forked from Minki/linux
staging:iio:dac:ad5504: Convert to channel spec
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Lars-Peter Clausen
Greg Kroah-Hartman
parent
33ad6b21f6
commit
a7b152881c
@ -22,6 +22,23 @@
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#include "dac.h"
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#include "ad5504.h"
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#define AD5504_CHANNEL(_chan) { \
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.type = IIO_VOLTAGE, \
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.indexed = 1, \
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.output = 1, \
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.channel = (_chan), \
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.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \
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.address = AD5504_ADDR_DAC(_chan), \
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.scan_type = IIO_ST('u', 12, 16, 0), \
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}
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static const struct iio_chan_spec ad5504_channels[] = {
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AD5504_CHANNEL(0),
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AD5504_CHANNEL(1),
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AD5504_CHANNEL(2),
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AD5504_CHANNEL(3),
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};
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static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
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{
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u16 tmp = cpu_to_be16(AD5504_CMD_WRITE |
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@ -31,13 +48,14 @@ static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
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return spi_write(spi, (u8 *)&tmp, 2);
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}
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static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val)
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static int ad5504_spi_read(struct spi_device *spi, u8 addr)
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{
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u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr));
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u16 val;
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int ret;
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struct spi_transfer t = {
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.tx_buf = &tmp,
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.rx_buf = val,
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.rx_buf = &val,
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.len = 2,
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};
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struct spi_message m;
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@ -46,44 +64,61 @@ static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val)
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spi_message_add_tail(&t, &m);
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ret = spi_sync(spi, &m);
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*val = be16_to_cpu(*val) & AD5504_RES_MASK;
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return ret;
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}
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static ssize_t ad5504_write_dac(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5504_state *st = iio_priv(indio_dev);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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long readin;
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int ret;
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ret = strict_strtol(buf, 10, &readin);
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if (ret)
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if (ret < 0)
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return ret;
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ret = ad5504_spi_write(st->spi, this_attr->address, readin);
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return ret ? ret : len;
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return be16_to_cpu(val) & AD5504_RES_MASK;
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}
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static ssize_t ad5504_read_dac(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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static int ad5504_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val,
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int *val2,
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long m)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5504_state *st = iio_priv(indio_dev);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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unsigned long scale_uv;
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int ret;
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u16 val;
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ret = ad5504_spi_read(st->spi, this_attr->address, &val);
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if (ret)
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return ret;
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switch (m) {
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case 0:
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ret = ad5504_spi_read(st->spi, chan->address);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%d\n", val);
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*val = ret;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
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*val = scale_uv / 1000;
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*val2 = (scale_uv % 1000) * 1000;
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return IIO_VAL_INT_PLUS_MICRO;
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}
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return -EINVAL;
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}
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static int ad5504_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int val,
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int val2,
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long mask)
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{
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struct ad5504_state *st = iio_priv(indio_dev);
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int ret;
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switch (mask) {
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case 0:
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if (val >= (1 << chan->scan_type.realbits) || val < 0)
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return -EINVAL;
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return ad5504_spi_write(st->spi, chan->address, val);
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default:
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ret = -EINVAL;
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}
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return -EINVAL;
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}
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static ssize_t ad5504_read_powerdown_mode(struct device *dev,
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@ -158,32 +193,6 @@ static ssize_t ad5504_write_dac_powerdown(struct device *dev,
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return ret ? ret : len;
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}
