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-rw-r--r--drivers/iio/adc/Kconfig15
-rw-r--r--drivers/iio/adc/Makefile1
-rw-r--r--drivers/iio/adc/ad7476.c (renamed from drivers/staging/iio/adc/ad7476_core.c)208
-rw-r--r--drivers/iio/dac/Kconfig11
-rw-r--r--drivers/iio/dac/Makefile1
-rw-r--r--drivers/iio/dac/ad5755.c650
-rw-r--r--drivers/iio/industrialio-core.c6
-rw-r--r--drivers/iio/inkern.c131
-rw-r--r--drivers/staging/iio/Documentation/inkernel.txt6
-rw-r--r--drivers/staging/iio/adc/Kconfig14
-rw-r--r--drivers/staging/iio/adc/Makefile4
-rw-r--r--drivers/staging/iio/adc/ad7476.h66
-rw-r--r--drivers/staging/iio/adc/ad7476_ring.c64
-rw-r--r--drivers/staging/iio/iio_hwmon.c33
-rw-r--r--drivers/staging/iio/trigger/iio-trig-bfin-timer.c109
-rw-r--r--drivers/staging/iio/trigger/iio-trig-bfin-timer.h24
16 files changed, 1072 insertions, 271 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index d0ae71ec2aa0..03791a6de349 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -30,6 +30,21 @@ config AD7791
To compile this driver as a module, choose M here: the module will be
called ad7791.
+config AD7476
+ tristate "Analog Devices AD7476 and similar 1-channel ADCs driver"
+ depends on SPI
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say yes here to build support for Analog Devices AD7273, AD7274, AD7276,
+ AD7277, AD7278, AD7475, AD7476, AD7477, AD7478, AD7466, AD7467, AD7468,
+ AD7495, AD7910, AD7920, AD7920 SPI analog to digital converters (ADC).
+
+ If unsure, say N (but it's safe to say "Y").
+
+ To compile this driver as a module, choose M here: the
+ module will be called ad7476.
+
config AT91_ADC
tristate "Atmel AT91 ADC"
depends on ARCH_AT91
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index f187ff6c2a16..9824a70f4fd8 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -4,5 +4,6 @@
obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o
obj-$(CONFIG_AD7266) += ad7266.o
+obj-$(CONFIG_AD7476) += ad7476.o
obj-$(CONFIG_AD7791) += ad7791.o
obj-$(CONFIG_AT91_ADC) += at91_adc.o
diff --git a/drivers/staging/iio/adc/ad7476_core.c b/drivers/iio/adc/ad7476.c
index 4f6d59e89fcd..7f2f45a0a48d 100644
--- a/drivers/staging/iio/adc/ad7476_core.c
+++ b/drivers/iio/adc/ad7476.c
@@ -18,8 +18,76 @@
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
-#include "ad7476.h"
+#define RES_MASK(bits) ((1 << (bits)) - 1)
+
+struct ad7476_state;
+
+struct ad7476_chip_info {
+ unsigned int int_vref_uv;
+ struct iio_chan_spec channel[2];
+ void (*reset)(struct ad7476_state *);
+};
+
+struct ad7476_state {
+ struct spi_device *spi;
+ const struct ad7476_chip_info *chip_info;
+ struct regulator *reg;
+ struct spi_transfer xfer;
+ struct spi_message msg;
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ * Make the buffer large enough for one 16 bit sample and one 64 bit
+ * aligned 64 bit timestamp.
+ */
+ unsigned char data[ALIGN(2, sizeof(s64)) + sizeof(s64)]
+ ____cacheline_aligned;
+};
+
+enum ad7476_supported_device_ids {
+ ID_AD7091R,
+ ID_AD7276,
+ ID_AD7277,
+ ID_AD7278,
+ ID_AD7466,
+ ID_AD7467,
+ ID_AD7468,
+ ID_AD7495,
+ ID_AD7940,
+};
+
+static irqreturn_t ad7476_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct ad7476_state *st = iio_priv(indio_dev);
+ s64 time_ns;
+ int b_sent;
+
+ b_sent = spi_sync(st->spi, &st->msg);
+ if (b_sent < 0)
+ goto done;
+
+ time_ns = iio_get_time_ns();
+
+ if (indio_dev->scan_timestamp)
+ ((s64 *)st->data)[1] = time_ns;
+
+ iio_push_to_buffer(indio_dev->buffer, st->data);
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static void ad7091_reset(struct ad7476_state *st)
+{
+ /* Any transfers with 8 scl cycles will reset the device */
