| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Michael Hennerich | 786 | 53.04% | 2 | 6.25% |
| Lars-Peter Clausen | 487 | 32.86% | 10 | 31.25% |
| Jonathan Cameron | 158 | 10.66% | 12 | 37.50% |
| Sachin Kamat | 21 | 1.42% | 2 | 6.25% |
| Axel Lin | 14 | 0.94% | 1 | 3.12% |
| Peter Meerwald-Stadler | 7 | 0.47% | 1 | 3.12% |
| Grégor Boirie | 3 | 0.20% | 1 | 3.12% |
| Paul Gortmaker | 3 | 0.20% | 1 | 3.12% |
| Thomas Gleixner | 2 | 0.13% | 1 | 3.12% |
| simran singhal | 1 | 0.07% | 1 | 3.12% |
| Total | 1482 | 32 |
// SPDX-License-Identifier: GPL-2.0-only /* * AD5504, AD5501 High Voltage Digital to Analog Converter * * Copyright 2011 Analog Devices Inc. */ #include <linux/interrupt.h> #include <linux/fs.h> #include <linux/device.h> #include <linux/kernel.h> #include <linux/spi/spi.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/regulator/consumer.h> #include <linux/module.h> #include <linux/bitops.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/events.h> #include <linux/iio/dac/ad5504.h> #define AD5504_RES_MASK GENMASK(11, 0) #define AD5504_CMD_READ BIT(15) #define AD5504_CMD_WRITE 0 #define AD5504_ADDR(addr) ((addr) << 12) /* Registers */ #define AD5504_ADDR_NOOP 0 #define AD5504_ADDR_DAC(x) ((x) + 1) #define AD5504_ADDR_ALL_DAC 5 #define AD5504_ADDR_CTRL 7 /* Control Register */ #define AD5504_DAC_PWR(ch) ((ch) << 2) #define AD5504_DAC_PWRDWN_MODE(mode) ((mode) << 6) #define AD5504_DAC_PWRDN_20K 0 #define AD5504_DAC_PWRDN_3STATE 1 /** * struct ad5446_state - driver instance specific data * @spi: spi_device * @reg: supply regulator * @vref_mv: actual reference voltage used * @pwr_down_mask power down mask * @pwr_down_mode current power down mode * @data: transfer buffer */ struct ad5504_state { struct spi_device *spi; struct regulator *reg; unsigned short vref_mv; unsigned pwr_down_mask; unsigned pwr_down_mode; __be16 data[2] ____cacheline_aligned; }; /** * ad5504_supported_device_ids: */ enum ad5504_supported_device_ids { ID_AD5504, ID_AD5501, }; static int ad5504_spi_write(struct ad5504_state *st, u8 addr, u16 val) { st->data[0] = cpu_to_be16(AD5504_CMD_WRITE | AD5504_ADDR(addr) | (val & AD5504_RES_MASK)); return spi_write(st->spi, &st->data[0], 2); } static int ad5504_spi_read(struct ad5504_state *st, u8 addr) { int ret; struct spi_transfer t = { .tx_buf = &st->data[0], .rx_buf = &st->data[1], .len = 2, }; st->data[0] = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr)); ret = spi_sync_transfer(st->spi, &t, 1); if (ret < 0) return ret; return be16_to_cpu(st->data[1]) & AD5504_RES_MASK; } static int ad5504_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { struct ad5504_state *st = iio_priv(indio_dev); int ret; switch (m) { case IIO_CHAN_INFO_RAW: ret = ad5504_spi_read(st, chan->address); if (ret < 0) return ret; *val = ret; return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: *val = st->vref_mv; *val2 = chan->scan_type.realbits; return IIO_VAL_FRACTIONAL_LOG2; } return -EINVAL; } static int ad5504_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { struct ad5504_state *st = iio_priv(indio_dev); switch (mask) { case IIO_CHAN_INFO_RAW: if (val >= (1 << chan->scan_type.realbits) || val < 0) return -EINVAL; return ad5504_spi_write(st, chan->address, val); default: return -EINVAL; } } static const char * const ad5504_powerdown_modes[] = { "20kohm_to_gnd", "three_state", }; static int ad5504_get_powerdown_mode(struct iio_dev *indio_dev, const struct iio_chan_spec *chan) { struct ad5504_state *st = iio_priv(indio_dev); return st->pwr_down_mode; } static int ad5504_set_powerdown_mode(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, unsigned int mode) { struct ad5504_state *st = iio_priv(indio_dev); st->pwr_down_mode = mode; return 0; } static const struct iio_enum ad5504_powerdown_mode_enum = { .items = ad5504_powerdown_modes, .num_items = ARRAY_SIZE(ad5504_powerdown_modes), .get = ad5504_get_powerdown_mode, .set = ad5504_set_powerdown_mode, }; static ssize_t ad5504_read_dac_powerdown(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, char *buf) { struct ad5504_state *st = iio_priv(indio_dev); return sprintf(buf, "%d\n", !