#include "../iio.h"
#include "../sysfs.h"
+#include "../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_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 |
return spi_write(spi, (u8 *)&tmp, 2);
}
-static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val)
+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,
+ .rx_buf = &val,
.len = 2,
};
struct spi_message m;
spi_message_add_tail(&t, &m);
ret = spi_sync(spi, &m);
- *val = be16_to_cpu(*val) & AD5504_RES_MASK;
+ if (ret < 0)
+ return ret;
- return ret;
+ return be16_to_cpu(val) & AD5504_RES_MASK;
}
-static ssize_t ad5504_write_dac(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
+static int ad5504_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5504_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- long readin;
+ unsigned long scale_uv;
int ret;
- ret = strict_strtol(buf, 10, &readin);
- if (ret)
- return ret;
+ switch (m) {
+ case 0:
+ ret = ad5504_spi_read(st->spi, chan->address);
+ if (ret < 0)
+ return ret;
- ret = ad5504_spi_write(st->spi, this_attr->address, readin);
- return ret ? ret : len;
+ *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 ssize_t ad5504_read_dac(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static int ad5504_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5504_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
int ret;
- u16 val;
- ret = ad5504_spi_read(st->spi, this_attr->address, &val);
- if (ret)
- return ret;
+ switch (mask) {
+ case 0:
+ if (val >= (1 << chan->scan_type.realbits) || val < 0)
+ return -EINVAL;
- return sprintf(buf, "%d\n", val);
+ return ad5504_spi_write(st->spi, chan->address, val);
+ default:
+ ret = -EINVAL;
+ }
+
+ return -EINVAL;
}
static ssize_t ad5504_read_powerdown_mode(struct device *dev,
return ret ? ret : len;
}
-static ssize_t ad5504_show_scale(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct ad5504_state *st = iio_priv(indio_dev);
- /* Corresponds to Vref / 2^(bits) */
- unsigned int scale_uv = (st->vref_mv * 1000) >> AD5505_BITS;
-
- return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
-}
-static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5504_show_scale, NULL, 0);
-
-#define IIO_DEV_ATTR_OUT_RW_RAW(_num, _show, _store, _addr) \
- IIO_DEVICE_ATTR(out_voltage##_num##_raw, \
- S_IRUGO | S_IWUSR, _show, _store, _addr)
-
-static IIO_DEV_ATTR_OUT_RW_RAW(0, ad5504_read_dac,
- ad5504_write_dac, AD5504_ADDR_DAC0);
-static IIO_DEV_ATTR_OUT_RW_RAW(1, ad5504_read_dac,
- ad5504_write_dac, AD5504_ADDR_DAC1);
-static IIO_DEV_ATTR_OUT_RW_RAW(2, ad5504_read_dac,
- ad5504_write_dac, AD5504_ADDR_DAC2);
-static IIO_DEV_ATTR_OUT_RW_RAW(3, ad5504_read_dac,
- ad5504_write_dac, AD5504_ADDR_DAC3);
-
static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO |
S_IWUSR, ad5504_read_powerdown_mode,
ad5504_write_powerdown_mode, 0);
ad5504_write_dac_powerdown, 3);
static struct attribute *ad5504_attributes[] = {
- &iio_dev_attr_out_voltage0_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage1_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage2_raw.dev_attr.attr,
- &iio_dev_attr_out_voltage3_raw.dev_attr.attr,
&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,
- &iio_dev_attr_out_voltage_scale.dev_attr.attr,
NULL,
};
};
static struct attribute *ad5501_attributes[] = {
- &iio_dev_attr_out_voltage0_raw.dev_attr.attr,
&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,
- &iio_dev_attr_out_voltage_scale.dev_attr.attr,
NULL,
};
}
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,
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)
+ if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) {
indio_dev->info = &ad5501_info;
- else
+ 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) {
{"ad5501", ID_AD5501},
{}
};
+MODULE_DEVICE_TABLE(spi, ad5504_id);
static struct spi_driver ad5504_driver = {
.driver = {
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