| Message ID | 20170922201226.23721-1-Ismail.Kose@maximintegrated.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, 22 Sep 2017 13:12:08 -0700 "Ismail H. Kose" <Ismail.Kose@maximintegrated.com> wrote: > This patch provides an iio device driver for DS4422/DS4424 chips that support > two/four channel 7-bit Sink/Source Current DAC. > > Signed-off-by: Ismail H. Kose <Ismail.Kose@maximintegrated.com> > Signed-off-by: Ismail H. Kose <ihkose@gmail.com> A few minor comments inline. This is coming together nicely. Jonathan > --- > v6: > * Removed reference resistor parsing > v5: > * Removed unused variable > v4: > * Removed unnecessary code and space optimization > * Alphabetic order in Kconfig and Makefile > v3: > * Removed iio-map and platform file support > * Removed ds4424.h file > * Fixed ADC value read bug > * Removed confused comments > * Added device tree binding file > * Fixed bugs in probe and read function > v2: > * Fixed coding style and removed unncessary code > * Removed min/max rfs, ifs-scale, etc values from device tree > * Removed unused code, definitions and some comments > * Removed regulator control and made standard structure > * Removed data processing and channel scale > * Removed device tree binding file > > drivers/iio/dac/Kconfig | 9 ++ > drivers/iio/dac/Makefile | 1 + > drivers/iio/dac/ds4424.c | 340 +++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 350 insertions(+) > create mode 100644 drivers/iio/dac/ds4424.c > > diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig > index 25bed2d7d2b9..57c179830981 100644 > --- a/drivers/iio/dac/Kconfig > +++ b/drivers/iio/dac/Kconfig > @@ -211,6 +211,15 @@ config AD8801 > To compile this driver as a module choose M here: the module will be called > ad8801. > > +config DS4424 > + tristate "Maxim Integrated DS4422/DS4424 DAC driver" > + depends on I2C > + help > + If you say yes here you get support for Maxim chips DS4422, DS4424. > + > + This driver can also be built as a module. If so, the module > + will be called ds4424. > + > config DPOT_DAC > tristate "DAC emulation using a DPOT" > depends on OF > diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile > index 603587cc2f07..abf5c3094454 100644 > --- a/drivers/iio/dac/Makefile > +++ b/drivers/iio/dac/Makefile > @@ -22,6 +22,7 @@ obj-$(CONFIG_AD5686) += ad5686.o > obj-$(CONFIG_AD7303) += ad7303.o > obj-$(CONFIG_AD8801) += ad8801.o > obj-$(CONFIG_CIO_DAC) += cio-dac.o > +obj-$(CONFIG_DS4424) += ds4424.o > obj-$(CONFIG_DPOT_DAC) += dpot-dac.o > obj-$(CONFIG_LPC18XX_DAC) += lpc18xx_dac.o > obj-$(CONFIG_LTC2632) += ltc2632.o > diff --git a/drivers/iio/dac/ds4424.c b/drivers/iio/dac/ds4424.c > new file mode 100644 > index 000000000000..aea0cd12f9b8 > --- /dev/null > +++ b/drivers/iio/dac/ds4424.c > @@ -0,0 +1,340 @@ > +/* > + * Maxim Integrated > + * 7-bit, Multi-Channel Sink/Source Current DAC Driver > + * Copyright (C) 2017 Maxim Integrated > + * > + * 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. > + */ > + > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/i2c.h> > +#include <linux/regulator/consumer.h> > +#include <linux/err.h> > +#include <linux/delay.h> > +#include <linux/iio/iio.h> > +#include <linux/iio/driver.h> > +#include <linux/iio/machine.h> > +#include <linux/iio/consumer.h> > + > +#define DS4422_MAX_DAC_CHANNELS 2 > +#define DS4424_MAX_DAC_CHANNELS 4 > + > +#define DS4424_DAC_ADDR(chan) ((chan) + 0xf8) > +#define DS4424_SOURCE_I 1 > +#define DS4424_SINK_I 0 > + > +#define DS4424_CHANNEL(chan) { \ > + .type = IIO_CURRENT, \ > + .indexed = 1, \ > + .output = 1, \ > + .channel = chan, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ > +} > + > +/* > + * DS4424 DAC control register 8 bits > + * [7] 0: to sink; 1: to source > + * [6:0] steps to sink/source > + * bit[7] looks like a sign bit, but the value of the register is > + * not a two's complement code considering the bit[6:0] is a absolute > + * distance from the