(st->pwr_down_mask & (1 << chan->channel))); } static ssize_t ad5504_write_dac_powerdown(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, const char *buf, size_t len) { bool pwr_down; int ret; struct ad5504_state *st = iio_priv(indio_dev); ret = strtobool(buf, &pwr_down); if (ret) return ret; if (pwr_down) st->pwr_down_mask |= (1 << chan->channel); else st->pwr_down_mask &= ~(1 << chan->channel); ret = ad5504_spi_write(st, AD5504_ADDR_CTRL, AD5504_DAC_PWRDWN_MODE(st->pwr_down_mode) | AD5504_DAC_PWR(st->pwr_down_mask)); /* writes to the CTRL register must be followed by a NOOP */ ad5504_spi_write(st, AD5504_ADDR_NOOP, 0); return ret ? ret : len; } static IIO_CONST_ATTR(temp0_thresh_rising_value, "110000"); static IIO_CONST_ATTR(temp0_thresh_rising_en, "1"); static struct attribute *ad5504_ev_attributes[] = { &iio_const_attr_temp0_thresh_rising_value.dev_attr.attr, &iio_const_attr_temp0_thresh_rising_en.dev_attr.attr, NULL, }; static const struct attribute_group ad5504_ev_attribute_group = { .attrs = ad5504_ev_attributes, }; static irqreturn_t ad5504_event_handler(int irq, void *private) { iio_push_event(private, IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0, IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING), iio_get_time_ns(private)); return IRQ_HANDLED; } static const struct iio_info ad5504_info = { .write_raw = ad5504_write_raw, .read_raw = ad5504_read_raw, .event_attrs = &ad5504_ev_attribute_group, }; static const struct iio_chan_spec_ext_info ad5504_ext_info[] = { { .name = "powerdown", .read = ad5504_read_dac_powerdown, .write = ad5504_write_dac_powerdown, .shared = IIO_SEPARATE, }, IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, &ad5504_powerdown_mode_enum), IIO_ENUM_AVAILABLE("powerdown_mode", &ad5504_powerdown_mode_enum), { }, }; #define AD5504_CHANNEL(_chan) { \ .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 = AD5504_ADDR_DAC(_chan), \ .scan_type = { \ .sign = 'u', \ .realbits = 12, \ .storagebits = 16, \ }, \ .ext_info = ad5504_ext_info, \ } static const struct iio_chan_spec ad5504_channels[] = { AD5504_CHANNEL(0), AD5504_CHANNEL(1), AD5504_CHANNEL(2), AD5504_CHANNEL(3), }; static int ad5504_probe(struct spi_device *spi) { struct ad5504_platform_data *pdata = spi->dev.platform_data; struct iio_dev *indio_dev; struct ad5504_state *st; struct regulator *reg; int ret, voltage_uv = 0; indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); if (!indio_dev) return -ENOMEM; reg = devm_regulator_get(&spi->dev, "vcc"); if (!IS_ERR(reg)) { ret = regulator_enable(reg); if (ret) return ret; ret = regulator_get_voltage(reg); if (ret < 0) goto error_disable_reg; voltage_uv = ret; } spi_set_drvdata(spi, indio_dev); st = iio_priv(indio_dev); if (voltage_uv) st->vref_mv = voltage_uv / 1000; else if (pdata) st->vref_mv = pdata->vref_mv; else dev_warn(&spi->dev, "reference voltage unspecified\n"); st->reg = reg; st->spi = spi; indio_dev->dev.parent = &spi->dev; indio_dev->name = spi_get_device_id(st->spi)->name; indio_dev->info = &ad5504_info; if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) indio_dev->num_channels = 1; else indio_dev->num_channels = 4; indio_dev->channels = ad5504_channels; indio_dev->modes = INDIO_DIRECT_MODE; if (spi->irq) { ret = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, &ad5504_event_handler, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, spi_get_device_id(st->spi)->name, indio_dev); if (ret) goto error_disable_reg; } ret = iio_device_register(indio_dev); if (ret) goto error_disable_reg; return 0; error_disable_reg: if (!IS_ERR(reg)) regulator_disable(reg); return ret; } static int ad5504_remove(struct spi_device *spi) { struct iio_dev *indio_dev = spi_get_drvdata(spi); struct ad5504_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); if (!IS_ERR(st->reg)) regulator_disable(st->reg); return 0; } static const struct spi_device_id ad5504_id[] = { {"ad5504", ID_AD5504}, {"ad5501", ID_AD5501}, {} }; MODULE_DEVICE_TABLE(spi, ad5504_id); static struct spi_driver ad5504_driver = { .driver = { .name = "ad5504", }, .probe = ad5504_probe, .remove = ad5504_remove, .id_table = ad5504_id, }; module_spi_driver(ad5504_driver); MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); MODULE_DESCRIPTION("Analog Devices AD5501/AD5501 DAC"); MODULE_LICENSE("GPL v2");
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