+ spi_read(st->spi, st->data, 1);
+}
static int ad7476_scan_direct(struct ad7476_state *st)
{
@@ -29,7 +97,7 @@ static int ad7476_scan_direct(struct ad7476_state *st)
if (ret)
return ret;
- return (st->data[0] << 8) | st->data[1];
+ return be16_to_cpup((__be16 *)st->data);
}
static int ad7476_read_raw(struct iio_dev *indio_dev,
@@ -40,7 +108,7 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
{
int ret;
struct ad7476_state *st = iio_priv(indio_dev);
- unsigned int scale_uv;
+ int scale_uv;
switch (m) {
case IIO_CHAN_INFO_RAW:
@@ -57,62 +125,80 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
RES_MASK(st->chip_info->channel[0].scan_type.realbits);
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
- scale_uv = (st->int_vref_mv * 1000)
- >> st->chip_info->channel[0].scan_type.realbits;
- *val = scale_uv/1000;
- *val2 = (scale_uv%1000)*1000;
+ if (!st->chip_info->int_vref_uv) {
+ scale_uv = regulator_get_voltage(st->reg);
+ if (scale_uv < 0)
+ return scale_uv;
+ } else {
+ scale_uv = st->chip_info->int_vref_uv;
+ }
+ scale_uv >>= chan->scan_type.realbits;
+ *val = scale_uv / 1000;
+ *val2 = (scale_uv % 1000) * 1000;
return IIO_VAL_INT_PLUS_MICRO;
}
return -EINVAL;
}
-#define AD7476_CHAN(bits) \
+#define _AD7476_CHAN(bits, _shift, _info_mask) \
{ \
.type = IIO_VOLTAGE, \
.indexed = 1, \
- .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+ .info_mask = _info_mask | \
IIO_CHAN_INFO_SCALE_SHARED_BIT, \
.scan_type = { \
.sign = 'u', \
- .realbits = bits, \
+ .realbits = (bits), \
.storagebits = 16, \
- .shift = 12 - bits, \
+ .shift = (_shift), \
+ .endianness = IIO_BE, \
}, \
}
+#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits), \
+ IIO_CHAN_INFO_RAW_SEPARATE_BIT)
+#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
+ IIO_CHAN_INFO_RAW_SEPARATE_BIT)
+#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)
+
static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
- [ID_AD7466] = {
- .channel[0] = AD7476_CHAN(12),
+ [ID_AD7091R] = {
+ .channel[0] = AD7091R_CHAN(12),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+ .reset = ad7091_reset,
},
- [ID_AD7467] = {
- .channel[0] = AD7476_CHAN(10),
+ [ID_AD7276] = {
+ .channel[0] = AD7940_CHAN(12),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
- [ID_AD7468] = {
- .channel[0] = AD7476_CHAN(8),
+ [ID_AD7277] = {
+ .channel[0] = AD7940_CHAN(10),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
- [ID_AD7475] = {
- .channel[0] = AD7476_CHAN(12),
+ [ID_AD7278] = {
+ .channel[0] = AD7940_CHAN(8),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
- [ID_AD7476] = {
+ [ID_AD7466] = {
.channel[0] = AD7476_CHAN(12),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
- [ID_AD7477] = {
+ [ID_AD7467] = {
.channel[0] = AD7476_CHAN(10),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
- [ID_AD7478] = {
+ [ID_AD7468] = {
.channel[0] = AD7476_CHAN(8),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_AD7495] = {
.channel[0] = AD7476_CHAN(12),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
- .int_vref_mv = 2500,
+ .int_vref_uv = 2500000,
+ },
+ [ID_AD7940] = {
+ .channel[0] = AD7940_CHAN(14),
+ .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
};
@@ -123,10 +209,9 @@ static const struct iio_info ad7476_info = {
static int __devinit ad7476_probe(struct spi_device *spi)
{
- struct ad7476_platform_data *pdata = spi->dev.platform_data;
struct ad7476_state *st;
struct iio_dev *indio_dev;
- int ret, voltage_uv = 0;
+ int ret;
indio_dev = iio_device_alloc(sizeof(*st));
if (indio_dev == NULL) {
@@ -134,25 +219,18 @@ static int __devinit ad7476_probe(struct spi_device *spi)
goto error_ret;
}
