diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index 98b60581f1863a..64288ca8b2432d 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -129,16 +129,32 @@ config AD5624R_SPI AD5664R converters (DAC). This driver uses the common SPI interface. config AD5686 - tristate "Analog Devices AD5686R/AD5685R/AD5684R DAC SPI driver" + tristate + +config AD5686_SPI + tristate "Analog Devices AD5686 and similar multi-channel DACs (SPI)" depends on SPI + select AD5686 help - Say yes here to build support for Analog Devices AD5686R, AD5685R, - AD5684R, AD5791 Voltage Output Digital to - Analog Converter. + Say yes here to build support for Analog Devices AD5672R, AD5676, + AD5676R, AD5684, AD5684R, AD5684R, AD5685R, AD5686, AD5686R + Voltage Output Digital to Analog Converter. To compile this driver as a module, choose M here: the module will be called ad5686. +config AD5696_I2C + tristate "Analog Devices AD5696 and similar multi-channel DACs (I2C)" + depends on I2C + select AD5686 + help + Say yes here to build support for Analog Devices AD5671R, AD5675R, + AD5694, AD5694R, AD5695R, AD5696, AD5696R Voltage Output Digital to + Analog Converter. + + To compile this driver as a module, choose M here: the + module will be called ad5696. + config AD5755 tristate "Analog Devices AD5755/AD5755-1/AD5757/AD5735/AD5737 DAC driver" depends on SPI_MASTER diff --git a/drivers/iio/dac/ad5686-spi.c b/drivers/iio/dac/ad5686-spi.c new file mode 100644 index 00000000000000..d68579b05af3d5 --- /dev/null +++ b/drivers/iio/dac/ad5686-spi.c @@ -0,0 +1,93 @@ +/* + * AD5672R, AD5676, AD5676R, AD5684, AD5684R, AD5684R, AD5685R, AD5686, AD5686R + * Digital to analog converters driver + * + * Copyright 2018 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include "ad5686.h" + +#include +#include + +static int ad5686_spi_write(struct ad5686_state *st, + u8 cmd, u8 addr, u16 val) +{ + struct spi_device *spi = to_spi_device(st->dev); + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | + AD5686_ADDR(addr) | + val); + + return spi_write(spi, &st->data[0].d8[1], 3); +} + +static int ad5686_spi_read(struct ad5686_state *st, u8 addr) +{ + struct spi_transfer t[] = { + { + .tx_buf = &st->data[0].d8[1], + .len = 3, + .cs_change = 1, + }, { + .tx_buf = &st->data[1].d8[1], + .rx_buf = &st->data[2].d8[1], + .len = 3, + }, + }; + struct spi_device *spi = to_spi_device(st->dev); + int ret; + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) | + AD5686_ADDR(addr)); + st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); + + ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t)); + if (ret < 0) + return ret; + + return be32_to_cpu(st->data[2].d32); +} + +static int ad5686_spi_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + + return ad5686_probe(&spi->dev, id->driver_data, id->name, + ad5686_spi_write, ad5686_spi_read); +} + +static int ad5686_spi_remove(struct spi_device *spi) +{ + return ad5686_remove(&spi->dev); +} + +static const struct spi_device_id ad5686_spi_id[] = { + {"ad5672r", ID_AD5672R}, + {"ad5676", ID_AD5676}, + {"ad5676r", ID_AD5676R}, + {"ad5684", ID_AD5684}, + {"ad5684r", ID_AD5684R}, + {"ad5685r", ID_AD5685R}, + {"ad5686", ID_AD5686}, + {"ad5686r", ID_AD5686R}, + {} +}; +MODULE_DEVICE_TABLE(spi, ad5686_spi_id); + +static struct spi_driver ad5686_spi_driver = { + .driver = { + .name = "ad5686", + }, + .probe = ad5686_spi_probe, + .remove = ad5686_spi_remove, + .id_table = ad5686_spi_id, +}; + +module_spi_driver(ad5686_spi_driver); + +MODULE_AUTHOR("Stefan Popa "); +MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c index d1d8450c19f62a..c283e393704c82 100644 --- a/drivers/iio/dac/ad5686.c +++ b/drivers/iio/dac/ad5686.c @@ -11,7 +11,6 @@ #include #include #include -#include #include #include #include @@ -19,125 +18,30 @@ #include #include -#define AD5686_DAC_CHANNELS 4 - -#define AD5686_ADDR(x) ((x) << 16) -#define AD5686_CMD(x) ((x) << 20) - -#define AD5686_ADDR_DAC(chan) (0x1 << (chan)) -#define AD5686_ADDR_ALL_DAC 0xF - -#define AD5686_CMD_NOOP 0x0 -#define AD5686_CMD_WRITE_INPUT_N 0x1 -#define AD5686_CMD_UPDATE_DAC_N 0x2 -#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3 -#define AD5686_CMD_POWERDOWN_DAC 0x4 -#define AD5686_CMD_LDAC_MASK 0x5 -#define AD5686_CMD_RESET 0x6 -#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7 -#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8 -#define AD5686_CMD_READBACK_ENABLE 0x9 - -#define AD5686_LDAC_PWRDN_NONE 0x0 -#define AD5686_LDAC_PWRDN_1K 0x1 -#define AD5686_LDAC_PWRDN_100K 0x2 -#define AD5686_LDAC_PWRDN_3STATE 0x3 - -/** - * struct ad5686_chip_info - chip specific information - * @int_vref_mv: AD5620/40/60: the internal reference voltage - * @channel: channel specification -*/ - -struct ad5686_chip_info { - u16 int_vref_mv; - struct iio_chan_spec channel[AD5686_DAC_CHANNELS]; -}; - -/** - * struct ad5446_state - driver instance specific data - * @spi: spi_device - * @chip_info: chip model specific constants, available modes etc - * @reg: supply regulator - * @vref_mv: actual reference voltage used - * @pwr_down_mask: power down mask - * @pwr_down_mode: current power down mode - * @data: spi transfer buffers - */ +#include "ad5686.h" -struct ad5686_state { - struct spi_device *spi; - const struct ad5686_chip_info *chip_info; - struct regulator *reg; - unsigned short vref_mv; - unsigned pwr_down_mask; - unsigned pwr_down_mode; - /* - * DMA (thus cache coherency maintenance) requires the - * transfer buffers to live in their own cache lines. - */ - - union { - __be32 d32; - u8 d8[4]; - } data[3] ____cacheline_aligned; +static const char * const ad5686_powerdown_modes[] = { + "1kohm_to_gnd", + "100kohm_to_gnd", + "three_state" }; -/** - * ad5686_supported_device_ids: - */ - -enum ad5686_supported_device_ids { - ID_AD5684, - ID_AD5685, - ID_AD5686, -}; -static int ad5686_spi_write(struct ad5686_state *st, - u8 cmd, u8 addr, u16 val, u8 shift) +static int ad5686_write(struct ad5686_state *st, + u8 cmd, u8 addr, u16 val, u8 shift) { val <<= shift; - st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | - AD5686_ADDR(addr) | - val); - - return spi_write(st->spi, &st->data[0].d8[1], 3); + return st->write(st, cmd, addr, val); } -static int ad5686_spi_read(struct ad5686_state *st, u8 addr) +static int ad5686_read(struct ad5686_state *st, u8 addr) { - struct spi_transfer t[] = { - { - .tx_buf = &st->data[0].d8[1], - .len = 3, - .cs_change = 1, - }, { - .tx_buf = &st->data[1].d8[1], - .rx_buf = &st->data[2].d8[1], - .len = 3, - }, - }; - int ret; - - st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) | - AD5686_ADDR(addr)); - st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); - ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t)); - if (ret < 0) - return ret; - - return be32_to_cpu(st->data[2].d32); + return st->read(st, addr); } -static const char * const ad5686_powerdown_modes[] = { - "1kohm_to_gnd", - "100kohm_to_gnd", - "three_state" -}; - static int ad5686_get_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan) + const struct iio_chan_spec *chan) { struct ad5686_state *st = iio_priv(indio_dev); @@ -145,7 +49,7 @@ static int ad5686_get_powerdown_mode(struct iio_dev *indio_dev, } static int ad5686_set_powerdown_mode(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, unsigned int mode) + const struct iio_chan_spec *chan, unsigned int mode) { struct ad5686_state *st = iio_priv(indio_dev); @@ -163,17 +67,17 @@ static const struct iio_enum ad5686_powerdown_mode_enum = { }; static ssize_t ad5686_read_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, char *buf) + uintptr_t private, const struct iio_chan_spec *chan, char *buf) { struct ad5686_state *st = iio_priv(indio_dev); return sprintf(buf, "%d\n", !!(st->pwr_down_mask & - (0x3 << (chan->channel * 2)))); + (0x3 << (chan->channel * 2)))); } static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev, - uintptr_t private, const struct iio_chan_spec *chan, const char *buf, - size_t len) + uintptr_t private, const struct iio_chan_spec *chan, const char *buf, + size_t len) { bool readin; int ret; @@ -188,8 +92,8 @@ static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev, else st->pwr_down_mask &= ~(0x3 << (chan->channel * 2)); - ret = ad5686_spi_write(st, AD5686_CMD_POWERDOWN_DAC, 0, - st->pwr_down_mask & st->pwr_down_mode, 0); + ret = ad5686_write(st, AD5686_CMD_POWERDOWN_DAC, 0, + st->pwr_down_mask & st->pwr_down_mode, 0); return ret ? ret : len; } @@ -206,7 +110,7 @@ static int ad5686_read_raw(struct iio_dev *indio_dev, switch (m) { case IIO_CHAN_INFO_RAW: mutex_lock(&indio_dev->mlock); - ret = ad5686_spi_read(st, chan->address); + ret = ad5686_read(st, chan->address); mutex_unlock(&indio_dev->mlock); if (ret < 0) return ret; @@ -221,10 +125,10 @@ static int ad5686_read_raw(struct iio_dev *indio_dev, } static int ad5686_write_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int val, - int val2, - long mask) + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) { struct ad5686_state *st = iio_priv(indio_dev); int ret; @@ -235,11 +139,11 @@ static int ad5686_write_raw(struct iio_dev *indio_dev, return -EINVAL; mutex_lock(&indio_dev->mlock); - ret = ad5686_spi_write(st, - AD5686_CMD_WRITE_INPUT_N_UPDATE_N, - chan->address, - val, - chan->scan_type.shift); + ret = ad5686_write(st, + AD5686_CMD_WRITE_INPUT_N_UPDATE_N, + chan->address, + val, + chan->scan_type.shift); mutex_unlock(&indio_dev->mlock); break; default: @@ -267,14 +171,14 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = { { }, }; -#define AD5868_CHANNEL(chan, bits, _shift) { \ +#define AD5868_CHANNEL(chan, addr, bits, _shift) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .output = 1, \ .channel = chan, \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\ - .address = AD5686_ADDR_DAC(chan), \ + .address = addr, \ .scan_type = { \ .sign = 'u', \ .realbits = (bits), \ @@ -284,45 +188,119 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = { .ext_info = ad5686_ext_info, \ } +#define DECLARE_AD5686_CHANNELS(name, bits, _shift) \ +static struct iio_chan_spec name[] = { \ + AD5868_CHANNEL(0, 1, bits, _shift), \ + AD5868_CHANNEL(1, 2, bits, _shift), \ + AD5868_CHANNEL(2, 4, bits, _shift), \ + AD5868_CHANNEL(3, 8, bits, _shift), \ +} + +#define