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static ssize_t ad5504_show_scale(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5504_state *st = iio_priv(indio_dev);
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/* Corresponds to Vref / 2^(bits) */
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unsigned int scale_uv = (st->vref_mv * 1000) >> AD5505_BITS;
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return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
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}
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static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5504_show_scale, NULL, 0);
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#define IIO_DEV_ATTR_OUT_RW_RAW(_num, _show, _store, _addr) \
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IIO_DEVICE_ATTR(out_voltage##_num##_raw, \
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S_IRUGO | S_IWUSR, _show, _store, _addr)
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static IIO_DEV_ATTR_OUT_RW_RAW(0, ad5504_read_dac,
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ad5504_write_dac, AD5504_ADDR_DAC0);
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static IIO_DEV_ATTR_OUT_RW_RAW(1, ad5504_read_dac,
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ad5504_write_dac, AD5504_ADDR_DAC1);
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static IIO_DEV_ATTR_OUT_RW_RAW(2, ad5504_read_dac,
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ad5504_write_dac, AD5504_ADDR_DAC2);
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static IIO_DEV_ATTR_OUT_RW_RAW(3, ad5504_read_dac,
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ad5504_write_dac, AD5504_ADDR_DAC3);
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static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO |
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S_IWUSR, ad5504_read_powerdown_mode,
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ad5504_write_powerdown_mode, 0);
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@ -204,17 +213,12 @@ static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5504_read_dac_powerdown,
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ad5504_write_dac_powerdown, 3);
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static struct attribute *ad5504_attributes[] = {
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&iio_dev_attr_out_voltage0_raw.dev_attr.attr,
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&iio_dev_attr_out_voltage1_raw.dev_attr.attr,
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&iio_dev_attr_out_voltage2_raw.dev_attr.attr,
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&iio_dev_attr_out_voltage3_raw.dev_attr.attr,
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&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
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&iio_dev_attr_out_voltage1_powerdown.dev_attr.attr,
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&iio_dev_attr_out_voltage2_powerdown.dev_attr.attr,
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&iio_dev_attr_out_voltage3_powerdown.dev_attr.attr,
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&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
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&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
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&iio_dev_attr_out_voltage_scale.dev_attr.attr,
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NULL,
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};
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@ -223,11 +227,9 @@ static const struct attribute_group ad5504_attribute_group = {
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};
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static struct attribute *ad5501_attributes[] = {
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&iio_dev_attr_out_voltage0_raw.dev_attr.attr,
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&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
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&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
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&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
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&iio_dev_attr_out_voltage_scale.dev_attr.attr,
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NULL,
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};
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@ -262,12 +264,16 @@ static irqreturn_t ad5504_event_handler(int irq, void *private)
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}
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static const struct iio_info ad5504_info = {
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.write_raw = ad5504_write_raw,
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.read_raw = ad5504_read_raw,
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.attrs = &ad5504_attribute_group,
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.event_attrs = &ad5504_ev_attribute_group,
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.driver_module = THIS_MODULE,
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};
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static const struct iio_info ad5501_info = {
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.write_raw = ad5504_write_raw,
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.read_raw = ad5504_read_raw,
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.attrs = &ad5501_attribute_group,
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.event_attrs = &ad5504_ev_attribute_group,
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.driver_module = THIS_MODULE,
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@ -308,10 +314,14 @@ static int __devinit ad5504_probe(struct spi_device *spi)
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st->spi = spi;
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indio_dev->dev.parent = &spi->dev;
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indio_dev->name = spi_get_device_id(st->spi)->name;
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if (spi_get_device_id(st->spi)->driver_data == ID_AD5501)
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if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) {
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indio_dev->info = &ad5501_info;
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else
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indio_dev->num_channels = 1;
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} else {
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indio_dev->info = &ad5504_info;
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indio_dev->num_channels = 4;
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}
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indio_dev->channels = ad5504_channels;
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indio_dev->modes = INDIO_DIRECT_MODE;
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if (spi->irq) {
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@ -18,10 +18,7 @@
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/* Registers */
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#define AD5504_ADDR_NOOP 0
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#define AD5504_ADDR_DAC0 1
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#define AD5504_ADDR_DAC1 2
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#define AD5504_ADDR_DAC2 3
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#define AD5504_ADDR_DAC3 4
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#define AD5504_ADDR_DAC(x) ((x) + 1)
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#define AD5504_ADDR_ALL_DAC 5
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#define AD5504_ADDR_CTRL 7
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