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Diffstat (limited to 'drivers/staging/iio/dac/ad5504.c')
-rw-r--r--drivers/staging/iio/dac/ad5504.c397
1 files changed, 0 insertions, 397 deletions
diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c
deleted file mode 100644
index 019cf15cd24a..000000000000
--- a/drivers/staging/iio/dac/ad5504.c
+++ /dev/null
@@ -1,397 +0,0 @@
-/*
- * AD5504, AD5501 High Voltage Digital to Analog Converter
- *
- * Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
- */
-
-#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/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include <linux/iio/events.h>
-#include "dac.h"
-#include "ad5504.h"
-
-#define AD5504_CHANNEL(_chan) { \
- .type = IIO_VOLTAGE, \
- .indexed = 1, \
- .output = 1, \
- .channel = (_chan), \
- .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
- IIO_CHAN_INFO_SCALE_SHARED_BIT, \
- .address = AD5504_ADDR_DAC(_chan), \
- .scan_type = IIO_ST('u', 12, 16, 0), \
-}
-
-static const struct iio_chan_spec ad5504_channels[] = {
- AD5504_CHANNEL(0),
- AD5504_CHANNEL(1),
- AD5504_CHANNEL(2),
- AD5504_CHANNEL(3),
-};
-
-static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
-{
- u16 tmp = cpu_to_be16(AD5504_CMD_WRITE |
- AD5504_ADDR(addr) |
- (val & AD5504_RES_MASK));
-
- return spi_write(spi, (u8 *)&tmp, 2);
-}
-
-static int ad5504_spi_read(struct spi_device *spi, u8 addr)
-{
- u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr));
- u16 val;
- int ret;
- struct spi_transfer t = {
- .tx_buf = &tmp,
- .rx_buf = &val,
- .len = 2,
- };
- struct spi_message m;
-
- spi_message_init(&m);
- spi_message_add_tail(&t, &m);
- ret = spi_sync(spi, &m);
-
- if (ret < 0)
- return ret;
-
- return be16_to_cpu(val) & 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);
- unsigned long scale_uv;
- int ret;
-
- switch (m) {
- case IIO_CHAN_INFO_RAW:
- ret = ad5504_spi_read(st->spi, chan->address);
- if (ret < 0)
- return ret;
-
- *val = ret;
-
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_SCALE:
- scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
- *val = scale_uv / 1000;
- *val2 = (scale_uv % 1000) * 1000;
- return IIO_VAL_INT_PLUS_MICRO;
-
- }
- 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);
- int ret;
-
- switch (mask) {
- case IIO_CHAN_INFO_RAW:
- if (val >= (1 << chan->scan_type.realbits) || val < 0)
- return -EINVAL;
-
- return ad5504_spi_write(st->spi, chan->address, val);
- default:
- ret = -EINVAL;
- }
-
- return -EINVAL;
-}
-
-static ssize_t ad5504_read_powerdown_mode(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ad5504_state *st = iio_priv(indio_dev);
-
- const char mode[][14] = {"20kohm_to_gnd", "three_state"};
-
- return sprintf(buf, "%s\n", mode[st->pwr_down_mode]);
-}
-
-static ssize_t ad5504_write_powerdown_mode(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ad5504_state *st = iio_priv(indio_dev);
- int ret;
-
- if (sysfs_streq(buf, "20kohm_to_gnd"))
- st->pwr_down_mode = AD5504_DAC_PWRDN_20K;
- else if (sysfs_streq(buf, "three_state"))
- st->pwr_down_mode = AD5504_DAC_PWRDN_3STATE;
- else
- ret = -EINVAL;
-
- return ret ? ret : len;
-}
-
-static ssize_t ad5504_read_dac_powerdown(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ad5504_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-
- return sprintf(buf, "%d\n",
- !(st->pwr_down_mask & (1 << this_attr->address)));
-}
-
-static ssize_t ad5504_write_dac_powerdown(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- long readin;
- int ret;
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ad5504_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-
- ret = strict_strtol(buf, 10, &readin);
- if (ret)
- return ret;
-
- if (readin == 0)
- st->pwr_down_mask |= (1 << this_attr->address);
- else if (readin == 1)
- st->pwr_down_mask &= ~(1 << this_attr->address);
- else
- ret = -EINVAL;
-
- ret = ad5504_spi_write(st->spi, 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->spi, AD5504_ADDR_NOOP, 0);
-