st = iio_priv(indio_dev);
- st->reg = regulator_get(&spi->dev, "vcc");
- if (!IS_ERR(st->reg)) {
- ret = regulator_enable(st->reg);
- if (ret)
- goto error_put_reg;
-
- voltage_uv = regulator_get_voltage(st->reg);
- }
st->chip_info =
&ad7476_chip_info_tbl[spi_get_device_id(spi)->driver_data];
- if (st->chip_info->int_vref_mv)
- st->int_vref_mv = st->chip_info->int_vref_mv;
- else if (pdata && pdata->vref_mv)
- st->int_vref_mv = pdata->vref_mv;
- else if (voltage_uv)
- st->int_vref_mv = voltage_uv / 1000;
- else
- dev_warn(&spi->dev, "reference voltage unspecified\n");
+ st->reg = regulator_get(&spi->dev, "vcc");
+ if (IS_ERR(st->reg)) {
+ ret = PTR_ERR(st->reg);
+ goto error_free_dev;
+ }
+
+ ret = regulator_enable(st->reg);
+ if (ret)
+ goto error_put_reg;
spi_set_drvdata(spi, indio_dev);
@@ -173,23 +251,26 @@ static int __devinit ad7476_probe(struct spi_device *spi)
spi_message_init(&st->msg);
spi_message_add_tail(&st->xfer, &st->msg);
- ret = ad7476_register_ring_funcs_and_init(indio_dev);
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ &ad7476_trigger_handler, NULL);
if (ret)
goto error_disable_reg;
+ if (st->chip_info->reset)
+ st->chip_info->reset(st);
+
ret = iio_device_register(indio_dev);
if (ret)
goto error_ring_unregister;
return 0;
error_ring_unregister:
- ad7476_ring_cleanup(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
error_disable_reg:
- if (!IS_ERR(st->reg))
- regulator_disable(st->reg);
+ regulator_disable(st->reg);
error_put_reg:
- if (!IS_ERR(st->reg))
- regulator_put(st->reg);
+ regulator_put(st->reg);
+error_free_dev:
iio_device_free(indio_dev);
error_ret:
@@ -202,28 +283,35 @@ static int __devexit ad7476_remove(struct spi_device *spi)
struct ad7476_state *st = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
- ad7476_ring_cleanup(indio_dev);
- if (!IS_ERR(st->reg)) {
- regulator_disable(st->reg);
- regulator_put(st->reg);
- }
+ iio_triggered_buffer_cleanup(indio_dev);
+ regulator_disable(st->reg);
+ regulator_put(st->reg);
iio_device_free(indio_dev);
return 0;
}
static const struct spi_device_id ad7476_id[] = {
+ {"ad7091r", ID_AD7091R},
+ {"ad7273", ID_AD7277},
+ {"ad7274", ID_AD7276},
+ {"ad7276", ID_AD7276},
+ {"ad7277", ID_AD7277},
+ {"ad7278", ID_AD7278},
{"ad7466", ID_AD7466},
{"ad7467", ID_AD7467},
{"ad7468", ID_AD7468},
- {"ad7475", ID_AD7475},
- {"ad7476", ID_AD7476},
- {"ad7476a", ID_AD7476},
- {"ad7477", ID_AD7477},
- {"ad7477a", ID_AD7477},
- {"ad7478", ID_AD7478},
- {"ad7478a", ID_AD7478},
+ {"ad7475", ID_AD7466},
+ {"ad7476", ID_AD7466},
+ {"ad7476a", ID_AD7466},
+ {"ad7477", ID_AD7467},
+ {"ad7477a", ID_AD7467},
+ {"ad7478", ID_AD7468},
+ {"ad7478a", ID_AD7468},
{"ad7495", ID_AD7495},
+ {"ad7910", ID_AD7467},
+ {"ad7920", ID_AD7466},
+ {"ad7940", ID_AD7940},
{}
};
MODULE_DEVICE_TABLE(spi, ad7476_id);
@@ -240,5 +328,5 @@ static struct spi_driver ad7476_driver = {
module_spi_driver(ad7476_driver);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("Analog Devices AD7475/6/7/8(A) AD7466/7/8 ADC");
+MODULE_DESCRIPTION("Analog Devices AD7476 and similar 1-channel ADCs");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index 78452630f85d..b1c0ee5294ca 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -77,6 +77,17 @@ config AD5504
To compile this driver as a module, choose M here: the
module will be called ad5504.
+config AD5755
+ tristate "Analog Devices AD5755/AD5755-1/AD5757/AD5735/AD5737 DAC driver"
+ depends on SPI_MASTER
+ help
+ Say yes here to build support for Analog Devices AD5755, AD5755-1,
+ AD5757, AD5735, AD5737 quad channel Digital to
+ Analog Converter.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ad5755.
