1dbdc025bSLars-Peter Clausen /* 26a17a076SLars-Peter Clausen * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5629R, 36a17a076SLars-Peter Clausen * AD5648, AD5666, AD5668, AD5669R Digital to analog converters driver 4dbdc025bSLars-Peter Clausen * 5dbdc025bSLars-Peter Clausen * Copyright 2011 Analog Devices Inc. 6dbdc025bSLars-Peter Clausen * 7dbdc025bSLars-Peter Clausen * Licensed under the GPL-2. 8dbdc025bSLars-Peter Clausen */ 9dbdc025bSLars-Peter Clausen 10dbdc025bSLars-Peter Clausen #include <linux/device.h> 11dbdc025bSLars-Peter Clausen #include <linux/err.h> 12dbdc025bSLars-Peter Clausen #include <linux/module.h> 13dbdc025bSLars-Peter Clausen #include <linux/kernel.h> 14dbdc025bSLars-Peter Clausen #include <linux/spi/spi.h> 156a17a076SLars-Peter Clausen #include <linux/i2c.h> 16dbdc025bSLars-Peter Clausen #include <linux/slab.h> 17dbdc025bSLars-Peter Clausen #include <linux/sysfs.h> 18dbdc025bSLars-Peter Clausen #include <linux/regulator/consumer.h> 196a17a076SLars-Peter Clausen #include <asm/unaligned.h> 20dbdc025bSLars-Peter Clausen 21dbdc025bSLars-Peter Clausen #include <linux/iio/iio.h> 22dbdc025bSLars-Peter Clausen #include <linux/iio/sysfs.h> 23dbdc025bSLars-Peter Clausen 24dbdc025bSLars-Peter Clausen #define AD5064_MAX_DAC_CHANNELS 8 25dbdc025bSLars-Peter Clausen #define AD5064_MAX_VREFS 4 26dbdc025bSLars-Peter Clausen 27dbdc025bSLars-Peter Clausen #define AD5064_ADDR(x) ((x) << 20) 28dbdc025bSLars-Peter Clausen #define AD5064_CMD(x) ((x) << 24) 29dbdc025bSLars-Peter Clausen 30dbdc025bSLars-Peter Clausen #define AD5064_ADDR_ALL_DAC 0xF 31dbdc025bSLars-Peter Clausen 32dbdc025bSLars-Peter Clausen #define AD5064_CMD_WRITE_INPUT_N 0x0 33dbdc025bSLars-Peter Clausen #define AD5064_CMD_UPDATE_DAC_N 0x1 34dbdc025bSLars-Peter Clausen #define AD5064_CMD_WRITE_INPUT_N_UPDATE_ALL 0x2 35dbdc025bSLars-Peter Clausen #define AD5064_CMD_WRITE_INPUT_N_UPDATE_N 0x3 36dbdc025bSLars-Peter Clausen #define AD5064_CMD_POWERDOWN_DAC 0x4 37dbdc025bSLars-Peter Clausen #define AD5064_CMD_CLEAR 0x5 38dbdc025bSLars-Peter Clausen #define AD5064_CMD_LDAC_MASK 0x6 39dbdc025bSLars-Peter Clausen #define AD5064_CMD_RESET 0x7 40dbdc025bSLars-Peter Clausen #define AD5064_CMD_CONFIG 0x8 41dbdc025bSLars-Peter Clausen 42dbdc025bSLars-Peter Clausen #define AD5064_CONFIG_DAISY_CHAIN_ENABLE BIT(1) 43dbdc025bSLars-Peter Clausen #define AD5064_CONFIG_INT_VREF_ENABLE BIT(0) 44dbdc025bSLars-Peter Clausen 45dbdc025bSLars-Peter Clausen #define AD5064_LDAC_PWRDN_NONE 0x0 46dbdc025bSLars-Peter Clausen #define AD5064_LDAC_PWRDN_1K 0x1 47dbdc025bSLars-Peter Clausen #define AD5064_LDAC_PWRDN_100K 0x2 48dbdc025bSLars-Peter Clausen #define AD5064_LDAC_PWRDN_3STATE 0x3 49dbdc025bSLars-Peter Clausen 50dbdc025bSLars-Peter Clausen /** 51dbdc025bSLars-Peter Clausen * struct ad5064_chip_info - chip specific information 52dbdc025bSLars-Peter Clausen * @shared_vref: whether the vref supply is shared between channels 53dbdc025bSLars-Peter Clausen * @internal_vref: internal reference voltage. 0 if the chip has no internal 54dbdc025bSLars-Peter Clausen * vref. 55dbdc025bSLars-Peter Clausen * @channel: channel specification 56dbdc025bSLars-Peter Clausen * @num_channels: number of channels 57dbdc025bSLars-Peter Clausen */ 58dbdc025bSLars-Peter Clausen 59dbdc025bSLars-Peter Clausen struct ad5064_chip_info { 60dbdc025bSLars-Peter Clausen bool shared_vref; 61dbdc025bSLars-Peter Clausen unsigned long internal_vref; 62dbdc025bSLars-Peter Clausen const struct iio_chan_spec *channels; 63dbdc025bSLars-Peter Clausen unsigned int num_channels; 64dbdc025bSLars-Peter Clausen }; 65dbdc025bSLars-Peter Clausen 666a17a076SLars-Peter Clausen struct ad5064_state; 676a17a076SLars-Peter Clausen 686a17a076SLars-Peter Clausen typedef int (*ad5064_write_func)(struct ad5064_state *st, unsigned int cmd, 696a17a076SLars-Peter Clausen unsigned int addr, unsigned int val); 706a17a076SLars-Peter Clausen 71dbdc025bSLars-Peter Clausen /** 72dbdc025bSLars-Peter Clausen * struct ad5064_state - driver instance specific data 736a17a076SLars-Peter Clausen * @dev: the device for this driver instance 74dbdc025bSLars-Peter Clausen * @chip_info: chip model specific constants, available modes etc 75dbdc025bSLars-Peter Clausen * @vref_reg: vref supply regulators 76dbdc025bSLars-Peter Clausen * @pwr_down: whether channel is powered down 77dbdc025bSLars-Peter Clausen * @pwr_down_mode: channel's current power down mode 78dbdc025bSLars-Peter Clausen * @dac_cache: current DAC raw value (chip does not support readback) 79dbdc025bSLars-Peter Clausen * @use_internal_vref: set to true if the internal reference voltage should be 80dbdc025bSLars-Peter Clausen * used. 816a17a076SLars-Peter Clausen * @write: register write callback 826a17a076SLars-Peter Clausen * @data: i2c/spi transfer buffers 83dbdc025bSLars-Peter Clausen */ 