DECLARE_AD5676_CHANNELS(name, bits, _shift) \ +static struct iio_chan_spec name[] = { \ + AD5868_CHANNEL(0, 0, bits, _shift), \ + AD5868_CHANNEL(1, 1, bits, _shift), \ + AD5868_CHANNEL(2, 2, bits, _shift), \ + AD5868_CHANNEL(3, 3, bits, _shift), \ + AD5868_CHANNEL(4, 4, bits, _shift), \ + AD5868_CHANNEL(5, 5, bits, _shift), \ + AD5868_CHANNEL(6, 6, bits, _shift), \ + AD5868_CHANNEL(7, 7, bits, _shift), \ +} + +DECLARE_AD5676_CHANNELS(ad5672_channels, 12, 4); +DECLARE_AD5676_CHANNELS(ad5676_channels, 16, 0); +DECLARE_AD5686_CHANNELS(ad5684_channels, 12, 4); +DECLARE_AD5686_CHANNELS(ad5685r_channels, 14, 2); +DECLARE_AD5686_CHANNELS(ad5686_channels, 16, 0); + static const struct ad5686_chip_info ad5686_chip_info_tbl[] = { + [ID_AD5671R] = { + .channels = ad5672_channels, + .int_vref_mv = 2500, + .num_channels = 8, + }, + [ID_AD5672R] = { + .channels = ad5672_channels, + .int_vref_mv = 2500, + .num_channels = 8, + }, + [ID_AD5675R] = { + .channels = ad5676_channels, + .int_vref_mv = 2500, + .num_channels = 8, + }, + [ID_AD5676] = { + .channels = ad5676_channels, + .num_channels = 8, + }, + [ID_AD5676R] = { + .channels = ad5676_channels, + .int_vref_mv = 2500, + .num_channels = 8, + }, [ID_AD5684] = { - .channel[0] = AD5868_CHANNEL(0, 12, 4), - .channel[1] = AD5868_CHANNEL(1, 12, 4), - .channel[2] = AD5868_CHANNEL(2, 12, 4), - .channel[3] = AD5868_CHANNEL(3, 12, 4), + .channels = ad5684_channels, + .num_channels = 4, + }, + [ID_AD5684R] = { + .channels = ad5684_channels, .int_vref_mv = 2500, + .num_channels = 4, }, - [ID_AD5685] = { - .channel[0] = AD5868_CHANNEL(0, 14, 2), - .channel[1] = AD5868_CHANNEL(1, 14, 2), - .channel[2] = AD5868_CHANNEL(2, 14, 2), - .channel[3] = AD5868_CHANNEL(3, 14, 2), + [ID_AD5685R] = { + .channels = ad5685r_channels, .int_vref_mv = 2500, + .num_channels = 4, }, [ID_AD5686] = { - .channel[0] = AD5868_CHANNEL(0, 16, 0), - .channel[1] = AD5868_CHANNEL(1, 16, 0), - .channel[2] = AD5868_CHANNEL(2, 16, 0), - .channel[3] = AD5868_CHANNEL(3, 16, 0), + .channels = ad5686_channels, + .num_channels = 4, + }, + [ID_AD5686R] = { + .channels = ad5686_channels, .int_vref_mv = 2500, + .num_channels = 4, + }, + [ID_AD5694] = { + .channels = ad5684_channels, + .num_channels = 4, + }, + [ID_AD5694R] = { + .channels = ad5684_channels, + .int_vref_mv = 2500, + .num_channels = 4, + }, + [ID_AD5696] = { + .channels = ad5686_channels, + .num_channels = 4, + }, + [ID_AD5696R] = { + .channels = ad5686_channels, + .int_vref_mv = 2500, + .num_channels = 4, }, }; - -static int ad5686_probe(struct spi_device *spi) +int ad5686_probe(struct device *dev, enum ad5686_supported_device_ids chip_type, + const char *name, ad5686_write_func write, ad5686_read_func read) { struct ad5686_state *st; struct iio_dev *indio_dev; int ret, voltage_uv = 0; - indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); + indio_dev = devm_iio_device_alloc(dev, sizeof(*st)); if (indio_dev == NULL) return -ENOMEM; st = iio_priv(indio_dev); - spi_set_drvdata(spi, indio_dev); + dev_set_drvdata(dev, indio_dev); + + st->dev = dev; + st->write = write; + st->read = read; - st->reg = devm_regulator_get_optional(&spi->dev, "vcc"); + st->reg = devm_regulator_get_optional(dev, "vcc"); if (!IS_ERR(st->reg)) { ret = regulator_enable(st->reg); if (ret) @@ -335,28 +313,24 @@ static int ad5686_probe(struct spi_device *spi) voltage_uv = ret; } - st->chip_info = - &ad5686_chip_info_tbl[spi_get_device_id(spi)->driver_data]; + st->chip_info = &ad5686_chip_info_tbl[chip_type]; if (voltage_uv) st->vref_mv = voltage_uv / 1000; else st->vref_mv = st->chip_info->int_vref_mv; - st->spi = spi; - /* Set all the power down mode for all channels to 1K pulldown */ st->pwr_down_mode = 0x55; - indio_dev->dev.parent = &spi->dev; - indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->dev.parent = dev; + indio_dev->name = name; indio_dev->info = &ad5686_info; indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->channels = st->chip_info->channel; - indio_dev->num_channels = AD5686_DAC_CHANNELS; + indio_dev->channels = st->chip_info->channels; + indio_dev->num_channels = st->chip_info->num_channels; - ret = ad5686_spi_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0, - !!voltage_uv, 0); + ret = ad5686_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0, !!voltage_uv, 0); if (ret) goto error_disable_reg; @@ -372,9 +346,11 @@ static int ad5686_probe(struct spi_device *spi) return ret; } -static int ad5686_remove(struct spi_device *spi) +EXPORT_SYMBOL_GPL(ad5686_probe); + +int ad5686_remove(struct device *dev) { - struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5686_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); @@ -384,23 +360,7 @@ static int ad5686_remove(struct spi_device *spi) return 0; } -static const struct spi_device_id ad5686_id[] = { - {"ad5684", ID_AD5684}, - {"ad5685", ID_AD5685}, - {"ad5686", ID_AD5686}, - {} -}; -MODULE_DEVICE_TABLE(spi, ad5686_id); - -static struct spi_driver ad5686_driver = { - .driver = { - .name = "ad5686", - }, - .probe = ad5686_probe, - .remove = ad5686_remove, - .id_table = ad5686_id, -}; -module_spi_driver(ad5686_driver); +EXPORT_SYMBOL_GPL(ad5686_remove); MODULE_AUTHOR("Michael Hennerich "); MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC"); diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h new file mode 100644 index 00000000000000..04cd46931d2175 --- /dev/null +++ b/drivers/iio/dac/ad5686.h @@ -0,0 +1,112 @@ +#ifndef __DRIVERS_IIO_DAC_AD5686_H__ +#define __DRIVERS_IIO_DAC_AD5686_H__ + +#include +#include +#include +#include + +#define AD5686_ADDR(x) ((x) << 16) +#define AD5686_CMD(x) ((x) << 20) + +#define AD5686_ADDR_DAC(chan) (0x1 << (chan)) +#define AD5686_ADDR_ALL_DAC 0xF + +#define AD5686_CMD_NOOP 0x0 +#define AD5686_CMD_WRITE_INPUT_N 0x1 +#define AD5686_CMD_UPDATE_DAC_N 0x2 +#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3 +#define AD5686_CMD_POWERDOWN_DAC 0x4 +#define AD5686_CMD_LDAC_MASK 0x5 +#define AD5686_CMD_RESET 0x6 +#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7 +#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8 +#define AD5686_CMD_READBACK_ENABLE 0x9 + +#define AD5686_LDAC_PWRDN_NONE 0x0 +#define AD5686_LDAC_PWRDN_1K 0x1 +#define AD5686_LDAC_PWRDN_100K 0x2 +#define AD5686_LDAC_PWRDN_3STATE 0x3 + +/** + * ad5686_supported_device_ids: + */ +enum ad5686_supported_device_ids { + ID_AD5671R, + ID_AD5672R, + ID_AD5675R, + ID_AD5676, + ID_AD5676R, + ID_AD5684, + ID_AD5684R, + ID_AD5685R, + ID_AD5686, + ID_AD5686R, + ID_AD5694, + ID_AD5694R, + ID_AD5695R, + ID_AD5696, + ID_AD5696R, +}; + +struct ad5686_state; + +typedef int (*ad5686_write_func)(struct ad5686_state *st, + u8 cmd, u8 addr, u16 val); + +typedef int (*ad5686_read_func)(struct ad5686_state *st, u8 addr); + +/** + * struct ad5686_chip_info - chip specific information + * @int_vref_mv: AD5620/40/60: the internal reference