zero point. > + */ > +union ds4424_raw_data { > + struct { > + u8 dx:7; > + u8 source_bit:1; > + }; > + u8 bits; > +}; > + > +enum ds4424_device_ids { > + ID_DS4422, > + ID_DS4424, > +}; > + > +struct ds4424_data { > + struct i2c_client *client; > + struct mutex lock; > + __maybe_unused uint8_t save[DS4424_MAX_DAC_CHANNELS]; > + struct regulator *vcc_reg; > + uint8_t raw[DS4424_MAX_DAC_CHANNELS]; > +}; > + > +static const struct iio_chan_spec ds4424_channels[] = { > + DS4424_CHANNEL(0), > + DS4424_CHANNEL(1), > + DS4424_CHANNEL(2), > + DS4424_CHANNEL(3), > +}; > + > +static int ds4424_get_value(struct iio_dev *indio_dev, > + int *val, int channel) > +{ > + struct ds4424_data *data = iio_priv(indio_dev); > + int ret; > + > + mutex_lock(&data->lock); > + ret = i2c_smbus_read_byte_data(data->client, DS4424_DAC_ADDR(channel)); > + if (ret < 0) > + goto fail; > + > + *val = ret; > + mutex_unlock(&data->lock); > + return 0; Lose previous two lines and use the logic in the error path. > + > +fail: > + mutex_unlock(&data->lock); > + return ret; > +} > + > +static int ds4424_set_value(struct iio_dev *indio_dev, > + int val, struct iio_chan_spec const *chan) > +{ > + struct ds4424_data *data = iio_priv(indio_dev); > + int ret; > + > + mutex_lock(&data->lock); > + ret = i2c_smbus_write_byte_data(data->client, > + DS4424_DAC_ADDR(chan->channel), val); > + if (ret < 0) { > + mutex_unlock(&data->lock); A goto unlock: would be slightly cleaner. > + return ret; > + } > + > + data->raw[chan->channel] = val; > + mutex_unlock(&data->lock); > + > + return 0; > +} > + > +static int ds4424_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int *val, int *val2, long mask) > +{ > + union ds4424_raw_data raw; > + int ret; > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + ret = ds4424_get_value(indio_dev, val, chan->channel); > + if (ret < 0) { > + pr_err("%s : ds4424_get_value returned %d\n", > + __func__, ret); > + return ret; > + } > + raw.bits = *val; > + *val = raw.dx; > + if (raw.source_bit == DS4424_SINK_I) > + *val = -*val; > + return IIO_VAL_INT; > + > + default: > + return -EINVAL; > + } > +} > + > +static int ds4424_write_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int val, int val2, long mask) > +{ > + union ds4424_raw_data raw; > + > + if (val2 != 0) > + return -EINVAL; > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + if (val < S8_MIN || val > S8_MAX) > + return -EINVAL; > + > + if (val > 0) { > + raw.source_bit = DS4424_SOURCE_I; > + raw.dx = val; > + } else { > + raw.source_bit = DS4424_SINK_I; > + raw.dx = -val; > + } > + > + return ds4424_set_value(indio_dev, raw.bits, chan); > + > + default: > + return -EINVAL; > + } > +} > + > +static int ds4424_verify_chip(struct iio_dev *indio_dev) > +{ > + int ret, val; > + > + ret = ds4424_get_value(indio_dev, &val, DS4424_DAC_ADDR(0)); > + if (ret < 0) > + dev_err(&indio_dev->dev, > + "%s failed. ret: %d\n", __func__, ret); > + > + return ret; > +} > + > +static int __maybe_unused ds4424_suspend(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct iio_dev *indio_dev = i2c_get_clientdata(client); > + struct ds4424_data *data = iio_priv(indio_dev); > + int ret = 0; > + int i; > + > + for (i = 0; i < indio_dev->num_channels; i++) { > + data->save[i] = data->raw[i]; > + ret = ds4424_set_value(indio_dev, 0, > + &indio_dev->channels[i]); > + if (ret < 0) > + return ret; > + } > + return ret; > +} > + > +static int __maybe_unused ds4424_resume(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct iio_dev *indio_dev = i2c_get_clientdata(client); > + struct ds4424_data *data = iio_priv(indio_dev); > + int ret = 0; > + int i; > + > + for (i = 0; i < indio_dev->num_channels; i++) { > + ret = ds4424_set_value(indio_dev, data->save[i], > + &indio_dev->channels[i]); > + if (ret < 0) > + return ret; > + } > + return ret; > +} > + > +static SIMPLE_DEV_PM_OPS(ds4424_pm_ops, ds4424_suspend, ds4424_resume); > + > +static const struct iio_info ds4424_info = { > + .read_raw = ds4424_read_raw, > + .write_raw = ds4424_write_raw, > +}; > + > +static int ds4424_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct ds4424_data *data; > + struct iio_dev *indio_dev; > + int ret; > + > + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); > + if (!indio_dev) { > + dev_err(&client->dev, "iio dev alloc failed.