84dbdc025bSLars-Peter Clausen 85dbdc025bSLars-Peter Clausen struct ad5064_state { 866a17a076SLars-Peter Clausen struct device *dev; 87dbdc025bSLars-Peter Clausen const struct ad5064_chip_info *chip_info; 88dbdc025bSLars-Peter Clausen struct regulator_bulk_data vref_reg[AD5064_MAX_VREFS]; 89dbdc025bSLars-Peter Clausen bool pwr_down[AD5064_MAX_DAC_CHANNELS]; 90dbdc025bSLars-Peter Clausen u8 pwr_down_mode[AD5064_MAX_DAC_CHANNELS]; 91dbdc025bSLars-Peter Clausen unsigned int dac_cache[AD5064_MAX_DAC_CHANNELS]; 92dbdc025bSLars-Peter Clausen bool use_internal_vref; 93dbdc025bSLars-Peter Clausen 946a17a076SLars-Peter Clausen ad5064_write_func write; 956a17a076SLars-Peter Clausen 96dbdc025bSLars-Peter Clausen /* 97dbdc025bSLars-Peter Clausen * DMA (thus cache coherency maintenance) requires the 98dbdc025bSLars-Peter Clausen * transfer buffers to live in their own cache lines. 99dbdc025bSLars-Peter Clausen */ 1006a17a076SLars-Peter Clausen union { 1016a17a076SLars-Peter Clausen u8 i2c[3]; 1026a17a076SLars-Peter Clausen __be32 spi; 1036a17a076SLars-Peter Clausen } data ____cacheline_aligned; 104dbdc025bSLars-Peter Clausen }; 105dbdc025bSLars-Peter Clausen 106dbdc025bSLars-Peter Clausen enum ad5064_type { 107dbdc025bSLars-Peter Clausen ID_AD5024, 108dbdc025bSLars-Peter Clausen ID_AD5025, 109dbdc025bSLars-Peter Clausen ID_AD5044, 110dbdc025bSLars-Peter Clausen ID_AD5045, 111dbdc025bSLars-Peter Clausen ID_AD5064, 112dbdc025bSLars-Peter Clausen ID_AD5064_1, 113dbdc025bSLars-Peter Clausen ID_AD5065, 114dbdc025bSLars-Peter Clausen ID_AD5628_1, 115dbdc025bSLars-Peter Clausen ID_AD5628_2, 116*5dcbe97bSLars-Peter Clausen ID_AD5629_1, 117*5dcbe97bSLars-Peter Clausen ID_AD5629_2, 118dbdc025bSLars-Peter Clausen ID_AD5648_1, 119dbdc025bSLars-Peter Clausen ID_AD5648_2, 120dbdc025bSLars-Peter Clausen ID_AD5666_1, 121dbdc025bSLars-Peter Clausen ID_AD5666_2, 122dbdc025bSLars-Peter Clausen ID_AD5668_1, 123dbdc025bSLars-Peter Clausen ID_AD5668_2, 124*5dcbe97bSLars-Peter Clausen ID_AD5669_1, 125*5dcbe97bSLars-Peter Clausen ID_AD5669_2, 126dbdc025bSLars-Peter Clausen }; 127dbdc025bSLars-Peter Clausen 1286a17a076SLars-Peter Clausen static int ad5064_write(struct ad5064_state *st, unsigned int cmd, 129dbdc025bSLars-Peter Clausen unsigned int addr, unsigned int val, unsigned int shift) 130dbdc025bSLars-Peter Clausen { 131dbdc025bSLars-Peter Clausen val <<= shift; 132dbdc025bSLars-Peter Clausen 1336a17a076SLars-Peter Clausen return st->write(st, cmd, addr, val); 134dbdc025bSLars-Peter Clausen } 135dbdc025bSLars-Peter Clausen 136dbdc025bSLars-Peter Clausen static int ad5064_sync_powerdown_mode(struct ad5064_state *st, 137a2630262SLars-Peter Clausen const struct iio_chan_spec *chan) 138dbdc025bSLars-Peter Clausen { 139dbdc025bSLars-Peter Clausen unsigned int val; 140dbdc025bSLars-Peter Clausen int ret; 141dbdc025bSLars-Peter Clausen 142a2630262SLars-Peter Clausen val = (0x1 << chan->address); 143dbdc025bSLars-Peter Clausen 144a2630262SLars-Peter Clausen if (st->pwr_down[chan->channel]) 145a2630262SLars-Peter Clausen val |= st->pwr_down_mode[chan->channel] << 8; 146dbdc025bSLars-Peter Clausen 1476a17a076SLars-Peter Clausen ret = ad5064_write(st, AD5064_CMD_POWERDOWN_DAC, 0, val, 0); 148dbdc025bSLars-Peter Clausen 149dbdc025bSLars-Peter Clausen return ret; 150dbdc025bSLars-Peter Clausen } 151dbdc025bSLars-Peter Clausen 152dbdc025bSLars-Peter Clausen static const char * const ad5064_powerdown_modes[] = { 153dbdc025bSLars-Peter Clausen "1kohm_to_gnd", 154dbdc025bSLars-Peter Clausen "100kohm_to_gnd", 155dbdc025bSLars-Peter Clausen "three_state", 156dbdc025bSLars-Peter Clausen }; 157dbdc025bSLars-Peter Clausen 158dbdc025bSLars-Peter Clausen static int ad5064_get_powerdown_mode(struct iio_dev *indio_dev, 159dbdc025bSLars-Peter Clausen const struct iio_chan_spec *chan) 160dbdc025bSLars-Peter Clausen { 161dbdc025bSLars-Peter Clausen struct ad5064_state *st = iio_priv(indio_dev); 162dbdc025bSLars-Peter Clausen 163dbdc025bSLars-Peter Clausen return st->pwr_down_mode[chan->channel] - 1; 164dbdc025bSLars-Peter Clausen } 165dbdc025bSLars-Peter Clausen 166dbdc025bSLars-Peter Clausen static int ad5064_set_powerdown_mode(struct iio_dev *indio_dev, 167dbdc025bSLars-Peter Clausen const struct iio_chan_spec *chan, unsigned int mode) 168dbdc025bSLars-Peter Clausen { 169dbdc025bSLars-Peter Clausen struct ad5064_state *st = iio_priv(indio_dev); 170dbdc025bSLars-Peter Clausen int ret; 171dbdc025bSLars-Peter Clausen 172dbdc025bSLars-Peter Clausen mutex_lock(&indio_dev->mlock); 173dbdc025bSLars-Peter Clausen st->pwr_down_mode[chan->channel] = mode + 1; 174dbdc025bSLars-Peter Clausen 175a2630262SLars-Peter Clausen ret = ad5064_sync_powerdown_mode(st, chan); 176dbdc025bSLars-Peter Clausen mutex_unlock(&indio_dev->mlock); 177dbdc025bSLars-Peter Clausen 178dbdc025bSLars-Peter Clausen return ret; 179dbdc025bSLars-Peter