+
config AD5764
tristate "Analog Devices AD5764/64R/44/44R DAC driver"
depends on SPI_MASTER
diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile
index 9ea3ceeefc07..c0d333b23ba3 100644
--- a/drivers/iio/dac/Makefile
+++ b/drivers/iio/dac/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o
obj-$(CONFIG_AD5064) += ad5064.o
obj-$(CONFIG_AD5504) += ad5504.o
obj-$(CONFIG_AD5446) += ad5446.o
+obj-$(CONFIG_AD5755) += ad5755.o
obj-$(CONFIG_AD5764) += ad5764.o
obj-$(CONFIG_AD5791) += ad5791.o
obj-$(CONFIG_AD5686) += ad5686.o
diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c
new file mode 100644
index 000000000000..e6dbe5ff7e5a
--- /dev/null
+++ b/drivers/iio/dac/ad5755.c
@@ -0,0 +1,650 @@
+/*
+ * AD5755, AD5755-1, AD5757, AD5735, AD5737 Digital to analog converters driver
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/platform_data/ad5755.h>
+
+#define AD5755_NUM_CHANNELS 4
+
+#define AD5755_ADDR(x) ((x) << 16)
+
+#define AD5755_WRITE_REG_DATA(chan) (chan)
+#define AD5755_WRITE_REG_GAIN(chan) (0x08 | (chan))
+#define AD5755_WRITE_REG_OFFSET(chan) (0x10 | (chan))
+#define AD5755_WRITE_REG_CTRL(chan) (0x1c | (chan))
+
+#define AD5755_READ_REG_DATA(chan) (chan)
+#define AD5755_READ_REG_CTRL(chan) (0x4 | (chan))
+#define AD5755_READ_REG_GAIN(chan) (0x8 | (chan))
+#define AD5755_READ_REG_OFFSET(chan) (0xc | (chan))
+#define AD5755_READ_REG_CLEAR(chan) (0x10 | (chan))
+#define AD5755_READ_REG_SLEW(chan) (0x14 | (chan))
+#define AD5755_READ_REG_STATUS 0x18
+#define AD5755_READ_REG_MAIN 0x19
+#define AD5755_READ_REG_DC_DC 0x1a
+
+#define AD5755_CTRL_REG_SLEW 0x0
+#define AD5755_CTRL_REG_MAIN 0x1
+#define AD5755_CTRL_REG_DAC 0x2
+#define AD5755_CTRL_REG_DC_DC 0x3
+#define AD5755_CTRL_REG_SW 0x4
+
+#define AD5755_READ_FLAG 0x800000
+
+#define AD5755_NOOP 0x1CE000
+
+#define AD5755_DAC_INT_EN BIT(8)
+#define AD5755_DAC_CLR_EN BIT(7)
+#define AD5755_DAC_OUT_EN BIT(6)
+#define AD5755_DAC_INT_CURRENT_SENSE_RESISTOR BIT(5)
+#define AD5755_DAC_DC_DC_EN BIT(4)
+#define AD5755_DAC_VOLTAGE_OVERRANGE_EN BIT(3)
+
+#define AD5755_DC_DC_MAXV 0
+#define AD5755_DC_DC_FREQ_SHIFT 2
+#define AD5755_DC_DC_PHASE_SHIFT 4
+#define AD5755_EXT_DC_DC_COMP_RES BIT(6)
+
+#define AD5755_SLEW_STEP_SIZE_SHIFT 0
+#define AD5755_SLEW_RATE_SHIFT 3
+#define AD5755_SLEW_ENABLE BIT(12)
+
+/**
+ * struct ad5755_chip_info - chip specific information
+ * @channel_template: channel specification
+ * @calib_shift: shift for the calibration data registers
+ * @has_voltage_out: whether the chip has voltage outputs
+ */
+struct ad5755_chip_info {
+ const struct iio_chan_spec channel_template;
+ unsigned int calib_shift;
+ bool has_voltage_out;
+};
+
+/**
+ * struct ad5755_state - driver instance specific data
+ * @spi: spi device the driver is attached to
+ * @chip_info: chip model specific constants, available modes etc
+ * @pwr_down: bitmask which contains hether a channel is powered down or not
+ * @ctrl: software shadow of the channel ctrl registers
+ * @channels: iio channel spec for the device
+ * @data: spi transfer buffers
+ */
+struct ad5755_state {
+ struct spi_device *spi;
+ const struct ad5755_chip_info *chip_info;
+ unsigned int pwr_down;
+ unsigned int ctrl[AD5755_NUM_CHANNELS];
+ struct iio_chan_spec channels[AD5755_NUM_CHANNELS];
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+
+ union {
+ u32 d32;
+ u8 d8[4];
+ } data[2] ____cacheline_aligned;
+};
+
+enum ad5755_type {
+ ID_AD5755,
+ ID_AD5757,
+ ID_AD5735,
+ ID_AD5737,
+};
+
+static int ad5755_write_unlocked(struct iio_dev *indio_dev,
+ unsigned int reg, unsigned int val)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+
+ st->data[0].d32 = cpu_to_be32((reg << 16) | val);
+
+ return spi_write(st->spi, &st->data[0].d8[1], 3);
+}
+
+static int ad5755_write_ctrl_unlocked(struct iio_dev *indio_dev,
+ unsigned int channel, unsigned int reg, unsigned int val)
+{
+ return ad5755_write_unlocked(indio_dev,
+ AD5755_WRITE_REG_CTRL(channel), (reg << 13) | val);
+}
+
+static int ad5755_write(struct iio_dev *indio_dev, unsigned int reg,
+ unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&indio_dev->mlock);
+ ret = ad5755_write_unlocked(indio_dev, reg, val);
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static int ad5755_write_ctrl(struct iio_dev *indio_dev, unsigned int channel,
+ unsigned int reg, unsigned int val)
+{
+ int ret;
+
+ mutex_lock(&indio_dev->mlock);
+ ret = ad5755_write_ctrl_unlocked(indio_dev, channel, reg, val);
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static int ad5755_read(struct iio_dev *indio_dev, unsigned int addr)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+ struct spi_message m;
+ int ret;
+ struct spi_transfer t[] = {
+ {
+ .tx_buf = &st->data[0].d8[1],
+ .len = 3,
+ .cs_change = 1,
+ }, {
+ .tx_buf = &st->data[1].d8[1],
+ .rx_buf = &st->data[1].d8[1],
+ .len = 3,
+ },
+ };
+
+ spi_message_init(&m);
+ spi_message_add_tail(&t[0], &m);
+ spi_message_add_tail(&t[1], &m);
+
+ mutex_lock(&indio_dev->mlock);
+
+ st->data[0].d32 = cpu_to_be32(AD5755_READ_FLAG | (addr << 16));
+ st->data[1].d32 = cpu_to_be32(AD5755_NOOP);
+
+ ret = spi_sync(st->spi, &m);
+ if (ret >= 0)
+ ret = be32_to_cpu(st->data[1].d32) & 0xffff;
+
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static int ad5755_update_dac_ctrl(struct iio_dev *indio_dev,
+ unsigned int channel, unsigned int set, unsigned int clr)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+ int ret;
+
+ st->ctrl[channel] |= set;
+ st->ctrl[channel] &= ~clr;
+
+ ret = ad5755_write_ctrl_unlocked(indio_dev, channel,
+ AD5755_CTRL_REG_DAC, st->ctrl[channel]);
+
+ return ret;
+}
+
+static int ad5755_set_channel_pwr_down(struct iio_dev *indio_dev,
+ unsigned int channel, bool pwr_down)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+ unsigned int mask = BIT(channel);
+
+ mutex_lock(&indio_dev->mlock);
+
+ if ((bool)(st->pwr_down & mask) == pwr_down)
+ goto out_unlock;
+
+ if (!pwr_down) {
+ st->pwr_down &= ~mask;
+ ad5755_update_dac_ctrl(indio_dev, channel,
+ AD5755_DAC_INT_EN | AD5755_DAC_DC_DC_EN, 0);
+ udelay(200);
+ ad5755_update_dac_ctrl(indio_dev, channel,
+ AD5755_DAC_OUT_EN, 0);
+ } else {
+ st->pwr_down |= mask;
+ ad5755_update_dac_ctrl(indio_dev, channel,
+ 0, AD5755_DAC_INT_EN | AD5755_DAC_OUT_EN |
+ AD5755_DAC_DC_DC_EN);
+ }
+
+out_unlock:
+ mutex_unlock(&indio_dev->mlock);
+
+ return 0;
+}
+
+static const int ad5755_min_max_table[][2] = {
+ [AD5755_MODE_VOLTAGE_0V_5V] = { 0, 5000 },
+ [AD5755_MODE_VOLTAGE_0V_10V] = { 0, 10000 },
+ [AD5755_MODE_VOLTAGE_PLUSMINUS_5V] = { -5000, 5000 },
+ [AD5755_MODE_VOLTAGE_PLUSMINUS_10V] = { -10000, 10000 },
+ [AD5755_MODE_CURRENT_4mA_20mA] = { 4, 20 },
+ [AD5755_MODE_CURRENT_0mA_20mA] = { 0, 20 },
+ [AD5755_MODE_CURRENT_0mA_24mA] = { 0, 24 },
+};
+
+static void ad5755_get_min_max(struct ad5755_state *st,
+ struct iio_chan_spec const *chan, int *min, int *max)
+{
+ enum ad5755_mode mode = st->ctrl[chan->channel] & 7;
+ *min = ad5755_min_max_table[mode][0];
+ *max = ad5755_min_max_table[mode][1];
+}
+
+static inline int ad5755_get_offset(struct ad5755_state *st,
+ struct iio_chan_spec const *chan)
+{
+ int min, max;
+
+ ad5755_get_min_max(st, chan, &min, &max);
+ return (min * (1 << chan->scan_type.realbits)) / (max - min);
+}
+
+static inline int ad5755_get_scale(struct ad5755_state *st,
+ struct iio_chan_spec const *chan)
+{
+ int min, max;
+
+ ad5755_get_min_max(st, chan, &min, &max);
+ return ((max - min) * 1000000000ULL) >> chan->scan_type.realbits;
+}
+
+static int ad5755_chan_reg_info(struct ad5755_state *st,
+ struct iio_chan_spec const *chan, long info, bool write,
+ unsigned int *reg, unsigned int *shift, unsigned int *offset)
+{
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ if (write)
+ *reg = AD5755_WRITE_REG_DATA(chan->address);
+ else
+ *reg = AD5755_READ_REG_DATA(chan->address);
+ *shift = chan->scan_type.shift;
+ *offset = 0;
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (write)
+ *reg = AD5755_WRITE_REG_OFFSET(chan->address);
+ else
+ *reg = AD5755_READ_REG_OFFSET(chan->address);
+ *shift = st->chip_info->calib_shift;