\n"); > + return -ENOMEM; > + } > + > + data = iio_priv(indio_dev); > + i2c_set_clientdata(client, indio_dev); > + data->client = client; > + indio_dev->name = id->name; > + indio_dev->dev.of_node = client->dev.of_node; > + indio_dev->dev.parent = &client->dev; > + > + if (!client->dev.of_node) { > + dev_err(&client->dev, > + "Not found DT.\n"); > + return -EPERM; Slightly odd error. -ENODEV probably makes more sense... > + } > + > + data->vcc_reg = devm_regulator_get(&client->dev, "vcc"); > + if (IS_ERR(data->vcc_reg)) { > + ret = PTR_ERR(data->vcc_reg); > + dev_err(&client->dev, > + "Failed to get vcc-supply regulator: %d\n", ret); > + return ret; return PTR_ERR(data->vcc_reg); > + } > + > + mutex_init(&data->lock); > + ret = regulator_enable(data->vcc_reg); > + if (ret < 0) { > + dev_err(&client->dev, > + "Unable to enable the regulator.\n"); > + return ret; > + } > + > + usleep_range(1000, 1200); > + ret = ds4424_verify_chip(indio_dev); > + if (ret < 0) regulator disable? Easier if you do a goto block at the end for any error handling which is not a valid direct return (see below). > + return -ENXIO; > + > + switch (id->driver_data) { > + case ID_DS4422: > + indio_dev->num_channels = DS4422_MAX_DAC_CHANNELS; > + break; > + case ID_DS4424: > + indio_dev->num_channels = DS4424_MAX_DAC_CHANNELS; > + break; > + default: > + dev_err(&client->dev, > + "ds4424: Invalid chip id.\n"); > + regulator_disable(data->vcc_reg); Given you have multiple error paths where regulator_disable is needed, I would prefer this done as a goto with the error handling laid out at the end of this function rather than mutiple copies inline. > + return -ENXIO; > + } > + > + indio_dev->channels = ds4424_channels; > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->info = &ds4424_info; > + > + ret = iio_device_register(indio_dev); > + if (ret < 0) { > + dev_err(&client->dev, > + "iio_device_register failed. ret: %d\n", ret); > + regulator_disable(data->vcc_reg); > + } > + > + return ret; > +} > + > +static int ds4424_remove(struct i2c_client *client) > +{ > + struct iio_dev *indio_dev = i2c_get_clientdata(client); > + struct ds4424_data *data = iio_priv(indio_dev); > + > + iio_device_unregister(indio_dev); > + regulator_disable(data->vcc_reg); > + > + return 0; > +} > + > +static const struct i2c_device_id ds4424_id[] = { > + { "ds4422", ID_DS4422 }, > + { "ds4424", ID_DS4424 }, > + { } > +}; > + > +MODULE_DEVICE_TABLE(i2c, ds4424_id); > + > +static const struct of_device_id ds4424_of_match[] = { > + { .compatible = "maxim,ds4422" }, > + { .compatible = "maxim,ds4424" }, > + { }, > +}; > + > +MODULE_DEVICE_TABLE(of, ds4424_of_match); > + > +static struct i2c_driver ds4424_driver = { > + .driver = { > + .name = "ds4424", > + .of_match_table = ds4424_of_match, > + .pm = &ds4424_pm_ops, > + }, > + .probe = ds4424_probe, > + .remove = ds4424_remove, > + .id_table = ds4424_id, > +}; > +module_i2c_driver(ds4424_driver); > + > +MODULE_DESCRIPTION("Maxim DS4424 DAC Driver"); > +MODULE_AUTHOR("Ismail H. Kose <ismail.kose@maximintegrated.com>"); > +MODULE_AUTHOR("Vishal Sood <vishal.sood@maximintegrated.com>"); > +MODULE_AUTHOR("David Jung <david.jung@maximintegrated.com>"); > +MODULE_LICENSE("GPL v2"); -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index 25bed2d7d2b9..57c179830981 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -211,6 +211,15 @@ config AD8801 To compile this driver as a module choose M here: the module will be called ad8801. +config DS4424 + tristate "Maxim Integrated DS4422/DS4424 DAC