Clausen } 180dbdc025bSLars-Peter Clausen 181dbdc025bSLars-Peter Clausen static const struct iio_enum ad5064_powerdown_mode_enum = { 182dbdc025bSLars-Peter Clausen .items = ad5064_powerdown_modes, 183dbdc025bSLars-Peter Clausen .num_items = ARRAY_SIZE(ad5064_powerdown_modes), 184dbdc025bSLars-Peter Clausen .get = ad5064_get_powerdown_mode, 185dbdc025bSLars-Peter Clausen .set = ad5064_set_powerdown_mode, 186dbdc025bSLars-Peter Clausen }; 187dbdc025bSLars-Peter Clausen 188dbdc025bSLars-Peter Clausen static ssize_t ad5064_read_dac_powerdown(struct iio_dev *indio_dev, 189dbdc025bSLars-Peter Clausen uintptr_t private, const struct iio_chan_spec *chan, char *buf) 190dbdc025bSLars-Peter Clausen { 191dbdc025bSLars-Peter Clausen struct ad5064_state *st = iio_priv(indio_dev); 192dbdc025bSLars-Peter Clausen 193dbdc025bSLars-Peter Clausen return sprintf(buf, "%d\n", st->pwr_down[chan->channel]); 194dbdc025bSLars-Peter Clausen } 195dbdc025bSLars-Peter Clausen 196dbdc025bSLars-Peter Clausen static ssize_t ad5064_write_dac_powerdown(struct iio_dev *indio_dev, 197dbdc025bSLars-Peter Clausen uintptr_t private, const struct iio_chan_spec *chan, const char *buf, 198dbdc025bSLars-Peter Clausen size_t len) 199dbdc025bSLars-Peter Clausen { 200dbdc025bSLars-Peter Clausen struct ad5064_state *st = iio_priv(indio_dev); 201dbdc025bSLars-Peter Clausen bool pwr_down; 202dbdc025bSLars-Peter Clausen int ret; 203dbdc025bSLars-Peter Clausen 204dbdc025bSLars-Peter Clausen ret = strtobool(buf, &pwr_down); 205dbdc025bSLars-Peter Clausen if (ret) 206dbdc025bSLars-Peter Clausen return ret; 207dbdc025bSLars-Peter Clausen 208dbdc025bSLars-Peter Clausen mutex_lock(&indio_dev->mlock); 209dbdc025bSLars-Peter Clausen st->pwr_down[chan->channel] = pwr_down; 210dbdc025bSLars-Peter Clausen 211a2630262SLars-Peter Clausen ret = ad5064_sync_powerdown_mode(st, chan); 212dbdc025bSLars-Peter Clausen mutex_unlock(&indio_dev->mlock); 213dbdc025bSLars-Peter Clausen return ret ? ret : len; 214dbdc025bSLars-Peter Clausen } 215dbdc025bSLars-Peter Clausen 216dbdc025bSLars-Peter Clausen static int ad5064_get_vref(struct ad5064_state *st, 217dbdc025bSLars-Peter Clausen struct iio_chan_spec const *chan) 218dbdc025bSLars-Peter Clausen { 219dbdc025bSLars-Peter Clausen unsigned int i; 220dbdc025bSLars-Peter Clausen 221dbdc025bSLars-Peter Clausen if (st->use_internal_vref) 222dbdc025bSLars-Peter Clausen return st->chip_info->internal_vref; 223dbdc025bSLars-Peter Clausen 224dbdc025bSLars-Peter Clausen i = st->chip_info->shared_vref ? 0 : chan->channel; 225dbdc025bSLars-Peter Clausen return regulator_get_voltage(st->vref_reg[i].consumer); 226dbdc025bSLars-Peter Clausen } 227dbdc025bSLars-Peter Clausen 228dbdc025bSLars-Peter Clausen static int ad5064_read_raw(struct iio_dev *indio_dev, 229dbdc025bSLars-Peter Clausen struct iio_chan_spec const *chan, 230dbdc025bSLars-Peter Clausen int *val, 231dbdc025bSLars-Peter Clausen int *val2, 232dbdc025bSLars-Peter Clausen long m) 233dbdc025bSLars-Peter Clausen { 234dbdc025bSLars-Peter Clausen struct ad5064_state *st = iio_priv(indio_dev); 235dbdc025bSLars-Peter Clausen int scale_uv; 236dbdc025bSLars-Peter Clausen 237dbdc025bSLars-Peter Clausen switch (m) { 238dbdc025bSLars-Peter Clausen case IIO_CHAN_INFO_RAW: 239dbdc025bSLars-Peter Clausen *val = st->dac_cache[chan->channel]; 240dbdc025bSLars-Peter Clausen return IIO_VAL_INT; 241dbdc025bSLars-Peter Clausen case IIO_CHAN_INFO_SCALE: 242dbdc025bSLars-Peter Clausen scale_uv = ad5064_get_vref(st, chan); 243dbdc025bSLars-Peter Clausen if (scale_uv < 0) 244dbdc025bSLars-Peter Clausen return scale_uv; 245dbdc025bSLars-Peter Clausen 24625682ae5SLars-Peter Clausen *val = scale_uv / 1000; 24725682ae5SLars-Peter Clausen *val2 = chan->scan_type.realbits; 24825682ae5SLars-Peter Clausen return IIO_VAL_FRACTIONAL_LOG2; 249dbdc025bSLars-Peter Clausen default: 250dbdc025bSLars-Peter Clausen break; 251dbdc025bSLars-Peter Clausen } 252dbdc025bSLars-Peter Clausen return -EINVAL; 253dbdc025bSLars-Peter Clausen } 254dbdc025bSLars-Peter Clausen 255dbdc025bSLars-Peter Clausen static int ad5064_write_raw(struct iio_dev *indio_dev, 256dbdc025bSLars-Peter Clausen struct iio_chan_spec const *chan, int val, int val2, long mask) 257dbdc025bSLars-Peter Clausen { 258dbdc025bSLars-Peter Clausen struct ad5064_state *st = iio_priv(indio_dev); 259dbdc025bSLars-Peter Clausen int ret; 260dbdc025bSLars-Peter Clausen 261dbdc025bSLars-Peter Clausen switch (mask) { 262dbdc025bSLars-Peter Clausen case IIO_CHAN_INFO_RAW: 263c5ef717aSLars-Peter Clausen if (val >= (1 << chan->scan_type.realbits) || val < 0) 264dbdc025bSLars-Peter Clausen return -EINVAL; 265dbdc025bSLars-Peter Clausen 266dbdc025bSLars-Peter Clausen mutex_lock(&indio_dev->mlock); 2676a17a076SLars-Peter Clausen ret = ad5064_write(st, AD5064_CMD_WRITE_INPUT_N_UPDATE_N, 268dbdc025bSLars-Peter