+ *offset = 32768;
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (write)
+ *reg = AD5755_WRITE_REG_GAIN(chan->address);
+ else
+ *reg = AD5755_READ_REG_GAIN(chan->address);
+ *shift = st->chip_info->calib_shift;
+ *offset = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ad5755_read_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int *val, int *val2, long info)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+ unsigned int reg, shift, offset;
+ int ret;
+
+ switch (info) {
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = ad5755_get_scale(st, chan);
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = ad5755_get_offset(st, chan);
+ return IIO_VAL_INT;
+ default:
+ ret = ad5755_chan_reg_info(st, chan, info, false,
+ &reg, &shift, &offset);
+ if (ret)
+ return ret;
+
+ ret = ad5755_read(indio_dev, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = (ret - offset) >> shift;
+
+ return IIO_VAL_INT;
+ }
+
+ return -EINVAL;
+}
+
+static int ad5755_write_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, int val, int val2, long info)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+ unsigned int shift, reg, offset;
+ int ret;
+
+ ret = ad5755_chan_reg_info(st, chan, info, true,
+ &reg, &shift, &offset);
+ if (ret)
+ return ret;
+
+ val <<= shift;
+ val += offset;
+
+ if (val < 0 || val > 0xffff)
+ return -EINVAL;
+
+ return ad5755_write(indio_dev, reg, val);
+}
+
+static ssize_t ad5755_read_powerdown(struct iio_dev *indio_dev, uintptr_t priv,
+ const struct iio_chan_spec *chan, char *buf)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+
+ return sprintf(buf, "%d\n",
+ (bool)(st->pwr_down & (1 << chan->channel)));
+}
+
+static ssize_t ad5755_write_powerdown(struct iio_dev *indio_dev, uintptr_t priv,
+ struct iio_chan_spec const *chan, const char *buf, size_t len)
+{
+ bool pwr_down;
+ int ret;
+
+ ret = strtobool(buf, &pwr_down);
+ if (ret)
+ return ret;
+
+ ret = ad5755_set_channel_pwr_down(indio_dev, chan->channel, pwr_down);
+ return ret ? ret : len;
+}
+
+static const struct iio_info ad5755_info = {
+ .read_raw = ad5755_read_raw,
+ .write_raw = ad5755_write_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static const struct iio_chan_spec_ext_info ad5755_ext_info[] = {
+ {
+ .name = "powerdown",
+ .read = ad5755_read_powerdown,
+ .write = ad5755_write_powerdown,
+ },
+ { },
+};
+
+#define AD5755_CHANNEL(_bits) { \
+ .indexed = 1, \
+ .output = 1, \
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+ IIO_CHAN_INFO_SCALE_SEPARATE_BIT | \
+ IIO_CHAN_INFO_OFFSET_SEPARATE_BIT | \
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT | \
+ IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, \
+ .scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \
+ .ext_info = ad5755_ext_info, \
+}
+
+static const struct ad5755_chip_info ad5755_chip_info_tbl[] = {
+ [ID_AD5735] = {
+ .channel_template = AD5755_CHANNEL(14),
+ .has_voltage_out = true,
+ .calib_shift = 4,
+ },
+ [ID_AD5737] = {
+ .channel_template = AD5755_CHANNEL(14),
+ .has_voltage_out = false,
+ .calib_shift = 4,
+ },
+ [ID_AD5755] = {
+ .channel_template = AD5755_CHANNEL(16),
+ .has_voltage_out = true,
+ .calib_shift = 0,
+ },
+ [ID_AD5757] = {
+ .channel_template = AD5755_CHANNEL(16),
+ .has_voltage_out = false,
+ .calib_shift = 0,
+ },
+};
+
+static bool ad5755_is_valid_mode(struct ad5755_state *st, enum ad5755_mode mode)
+{
+ switch (mode) {
+ case AD5755_MODE_VOLTAGE_0V_5V:
+ case AD5755_MODE_VOLTAGE_0V_10V:
+ case AD5755_MODE_VOLTAGE_PLUSMINUS_5V:
+ case AD5755_MODE_VOLTAGE_PLUSMINUS_10V:
+ return st->chip_info->has_voltage_out;
+ case AD5755_MODE_CURRENT_4mA_20mA:
+ case AD5755_MODE_CURRENT_0mA_20mA:
+ case AD5755_MODE_CURRENT_0mA_24mA:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static int __devinit ad5755_setup_pdata(struct iio_dev *indio_dev,
+ const struct ad5755_platform_data *pdata)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+ unsigned int ret;
+ unsigned int val;
+ unsigned int i;
+
+ if (pdata->dc_dc_phase > AD5755_DC_DC_PHASE_90_DEGREE ||