driver" + depends on I2C + help + If you say yes here you get support for Maxim chips DS4422, DS4424. + + This driver can also be built as a module. If so, the module + will be called ds4424. + config DPOT_DAC tristate "DAC emulation using a DPOT" depends on OF diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index 603587cc2f07..abf5c3094454 100644 --- a/drivers/iio/dac/Makefile +++ b/drivers/iio/dac/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_AD5686) += ad5686.o obj-$(CONFIG_AD7303) += ad7303.o obj-$(CONFIG_AD8801) += ad8801.o obj-$(CONFIG_CIO_DAC) += cio-dac.o +obj-$(CONFIG_DS4424) += ds4424.o obj-$(CONFIG_DPOT_DAC) += dpot-dac.o obj-$(CONFIG_LPC18XX_DAC) += lpc18xx_dac.o obj-$(CONFIG_LTC2632) += ltc2632.o diff --git a/drivers/iio/dac/ds4424.c b/drivers/iio/dac/ds4424.c new file mode 100644 index 000000000000..aea0cd12f9b8 --- /dev/null +++ b/drivers/iio/dac/ds4424.c @@ -0,0 +1,340 @@ +/* + * Maxim Integrated + * 7-bit, Multi-Channel Sink/Source Current DAC Driver + * Copyright (C) 2017 Maxim Integrated + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/iio/iio.h> +#include <linux/iio/driver.h> +#include <linux/iio/machine.h> +#include <linux/iio/consumer.h> + +#define DS4422_MAX_DAC_CHANNELS 2 +#define DS4424_MAX_DAC_CHANNELS 4 + +#define DS4424_DAC_ADDR(chan) ((chan) + 0xf8) +#define DS4424_SOURCE_I 1 +#define DS4424_SINK_I 0 + +#define DS4424_CHANNEL(chan) { \ + .type = IIO_CURRENT, \ + .indexed = 1, \ + .output = 1, \ + .channel = chan, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ +} + +/* + * DS4424 DAC control register 8 bits + * [7] 0: to sink; 1: to source + * [6:0] steps to sink/source + * bit[7] looks like a sign bit, but the value of the register is + * not a two's complement code considering the bit[6:0] is a absolute + * distance from the zero point. + */ +union ds4424_raw_data { + struct { + u8 dx:7; + u8 source_bit:1; + }; + u8 bits; +}; + +enum ds4424_device_ids { + ID_DS4422, + ID_DS4424, +}; + +struct ds4424_data { + struct i2c_client *client; + struct mutex lock; + __maybe_unused uint8_t save[DS4424_MAX_DAC_CHANNELS]; + struct regulator *vcc_reg; + uint8_t raw[DS4424_MAX_DAC_CHANNELS]; +}; + +static const struct iio_chan_spec ds4424_channels[] = { + DS4424_CHANNEL(0), + DS4424_CHANNEL(1), + DS4424_CHANNEL(2), + DS4424_CHANNEL(3), +}; + +static int ds4424_get_value(struct iio_dev *indio_dev, + int *val, int channel) +{ + struct ds4424_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->lock); + ret = i2c_smbus_read_byte_data(data->client, DS4424_DAC_ADDR(channel)); + if (ret < 0) + goto fail; + + *val = ret; + mutex_unlock(&data->lock); + return 0; + +fail: + mutex_unlock(&data->lock); + return ret; +} + +static int ds4424_set_value(struct iio_dev *indio_dev, + int val, struct iio_chan_spec const *chan) +{ + struct ds4424_data *data = iio_priv(indio_dev); + int ret; + + mutex_lock(&data->lock); + ret = i2c_smbus_write_byte_data(data->client, + DS4424_DAC_ADDR(chan->channel), val); + if (ret < 0) { + mutex_unlock(&data->lock); + return ret; + } + + data->raw[chan->channel] = val; + mutex_unlock(&data->lock); + + return 0; +} + +static int ds4424_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + union ds4424_raw_data raw; + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = ds4424_get_value(indio_dev, val, chan->channel); + if (ret < 0) { + pr_err("%s : ds4424_get_value returned %d\n", + __func__, ret); + return ret; + } + raw.bits = *val; + *val = raw.dx; + if (raw.source_bit == DS4424_SINK_I) + *val = -*val; + return IIO_VAL_INT; + + default: + return -EINVAL; + } +} + +static int ds4424_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + union ds4424_raw_data raw; + + if (val2 != 0) + return -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + if (val < S8_MIN || val > S8_MAX) + return -EINVAL; + + if (val > 0) { + raw.source_bit = DS4424_SOURCE_I; + raw.dx = val; + } else { + raw.source_bit = DS4424_SINK_I; + raw.dx = -val; + } + + return ds4424_set_value(indio_dev, raw.bits, chan); + + default: + return -EINVAL; + } +} + +static int ds4424_verify_chip(struct iio_dev *indio_dev) +{ + int ret, val; + + ret = ds4424_get_value(indio_dev, &val, DS4424_DAC_ADDR(0)); + if (ret < 0) + dev_err(&indio_dev->dev, + "%s failed. ret: %d\n", __func__, ret); + + return ret; +} + +static int __maybe_unused ds4424_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct ds4424_data *data = iio_priv(indio_dev); + int ret = 0; + int i; + + for (i = 0; i < indio_dev->num_channels; i++) { + data->save[i] = data->raw[i]; + ret = ds4424_set_value(indio_dev, 0, + &indio_dev->channels[i]); + if (ret < 0) + return ret; + } + return ret; +} + +static int __maybe_unused ds4424_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct ds4424_data *data = iio_priv(indio_dev); + int ret = 0; + int i; + + for (i = 0; i < indio_dev->num_channels; i++) { + ret = ds4424_set_value(indio_dev, data->save[i], + &indio_dev->channels[i]); + if (ret < 0) + return ret; + } + return ret; +} + +static SIMPLE_DEV_PM_OPS(ds4424_pm_ops, ds4424_suspend, ds4424_resume); + +static const struct iio_info ds4424_info = { + .read_raw = ds4424_read_raw, + .write_raw = ds4424_write_raw, +}; + +static int ds4424_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct ds4424_data *data; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) { + dev_err(&client->dev, "iio dev alloc failed.\n"); + return -ENOMEM; + } + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + indio_dev->name = id->name; + indio_dev->dev.of_node = client->dev.of_node; + indio_dev->dev.parent = &client->dev; + + if (!client->dev.of_node) { + dev_err(&client->dev, + "Not found DT.\n"); + return -EPERM; + } + + data->vcc_reg = devm_regulator_get(&client->dev, "vcc"); + if (IS_ERR(data->vcc_reg)) { + ret = PTR_ERR(data->vcc_reg); + dev_err(&client->dev, + "Failed to get vcc-supply regulator: %d\n", ret); + return ret; + } + + mutex_init(&data->lock); + ret = regulator_enable(data->vcc_reg); + if (ret < 0) { + dev_err(&client->dev, + "Unable to enable the regulator.\n"); + return ret; + } + + usleep_range(1000, 1200); + ret = ds4424_verify_chip(indio_dev); + if (ret < 0) + return -ENXIO; + + switch (id->driver_data) { + case ID_DS4422: + indio_dev->num_channels = DS4422_MAX_DAC_CHANNELS; + break; + case ID_DS4424: + indio_dev->num_channels = DS4424_MAX_DAC_CHANNELS; + break; + default: + dev_err(&client->dev, + "ds4424: Invalid chip id.\n"); + regulator_disable(data->vcc_reg); + return -ENXIO; + } + + indio_dev->channels = ds4424_channels; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &ds4424_info; + + ret = iio_device_register(indio_dev); + if (ret < 0) { + dev_err(&client->dev, + "iio_device_register failed. ret: %d\n", ret); + regulator_disable(data->vcc_reg); + } + + return ret; +} + +static int ds4424_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct ds4424_data *data = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + regulator_disable(data->vcc_reg); + + return 0; +} + +static const struct i2c_device_id ds4424_id[] = { + { "ds4422", ID_DS4422 }, + { "ds4424", ID_DS4424 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, ds4424_id); + +static const struct of_device_id ds4424_of_match[] = { + { .compatible = "maxim,ds4422" }, + { .compatible = "maxim,ds4424" }, + { }, +}; + +MODULE_DEVICE_TABLE(of, ds4424_of_match); + +static struct i2c_driver ds4424_driver = { + .driver = { + .name = "ds4424", + .of_match_table = ds4424_of_match, + .pm = &ds4424_pm_ops, + }, + .probe = ds4424_probe, + .remove = ds4424_remove, + .id_table = ds4424_id, +}; +module_i2c_driver(ds4424_driver); + +MODULE_DESCRIPTION("Maxim DS4424 DAC Driver"); +MODULE_AUTHOR("Ismail H. Kose <ismail.kose@maximintegrated.com>"); +MODULE_AUTHOR("Vishal Sood <vishal.sood@maximintegrated.com>"); +MODULE_AUTHOR("David Jung <david.jung@maximintegrated.com>"); +MODULE_LICENSE("GPL v2");