Clausen chan->address, val, chan->scan_type.shift); 269dbdc025bSLars-Peter Clausen if (ret == 0) 270dbdc025bSLars-Peter Clausen st->dac_cache[chan->channel] = val; 271dbdc025bSLars-Peter Clausen mutex_unlock(&indio_dev->mlock); 272dbdc025bSLars-Peter Clausen break; 273dbdc025bSLars-Peter Clausen default: 274dbdc025bSLars-Peter Clausen ret = -EINVAL; 275dbdc025bSLars-Peter Clausen } 276dbdc025bSLars-Peter Clausen 277dbdc025bSLars-Peter Clausen return ret; 278dbdc025bSLars-Peter Clausen } 279dbdc025bSLars-Peter Clausen 280dbdc025bSLars-Peter Clausen static const struct iio_info ad5064_info = { 281dbdc025bSLars-Peter Clausen .read_raw = ad5064_read_raw, 282dbdc025bSLars-Peter Clausen .write_raw = ad5064_write_raw, 283dbdc025bSLars-Peter Clausen .driver_module = THIS_MODULE, 284dbdc025bSLars-Peter Clausen }; 285dbdc025bSLars-Peter Clausen 286dbdc025bSLars-Peter Clausen static const struct iio_chan_spec_ext_info ad5064_ext_info[] = { 287dbdc025bSLars-Peter Clausen { 288dbdc025bSLars-Peter Clausen .name = "powerdown", 289dbdc025bSLars-Peter Clausen .read = ad5064_read_dac_powerdown, 290dbdc025bSLars-Peter Clausen .write = ad5064_write_dac_powerdown, 2913704432fSJonathan Cameron .shared = IIO_SEPARATE, 292dbdc025bSLars-Peter Clausen }, 2933704432fSJonathan Cameron IIO_ENUM("powerdown_mode", IIO_SEPARATE, &ad5064_powerdown_mode_enum), 294dbdc025bSLars-Peter Clausen IIO_ENUM_AVAILABLE("powerdown_mode", &ad5064_powerdown_mode_enum), 295dbdc025bSLars-Peter Clausen { }, 296dbdc025bSLars-Peter Clausen }; 297dbdc025bSLars-Peter Clausen 298*5dcbe97bSLars-Peter Clausen #define AD5064_CHANNEL(chan, addr, bits, _shift) { \ 299dbdc025bSLars-Peter Clausen .type = IIO_VOLTAGE, \ 300dbdc025bSLars-Peter Clausen .indexed = 1, \ 301dbdc025bSLars-Peter Clausen .output = 1, \ 302dbdc025bSLars-Peter Clausen .channel = (chan), \ 30320a0edddSJonathan Cameron .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ 30420a0edddSJonathan Cameron BIT(IIO_CHAN_INFO_SCALE), \ 305a2630262SLars-Peter Clausen .address = addr, \ 30681d49bc6SJonathan Cameron .scan_type = { \ 30781d49bc6SJonathan Cameron .sign = 'u', \ 30881d49bc6SJonathan Cameron .realbits = (bits), \ 30981d49bc6SJonathan Cameron .storagebits = 16, \ 310*5dcbe97bSLars-Peter Clausen .shift = (_shift), \ 31181d49bc6SJonathan Cameron }, \ 312dbdc025bSLars-Peter Clausen .ext_info = ad5064_ext_info, \ 313dbdc025bSLars-Peter Clausen } 314dbdc025bSLars-Peter Clausen 315*5dcbe97bSLars-Peter Clausen #define DECLARE_AD5064_CHANNELS(name, bits, shift) \ 316dbdc025bSLars-Peter Clausen const struct iio_chan_spec name[] = { \ 317*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(0, 0, bits, shift), \ 318*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(1, 1, bits, shift), \ 319*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(2, 2, bits, shift), \ 320*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(3, 3, bits, shift), \ 321*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(4, 4, bits, shift), \ 322*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(5, 5, bits, shift), \ 323*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(6, 6, bits, shift), \ 324*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(7, 7, bits, shift), \ 325a2630262SLars-Peter Clausen } 326a2630262SLars-Peter Clausen 327*5dcbe97bSLars-Peter Clausen #define DECLARE_AD5065_CHANNELS(name, bits, shift) \ 328a2630262SLars-Peter Clausen const struct iio_chan_spec name[] = { \ 329*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(0, 0, bits, shift), \ 330*5dcbe97bSLars-Peter Clausen AD5064_CHANNEL(1, 3, bits, shift), \ 331dbdc025bSLars-Peter Clausen } 332dbdc025bSLars-Peter Clausen 333*5dcbe97bSLars-Peter Clausen static DECLARE_AD5064_CHANNELS(ad5024_channels, 12, 8); 334*5dcbe97bSLars-Peter Clausen static DECLARE_AD5064_CHANNELS(ad5044_channels, 14, 6); 335*5dcbe97bSLars-Peter Clausen static DECLARE_AD5064_CHANNELS(ad5064_channels, 16, 4); 336dbdc025bSLars-Peter Clausen 337*5dcbe97bSLars-Peter Clausen static DECLARE_AD5065_CHANNELS(ad5025_channels, 12, 8); 338*5dcbe97bSLars-Peter Clausen static DECLARE_AD5065_CHANNELS(ad5045_channels, 14, 6); 339*5dcbe97bSLars-Peter Clausen static DECLARE_AD5065_CHANNELS(ad5065_channels, 16, 4); 340*5dcbe97bSLars-Peter Clausen 341*5dcbe97bSLars-Peter Clausen static DECLARE_AD5064_CHANNELS(ad5629_channels, 12, 4); 342*5dcbe97bSLars-Peter Clausen static DECLARE_AD5064_CHANNELS(ad5669_channels, 16, 0); 343a2630262SLars-Peter Clausen 344dbdc025bSLars-Peter Clausen static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { 345dbdc025bSLars-Peter Clausen [ID_AD5024] = { 346dbdc025bSLars-Peter Clausen .shared_vref = false, 347dbdc025bSLars-Peter Clausen .channels = ad5024_channels, 348dbdc025bSLars-Peter Clausen .num_channels = 4, 349dbdc025bSLars-Peter Clausen }, 350dbdc025bSLars-Peter