voltage + * @num_channels: number of channels + * @channel: channel specification +*/ + +struct ad5686_chip_info { + u16 int_vref_mv; + unsigned int num_channels; + struct iio_chan_spec *channels; +}; + +/** + * struct ad5446_state - driver instance specific data + * @spi: spi_device + * @chip_info: chip model specific constants, available modes etc + * @reg: supply regulator + * @vref_mv: actual reference voltage used + * @pwr_down_mask: power down mask + * @pwr_down_mode: current power down mode + * @data: spi transfer buffers + */ + +struct ad5686_state { + struct device *dev; + const struct ad5686_chip_info *chip_info; + struct regulator *reg; + unsigned short vref_mv; + unsigned pwr_down_mask; + unsigned pwr_down_mode; + ad5686_write_func write; + ad5686_read_func read; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + + union { + __be32 d32; + __be16 d16; + u8 d8[4]; + } data[3] ____cacheline_aligned; +}; + + +int ad5686_probe(struct device *dev, enum ad5686_supported_device_ids chip_type, + const char *name, ad5686_write_func write, ad5686_read_func read); + +int ad5686_remove(struct device *dev); + + +#endif /* __DRIVERS_IIO_DAC_AD5686_H__ */ diff --git a/drivers/iio/dac/ad5696-i2c.c b/drivers/iio/dac/ad5696-i2c.c new file mode 100644 index 00000000000000..8a7bed1a2f39b4 --- /dev/null +++ b/drivers/iio/dac/ad5696-i2c.c @@ -0,0 +1,97 @@ +/* + * AD5671R, AD5675R, AD5694, AD5694R, AD5695R, AD5696, AD5696R + * Digital to analog converters driver + * + * Copyright 2018 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include "ad5686.h" + +#include +#include + +static int ad5686_i2c_read(struct ad5686_state *st, u8 addr) +{ + struct i2c_client *i2c = to_i2c_client(st->dev); + struct i2c_msg msg[2] = { + { + .addr = i2c->addr, + .flags = i2c->flags, + .len = 3, + .buf = &st->data[0].d8[1], + }, + { + .addr = i2c->addr, + .flags = i2c->flags | I2C_M_RD, + .len = 2, + .buf = (char *)&st->data[0].d16, + }, + }; + int ret; + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) | + AD5686_ADDR(addr) | + 0x00); + + ret = i2c_transfer(i2c->adapter, msg, 2); + if (ret < 0) + return ret; + + return be16_to_cpu(st->data[0].d16); +} + +static int ad5686_i2c_write(struct ad5686_state *st, + u8 cmd, u8 addr, u16 val) +{ + struct i2c_client *i2c = to_i2c_client(st->dev); + int ret; + + st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr) | val); + + ret = i2c_master_send(i2c, &st->data[0].d8[1], 3); + if (ret < 0) + return ret; + + return (ret != 3) ? -EIO : 0; +} + +static int ad5686_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + return ad5686_probe(&i2c->dev, id->driver_data, id->name, + ad5686_i2c_write, ad5686_i2c_read); +} + +static int ad5686_i2c_remove(struct i2c_client *i2c) +{ + return ad5686_remove(&i2c->dev); +} + +static const struct i2c_device_id ad5686_i2c_id[] = { + {"ad5671r", ID_AD5671R}, + {"ad5675r", ID_AD5675R}, + {"ad5694", ID_AD5694}, + {"ad5694r", ID_AD5694R}, + {"ad5695r", ID_AD5695R}, + {"ad5696", ID_AD5696}, + {"ad5696r", ID_AD5696R}, + {} +}; +MODULE_DEVICE_TABLE(i2c, i2c_device_id); + +static struct i2c_driver ad5686_i2c_driver = { + .driver = { + .name = "ad5696", + }, + .probe = ad5686_i2c_probe, + .remove = ad5686_i2c_remove, + .id_table = ad5686_i2c_id, +}; + +module_i2c_driver(ad5686_i2c_driver); + +MODULE_AUTHOR("Stefan Popa "); +MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs"); +MODULE_LICENSE("GPL v2");