GENMASK(8, 6) > +#define INA226_SHIFT_ITB(val) ((val) << 6) > + > +/* Integration time for VShunt */ > +#define INA226_ITS_MASK GENMASK(5, 3) > +#define INA226_SHIFT_ITS(val) ((val) << 3) > + > +/* Cosmetic macro giving the sampling period for a full P=UxI cycle */ > +#define SAMPLING_PERIOD(c) ((c->int_time_vbus + c->int_time_vshunt) \ > + * c->avg) > + > +static bool ina2xx_is_writeable_reg(struct device *dev, unsigned int reg) > +{ > + return (reg == INA2XX_CONFIG) || (reg > INA2XX_CURRENT); > +} > + > +static bool ina2xx_is_volatile_reg(struct device *dev, unsigned int reg) > +{ > + return (reg != INA2XX_CONFIG); > +} > + > +static const struct regmap_config ina2xx_regmap_config = { > + .reg_bits = 8, > + .val_bits = 16, > + .max_register = INA2XX_MAX_REGISTERS, > + .writeable_reg = ina2xx_is_writeable_reg, > + .volatile_reg = ina2xx_is_volatile_reg, > +}; > + > +enum ina2xx_ids { ina219, ina226 }; > + > +struct ina2xx_config { > + u16 config_default; > + int calibration_factor; > + int shunt_div; > + int bus_voltage_shift; > + int bus_voltage_lsb; /* uV */ > + int power_lsb; /* uW */ > +}; > + > +struct ina2xx_chip_info { > + struct regmap *regmap; > + struct task_struct *task; > + const struct ina2xx_config *config; > + struct mutex state_lock; > + long rshunt; > + int avg; > + s64 prev_ns; /* track buffer capture time, check for underruns*/ > + int int_time_vbus; /* Bus voltage integration time uS */ > + int int_time_vshunt; /* Shunt voltage integration time uS */ > +}; > + > +static const struct ina2xx_config ina2xx_config[] = { > + [ina219] = { > + .config_default = INA219_CONFIG_DEFAULT, > + .calibration_factor = 40960000, > + .shunt_div = 100, > + .bus_voltage_shift = 3, > + .bus_voltage_lsb = 4000, > + .power_lsb = 20000, > + }, > + [ina226] = { > + .config_default = INA226_CONFIG_DEFAULT, > + .calibration_factor = 5120000, > + .shunt_div = 400, > + .bus_voltage_shift = 0, > + .bus_voltage_lsb = 1250, > + .power_lsb = 25000, > + }, > +}; > + > +static int ina2xx_get_value(struct ina2xx_chip_info *chip, u8 reg, > + unsigned int regval, int *val, int *uval) > +{ > + *val = 0; > + > + switch (reg) { > + case INA2XX_SHUNT_VOLTAGE: > + /* signed register */ > + *uval = DIV_ROUND_CLOSEST((s16) regval, > + chip->config->shunt_div); > + return IIO_VAL_INT_PLUS_MICRO; > + > + case INA2XX_BUS_VOLTAGE: > + *uval = (regval >> chip->config->bus_voltage_shift) > + * chip->config->bus_voltage_lsb; > + *val = *uval / 1000000; > + *uval = *uval % 1000000; > + return IIO_VAL_INT_PLUS_MICRO; > + > + case INA2XX_POWER: > + *uval = regval * chip->config->power_lsb; > + *val = *uval / 1000000; > + *uval = *uval % 1000000; > + return IIO_VAL_INT_PLUS_MICRO; > + > + case INA2XX_CURRENT: > + /* signed register, LSB=1mA (selected), in mA */ > + *uval = (s16) regval * 1000; > + return IIO_VAL_INT_PLUS_MICRO; > + > + default: > + /* programmer goofed */ > + WARN_ON_ONCE(1); > + } > + return -EINVAL; > +} > + > +static int ina2xx_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int *val, int *val2, long mask) > +{ > + int ret; > + struct ina2xx_chip_info *chip = iio_priv(indio_dev); > + unsigned int regval; > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + ret = regmap_read(chip->regmap, chan->address, ®val); > + if (ret < 0) > + return ret; > + > + return