Clausen [ID_AD5025] = { 351dbdc025bSLars-Peter Clausen .shared_vref = false, 352a2630262SLars-Peter Clausen .channels = ad5025_channels, 353dbdc025bSLars-Peter Clausen .num_channels = 2, 354dbdc025bSLars-Peter Clausen }, 355dbdc025bSLars-Peter Clausen [ID_AD5044] = { 356dbdc025bSLars-Peter Clausen .shared_vref = false, 357dbdc025bSLars-Peter Clausen .channels = ad5044_channels, 358dbdc025bSLars-Peter Clausen .num_channels = 4, 359dbdc025bSLars-Peter Clausen }, 360dbdc025bSLars-Peter Clausen [ID_AD5045] = { 361dbdc025bSLars-Peter Clausen .shared_vref = false, 362a2630262SLars-Peter Clausen .channels = ad5045_channels, 363dbdc025bSLars-Peter Clausen .num_channels = 2, 364dbdc025bSLars-Peter Clausen }, 365dbdc025bSLars-Peter Clausen [ID_AD5064] = { 366dbdc025bSLars-Peter Clausen .shared_vref = false, 367dbdc025bSLars-Peter Clausen .channels = ad5064_channels, 368dbdc025bSLars-Peter Clausen .num_channels = 4, 369dbdc025bSLars-Peter Clausen }, 370dbdc025bSLars-Peter Clausen [ID_AD5064_1] = { 371dbdc025bSLars-Peter Clausen .shared_vref = true, 372dbdc025bSLars-Peter Clausen .channels = ad5064_channels, 373dbdc025bSLars-Peter Clausen .num_channels = 4, 374dbdc025bSLars-Peter Clausen }, 375dbdc025bSLars-Peter Clausen [ID_AD5065] = { 376dbdc025bSLars-Peter Clausen .shared_vref = false, 377a2630262SLars-Peter Clausen .channels = ad5065_channels, 378dbdc025bSLars-Peter Clausen .num_channels = 2, 379dbdc025bSLars-Peter Clausen }, 380dbdc025bSLars-Peter Clausen [ID_AD5628_1] = { 381dbdc025bSLars-Peter Clausen .shared_vref = true, 382dbdc025bSLars-Peter Clausen .internal_vref = 2500000, 383dbdc025bSLars-Peter Clausen .channels = ad5024_channels, 384dbdc025bSLars-Peter Clausen .num_channels = 8, 385dbdc025bSLars-Peter Clausen }, 386dbdc025bSLars-Peter Clausen [ID_AD5628_2] = { 387dbdc025bSLars-Peter Clausen .shared_vref = true, 388dbdc025bSLars-Peter Clausen .internal_vref = 5000000, 389dbdc025bSLars-Peter Clausen .channels = ad5024_channels, 390dbdc025bSLars-Peter Clausen .num_channels = 8, 391dbdc025bSLars-Peter Clausen }, 392*5dcbe97bSLars-Peter Clausen [ID_AD5629_1] = { 393*5dcbe97bSLars-Peter Clausen .shared_vref = true, 394*5dcbe97bSLars-Peter Clausen .internal_vref = 2500000, 395*5dcbe97bSLars-Peter Clausen .channels = ad5629_channels, 396*5dcbe97bSLars-Peter Clausen .num_channels = 8, 397*5dcbe97bSLars-Peter Clausen }, 398*5dcbe97bSLars-Peter Clausen [ID_AD5629_2] = { 399*5dcbe97bSLars-Peter Clausen .shared_vref = true, 400*5dcbe97bSLars-Peter Clausen .internal_vref = 5000000, 401*5dcbe97bSLars-Peter Clausen .channels = ad5629_channels, 402*5dcbe97bSLars-Peter Clausen .num_channels = 8, 403*5dcbe97bSLars-Peter Clausen }, 404dbdc025bSLars-Peter Clausen [ID_AD5648_1] = { 405dbdc025bSLars-Peter Clausen .shared_vref = true, 406dbdc025bSLars-Peter Clausen .internal_vref = 2500000, 407dbdc025bSLars-Peter Clausen .channels = ad5044_channels, 408dbdc025bSLars-Peter Clausen .num_channels = 8, 409dbdc025bSLars-Peter Clausen }, 410dbdc025bSLars-Peter Clausen [ID_AD5648_2] = { 411dbdc025bSLars-Peter Clausen .shared_vref = true, 412dbdc025bSLars-Peter Clausen .internal_vref = 5000000, 413dbdc025bSLars-Peter Clausen .channels = ad5044_channels, 414dbdc025bSLars-Peter Clausen .num_channels = 8, 415dbdc025bSLars-Peter Clausen }, 416dbdc025bSLars-Peter Clausen [ID_AD5666_1] = { 417dbdc025bSLars-Peter Clausen .shared_vref = true, 418dbdc025bSLars-Peter Clausen .internal_vref = 2500000, 419dbdc025bSLars-Peter Clausen .channels = ad5064_channels, 420dbdc025bSLars-Peter Clausen .num_channels = 4, 421dbdc025bSLars-Peter Clausen }, 422dbdc025bSLars-Peter Clausen [ID_AD5666_2] = { 423dbdc025bSLars-Peter Clausen .shared_vref = true, 424dbdc025bSLars-Peter Clausen .internal_vref = 5000000, 425dbdc025bSLars-Peter Clausen .channels = ad5064_channels, 426dbdc025bSLars-Peter Clausen .num_channels = 4, 427dbdc025bSLars-Peter Clausen }, 428dbdc025bSLars-Peter Clausen [ID_AD5668_1] = { 429dbdc025bSLars-Peter Clausen .shared_vref = true, 430dbdc025bSLars-Peter Clausen .internal_vref = 2500000, 431dbdc025bSLars-Peter Clausen .channels = ad5064_channels, 432dbdc025bSLars-Peter Clausen .num_channels = 8, 433dbdc025bSLars-Peter Clausen }, 434dbdc025bSLars-Peter Clausen [ID_AD5668_2] = { 435dbdc025bSLars-Peter Clausen .shared_vref = true, 436dbdc025bSLars-Peter Clausen .internal_vref = 5000000, 437dbdc025bSLars-Peter Clausen .channels = ad5064_channels, 438dbdc025bSLars-Peter Clausen .num_channels = 8, 439dbdc025bSLars-Peter Clausen }, 440*5dcbe97bSLars-Peter Clausen [ID_AD5669_1] = { 441*5dcbe97bSLars-Peter Clausen .shared_vref = true, 442*5dcbe97bSLars-Peter Clausen .internal_vref = 2500000, 443*5dcbe97bSLars-Peter Clausen .channels = ad5669_channels, 444*5dcbe97bSLars-Peter Clausen .num_channels = 8, 445*5dcbe97bSLars-Peter Clausen }, 446*5dcbe97bSLars-Peter Clausen [ID_AD5669_2] = { 447*5dcbe97bSLars-Peter Clausen .shared_vref = true, 448*5dcbe97bSLars-Peter Clausen .internal_vref = 5000000, 449*5dcbe97bSLars-Peter Clausen .channels = ad5669_channels, 450*5dcbe97bSLars-Peter Clausen .num_channels = 8, 451*5dcbe97bSLars-Peter Clausen }, 452dbdc025bSLars-Peter Clausen }; 453dbdc025bSLars-Peter Clausen 454dbdc025bSLars-Peter Clausen static inline unsigned int ad5064_num_vref(struct ad5064_state *st) 455dbdc025bSLars-Peter Clausen { 456dbdc025bSLars-Peter Clausen return st->chip_info->shared_vref ? 