Loading drivers/iio/adc/Kconfig +10 −0 Original line number Diff line number Diff line Loading @@ -3,6 +3,16 @@ # menu "Analog to digital converters" config AD7266 tristate "Analog Devices AD7265/AD7266 ADC driver" depends on SPI_MASTER select IIO_BUFFER select IIO_TRIGGER select IIO_TRIGGERED_BUFFER help Say yes here to build support for Analog Devices AD7265 and AD7266 ADCs. config AT91_ADC tristate "Atmel AT91 ADC" depends on ARCH_AT91 Loading drivers/iio/adc/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -2,4 +2,5 @@ # Makefile for IIO ADC drivers # obj-$(CONFIG_AD7266) += ad7266.o obj-$(CONFIG_AT91_ADC) += at91_adc.o drivers/iio/adc/ad7266.c 0 → 100644 +536 −0 Original line number Diff line number Diff line /* * AD7266/65 SPI ADC driver * * Copyright 2012 Analog Devices Inc. * * Licensed under the GPL-2. */ #include <linux/device.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/regulator/consumer.h> #include <linux/err.h> #include <linux/gpio.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/iio/iio.h> #include <linux/iio/buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include <linux/platform_data/ad7266.h> struct ad7266_state { struct spi_device *spi; struct regulator *reg; unsigned long vref_uv; struct spi_transfer single_xfer[3]; struct spi_message single_msg; enum ad7266_range range; enum ad7266_mode mode; bool fixed_addr; struct gpio gpios[3]; /* * DMA (thus cache coherency maintenance) requires the * transfer buffers to live in their own cache lines. * The buffer needs to be large enough to hold two samples (4 bytes) and * the naturally aligned timestamp (8 bytes). */ uint8_t data[ALIGN(4, sizeof(s64)) + sizeof(s64)] ____cacheline_aligned; }; static int ad7266_wakeup(struct ad7266_state *st) { /* Any read with >= 2 bytes will wake the device */ return spi_read(st->spi, st->data, 2); } static int ad7266_powerdown(struct ad7266_state *st) { /* Any read with < 2 bytes will powerdown the device */ return spi_read(st->spi, st->data, 1); } static int ad7266_preenable(struct iio_dev *indio_dev) { struct ad7266_state *st = iio_priv(indio_dev); int ret; ret = ad7266_wakeup(st); if (ret) return ret; ret = iio_sw_buffer_preenable(indio_dev); if (ret) ad7266_powerdown(st); return ret; } static int ad7266_postdisable(struct iio_dev *indio_dev) { struct ad7266_state *st = iio_priv(indio_dev); return ad7266_powerdown(st); } static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { .preenable = &ad7266_preenable, .postenable = &iio_triggered_buffer_postenable, .predisable = &iio_triggered_buffer_predisable, .postdisable = &ad7266_postdisable, }; static irqreturn_t ad7266_trigger_handler(int irq, void *p) { struct iio_poll_func *pf = p; struct iio_dev *indio_dev = pf->indio_dev; struct iio_buffer *buffer = indio_dev->buffer; struct ad7266_state *st = iio_priv(indio_dev); int ret; ret = spi_read(st->spi, st->data, 4); if (ret == 0) { if (indio_dev->scan_timestamp) ((s64 *)st->data)[1] = pf->timestamp; iio_push_to_buffer(buffer, (u8 *)st->data, pf->timestamp); } iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; } static void ad7266_select_input(struct ad7266_state *st, unsigned int nr) { unsigned int i; if (st->fixed_addr) return; switch (st->mode) { case AD7266_MODE_SINGLE_ENDED: nr >>= 1; break; case AD7266_MODE_PSEUDO_DIFF: nr |= 1; break; case AD7266_MODE_DIFF: nr &= ~1; break; } for (i = 0; i < 3; ++i) gpio_set_value(st->gpios[i].gpio, (bool)(nr & BIT(i))); } static int ad7266_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { struct ad7266_state *st = iio_priv(indio_dev); unsigned int nr = find_first_bit(scan_mask, indio_dev->masklength); ad7266_select_input(st, nr); return 0; } static int ad7266_read_single(struct ad7266_state *st, int *val, unsigned int address) { int ret; ad7266_select_input(st, address); ret = spi_sync(st->spi, &st->single_msg); *val = be16_to_cpu(st->data[address % 2]); return ret; } static int ad7266_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { struct ad7266_state *st = iio_priv(indio_dev); unsigned long scale_uv; int ret; switch (m) { case IIO_CHAN_INFO_RAW: if (iio_buffer_enabled(indio_dev)) return -EBUSY; ret = ad7266_read_single(st, val, chan->address); if (ret) return ret; *val = (*val >> 2) & 0xfff; if (chan->scan_type.sign == 's') *val = sign_extend32(*val, 11); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: scale_uv = (st->vref_uv * 100); if (st->mode == AD7266_MODE_DIFF) scale_uv *= 2; if (st->range == AD7266_RANGE_2VREF) scale_uv *= 2; scale_uv >>= chan->scan_type.realbits; *val = scale_uv / 100000; *val2 = (scale_uv % 100000) * 10; return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_OFFSET: if (st->range == AD7266_RANGE_2VREF && st->mode != AD7266_MODE_DIFF) *val = 2048; else *val = 0; return IIO_VAL_INT; } return -EINVAL; } #define AD7266_CHAN(_chan, _sign) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = (_chan), \ .address = (_chan), \ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT \ | IIO_CHAN_INFO_SCALE_SHARED_BIT \ | IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ .scan_index = (_chan), \ .scan_type = { \ .sign = (_sign), \ .realbits = 12, \ .storagebits = 16, \ .shift = 2, \ .endianness = IIO_BE, \ }, \ } #define AD7266_DECLARE_SINGLE_ENDED_CHANNELS(_name, _sign) \ const struct iio_chan_spec ad7266_channels_##_name[] = { \ AD7266_CHAN(0, (_sign)), \ AD7266_CHAN(1, (_sign)), \ AD7266_CHAN(2, (_sign)), \ AD7266_CHAN(3, (_sign)), \ AD7266_CHAN(4, (_sign)), \ AD7266_CHAN(5, (_sign)), \ AD7266_CHAN(6, (_sign)), \ AD7266_CHAN(7, (_sign)), \ AD7266_CHAN(8, (_sign)), \ AD7266_CHAN(9, (_sign)), \ AD7266_CHAN(10, (_sign)), \ AD7266_CHAN(11, (_sign)), \ IIO_CHAN_SOFT_TIMESTAMP(13), \ } #define AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(_name, _sign) \ const struct iio_chan_spec ad7266_channels_##_name##_fixed[] = { \ AD7266_CHAN(0, (_sign)), \ AD7266_CHAN(1, (_sign)), \ IIO_CHAN_SOFT_TIMESTAMP(2), \ } static AD7266_DECLARE_SINGLE_ENDED_CHANNELS(u, 'u'); static AD7266_DECLARE_SINGLE_ENDED_CHANNELS(s, 's'); static AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(u, 'u'); static AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(s, 's'); #define AD7266_CHAN_DIFF(_chan, _sign) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = (_chan) * 2, \ .channel2 = (_chan) * 2 + 1, \ .address = (_chan), \ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT \ | IIO_CHAN_INFO_SCALE_SHARED_BIT \ | IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ .scan_index = (_chan), \ .scan_type = { \ .sign = _sign, \ .realbits = 12, \ .storagebits = 16, \ .shift = 2, \ .endianness = IIO_BE, \ }, \ .differential = 1, \ } #define AD7266_DECLARE_DIFF_CHANNELS(_name, _sign) \ const struct iio_chan_spec ad7266_channels_diff_##_name[] = { \ AD7266_CHAN_DIFF(0, (_sign)), \ AD7266_CHAN_DIFF(1, (_sign)), \ AD7266_CHAN_DIFF(2, (_sign)), \ AD7266_CHAN_DIFF(3, (_sign)), \ AD7266_CHAN_DIFF(4, (_sign)), \ AD7266_CHAN_DIFF(5, (_sign)), \ IIO_CHAN_SOFT_TIMESTAMP(6), \ } static AD7266_DECLARE_DIFF_CHANNELS(s, 's'); static AD7266_DECLARE_DIFF_CHANNELS(u, 'u'); #define AD7266_DECLARE_DIFF_CHANNELS_FIXED(_name, _sign) \ const struct iio_chan_spec ad7266_channels_diff_fixed_##_name[] = { \ AD7266_CHAN_DIFF(0, (_sign)), \ AD7266_CHAN_DIFF(1, (_sign)), \ IIO_CHAN_SOFT_TIMESTAMP(2), \ } static AD7266_DECLARE_DIFF_CHANNELS_FIXED(s, 's'); static AD7266_DECLARE_DIFF_CHANNELS_FIXED(u, 'u'); static const struct iio_info ad7266_info = { .read_raw = &ad7266_read_raw, .update_scan_mode = &ad7266_update_scan_mode, .driver_module = THIS_MODULE, }; static unsigned long ad7266_available_scan_masks[] = { 0x003, 0x00c, 0x030, 0x0c0, 0x300, 0xc00, 0x000, }; static unsigned long ad7266_available_scan_masks_diff[] = { 0x003, 0x00c, 0x030, 0x000, }; static unsigned long ad7266_available_scan_masks_fixed[] = { 0x003, 0x000, }; struct ad7266_chan_info { const struct iio_chan_spec *channels; unsigned int num_channels; unsigned long *scan_masks; }; #define AD7266_CHAN_INFO_INDEX(_differential, _signed, _fixed) \ (((_differential) << 2) | ((_signed) << 1) | ((_fixed) << 0)) static const struct ad7266_chan_info ad7266_chan_infos[] = { [AD7266_CHAN_INFO_INDEX(0, 0, 0)] = { .channels = ad7266_channels_u, .num_channels = ARRAY_SIZE(ad7266_channels_u), .scan_masks = ad7266_available_scan_masks, }, [AD7266_CHAN_INFO_INDEX(0, 0, 1)] = { .channels = ad7266_channels_u_fixed, .num_channels = ARRAY_SIZE(ad7266_channels_u_fixed), .scan_masks = ad7266_available_scan_masks_fixed, }, [AD7266_CHAN_INFO_INDEX(0, 1, 0)] = { .channels = ad7266_channels_s, .num_channels = ARRAY_SIZE(ad7266_channels_s), .scan_masks = ad7266_available_scan_masks, }, [AD7266_CHAN_INFO_INDEX(0, 1, 1)] = { .channels = ad7266_channels_s_fixed, .num_channels = ARRAY_SIZE(ad7266_channels_s_fixed), .scan_masks = ad7266_available_scan_masks_fixed, }, [AD7266_CHAN_INFO_INDEX(1, 0, 0)] = { .channels = ad7266_channels_diff_u, .num_channels = ARRAY_SIZE(ad7266_channels_diff_u), .scan_masks = ad7266_available_scan_masks_diff, }, [AD7266_CHAN_INFO_INDEX(1, 0, 1)] = { .channels = ad7266_channels_diff_fixed_u, .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_u), .scan_masks = ad7266_available_scan_masks_fixed, }, [AD7266_CHAN_INFO_INDEX(1, 1, 0)] = { .channels = ad7266_channels_diff_s, .num_channels = ARRAY_SIZE(ad7266_channels_diff_s), .scan_masks = ad7266_available_scan_masks_diff, }, [AD7266_CHAN_INFO_INDEX(1, 1, 1)] = { .channels = ad7266_channels_diff_fixed_s, .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_s), .scan_masks = ad7266_available_scan_masks_fixed, }, }; static void __devinit ad7266_init_channels(struct iio_dev *indio_dev) { struct ad7266_state *st = iio_priv(indio_dev); bool is_differential, is_signed; const struct ad7266_chan_info *chan_info; int i; is_differential = st->mode != AD7266_MODE_SINGLE_ENDED; is_signed = (st->range == AD7266_RANGE_2VREF) | (st->mode == AD7266_MODE_DIFF); i = AD7266_CHAN_INFO_INDEX(is_differential, is_signed, st->fixed_addr); chan_info = &ad7266_chan_infos[i]; indio_dev->channels = chan_info->channels; indio_dev->num_channels = chan_info->num_channels; indio_dev->available_scan_masks = chan_info->scan_masks; indio_dev->masklength = chan_info->num_channels - 1; } static const char * const ad7266_gpio_labels[] = { "AD0", "AD1", "AD2", }; static int __devinit ad7266_probe(struct spi_device *spi) { struct ad7266_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; struct ad7266_state *st; unsigned int i; int ret; indio_dev = iio_device_alloc(sizeof(*st)); if (indio_dev == NULL) return -ENOMEM; st = iio_priv(indio_dev); st->reg = regulator_get(&spi->dev, "vref"); if (!IS_ERR_OR_NULL(st->reg)) { ret = regulator_enable(st->reg); if (ret) goto error_put_reg; st->vref_uv = regulator_get_voltage(st->reg); } else { /* Use internal reference */ st->vref_uv = 2500000; } if (pdata) { st->fixed_addr = pdata->fixed_addr; st->mode = pdata->mode; st->range = pdata->range; if (!st->fixed_addr) { for (i = 0; i < ARRAY_SIZE(st->gpios); ++i) { st->gpios[i].gpio = pdata->addr_gpios[i]; st->gpios[i].flags = GPIOF_OUT_INIT_LOW; st->gpios[i].label = ad7266_gpio_labels[i]; } ret = gpio_request_array(st->gpios, ARRAY_SIZE(st->gpios)); if (ret) goto error_disable_reg; } } else { st->fixed_addr = true; st->range = AD7266_RANGE_VREF; st->mode = AD7266_MODE_DIFF; } spi_set_drvdata(spi, indio_dev); st->spi = spi; indio_dev->dev.parent = &spi->dev; indio_dev->name = spi_get_device_id(spi)->name; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &ad7266_info; ad7266_init_channels(indio_dev); /* wakeup */ st->single_xfer[0].rx_buf = &st->data; st->single_xfer[0].len = 2; st->single_xfer[0].cs_change = 1; /* conversion */ st->single_xfer[1].rx_buf = &st->data; st->single_xfer[1].len = 4; st->single_xfer[1].cs_change = 1; /* powerdown */ st->single_xfer[2].tx_buf = &st->data; st->single_xfer[2].len = 1; spi_message_init(&st->single_msg); spi_message_add_tail(&st->single_xfer[0], &st->single_msg); spi_message_add_tail(&st->single_xfer[1], &st->single_msg); spi_message_add_tail(&st->single_xfer[2], &st->single_msg); ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, &ad7266_trigger_handler, &iio_triggered_buffer_setup_ops); if (ret) goto error_free_gpios; ret = iio_device_register(indio_dev); if (ret) goto error_buffer_cleanup; return 0; error_buffer_cleanup: iio_triggered_buffer_cleanup(indio_dev); error_free_gpios: if (!st->fixed_addr) gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); error_disable_reg: if (!IS_ERR_OR_NULL(st->reg)) regulator_disable(st->reg); error_put_reg: if (!IS_ERR_OR_NULL(st->reg)) regulator_put(st->reg); iio_device_free(indio_dev); return ret; } static int __devexit ad7266_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad7266_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); iio_triggered_buffer_cleanup(indio_dev); if (!st->fixed_addr) gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); if (!IS_ERR_OR_NULL(st->reg)) { regulator_disable(st->reg); regulator_put(st->reg); } iio_device_free(indio_dev); return 0; } static const struct spi_device_id ad7266_id[] = { {"ad7265", 0}, {"ad7266", 0}, { } }; MODULE_DEVICE_TABLE(spi, ad7266_id); static struct spi_driver ad7266_driver = { .driver = { .name = "ad7266", .owner = THIS_MODULE, }, .probe = ad7266_probe, .remove = __devexit_p(ad7266_remove), .id_table = ad7266_id, }; module_spi_driver(ad7266_driver); MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); MODULE_DESCRIPTION("Analog Devices AD7266/65 ADC"); MODULE_LICENSE("GPL v2"); drivers/iio/dac/Kconfig +4 −4 Original line number Diff line number Diff line Loading @@ -4,12 +4,12 @@ menu "Digital to analog converters" config AD5064 tristate "Analog Devices AD5064/64-1/65/44/45/24/25, AD5628/48/66/68 DAC driver" depends on SPI tristate "Analog Devices AD5064 and similar multi-channel DAC driver" depends on (SPI_MASTER || I2C) help Say yes here to build support for Analog Devices AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5648, AD5666, AD5668 Digital to Analog Converter. AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5629R, AD5648, AD5666, AD5668, AD5669R Digital to Analog Converter. To compile this driver as a module, choose M here: the module will be called ad5064. Loading drivers/iio/dac/ad5064.c +169 −31 Original line number Diff line number Diff line /* * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5648, * AD5666, AD5668 Digital to analog converters driver * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5629R, * AD5648, AD5666, AD5668, AD5669R Digital to analog converters driver * * Copyright 2011 Analog Devices Inc. * Loading @@ -12,9 +12,11 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/spi/spi.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/regulator/consumer.h> #include <asm/unaligned.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> Loading Loading @@ -62,9 +64,14 @@ struct ad5064_chip_info { unsigned int num_channels; }; struct ad5064_state; typedef int (*ad5064_write_func)(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val); /** * struct ad5064_state - driver instance specific data * @spi: spi_device * @dev: the device for this driver instance * @chip_info: chip model specific constants, available modes etc * @vref_reg: vref supply regulators * @pwr_down: whether channel is powered down Loading @@ -72,11 +79,12 @@ struct ad5064_chip_info { * @dac_cache: current DAC raw value (chip does not support readback) * @use_internal_vref: set to true if the internal reference voltage should be * used. * @data: spi transfer buffers * @write: register write callback * @data: i2c/spi transfer buffers */ struct ad5064_state { struct spi_device *spi; struct device *dev; const struct ad5064_chip_info *chip_info; struct regulator_bulk_data vref_reg[AD5064_MAX_VREFS]; bool pwr_down[AD5064_MAX_DAC_CHANNELS]; Loading @@ -84,11 +92,16 @@ struct ad5064_state { unsigned int dac_cache[AD5064_MAX_DAC_CHANNELS]; bool use_internal_vref; ad5064_write_func write; /* * DMA (thus cache coherency maintenance) requires the * transfer buffers to live in their own cache lines. */ __be32 data ____cacheline_aligned; union { u8 i2c[3]; __be32 spi; } data ____cacheline_aligned; }; enum ad5064_type { Loading @@ -109,14 +122,31 @@ enum ad5064_type { ID_AD5668_2, }; static int ad5064_i2c_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val) { struct i2c_client *i2c = to_i2c_client(st->dev); st->data.i2c[0] = (cmd << 4) | addr; put_unaligned_be16(val, &st->data.i2c[1]); return i2c_master_send(i2c, st->data.i2c, 3); } static int ad5064_spi_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val) { struct spi_device *spi = to_spi_device(st->dev); st->data.spi = cpu_to_be32(AD5064_CMD(cmd) | AD5064_ADDR(addr) | val); return spi_write(spi, &st->data.spi, sizeof(st->data.spi)); } static int ad5064_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val, unsigned int shift) { val <<= shift; st->data = cpu_to_be32(AD5064_CMD(cmd) | AD5064_ADDR(addr) | val); return spi_write(st->spi, &st->data, sizeof(st->data)); return st->write(st, cmd, addr, val); } static int ad5064_sync_powerdown_mode(struct ad5064_state *st, Loading @@ -130,7 +160,7 @@ static int ad5064_sync_powerdown_mode(struct ad5064_state *st, if (st->pwr_down[channel]) val |= st->pwr_down_mode[channel] << 8; ret = ad5064_spi_write(st, AD5064_CMD_POWERDOWN_DAC, 0, val, 0); ret = ad5064_write(st, AD5064_CMD_POWERDOWN_DAC, 0, val, 0); return ret; } Loading Loading @@ -251,7 +281,7 @@ static int ad5064_write_raw(struct iio_dev *indio_dev, return -EINVAL; mutex_lock(&indio_dev->mlock); ret = ad5064_spi_write(st, AD5064_CMD_WRITE_INPUT_N_UPDATE_N, ret = ad5064_write(st, AD5064_CMD_WRITE_INPUT_N_UPDATE_N, chan->address, val, chan->scan_type.shift); if (ret == 0) st->dac_cache[chan->channel] = val; Loading Loading @@ -413,9 +443,9 @@ static const char * const ad5064_vref_name(struct ad5064_state *st, return st->chip_info->shared_vref ? "vref" : ad5064_vref_names[vref]; } static int __devinit ad5064_probe(struct spi_device *spi) static int __devinit ad5064_probe(struct device *dev, enum ad5064_type type, const char *name, ad5064_write_func write) { enum ad5064_type type = spi_get_device_id(spi)->driver_data; struct iio_dev *indio_dev; struct ad5064_state *st; unsigned int i; Loading @@ -426,24 +456,25 @@ static int __devinit ad5064_probe(struct spi_device *spi) return -ENOMEM; st = iio_priv(indio_dev); spi_set_drvdata(spi, indio_dev); dev_set_drvdata(dev, indio_dev); st->chip_info = &ad5064_chip_info_tbl[type]; st->spi = spi; st->dev = dev; st->write = write; for (i = 0; i < ad5064_num_vref(st); ++i) st->vref_reg[i].supply = ad5064_vref_name(st, i); ret = regulator_bulk_get(&st->spi->dev, ad5064_num_vref(st), ret = regulator_bulk_get(dev, ad5064_num_vref(st), st->vref_reg); if (ret) { if (!st->chip_info->internal_vref) goto error_free; st->use_internal_vref = true; ret = ad5064_spi_write(st, AD5064_CMD_CONFIG, 0, ret = ad5064_write(st, AD5064_CMD_CONFIG, 0, AD5064_CONFIG_INT_VREF_ENABLE, 0); if (ret) { dev_err(&spi->dev, "Failed to enable internal vref: %d\n", dev_err(dev, "Failed to enable internal vref: %d\n", ret); goto error_free; } Loading @@ -458,8 +489,8 @@ static int __devinit ad5064_probe(struct spi_device *spi) st->dac_cache[i] = 0x8000; } 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 = &ad5064_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = st->chip_info->channels; Loading @@ -483,10 +514,9 @@ error_free: return ret; } static int __devexit ad5064_remove(struct spi_device *spi) static int __devexit ad5064_remove(struct device *dev) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5064_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); Loading @@ -501,7 +531,22 @@ static int __devexit ad5064_remove(struct spi_device *spi) return 0; } static const struct spi_device_id ad5064_id[] = { #if IS_ENABLED(CONFIG_SPI_MASTER) static int __devinit ad5064_spi_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); return ad5064_probe(&spi->dev, id->driver_data, id->name, ad5064_spi_write); } static int __devexit ad5064_spi_remove(struct spi_device *spi) { return ad5064_remove(&spi->dev); } static const struct spi_device_id ad5064_spi_ids[] = { {"ad5024", ID_AD5024}, {"ad5025", ID_AD5025}, {"ad5044", ID_AD5044}, Loading @@ -520,19 +565,112 @@ static const struct spi_device_id ad5064_id[] = { {"ad5668-3", ID_AD5668_2}, /* similar enough to ad5668-2 */ {} }; MODULE_DEVICE_TABLE(spi, ad5064_id); MODULE_DEVICE_TABLE(spi, ad5064_spi_ids); static struct spi_driver ad5064_driver = { static struct spi_driver ad5064_spi_driver = { .driver = { .name = "ad5064", .owner = THIS_MODULE, }, .probe = ad5064_probe, .remove = __devexit_p(ad5064_remove), .id_table = ad5064_id, .probe = ad5064_spi_probe, .remove = __devexit_p(ad5064_spi_remove), .id_table = ad5064_spi_ids, }; module_spi_driver(ad5064_driver); static int __init ad5064_spi_register_driver(void) { return spi_register_driver(&ad5064_spi_driver); } static void __exit ad5064_spi_unregister_driver(void) { spi_unregister_driver(&ad5064_spi_driver); } #else static inline int ad5064_spi_register_driver(void) { return 0; } static inline void ad5064_spi_unregister_driver(void) { } #endif #if IS_ENABLED(CONFIG_I2C) static int __devinit ad5064_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { return ad5064_probe(&i2c->dev, id->driver_data, id->name, ad5064_i2c_write); } static int __devexit ad5064_i2c_remove(struct i2c_client *i2c) { return ad5064_remove(&i2c->dev); } static const struct i2c_device_id ad5064_i2c_ids[] = { {"ad5629-1", ID_AD5628_1}, {"ad5629-2", ID_AD5628_2}, {"ad5629-3", ID_AD5628_2}, /* similar enough to ad5629-2 */ {"ad5669-1", ID_AD5668_1}, {"ad5669-2", ID_AD5668_2}, {"ad5669-3", ID_AD5668_2}, /* similar enough to ad5669-2 */ {} }; MODULE_DEVICE_TABLE(i2c, ad5064_i2c_ids); static struct i2c_driver ad5064_i2c_driver = { .driver = { .name = "ad5064", .owner = THIS_MODULE, }, .probe = ad5064_i2c_probe, .remove = __devexit_p(ad5064_i2c_remove), .id_table = ad5064_i2c_ids, }; static int __init ad5064_i2c_register_driver(void) { return i2c_add_driver(&ad5064_i2c_driver); } static void __exit ad5064_i2c_unregister_driver(void) { i2c_del_driver(&ad5064_i2c_driver); } #else static inline int ad5064_i2c_register_driver(void) { return 0; } static inline void ad5064_i2c_unregister_driver(void) { } #endif static int __init ad5064_init(void) { int ret; ret = ad5064_spi_register_driver(); if (ret) return ret; ret = ad5064_i2c_register_driver(); if (ret) { ad5064_spi_unregister_driver(); return ret; } return 0; } module_init(ad5064_init); static void __exit ad5064_exit(void) { ad5064_i2c_unregister_driver(); ad5064_spi_unregister_driver(); } module_exit(ad5064_exit); MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); MODULE_DESCRIPTION("Analog Devices AD5024/25/44/45/64/64-1/65, AD5628/48/66/68 DAC"); MODULE_DESCRIPTION("Analog Devices AD5024 and similar multi-channel DACs"); MODULE_LICENSE("GPL v2"); Loading