+ pdata->dc_dc_freq > AD5755_DC_DC_FREQ_650kHZ ||
+ pdata->dc_dc_maxv > AD5755_DC_DC_MAXV_29V5)
+ return -EINVAL;
+
+ val = pdata->dc_dc_maxv << AD5755_DC_DC_MAXV;
+ val |= pdata->dc_dc_freq << AD5755_DC_DC_FREQ_SHIFT;
+ val |= pdata->dc_dc_phase << AD5755_DC_DC_PHASE_SHIFT;
+ if (pdata->ext_dc_dc_compenstation_resistor)
+ val |= AD5755_EXT_DC_DC_COMP_RES;
+
+ ret = ad5755_write_ctrl(indio_dev, 0, AD5755_CTRL_REG_DC_DC, val);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < ARRAY_SIZE(pdata->dac); ++i) {
+ val = pdata->dac[i].slew.step_size <<
+ AD5755_SLEW_STEP_SIZE_SHIFT;
+ val |= pdata->dac[i].slew.rate <<
+ AD5755_SLEW_RATE_SHIFT;
+ if (pdata->dac[i].slew.enable)
+ val |= AD5755_SLEW_ENABLE;
+
+ ret = ad5755_write_ctrl(indio_dev, i,
+ AD5755_CTRL_REG_SLEW, val);
+ if (ret < 0)
+ return ret;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pdata->dac); ++i) {
+ if (!ad5755_is_valid_mode(st, pdata->dac[i].mode))
+ return -EINVAL;
+
+ val = 0;
+ if (!pdata->dac[i].ext_current_sense_resistor)
+ val |= AD5755_DAC_INT_CURRENT_SENSE_RESISTOR;
+ if (pdata->dac[i].enable_voltage_overrange)
+ val |= AD5755_DAC_VOLTAGE_OVERRANGE_EN;
+ val |= pdata->dac[i].mode;
+
+ ret = ad5755_update_dac_ctrl(indio_dev, i, val, 0);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static bool __devinit ad5755_is_voltage_mode(enum ad5755_mode mode)
+{
+ switch (mode) {
+ case AD5755_MODE_VOLTAGE_0V_5V:
+ case AD5755_MODE_VOLTAGE_0V_10V:
+ case AD5755_MODE_VOLTAGE_PLUSMINUS_5V:
+ case AD5755_MODE_VOLTAGE_PLUSMINUS_10V:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static int __devinit ad5755_init_channels(struct iio_dev *indio_dev,
+ const struct ad5755_platform_data *pdata)
+{
+ struct ad5755_state *st = iio_priv(indio_dev);
+ struct iio_chan_spec *channels = st->channels;
+ unsigned int i;
+
+ for (i = 0; i < AD5755_NUM_CHANNELS; ++i) {
+ channels[i] = st->chip_info->channel_template;
+ channels[i].channel = i;
+ channels[i].address = i;
+ if (pdata && ad5755_is_voltage_mode(pdata->dac[i].mode))
+ channels[i].type = IIO_VOLTAGE;
+ else
+ channels[i].type = IIO_CURRENT;
+ }
+
+ indio_dev->channels = channels;
+
+ return 0;
+}
+
+#define AD5755_DEFAULT_DAC_PDATA { \
+ .mode = AD5755_MODE_CURRENT_4mA_20mA, \
+ .ext_current_sense_resistor = true, \
+ .enable_voltage_overrange = false, \
+ .slew = { \
+ .enable = false, \
+ .rate = AD5755_SLEW_RATE_64k, \
+ .step_size = AD5755_SLEW_STEP_SIZE_1, \
+ }, \
+ }
+
+static const struct ad5755_platform_data ad5755_default_pdata = {
+ .ext_dc_dc_compenstation_resistor = false,
+ .dc_dc_phase = AD5755_DC_DC_PHASE_ALL_SAME_EDGE,
+ .dc_dc_freq = AD5755_DC_DC_FREQ_410kHZ,
+ .dc_dc_maxv = AD5755_DC_DC_MAXV_23V,
+ .dac = {
+ [0] = AD5755_DEFAULT_DAC_PDATA,
+ [1] = AD5755_DEFAULT_DAC_PDATA,
+ [2] = AD5755_DEFAULT_DAC_PDATA,
+ [3] = AD5755_DEFAULT_DAC_PDATA,
+ },
+};
+
+static int __devinit ad5755_probe(struct spi_device *spi)
+{
+ enum ad5755_type type = spi_get_device_id(spi)->driver_data;
+ const struct ad5755_platform_data *pdata = dev_get_platdata(&spi->dev);
+ struct iio_dev *indio_dev;
+ struct ad5755_state *st;
+ int ret;
+
+ indio_dev = iio_device_alloc(sizeof(*st));
+ if (indio_dev == NULL) {
+ dev_err(&spi->dev, "Failed to allocate iio device\n");
+ return -ENOMEM;
+ }
+
+ st = iio_priv(indio_dev);
+ spi_set_drvdata(spi, indio_dev);
+
+ st->chip_info = &ad5755_chip_info_tbl[type];
+ st->spi = spi;
+ st->pwr_down = 0xf;
+
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->info = &ad5755_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->num_channels = AD5755_NUM_CHANNELS;
+
+ if (!pdata)
+ pdata = &ad5755_default_pdata;
+
+ ret = ad5755_init_channels(indio_dev, pdata);
+ if (ret)
+ goto error_free;
+
+ ret = ad5755_setup_pdata(indio_dev, pdata);
+ if (ret)
+ goto error_free;
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&spi->dev, "Failed to register iio device: %d\n", ret);
+ goto error_free;
+ }
+
+ return 0;
+
+error_free:
+ iio_device_free(indio_dev);
+
+ return ret;
+}
+