1 : st->chip_info->num_channels; 457dbdc025bSLars-Peter Clausen } 458dbdc025bSLars-Peter Clausen 459dbdc025bSLars-Peter Clausen static const char * const ad5064_vref_names[] = { 460dbdc025bSLars-Peter Clausen "vrefA", 461dbdc025bSLars-Peter Clausen "vrefB", 462dbdc025bSLars-Peter Clausen "vrefC", 463dbdc025bSLars-Peter Clausen "vrefD", 464dbdc025bSLars-Peter Clausen }; 465dbdc025bSLars-Peter Clausen 466dbdc025bSLars-Peter Clausen static const char * const ad5064_vref_name(struct ad5064_state *st, 467dbdc025bSLars-Peter Clausen unsigned int vref) 468dbdc025bSLars-Peter Clausen { 469dbdc025bSLars-Peter Clausen return st->chip_info->shared_vref ? "vref" : ad5064_vref_names[vref]; 470dbdc025bSLars-Peter Clausen } 471dbdc025bSLars-Peter Clausen 472fc52692cSGreg Kroah-Hartman static int ad5064_probe(struct device *dev, enum ad5064_type type, 4736a17a076SLars-Peter Clausen const char *name, ad5064_write_func write) 474dbdc025bSLars-Peter Clausen { 475dbdc025bSLars-Peter Clausen struct iio_dev *indio_dev; 476dbdc025bSLars-Peter Clausen struct ad5064_state *st; 477f77ae9d8SLars-Peter Clausen unsigned int midscale; 478dbdc025bSLars-Peter Clausen unsigned int i; 479dbdc025bSLars-Peter Clausen int ret; 480dbdc025bSLars-Peter Clausen 481c367982aSSachin Kamat indio_dev = devm_iio_device_alloc(dev, sizeof(*st)); 482dbdc025bSLars-Peter Clausen if (indio_dev == NULL) 483dbdc025bSLars-Peter Clausen return -ENOMEM; 484dbdc025bSLars-Peter Clausen 485dbdc025bSLars-Peter Clausen st = iio_priv(indio_dev); 4866a17a076SLars-Peter Clausen dev_set_drvdata(dev, indio_dev); 487dbdc025bSLars-Peter Clausen 488dbdc025bSLars-Peter Clausen st->chip_info = &ad5064_chip_info_tbl[type]; 4896a17a076SLars-Peter Clausen st->dev = dev; 4906a17a076SLars-Peter Clausen st->write = write; 491dbdc025bSLars-Peter Clausen 492dbdc025bSLars-Peter Clausen for (i = 0; i < ad5064_num_vref(st); ++i) 493dbdc025bSLars-Peter Clausen st->vref_reg[i].supply = ad5064_vref_name(st, i); 494dbdc025bSLars-Peter Clausen 495c367982aSSachin Kamat ret = devm_regulator_bulk_get(dev, ad5064_num_vref(st), 496dbdc025bSLars-Peter Clausen st->vref_reg); 497dbdc025bSLars-Peter Clausen if (ret) { 498dbdc025bSLars-Peter Clausen if (!st->chip_info->internal_vref) 499c367982aSSachin Kamat return ret; 500dbdc025bSLars-Peter Clausen st->use_internal_vref = true; 5016a17a076SLars-Peter Clausen ret = ad5064_write(st, AD5064_CMD_CONFIG, 0, 502dbdc025bSLars-Peter Clausen AD5064_CONFIG_INT_VREF_ENABLE, 0); 503dbdc025bSLars-Peter Clausen if (ret) { 5046a17a076SLars-Peter Clausen dev_err(dev, "Failed to enable internal vref: %d\n", 505dbdc025bSLars-Peter Clausen ret); 506c367982aSSachin Kamat return ret; 507dbdc025bSLars-Peter Clausen } 508dbdc025bSLars-Peter Clausen } else { 509dbdc025bSLars-Peter Clausen ret = regulator_bulk_enable(ad5064_num_vref(st), st->vref_reg); 510dbdc025bSLars-Peter Clausen if (ret) 511c367982aSSachin Kamat return ret; 512dbdc025bSLars-Peter Clausen } 513dbdc025bSLars-Peter Clausen 5146a17a076SLars-Peter Clausen indio_dev->dev.parent = dev; 5156a17a076SLars-Peter Clausen indio_dev->name = name; 516dbdc025bSLars-Peter Clausen indio_dev->info = &ad5064_info; 517dbdc025bSLars-Peter Clausen indio_dev->modes = INDIO_DIRECT_MODE; 518dbdc025bSLars-Peter Clausen indio_dev->channels = st->chip_info->channels; 519dbdc025bSLars-Peter Clausen indio_dev->num_channels = st->chip_info->num_channels; 520dbdc025bSLars-Peter Clausen 521f77ae9d8SLars-Peter Clausen midscale = (1 << indio_dev->channels[0].scan_type.realbits) / 2; 522f77ae9d8SLars-Peter Clausen 523f77ae9d8SLars-Peter Clausen for (i = 0; i < st->chip_info->num_channels; ++i) { 524f77ae9d8SLars-Peter Clausen st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K; 525f77ae9d8SLars-Peter Clausen st->dac_cache[i] = midscale; 526f77ae9d8SLars-Peter Clausen } 527f77ae9d8SLars-Peter Clausen 528dbdc025bSLars-Peter Clausen ret = iio_device_register(indio_dev); 529dbdc025bSLars-Peter Clausen if (ret) 530dbdc025bSLars-Peter Clausen goto error_disable_reg; 531dbdc025bSLars-Peter Clausen 532dbdc025bSLars-Peter Clausen return 0; 533dbdc025bSLars-Peter Clausen 534dbdc025bSLars-Peter Clausen error_disable_reg: 535dbdc025bSLars-Peter Clausen if (!st->use_internal_vref) 536dbdc025bSLars-Peter Clausen regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); 