drivers/iio/adc/Kconfig +10 −0 Original line number Diff line number Diff line Loading @@ -3,6 +3,16 @@ # menu "Analog to digital converters" config AD7266 tristate "Analog Devices AD7265/AD7266 ADC driver" depends on SPI_MASTER select IIO_BUFFER select IIO_TRIGGER select IIO_TRIGGERED_BUFFER help Say yes here to build support for Analog Devices AD7265 and AD7266 ADCs. config AT91_ADC tristate "Atmel AT91 ADC" depends on ARCH_AT91 Loading
drivers/iio/adc/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -2,4 +2,5 @@ # Makefile for IIO ADC drivers # obj-$(CONFIG_AD7266) += ad7266.o obj-$(CONFIG_AT91_ADC) += at91_adc.o
drivers/iio/adc/ad7266.c 0 → 100644 +536 −0 Original line number Diff line number Diff line /* * AD7266/65 SPI ADC driver * * Copyright 2012 Analog Devices Inc. * * Licensed under the GPL-2. */ #include <linux/device.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/regulator/consumer.h> #include <linux/err.h> #include <linux/gpio.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/iio/iio.h> #include <linux/iio/buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include <linux/platform_data/ad7266.h> struct ad7266_state { struct spi_device *spi; struct regulator *reg; unsigned long vref_uv; struct spi_transfer single_xfer[3]; struct spi_message single_msg; enum ad7266_range range; enum ad7266_mode mode; bool fixed_addr; struct gpio gpios[3]; /* * DMA (thus cache coherency maintenance) requires the * transfer buffers to live in their own cache lines. * The buffer needs to be large enough to hold two samples (4 bytes) and * the naturally aligned timestamp (8 bytes). */ uint8_t data[ALIGN(4, sizeof(s64)) + sizeof(s64)] ____cacheline_aligned; }; static int ad7266_wakeup(struct ad7266_state *st) { /* Any read with >= 2 bytes will wake the device */ return spi_read(st->spi, st->data, 2); } static int ad7266_powerdown(struct ad7266_state *st) { /* Any read with < 2 bytes will powerdown the device */ return spi_read(st->spi, st->data, 1); } static int ad7266_preenable(struct iio_dev *indio_dev) { struct ad7266_state *st = iio_priv(indio_dev); int ret; ret = ad7266_wakeup(st); if (ret) return ret; ret = iio_sw_buffer_preenable(indio_dev); if (ret) ad7266_powerdown(st); return ret; } static int ad7266_postdisable(struct iio_dev *indio_dev) { struct ad7266_state *st = iio_priv(indio_dev); return ad7266_powerdown(st); } static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { .preenable = &ad7266_preenable, .postenable = &iio_triggered_buffer_postenable, .predisable = &iio_triggered_buffer_predisable, .postdisable = &ad7266_postdisable, }; static irqreturn_t ad7266_trigger_handler(int irq, void *p) { struct iio_poll_func *pf = p; struct iio_dev *indio_dev = pf->indio_dev; struct iio_buffer *buffer = indio_dev->buffer; struct ad7266_state *st = iio_priv(indio_dev); int ret; ret = spi_read(st->spi, st->data, 4); if (ret == 0) { if (indio_dev->scan_timestamp) ((s64 *)st->data)[1] = pf->timestamp; iio_push_to_buffer(buffer, (u8 *)st->data, pf->timestamp); } iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; } static void ad7266_select_input(struct ad7266_state *st, unsigned int nr) { unsigned int i; if (st->fixed_addr) return; switch (st->mode) { case AD7266_MODE_SINGLE_ENDED: nr >>= 1; break; case AD7266_MODE_PSEUDO_DIFF: nr |= 1; break; case AD7266_MODE_DIFF: nr &= ~1; break; } for (i = 0; i < 3; ++i) gpio_set_value(st->gpios[i].gpio, (bool)(nr & BIT(i))); } static int ad7266_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { struct ad7266_state *st = iio_priv(indio_dev); unsigned int nr = find_first_bit(scan_mask, indio_dev->masklength); ad7266_select_input(st, nr); return 0; } static int ad7266_read_single(struct ad7266_state *st, int *val, unsigned int address) { int ret; ad7266_select_input(st, address); ret = spi_sync(st->spi, &st->single_msg); *val = be16_to_cpu(st->data[address % 2]); return ret; } static int ad7266_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { struct ad7266_state *st = iio_priv(indio_dev); unsigned long scale_uv; int ret; switch (m) { case IIO_CHAN_INFO_RAW: if (iio_buffer_enabled(indio_dev)) return -EBUSY; ret = ad7266_read_single(st, val, chan->address); if (ret) return ret; *val = (*val >> 2) & 0xfff; if (chan->scan_type.sign == 's') *val = sign_extend32(*val, 11); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: scale_uv = (st->vref_uv * 100); if (st->mode == AD7266_MODE_DIFF) scale_uv *= 2; if (st->range == AD7266_RANGE_2VREF) scale_uv *= 2; scale_uv >>= chan->scan_type.realbits; *val = scale_uv / 100000; *val2 = (scale_uv % 100000) * 10; return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_OFFSET: if (st->range == AD7266_RANGE_2VREF && st->mode != AD7266_MODE_DIFF) *val = 2048; else *val = 0; return IIO_VAL_INT; } return -EINVAL; } #define AD7266_CHAN(_chan, _sign) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = (_chan), \ .address = (_chan), \ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT \ | IIO_CHAN_INFO_SCALE_SHARED_BIT \ | IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ .scan_index = (_chan), \ .scan_type = { \ .sign = (_sign), \ .realbits = 12, \ .storagebits = 16, \ .shift = 2, \ .endianness = IIO_BE, \ }, \ } #define AD7266_DECLARE_SINGLE_ENDED_CHANNELS(_name, _sign) \ const struct iio_chan_spec ad7266_channels_##_name[] = { \ AD7266_CHAN(0, (_sign)), \ AD7266_CHAN(1, (_sign)), \ AD7266_CHAN(2, (_sign)), \ AD7266_CHAN(3, (_sign)), \ AD7266_CHAN(4, (_sign)), \ AD7266_CHAN(5, (_sign)), \ AD7266_CHAN(6, (_sign)), \ AD7266_CHAN(7, (_sign)), \ AD7266_CHAN(8, (_sign)), \ AD7266_CHAN(9, (_sign)), \ AD7266_CHAN(10, (_sign)), \ AD7266_CHAN(11, (_sign)), \ IIO_CHAN_SOFT_TIMESTAMP(13), \ } #define AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(_name, _sign) \ const struct iio_chan_spec ad7266_channels_##_name##_fixed[] = { \ AD7266_CHAN(0, (_sign)), \ AD7266_CHAN(1, (_sign)), \ IIO_CHAN_SOFT_TIMESTAMP(2), \ } static AD7266_DECLARE_SINGLE_ENDED_CHANNELS(u, 'u'); static AD7266_DECLARE_SINGLE_ENDED_CHANNELS(s, 's'); static AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(u, 'u'); static AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(s, 's'); #define AD7266_CHAN_DIFF(_chan, _sign) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = (_chan) * 2, \ .channel2 = (_chan) * 2 + 1, \ .address = (_chan), \ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT \ | IIO_CHAN_INFO_SCALE_SHARED_BIT \ | IIO_CHAN_INFO_OFFSET_SHARED_BIT, \ .scan_index = (_chan), \ .scan_type = { \ .sign = _sign, \ .realbits = 12, \ .storagebits = 16, \ .shift = 2, \ .endianness = IIO_BE, \ }, \ .differential = 1, \ } #define AD7266_DECLARE_DIFF_CHANNELS(_name, _sign) \ const struct iio_chan_spec ad7266_channels_diff_##_name[] = { \ AD7266_CHAN_DIFF(0, (_sign)), \ AD7266_CHAN_DIFF(1, (_sign)), \ AD7266_CHAN_DIFF(2, (_sign)), \ AD7266_CHAN_DIFF(3, (_sign)), \ AD7266_CHAN_DIFF(4, (_sign)), \ AD7266_CHAN_DIFF(5, (_sign)), \ IIO_CHAN_SOFT_TIMESTAMP(6), \ } static AD7266_DECLARE_DIFF_CHANNELS(s, 's'); static AD7266_DECLARE_DIFF_CHANNELS(u, 'u'); #define AD7266_DECLARE_DIFF_CHANNELS_FIXED(_name, _sign) \ const struct iio_chan_spec ad7266_channels_diff_fixed_##_name[] = { \ AD7266_CHAN_DIFF(0, (_sign)), \ AD7266_CHAN_DIFF(1, (_sign)), \ IIO_CHAN_SOFT_TIMESTAMP(2), \ } static AD7266_DECLARE_DIFF_CHANNELS_FIXED(s, 's'); static AD7266_DECLARE_DIFF_CHANNELS_FIXED(u, 'u'); static const struct iio_info ad7266_info = { .read_raw = &ad7266_read_raw, .update_scan_mode = &ad7266_update_scan_mode, .driver_module = THIS_MODULE, }; static unsigned long ad7266_available_scan_masks[] = { 0x003, 0x00c, 0x030, 0x0c0, 0x300, 0xc00, 0x000, }; static unsigned long ad7266_available_scan_masks_diff[] = { 0x003, 0x00c, 0x030, 0x000, }; static unsigned long ad7266_available_scan_masks_fixed[] = { 0x003, 0x000, }; struct ad7266_chan_info { const struct iio_chan_spec *channels; unsigned int num_channels; unsigned long *scan_masks; }; #define AD7266_CHAN_INFO_INDEX(_differential, _signed, _fixed) \ (((_differential) << 2) | ((_signed) << 1) | ((_fixed) << 0)) static const struct ad7266_chan_info ad7266_chan_infos[] = { [AD7266_CHAN_INFO_INDEX(0, 0, 0)] = { .channels = ad7266_channels_u, .num_channels = ARRAY_SIZE(ad7266_channels_u), .scan_masks = ad7266_available_scan_masks, }, [AD7266_CHAN_INFO_INDEX(0, 0, 1)] = { .channels = ad7266_channels_u_fixed, .num_channels = ARRAY_SIZE(ad7266_channels_u_fixed), .scan_masks = ad7266_available_scan_masks_fixed, }, [AD7266_CHAN_INFO_INDEX(0, 1, 0)] = { .channels = ad7266_channels_s, .num_channels = ARRAY_SIZE(ad7266_channels_s), .scan_masks = ad7266_available_scan_masks, }, [AD7266_CHAN_INFO_INDEX(0, 1, 1)] = { .channels = ad7266_channels_s_fixed, .num_channels = ARRAY_SIZE(ad7266_channels_s_fixed), .scan_masks = ad7266_available_scan_masks_fixed, }, [AD7266_CHAN_INFO_INDEX(1, 0, 0)] = { .channels = ad7266_channels_diff_u, .num_channels = ARRAY_SIZE(ad7266_channels_diff_u), .scan_masks = ad7266_available_scan_masks_diff, }, [AD7266_CHAN_INFO_INDEX(1, 0, 1)] = { .channels = ad7266_channels_diff_fixed_u, .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_u), .scan_masks = ad7266_available_scan_masks_fixed, }, [AD7266_CHAN_INFO_INDEX(1, 1, 0)] = { .channels = ad7266_channels_diff_s, .num_channels = ARRAY_SIZE(ad7266_channels_diff_s), .scan_masks = ad7266_available_scan_masks_diff, }, [AD7266_CHAN_INFO_INDEX(1, 1, 1)] = { .channels = ad7266_channels_diff_fixed_s, .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_s), .scan_masks = ad7266_available_scan_masks_fixed, }, }; static void __devinit ad7266_init_channels(struct iio_dev *indio_dev) { struct ad7266_state *st = iio_priv(indio_dev); bool is_differential, is_signed; const struct ad7266_chan_info *chan_info; int i; is_differential = st->mode != AD7266_MODE_SINGLE_ENDED; is_signed = (st->range == AD7266_RANGE_2VREF) | (st->mode == AD7266_MODE_DIFF); i = AD7266_CHAN_INFO_INDEX(is_differential, is_signed, st->fixed_addr); chan_info = &ad7266_chan_infos[i]; indio_dev->channels = chan_info->channels; indio_dev->num_channels = chan_info->num_channels; indio_dev->available_scan_masks = chan_info->scan_masks; indio_dev->masklength = chan_info->num_channels - 1; } static const char * const ad7266_gpio_labels[] = { "AD0", "AD1", "AD2", }; static int __devinit ad7266_probe(struct spi_device *spi) { struct ad7266_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; struct ad7266_state *st; unsigned int i; int ret; indio_dev = iio_device_alloc(sizeof(*st)); if (indio_dev == NULL) return -ENOMEM; st = iio_priv(indio_dev); st->reg = regulator_get(&spi->dev, "vref"); if (!IS_ERR_OR_NULL(st->reg)) { ret = regulator_enable(st->reg); if (ret) goto error_put_reg; st->vref_uv = regulator_get_voltage(st->reg); } else { /* Use internal reference */ st->vref_uv = 2500000; } if (pdata) { st->fixed_addr = pdata->fixed_addr; st->mode = pdata->mode; st->range = pdata->range; if (!st->fixed_addr) { for (i = 0; i < ARRAY_SIZE(st->gpios); ++i) { st->gpios[i].gpio = pdata->addr_gpios[i]; st->gpios[i].flags = GPIOF_OUT_INIT_LOW; st->gpios[i].label = ad7266_gpio_labels[i]; } ret = gpio_request_array(st->gpios, ARRAY_SIZE(st->gpios)); if (ret) goto error_disable_reg; } } else { st->fixed_addr = true; st->range = AD7266_RANGE_VREF; st->mode = AD7266_MODE_DIFF; } spi_set_drvdata(spi, indio_dev); st->spi = spi; indio_dev->dev.parent = &spi->dev; indio_dev->name = spi_get_device_id(spi)->name; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &ad7266_info; ad7266_init_channels(indio_dev); /* wakeup */ st->single_xfer[0].rx_buf = &st->data; st->single_xfer[0].len = 2; st->single_xfer[0].cs_change = 1; /* conversion */ st->single_xfer[1].rx_buf = &st->data; st->single_xfer[1].len = 4; st->single_xfer[1].cs_change = 1; /* powerdown */ st->single_xfer[2].tx_buf = &st->data; st->single_xfer[2].len = 1; spi_message_init(&st->single_msg); spi_message_add_tail(&st->single_xfer[0], &st->single_msg); spi_message_add_tail(&st->single_xfer[1], &st->single_msg); spi_message_add_tail(&st->single_xfer[2], &st->single_msg); ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, &ad7266_trigger_handler, &iio_triggered_buffer_setup_ops); if (ret) goto error_free_gpios; ret = iio_device_register(indio_dev); if (ret) goto error_buffer_cleanup; return 0; error_buffer_cleanup: iio_triggered_buffer_cleanup(indio_dev); error_free_gpios: if (!st->fixed_addr) gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); error_disable_reg: if (!IS_ERR_OR_NULL(st->reg)) regulator_disable(st->reg); error_put_reg: if (!IS_ERR_OR_NULL(st->reg)) regulator_put(st->reg); iio_device_free(indio_dev); return ret; } static int __devexit ad7266_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad7266_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); iio_triggered_buffer_cleanup(indio_dev); if (!st->fixed_addr) gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); if (!IS_ERR_OR_NULL(st->reg)) { regulator_disable(st->reg); regulator_put(st->reg); } iio_device_free(indio_dev); return 0; } static const struct spi_device_id ad7266_id[] = { {"ad7265", 0}, {"ad7266", 0}, { } }; MODULE_DEVICE_TABLE(spi, ad7266_id); static struct spi_driver ad7266_driver = { .driver = { .name = "ad7266", .owner = THIS_MODULE, }, .probe = ad7266_probe, .remove = __devexit_p(ad7266_remove), .id_table = ad7266_id, }; module_spi_driver(ad7266_driver); MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); MODULE_DESCRIPTION("Analog Devices AD7266/65 ADC"); MODULE_LICENSE("GPL v2");
drivers/iio/dac/Kconfig +4 −4 Original line number Diff line number Diff line Loading @@ -4,12 +4,12 @@ menu "Digital to analog converters" config AD5064 tristate "Analog Devices AD5064/64-1/65/44/45/24/25, AD5628/48/66/68 DAC driver" depends on SPI tristate "Analog Devices AD5064 and similar multi-channel DAC driver" depends on (SPI_MASTER || I2C) help Say yes here to build support for Analog Devices AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5648, AD5666, AD5668 Digital to Analog Converter. AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5629R, AD5648, AD5666, AD5668, AD5669R Digital to Analog Converter. To compile this driver as a module, choose M here: the module will be called ad5064. Loading
drivers/iio/dac/ad5064.c +169 −31 Original line number Diff line number Diff line /* * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5648, * AD5666, AD5668 Digital to analog converters driver * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5629R, * AD5648, AD5666, AD5668, AD5669R Digital to analog converters driver * * Copyright 2011 Analog Devices Inc. * Loading @@ -12,9 +12,11 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/spi/spi.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/regulator/consumer.h> #include <asm/unaligned.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> Loading Loading @@ -62,9 +64,14 @@ struct ad5064_chip_info { unsigned int num_channels; }; struct ad5064_state; typedef int (*ad5064_write_func)(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val); /** * struct ad5064_state - driver instance specific data * @spi: spi_device * @dev: the device for this driver instance * @chip_info: chip model specific constants, available modes etc * @vref_reg: vref supply regulators * @pwr_down: whether channel is powered down Loading @@ -72,11 +79,12 @@ struct ad5064_chip_info { * @dac_cache: current DAC raw value (chip does not support readback) * @use_internal_vref: set to true if the internal reference voltage should be * used. * @data: spi transfer buffers * @write: register write callback * @data: i2c/spi transfer buffers */ struct ad5064_state { struct spi_device *spi; struct device *dev; const struct ad5064_chip_info *chip_info; struct regulator_bulk_data vref_reg[AD5064_MAX_VREFS]; bool pwr_down[AD5064_MAX_DAC_CHANNELS]; Loading @@ -84,11 +92,16 @@ struct ad5064_state { unsigned int dac_cache[AD5064_MAX_DAC_CHANNELS]; bool use_internal_vref; ad5064_write_func write; /* * DMA (thus cache coherency maintenance) requires the * transfer buffers to live in their own cache lines. */ __be32 data ____cacheline_aligned; union { u8 i2c[3]; __be32 spi; } data ____cacheline_aligned; }; enum ad5064_type { Loading @@ -109,14 +122,31 @@ enum ad5064_type { ID_AD5668_2, }; static int ad5064_i2c_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val) { struct i2c_client *i2c = to_i2c_client(st->dev); st->data.i2c[0] = (cmd << 4) | addr; put_unaligned_be16(val, &st->data.i2c[1]); return i2c_master_send(i2c, st->data.i2c, 3); } static int ad5064_spi_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val) { struct spi_device *spi = to_spi_device(st->dev); st->data.spi = cpu_to_be32(AD5064_CMD(cmd) | AD5064_ADDR(addr) | val); return spi_write(spi, &st->data.spi, sizeof(st->data.spi)); } static int ad5064_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val, unsigned int shift) { val <<= shift; st->data = cpu_to_be32(AD5064_CMD(cmd) | AD5064_ADDR(addr) | val); return spi_write(st->spi, &st->data, sizeof(st->data)); return st->write(st, cmd, addr, val); } static int ad5064_sync_powerdown_mode(struct ad5064_state *st, Loading @@ -130,7 +160,7 @@ static int ad5064_sync_powerdown_mode(struct ad5064_state *st, if (st->pwr_down[channel]) val |= st->pwr_down_mode[channel] << 8; ret = ad5064_spi_write(st, AD5064_CMD_POWERDOWN_DAC, 0, val, 0); ret = ad5064_write(st, AD5064_CMD_POWERDOWN_DAC, 0, val, 0); return ret; } Loading Loading @@ -251,7 +281,7 @@ static int ad5064_write_raw(struct iio_dev *indio_dev, return -EINVAL; mutex_lock(&indio_dev->mlock); ret = ad5064_spi_write(st, AD5064_CMD_WRITE_INPUT_N_UPDATE_N, ret = ad5064_write(st, AD5064_CMD_WRITE_INPUT_N_UPDATE_N, chan->address, val, chan->scan_type.shift); if (ret == 0) st->dac_cache[chan->channel] = val; Loading Loading @@ -413,9 +443,9 @@ static const char * const ad5064_vref_name(struct ad5064_state *st, return st->chip_info->shared_vref ? "vref" : ad5064_vref_names[vref]; } static int __devinit ad5064_probe(struct spi_device *spi) static int __devinit ad5064_probe(struct device *dev, enum ad5064_type type, const char *name, ad5064_write_func write) { enum ad5064_type type = spi_get_device_id(spi)->driver_data; struct iio_dev *indio_dev; struct ad5064_state *st; unsigned int i; Loading @@ -426,24 +456,25 @@ static int __devinit ad5064_probe(struct spi_device *spi) return -ENOMEM; st = iio_priv(indio_dev); spi_set_drvdata(spi, indio_dev); dev_set_drvdata(dev, indio_dev); st->chip_info = &ad5064_chip_info_tbl[type]; st->spi = spi; st->dev = dev; st->write = write; for (i = 0; i < ad5064_num_vref(st); ++i) st->vref_reg[i].supply = ad5064_vref_name(st, i); ret = regulator_bulk_get(&st->spi->dev, ad5064_num_vref(st), ret = regulator_bulk_get(dev, ad5064_num_vref(st), st->vref_reg); if (ret) { if (!st->chip_info->internal_vref) goto error_free; st->use_internal_vref = true; ret = ad5064_spi_write(st, AD5064_CMD_CONFIG, 0, ret = ad5064_write(st, AD5064_CMD_CONFIG, 0, AD5064_CONFIG_INT_VREF_ENABLE, 0); if (ret) { dev_err(&spi->dev, "Failed to enable internal vref: %d\n", dev_err(dev, "Failed to enable internal vref: %d\n", ret); goto error_free; } Loading @@ -458,8 +489,8 @@ static int __devinit ad5064_probe(struct spi_device *spi) st->dac_cache[i] = 0x8000; } 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 = &ad5064_info; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = st->chip_info->channels; Loading @@ -483,10 +514,9 @@ error_free: return ret; } static int __devexit ad5064_remove(struct spi_device *spi) static int __devexit ad5064_remove(struct device *dev) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct iio_dev *indio_dev = dev_get_drvdata(dev); struct ad5064_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); Loading @@ -501,7 +531,22 @@ static int __devexit ad5064_remove(struct spi_device *spi) return 0; } static const struct spi_device_id ad5064_id[] = { #if IS_ENABLED(CONFIG_SPI_MASTER) static int __devinit ad5064_spi_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); return ad5064_probe(&spi->dev, id->driver_data, id->name, ad5064_spi_write); } static int __devexit ad5064_spi_remove(struct spi_device *spi) { return ad5064_remove(&spi->dev); } static const struct spi_device_id ad5064_spi_ids[] = { {"ad5024", ID_AD5024}, {"ad5025", ID_AD5025}, {"ad5044", ID_AD5044}, Loading @@ -520,19 +565,112 @@ static const struct spi_device_id ad5064_id[] = { {"ad5668-3", ID_AD5668_2}, /* similar enough to ad5668-2 */ {} }; MODULE_DEVICE_TABLE(spi, ad5064_id); MODULE_DEVICE_TABLE(spi, ad5064_spi_ids); static struct spi_driver ad5064_driver = { static struct spi_driver ad5064_spi_driver = { .driver = { .name = "ad5064", .owner = THIS_MODULE, }, .probe = ad5064_probe, .remove = __devexit_p(ad5064_remove), .id_table = ad5064_id, .probe = ad5064_spi_probe, .remove = __devexit_p(ad5064_spi_remove), .id_table = ad5064_spi_ids, }; module_spi_driver(ad5064_driver); static int __init ad5064_spi_register_driver(void) { return spi_register_driver(&ad5064_spi_driver); } static void __exit ad5064_spi_unregister_driver(void) { spi_unregister_driver(&ad5064_spi_driver); } #else static inline int ad5064_spi_register_driver(void) { return 0; } static inline void ad5064_spi_unregister_driver(void) { } #endif #if IS_ENABLED(CONFIG_I2C) static int __devinit ad5064_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { return ad5064_probe(&i2c->dev, id->driver_data, id->name, ad5064_i2c_write); } static int __devexit ad5064_i2c_remove(struct i2c_client *i2c) { return ad5064_remove(&i2c->dev); } static const struct i2c_device_id ad5064_i2c_ids[] = { {"ad5629-1", ID_AD5628_1}, {"ad5629-2", ID_AD5628_2}, {"ad5629-3", ID_AD5628_2}, /* similar enough to ad5629-2 */ {"ad5669-1", ID_AD5668_1}, {"ad5669-2", ID_AD5668_2}, {"ad5669-3", ID_AD5668_2}, /* similar enough to ad5669-2 */ {} }; MODULE_DEVICE_TABLE(i2c, ad5064_i2c_ids); static struct i2c_driver ad5064_i2c_driver = { .driver = { .name = "ad5064", .owner = THIS_MODULE, }, .probe = ad5064_i2c_probe, .remove = __devexit_p(ad5064_i2c_remove), .id_table = ad5064_i2c_ids, }; static int __init ad5064_i2c_register_driver(void) { return i2c_add_driver(&ad5064_i2c_driver); } static void __exit ad5064_i2c_unregister_driver(void) { i2c_del_driver(&ad5064_i2c_driver); } #else static inline int ad5064_i2c_register_driver(void) { return 0; } static inline void ad5064_i2c_unregister_driver(void) { } #endif static int __init ad5064_init(void) { int ret; ret = ad5064_spi_register_driver(); if (ret) return ret; ret = ad5064_i2c_register_driver(); if (ret) { ad5064_spi_unregister_driver(); return ret; } return 0; } module_init(ad5064_init); static void __exit ad5064_exit(void) { ad5064_i2c_unregister_driver(); ad5064_spi_unregister_driver(); } module_exit(ad5064_exit); MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); MODULE_DESCRIPTION("Analog Devices AD5024/25/44/45/64/64-1/65, AD5628/48/66/68 DAC"); MODULE_DESCRIPTION("Analog Devices AD5024 and similar multi-channel DACs"); MODULE_LICENSE("GPL v2");