ina2xx_get_value(chip, chan->address, regval, val, val2); > + > + case IIO_CHAN_INFO_OVERSAMPLING_RATIO: > + *val = chip->avg; > + return IIO_VAL_INT; > + > + case IIO_CHAN_INFO_INT_TIME: > + *val = 0; > + if (chan->address == INA2XX_SHUNT_VOLTAGE) > + *val2 = chip->int_time_vshunt; > + else > + *val2 = chip->int_time_vbus; > + > + return IIO_VAL_INT_PLUS_MICRO; > + > + case IIO_CHAN_INFO_SAMP_FREQ: > + /* > + * Sample freq is read only, it is a consequence of > + * 1/AVG*(CT_bus+CT_shunt). > + */ > + *val = DIV_ROUND_CLOSEST(1000000, SAMPLING_PERIOD(chip)); > + > + return IIO_VAL_INT; > + > + default: > + return -EINVAL; > + } > + > + return 0; > +} > + > +/* > + * Available averaging rates for ina226. The indices correspond with > + * the bit values expected by the chip (according to the ina226 datasheet, > + * table 3 AVG bit settings, found at > + * http://www.ti.com/lit/ds/symlink/ina226.pdf. > + */ > +static const int ina226_avg_tab[] = { 1, 4, 16, 64, 128, 256, 512, 1024 }; > + > +static int ina226_set_average(struct ina2xx_chip_info *chip, unsigned int val, > + unsigned int *config) > +{ > + int bits; > + > + if (val > 1024 || val < 1) > + return -EINVAL; > + > + bits = find_closest(val, ina226_avg_tab, > + ARRAY_SIZE(ina226_avg_tab)); > + > + chip->avg = ina226_avg_tab[bits]; > + > + *config &= ~INA226_AVG_MASK; > + *config |= INA226_SHIFT_AVG(bits) & INA226_AVG_MASK; > + > + return 0; > +} > + > +/* Conversion times in uS */ > +static const int ina226_conv_time_tab[] = { 140, 204, 332, 588, 1100, > + 2116, 4156, 8244 }; > + > +static int ina226_set_int_time_vbus(struct ina2xx_chip_info *chip, > + unsigned int val_us, unsigned int *config) > +{ > + int bits; > + > + if (val_us > 8244 || val_us < 140) > + return -EINVAL; > + > + bits = find_closest(val_us, ina226_conv_time_tab, > + ARRAY_SIZE(ina226_conv_time_tab)); > + > + chip->int_time_vbus = ina226_conv_time_tab[bits]; > + > + *config &= ~INA226_ITB_MASK; > + *config |= INA226_SHIFT_ITB(bits) & INA226_ITB_MASK; > + > + return 0; > +} > + > +static int ina226_set_int_time_vshunt(struct ina2xx_chip_info *chip, > + unsigned int val_us, unsigned int *config) > +{ > + int bits; > + > + if (val_us > 8244 || val_us < 140) > + return -EINVAL; > + > + bits = find_closest(val_us, ina226_conv_time_tab, > + ARRAY_SIZE(ina226_conv_time_tab)); > + > + chip->int_time_vshunt = ina226_conv_time_tab[bits]; > + > + *config &= ~INA226_ITS_MASK; > + *config |= INA226_SHIFT_ITS(bits) & INA226_ITS_MASK; > + > + return 0; > +} > + > +static int ina2xx_write_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int val, int val2, long mask) > +{ > + struct ina2xx_chip_info *chip = iio_priv(indio_dev); > + int ret; > + unsigned int config, tmp; > + > + if (iio_buffer_enabled(indio_dev)) > + return -EBUSY; > + > + mutex_lock(&chip->state_lock); > + > + ret = regmap_read(chip->regmap, INA2XX_CONFIG, &config); > + if (ret < 0) > + goto _err; > + > + tmp = config; > + > + switch (mask) { > + case IIO_CHAN_INFO_OVERSAMPLING_RATIO: > + ret = ina226_set_average(chip, val, &tmp); > + break; > + > + case IIO_CHAN_INFO_INT_TIME: > + if (chan->address == INA2XX_SHUNT_VOLTAGE) > + ret = ina226_set_int_time_vshunt(chip, val2, &tmp); > + else > + ret = ina226_set_int_time_vbus(chip, val2, &tmp); > + break; > + default: > + ret = -EINVAL; > + } > + > + if (!ret && (tmp != config)) > + ret = regmap_write(chip->regmap, INA2XX_CONFIG, tmp); > +_err: > + mutex_unlock(&chip->state_lock); > + > + return ret; > +} > + > + > +#define INA2XX_CHAN(_type, _index, _address) { \ > + .type = (_type), \ > + .address = (_address), \ > + .indexed = 1, \ > + .channel = (_index), \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ > + .info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ > + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ > + .scan_index = (_index), \ > + .scan_type = { \ > + .sign = 'u', \ > + .realbits = 16, \ > + .storagebits = 16, \ > + .endianness = IIO_BE, \ > + } \ > +} > + > +/* > + * Sampling Freq is a consequence of the integration times of > + * the Voltage channels. > + */ > +#define INA2XX_CHAN_VOLTAGE(_index, _address) { \ > + .type = IIO_VOLTAGE, \ > + .address = (_address), \ > + .indexed = 1, \ > + .channel = (_index), \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ > + BIT(IIO_CHAN_INFO_INT_TIME), \ > + .scan_index = (_index), \ > + .scan_type = { \ > + .sign = 'u', \ > + .realbits = 16, \ > + .storagebits = 16, \ > + .endianness = IIO_BE, \ > + } \ > +} > + > +static const struct iio_chan_spec ina2xx_channels[] = { > + INA2XX_CHAN_VOLTAGE(0, INA2XX_SHUNT_VOLTAGE), > + INA2XX_CHAN_VOLTAGE(1, INA2XX_BUS_VOLTAGE), > + INA2XX_CHAN(IIO_CURRENT, 2, INA2XX_CURRENT), > + INA2XX_CHAN(IIO_POWER, 3, INA2XX_POWER), > + IIO_CHAN_SOFT_TIMESTAMP(4), > +}; > + > +static int ina2xx_work_buffer(struct iio_dev *indio_dev) > +{ > + struct ina2xx_chip_info *chip = iio_priv(indio_dev); > + unsigned short data[8]; > + int bit, ret, i = 0; > + unsigned long buffer_us, elapsed_us; > + s64 time_a, time_b; > + unsigned int alert; > + > + time_a = iio_get_time_ns(); > + > + /* > + * Because the timer thread and the chip conversion clock > + * are asynchronous, the period difference will eventually > + * result in reading V[k-1] again, or skip V[k] at time Tk. > + * In order to resync the timer with the conversion process > + * we check the ConVersionReadyFlag. > + * On hardware that supports using the ALERT pin to toggle a > + * GPIO a triggered buffer could be used instead. > + * For now, we pay for that extra read of the ALERT register > + */ > + do { > + ret = regmap_read(chip->regmap, INA226_ALERT_MASK, > + &alert); > + if (ret < 0) > + return ret; > + > + alert &= INA266_CVRF; > + trace_printk("Conversion ready: %d\n", !!alert); > + > + } while (!alert); > + > + /* > + * Single register reads: bulk_read will not work with ina226 > + * as there is no auto-increment of the address register for > + * data length longer than 16bits. > + */ > + for_each_set_bit(bit, indio_dev->active_scan_mask, > + indio_dev->masklength) { > + unsigned int val; > + > + ret = regmap_read(chip->regmap, > + INA2XX_SHUNT_VOLTAGE + bit, &val); > + if (ret < 0) > + return ret; > + > + data[i++] = val; > + } > + > + time_b = iio_get_time_ns(); > + > + iio_push_to_buffers_with_timestamp(indio_dev, > + (unsigned int *)data, time_a); > + > + buffer_us = (unsigned long)(time_b - time_a) / 1000; > + elapsed_us = (unsigned long)(time_a - chip->prev_ns) / 1000; > + > + trace_printk("uS: elapsed: %lu, buf: %lu\n", elapsed_us, buffer_us); > + > + chip->prev_ns = time_a; > + > + return buffer_us; > +}; > + > +static int ina2xx_capture_thread(void *data) > +{ > + struct iio_dev *indio_dev = (struct iio_dev *)data; > + struct ina2xx_chip_info *chip = iio_priv(indio_dev); > + unsigned int sampling_us = SAMPLING_PERIOD(chip); > + int buffer_us; > + > + /* > + * Poll a bit faster than the chip internal Fs, in case > + * we wish to sync with the conversion ready flag. > + */ > + sampling_us -= 200; > + > + do { > + buffer_us = ina2xx_work_buffer(indio_dev); > + if (buffer_us < 0) > + return buffer_us; > + > + if (sampling_us > buffer_us) > + udelay(sampling_us - buffer_us); > + > + } while (!kthread_should_stop()); > + > + return 0; > +} > + > +int ina2xx_buffer_enable(struct iio_dev *indio_dev) > +{ > + struct ina2xx_chip_info *chip = iio_priv(indio_dev); > + unsigned int sampling_us = SAMPLING_PERIOD(chip); > + > + trace_printk("Enabling buffer w/ scan_mask %02x, freq = %d, avg =%u\n", > + (unsigned int)(*indio_dev->active_scan_mask), > + 1000000/sampling_us, chip->avg); > + > + trace_printk("Expected work period: %u us\n", sampling_us); > + > + chip->prev_ns = iio_get_time_ns(); > + > + chip->task = kthread_run(ina2xx_capture_thread, (void *)indio_dev, > + "ina2xx-%uus", sampling_us); > + > + return PTR_ERR_OR_ZERO(chip->task); > +} > + > +int ina2xx_buffer_disable(struct iio_dev *indio_dev) > +{ > + struct ina2xx_chip_info *chip = iio_priv(indio_dev); > + > + if (chip->task) { > + kthread_stop(chip->task); > + chip->task = NULL; > + } > + > + return 0; > +} > + > +static const struct iio_buffer_setup_ops ina2xx_setup_ops = { > + .postenable = &ina2xx_buffer_enable, > + .postdisable = &ina2xx_buffer_disable, Sorry, only just noticed this. The postenable pairs with predisable (inside and outside the state change for the two pairs). I might just fix this up when applying (should be predisable) > +}; > + > +static int ina2xx_debug_reg(struct iio_dev *indio_dev, > + unsigned reg, unsigned writeval, unsigned *readval) > +{ > + struct ina2xx_chip_info *chip = iio_priv(indio_dev); > + > + if (!readval) > + return regmap_write(chip->regmap, reg, writeval); > + > + return regmap_read(chip->regmap, reg, readval); > +} > + > +/* Possible integration times for vshunt and vbus */ > +static IIO_CONST_ATTR_INT_TIME_AVAIL \ > + ("0.000140 0.000204 0.000332 0.000588 0.001100 0.002116 0.004156 0.008244"); > + > +static struct attribute *ina2xx_attributes[] = { > + &iio_const_attr_integration_time_available.dev_attr.attr, > + NULL, > +}; > + > +static const struct attribute_group ina2xx_attribute_group = { > + .attrs = ina2xx_attributes, > +}; > + > +static const struct iio_info ina2xx_info = { > + .debugfs_reg_access = &ina2xx_debug_reg, > + .read_raw = &ina2xx_read_raw, > + .write_raw = &ina2xx_write_raw, > + .attrs = &ina2xx_attribute_group, > + .driver_module = THIS_MODULE, > +}; > + > +/* Initialize the configuration and calibration registers. */ > +static int ina2xx_init(struct ina2xx_chip_info *chip, unsigned int config) > +{ > + u16 regval; > + int ret = regmap_write(chip->regmap, INA2XX_CONFIG, config); > + > + if (ret < 0) > + return ret; > + /* > + * Set current LSB to 1mA, shunt is in uOhms > + * (equation 13 in datasheet). We hardcode a Current_LSB > + * of 1.0 x10-6. The only remaining parameter is RShunt. > + * There is no need to expose the CALIBRATION register > + * to the user for now. > + */ > + regval = DIV_ROUND_CLOSEST(chip->config->calibration_factor, > + chip->rshunt); > + > + return regmap_write(chip->regmap, INA2XX_CALIBRATION, regval); > +} > + > +static int ina2xx_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct ina2xx_chip_info *chip; > + struct iio_dev *indio_dev; > + struct iio_buffer *buffer; > + int ret; > + unsigned int val; > + > + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); > + if (!indio_dev) > + return -ENOMEM; > + > + chip = iio_priv(indio_dev); > + > + chip->config = &ina2xx_config[id->driver_data]; > + > + if (of_property_read_u32(client->dev.of_node, > + "shunt-resistor", &val) < 0) { > + struct ina2xx_platform_data *pdata = > + dev_get_platdata(&client->dev); > + > + if (pdata) > + val = pdata->shunt_uohms; > + else > + val = INA2XX_RSHUNT_DEFAULT; > + } > + > + if (val <= 0 || val > chip->config->calibration_factor) > + return -ENODEV; > + > + chip->rshunt = val; > + > + mutex_init(&chip->state_lock); > + > + /* This is only used for device removal purposes. */ > + i2c_set_clientdata(client, indio_dev); > + > + indio_dev->name = id->name; > + indio_dev->channels = ina2xx_channels; > + indio_dev->num_channels = ARRAY_SIZE(ina2xx_channels); > + > + indio_dev->dev.parent = &client->dev; > + indio_dev->info = &ina2xx_info; > + indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE; > + > + chip->regmap = devm_regmap_init_i2c(client, &ina2xx_regmap_config); > + if (IS_ERR(chip->regmap)) { > + dev_err(&client->dev, "failed to allocate register map\n"); > + return PTR_ERR(chip->regmap); > + } > + > + /* Patch the current config register with default. */ > + val = chip->config->config_default; > + > + if (id->driver_data == ina226) { > + ina226_set_average(chip, INA226_DEFAULT_AVG, &val); > + ina226_set_int_time_vbus(chip, INA226_DEFAULT_IT, &val); > + ina226_set_int_time_vshunt(chip, INA226_DEFAULT_IT, &val); > + } > + > + ret = ina2xx_init(chip, val); > + if (ret < 0) { > + dev_err(&client->dev, "error configuring the device: %d\n", > + ret); > + return -ENODEV; > + } > + > + buffer = devm_iio_kfifo_allocate(&indio_dev->dev); > + if (!buffer) > + return -ENOMEM; > + > + indio_dev->setup_ops = &ina2xx_setup_ops; > + > + iio_device_attach_buffer(indio_dev, buffer); > + > + return iio_device_register(indio_dev); > +} > + > + > +static int ina2xx_remove(struct i2c_client *client) > +{ > + struct iio_dev *indio_dev = i2c_get_clientdata(client); > + struct ina2xx_chip_info *chip = iio_priv(indio_dev); > + > + iio_device_unregister(indio_dev); > + > + /* Powerdown */ > + return regmap_update_bits(chip->regmap, INA2XX_CONFIG, > + INA2XX_MODE_MASK, 0); > +} > + > + > +static const struct i2c_device_id ina2xx_id[] = { > + {"ina219", ina219}, > + {"ina220", ina219}, > + {"ina226", ina226}, > + {"ina230", ina226}, > + {"ina231", ina226}, > + {} > +}; > + > +MODULE_DEVICE_TABLE(i2c, ina2xx_id); > + > +static struct i2c_driver ina2xx_driver = { > + .driver = { > + .name = KBUILD_MODNAME, > + }, > + .probe = ina2xx_probe, > + .remove = ina2xx_remove, > + .id_table = ina2xx_id, > +}; > + > +module_i2c_driver(ina2xx_driver); > + > +MODULE_AUTHOR("Marc Titinger <marc.titinger@xxxxxxxxxxxx>"); > +MODULE_DESCRIPTION("Texas Instruments INA2XX ADC driver"); > +MODULE_LICENSE("GPL v2"); > -- 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