537dbdc025bSLars-Peter Clausen 538dbdc025bSLars-Peter Clausen return ret; 539dbdc025bSLars-Peter Clausen } 540dbdc025bSLars-Peter Clausen 541fc52692cSGreg Kroah-Hartman static int ad5064_remove(struct device *dev) 542dbdc025bSLars-Peter Clausen { 5436a17a076SLars-Peter Clausen struct iio_dev *indio_dev = dev_get_drvdata(dev); 544dbdc025bSLars-Peter Clausen struct ad5064_state *st = iio_priv(indio_dev); 545dbdc025bSLars-Peter Clausen 546dbdc025bSLars-Peter Clausen iio_device_unregister(indio_dev); 547dbdc025bSLars-Peter Clausen 548c367982aSSachin Kamat if (!st->use_internal_vref) 549dbdc025bSLars-Peter Clausen regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg); 550dbdc025bSLars-Peter Clausen 551dbdc025bSLars-Peter Clausen return 0; 552dbdc025bSLars-Peter Clausen } 553dbdc025bSLars-Peter Clausen 5546a17a076SLars-Peter Clausen #if IS_ENABLED(CONFIG_SPI_MASTER) 5556a17a076SLars-Peter Clausen 5569660ac70SLars-Peter Clausen static int ad5064_spi_write(struct ad5064_state *st, unsigned int cmd, 5579660ac70SLars-Peter Clausen unsigned int addr, unsigned int val) 5589660ac70SLars-Peter Clausen { 5599660ac70SLars-Peter Clausen struct spi_device *spi = to_spi_device(st->dev); 5609660ac70SLars-Peter Clausen 5619660ac70SLars-Peter Clausen st->data.spi = cpu_to_be32(AD5064_CMD(cmd) | AD5064_ADDR(addr) | val); 5629660ac70SLars-Peter Clausen return spi_write(spi, &st->data.spi, sizeof(st->data.spi)); 5639660ac70SLars-Peter Clausen } 5649660ac70SLars-Peter Clausen 565fc52692cSGreg Kroah-Hartman static int ad5064_spi_probe(struct spi_device *spi) 5666a17a076SLars-Peter Clausen { 5676a17a076SLars-Peter Clausen const struct spi_device_id *id = spi_get_device_id(spi); 5686a17a076SLars-Peter Clausen 5696a17a076SLars-Peter Clausen return ad5064_probe(&spi->dev, id->driver_data, id->name, 5706a17a076SLars-Peter Clausen ad5064_spi_write); 5716a17a076SLars-Peter Clausen } 5726a17a076SLars-Peter Clausen 573fc52692cSGreg Kroah-Hartman static int ad5064_spi_remove(struct spi_device *spi) 5746a17a076SLars-Peter Clausen { 5756a17a076SLars-Peter Clausen return ad5064_remove(&spi->dev); 5766a17a076SLars-Peter Clausen } 5776a17a076SLars-Peter Clausen 5786a17a076SLars-Peter Clausen static const struct spi_device_id ad5064_spi_ids[] = { 579dbdc025bSLars-Peter Clausen {"ad5024", ID_AD5024}, 580dbdc025bSLars-Peter Clausen {"ad5025", ID_AD5025}, 581dbdc025bSLars-Peter Clausen {"ad5044", ID_AD5044}, 582dbdc025bSLars-Peter Clausen {"ad5045", ID_AD5045}, 583dbdc025bSLars-Peter Clausen {"ad5064", ID_AD5064}, 584dbdc025bSLars-Peter Clausen {"ad5064-1", ID_AD5064_1}, 585dbdc025bSLars-Peter Clausen {"ad5065", ID_AD5065}, 586dbdc025bSLars-Peter Clausen {"ad5628-1", ID_AD5628_1}, 587dbdc025bSLars-Peter Clausen {"ad5628-2", ID_AD5628_2}, 588dbdc025bSLars-Peter Clausen {"ad5648-1", ID_AD5648_1}, 589dbdc025bSLars-Peter Clausen {"ad5648-2", ID_AD5648_2}, 590dbdc025bSLars-Peter Clausen {"ad5666-1", ID_AD5666_1}, 591dbdc025bSLars-Peter Clausen {"ad5666-2", ID_AD5666_2}, 592dbdc025bSLars-Peter Clausen {"ad5668-1", ID_AD5668_1}, 593dbdc025bSLars-Peter Clausen {"ad5668-2", ID_AD5668_2}, 594dbdc025bSLars-Peter Clausen {"ad5668-3", ID_AD5668_2}, /* similar enough to ad5668-2 */ 595dbdc025bSLars-Peter Clausen {} 596dbdc025bSLars-Peter Clausen }; 5976a17a076SLars-Peter Clausen MODULE_DEVICE_TABLE(spi, ad5064_spi_ids); 598dbdc025bSLars-Peter Clausen 5996a17a076SLars-Peter Clausen static struct spi_driver ad5064_spi_driver = { 600dbdc025bSLars-Peter Clausen .driver = { 601dbdc025bSLars-Peter Clausen .name = "ad5064", 602dbdc025bSLars-Peter Clausen .owner = THIS_MODULE, 603dbdc025bSLars-Peter Clausen }, 6046a17a076SLars-Peter Clausen .probe = ad5064_spi_probe, 605fc52692cSGreg Kroah-Hartman .remove = ad5064_spi_remove, 6066a17a076SLars-Peter Clausen .id_table = ad5064_spi_ids, 607dbdc025bSLars-Peter Clausen }; 6086a17a076SLars-Peter Clausen 6096a17a076SLars-Peter Clausen static int __init ad5064_spi_register_driver(void) 6106a17a076SLars-Peter Clausen { 6116a17a076SLars-Peter Clausen return spi_register_driver(&ad5064_spi_driver); 6126a17a076SLars-Peter Clausen } 6136a17a076SLars-Peter Clausen 61421fa54e4SGerard Snitselaar static void ad5064_spi_unregister_driver(void) 6156a17a076SLars-Peter Clausen { 6166a17a076SLars-Peter Clausen spi_unregister_driver(&ad5064_spi_driver); 6176a17a076SLars-Peter Clausen } 6186a17a076SLars-Peter Clausen 6196a17a076SLars-Peter Clausen #else 6206a17a076SLars-Peter Clausen 6216a17a076SLars-Peter Clausen static inline int ad5064_spi_register_driver(void) { return 0; } 6226a17a076SLars-Peter Clausen static inline void ad5064_spi_unregister_driver(void) { } 6236a17a076SLars-Peter Clausen 6246a17a076SLars-Peter Clausen #endif 6256a17a076SLars-Peter Clausen 6266a17a076SLars-Peter Clausen #if IS_ENABLED(CONFIG_I2C) 6276a17a076SLars-Peter Clausen 