- return ret ? ret : len;
-}
-
-static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO |
- S_IWUSR, ad5504_read_powerdown_mode,
- ad5504_write_powerdown_mode, 0);
-
-static IIO_CONST_ATTR(out_voltage_powerdown_mode_available,
- "20kohm_to_gnd three_state");
-
-#define IIO_DEV_ATTR_DAC_POWERDOWN(_num, _show, _store, _addr) \
- IIO_DEVICE_ATTR(out_voltage##_num##_powerdown, \
- S_IRUGO | S_IWUSR, _show, _store, _addr)
-static IIO_DEV_ATTR_DAC_POWERDOWN(0, ad5504_read_dac_powerdown,
- ad5504_write_dac_powerdown, 0);
-static IIO_DEV_ATTR_DAC_POWERDOWN(1, ad5504_read_dac_powerdown,
- ad5504_write_dac_powerdown, 1);
-static IIO_DEV_ATTR_DAC_POWERDOWN(2, ad5504_read_dac_powerdown,
- ad5504_write_dac_powerdown, 2);
-static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5504_read_dac_powerdown,
- ad5504_write_dac_powerdown, 3);
-
-static struct attribute *ad5504_attributes[] = {
- &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
- &iio_dev_attr_out_voltage1_powerdown.dev_attr.attr,
- &iio_dev_attr_out_voltage2_powerdown.dev_attr.attr,
- &iio_dev_attr_out_voltage3_powerdown.dev_attr.attr,
- &iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
- &iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group ad5504_attribute_group = {
- .attrs = ad5504_attributes,
-};
-
-static struct attribute *ad5501_attributes[] = {
- &iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
- &iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
- &iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group ad5501_attribute_group = {
- .attrs = ad5501_attributes,
-};
-
-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 struct attribute_group ad5504_ev_attribute_group = {
- .attrs = ad5504_ev_attributes,
- .name = "events",
-};
-
-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());
-
- return IRQ_HANDLED;
-}
-
-static const struct iio_info ad5504_info = {
- .write_raw = ad5504_write_raw,
- .read_raw = ad5504_read_raw,
- .attrs = &ad5504_attribute_group,
- .event_attrs = &ad5504_ev_attribute_group,
- .driver_module = THIS_MODULE,
-};
-
-static const struct iio_info ad5501_info = {
- .write_raw = ad5504_write_raw,
- .read_raw = ad5504_read_raw,
- .attrs = &ad5501_attribute_group,
- .event_attrs = &ad5504_ev_attribute_group,
- .driver_module = THIS_MODULE,
-};
-
-static int __devinit 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 = iio_device_alloc(sizeof(*st));
- if (indio_dev == NULL) {
- ret = -ENOMEM;
- goto error_ret;
- }
- reg = regulator_get(&spi->dev, "vcc");
- if (!IS_ERR(reg)) {
- ret = regulator_enable(reg);
- if (ret)
- goto error_put_reg;
-
- voltage_uv = regulator_get_voltage(reg);
- }
-
- 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;
- if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) {
- indio_dev->info = &ad5501_info;
- indio_dev->num_channels = 1;
- } else {
- indio_dev->info = &ad5504_info;
- indio_dev->num_channels = 4;
- }
- indio_dev->channels = ad5504_channels;
- indio_dev->modes = INDIO_DIRECT_MODE;
-
- if (spi->irq) {
- ret = request_threaded_irq(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_free_irq;
-
- return 0;
-
-error_free_irq:
- free_irq(spi->irq, indio_dev);
-error_disable_reg:
- if (!IS_ERR(reg))
- regulator_disable(reg);
-error_put_reg:
- if (!IS_ERR(reg))
- regulator_put(reg);
-
- iio_device_free(indio_dev);
-error_ret:
- return ret;
-}
-
-static int __devexit 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 (spi->irq)
- free_irq(spi->irq, indio_dev);
-
- if (!IS_ERR(st->reg)) {
- regulator_disable(st->reg);
- regulator_put(st->reg);
- }
- iio_device_free(indio_dev);
-
- 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",
- .owner = THIS_MODULE,
- },
- .probe = ad5504_probe,
- .remove = __devexit_p(ad5504_remove),
- .id_table = ad5504_id,
-};
-module_spi_driver(ad5504_driver);
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("Analog Devices AD5501/AD5501 DAC");
-MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-13 14:04:17 +0000