6289660ac70SLars-Peter Clausen static int ad5064_i2c_write(struct ad5064_state *st, unsigned int cmd, 6299660ac70SLars-Peter Clausen unsigned int addr, unsigned int val) 6309660ac70SLars-Peter Clausen { 6319660ac70SLars-Peter Clausen struct i2c_client *i2c = to_i2c_client(st->dev); 63203fe472eSMichael Hennerich int ret; 6339660ac70SLars-Peter Clausen 6349660ac70SLars-Peter Clausen st->data.i2c[0] = (cmd << 4) | addr; 6359660ac70SLars-Peter Clausen put_unaligned_be16(val, &st->data.i2c[1]); 63603fe472eSMichael Hennerich 63703fe472eSMichael Hennerich ret = i2c_master_send(i2c, st->data.i2c, 3); 63803fe472eSMichael Hennerich if (ret < 0) 63903fe472eSMichael Hennerich return ret; 64003fe472eSMichael Hennerich 64103fe472eSMichael Hennerich return 0; 6429660ac70SLars-Peter Clausen } 6439660ac70SLars-Peter Clausen 644fc52692cSGreg Kroah-Hartman static int ad5064_i2c_probe(struct i2c_client *i2c, 6456a17a076SLars-Peter Clausen const struct i2c_device_id *id) 6466a17a076SLars-Peter Clausen { 6476a17a076SLars-Peter Clausen return ad5064_probe(&i2c->dev, id->driver_data, id->name, 6486a17a076SLars-Peter Clausen ad5064_i2c_write); 6496a17a076SLars-Peter Clausen } 6506a17a076SLars-Peter Clausen 651fc52692cSGreg Kroah-Hartman static int ad5064_i2c_remove(struct i2c_client *i2c) 6526a17a076SLars-Peter Clausen { 6536a17a076SLars-Peter Clausen return ad5064_remove(&i2c->dev); 6546a17a076SLars-Peter Clausen } 6556a17a076SLars-Peter Clausen 6566a17a076SLars-Peter Clausen static const struct i2c_device_id ad5064_i2c_ids[] = { 657*5dcbe97bSLars-Peter Clausen {"ad5629-1", ID_AD5629_1}, 658*5dcbe97bSLars-Peter Clausen {"ad5629-2", ID_AD5629_2}, 659*5dcbe97bSLars-Peter Clausen {"ad5629-3", ID_AD5629_2}, /* similar enough to ad5629-2 */ 660*5dcbe97bSLars-Peter Clausen {"ad5669-1", ID_AD5669_1}, 661*5dcbe97bSLars-Peter Clausen {"ad5669-2", ID_AD5669_2}, 662*5dcbe97bSLars-Peter Clausen {"ad5669-3", ID_AD5669_2}, /* similar enough to ad5669-2 */ 6636a17a076SLars-Peter Clausen {} 6646a17a076SLars-Peter Clausen }; 6656a17a076SLars-Peter Clausen MODULE_DEVICE_TABLE(i2c, ad5064_i2c_ids); 6666a17a076SLars-Peter Clausen 6676a17a076SLars-Peter Clausen static struct i2c_driver ad5064_i2c_driver = { 6686a17a076SLars-Peter Clausen .driver = { 6696a17a076SLars-Peter Clausen .name = "ad5064", 6706a17a076SLars-Peter Clausen }, 6716a17a076SLars-Peter Clausen .probe = ad5064_i2c_probe, 672fc52692cSGreg Kroah-Hartman .remove = ad5064_i2c_remove, 6736a17a076SLars-Peter Clausen .id_table = ad5064_i2c_ids, 6746a17a076SLars-Peter Clausen }; 6756a17a076SLars-Peter Clausen 6766a17a076SLars-Peter Clausen static int __init ad5064_i2c_register_driver(void) 6776a17a076SLars-Peter Clausen { 6786a17a076SLars-Peter Clausen return i2c_add_driver(&ad5064_i2c_driver); 6796a17a076SLars-Peter Clausen } 6806a17a076SLars-Peter Clausen 6816a17a076SLars-Peter Clausen static void __exit ad5064_i2c_unregister_driver(void) 6826a17a076SLars-Peter Clausen { 6836a17a076SLars-Peter Clausen i2c_del_driver(&ad5064_i2c_driver); 6846a17a076SLars-Peter Clausen } 6856a17a076SLars-Peter Clausen 6866a17a076SLars-Peter Clausen #else 6876a17a076SLars-Peter Clausen 6886a17a076SLars-Peter Clausen static inline int ad5064_i2c_register_driver(void) { return 0; } 6896a17a076SLars-Peter Clausen static inline void ad5064_i2c_unregister_driver(void) { } 6906a17a076SLars-Peter Clausen 6916a17a076SLars-Peter Clausen #endif 6926a17a076SLars-Peter Clausen 6936a17a076SLars-Peter Clausen static int __init ad5064_init(void) 6946a17a076SLars-Peter Clausen { 6956a17a076SLars-Peter Clausen int ret; 6966a17a076SLars-Peter Clausen 6976a17a076SLars-Peter Clausen ret = ad5064_spi_register_driver(); 6986a17a076SLars-Peter Clausen if (ret) 6996a17a076SLars-Peter Clausen return ret; 7006a17a076SLars-Peter Clausen 7016a17a076SLars-Peter Clausen ret = ad5064_i2c_register_driver(); 7026a17a076SLars-Peter Clausen if (ret) { 7036a17a076SLars-Peter Clausen ad5064_spi_unregister_driver(); 7046a17a076SLars-Peter Clausen return ret; 7056a17a076SLars-Peter Clausen } 7066a17a076SLars-Peter Clausen 7076a17a076SLars-Peter Clausen return 0; 7086a17a076SLars-Peter Clausen } 7096a17a076SLars-Peter Clausen module_init(ad5064_init); 7106a17a076SLars-Peter Clausen 7116a17a076SLars-Peter Clausen static void __exit ad5064_exit(void) 7126a17a076SLars-Peter Clausen { 7136a17a076SLars-Peter Clausen ad5064_i2c_unregister_driver(); 7146a17a076SLars-Peter Clausen ad5064_spi_unregister_driver(); 7156a17a076SLars-Peter Clausen } 7166a17a076SLars-Peter Clausen module_exit(ad5064_exit); 717dbdc025bSLars-Peter Clausen 718dbdc025bSLars-Peter Clausen MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); 7196a17a076SLars-Peter Clausen MODULE_DESCRIPTION("Analog Devices AD5024 and similar multi-channel DACs"); 720dbdc025bSLars-Peter Clausen MODULE_LICENSE("GPL v2"); 721