+static int __devexit ad5755_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+
+ iio_device_unregister(indio_dev);
+ iio_device_free(indio_dev);
+
+ return 0;
+}
+
+static const struct spi_device_id ad5755_id[] = {
+ { "ad5755", ID_AD5755 },
+ { "ad5755-1", ID_AD5755 },
+ { "ad5757", ID_AD5757 },
+ { "ad5735", ID_AD5735 },
+ { "ad5737", ID_AD5737 },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, ad5755_id);
+
+static struct spi_driver ad5755_driver = {
+ .driver = {
+ .name = "ad5755",
+ .owner = THIS_MODULE,
+ },
+ .probe = ad5755_probe,
+ .remove = __devexit_p(ad5755_remove),
+ .id_table = ad5755_id,
+};
+module_spi_driver(ad5755_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices AD5755/55-1/57/35/37 DAC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 0499330d6e98..6eb24dbc081e 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -366,6 +366,7 @@ static ssize_t iio_read_channel_info(struct device *dev,
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ unsigned long long tmp;
int val, val2;
bool scale_db = false;
int ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
@@ -391,6 +392,11 @@ static ssize_t iio_read_channel_info(struct device *dev,
return sprintf(buf, "-%d.%09u\n", val, -val2);
else
return sprintf(buf, "%d.%09u\n", val, val2);
+ case IIO_VAL_FRACTIONAL:
+ tmp = div_s64((s64)val * 1000000000LL, val2);
+ val2 = do_div(tmp, 1000000000LL);
+ val = tmp;
+ return sprintf(buf, "%d.%09u\n", val, val2);
default:
return 0;
}
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index a14e55dd8ddc..25b00761005a 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -130,18 +130,27 @@ struct iio_channel *iio_channel_get(const char *name, const char *channel_name)
if (c == NULL)
return ERR_PTR(-ENODEV);
- channel = kmalloc(sizeof(*channel), GFP_KERNEL);
+ channel = kzalloc(sizeof(*channel), GFP_KERNEL);
if (channel == NULL)
return ERR_PTR(-ENOMEM);
channel->indio_dev = c->indio_dev;
- if (c->map->adc_channel_label)
+ if (c->map->adc_channel_label) {
channel->channel =
iio_chan_spec_from_name(channel->indio_dev,
c->map->adc_channel_label);
+ if (channel->channel == NULL)
+ goto error_no_chan;
+ }
+
return channel;
+
+error_no_chan:
+ iio_device_put(c->indio_dev);
+ kfree(channel);
+ return ERR_PTR(-EINVAL);
}
EXPORT_SYMBOL_GPL(iio_channel_get);
@@ -229,9 +238,21 @@ void iio_channel_release_all(struct iio_channel *channels)
}
EXPORT_SYMBOL_GPL(iio_channel_release_all);
+static int iio_channel_read(struct iio_channel *chan, int *val, int *val2,
+ enum iio_chan_info_enum info)
+{
+ int unused;
+
+ if (val2 == NULL)
+ val2 = &unused;
+
+ return chan->indio_dev->info->read_raw(chan->indio_dev, chan->channel,
+ val, val2, info);
+}
+
int iio_read_channel_raw(struct iio_channel *chan, int *val)
{
- int val2, ret;
+ int ret;
mutex_lock(&chan->indio_dev->info_exist_lock);
if (chan->indio_dev->info == NULL) {
@@ -239,10 +260,7 @@ int iio_read_channel_raw(struct iio_channel *chan, int *val)
goto err_unlock;
}
- ret = chan->indio_dev->info->read_raw(chan->indio_dev,
- chan->channel,
- val, &val2,
- IIO_CHAN_INFO_RAW);
+ ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW);
err_unlock:
mutex_unlock(&chan->indio_dev->info_exist_lock);
@@ -250,6 +268,100 @@ err_unlock:
}
EXPORT_SYMBOL_GPL(iio_read_channel_raw);
+static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan,
+ int raw, int *processed, unsigned int scale)
+{
+ int scale_type, scale_val, scale_val2, offset;
+ s64 raw64 = raw;
+ int ret;
+
+ ret = iio_channel_read(chan, &offset, NULL, IIO_CHAN_INFO_SCALE);
+ if (ret == 0)
+ raw64 += offset;
+
+ scale_type = iio_channel_read(chan, &scale_val, &scale_val2,
+ IIO_CHAN_INFO_SCALE);
+ if (scale_type < 0)
+ return scale_type;
+
+ switch (scale_type) {
+ case IIO_VAL_INT:
+ *processed = raw64 * scale_val;
+ break;
+ case IIO_VAL_INT_PLUS_MICRO:
+ if (scale_val2 < 0)
+ *processed = -raw64 * scale_val;
+ else
+ *processed = raw64 * scale_val;
+ *processed += div_s64(raw64 * (s64)scale_val2 * scale,
+ 1000000LL);
+ break;
+ case IIO_VAL_INT_PLUS_NANO:
+ if (scale_val2 < 0)
+ *processed = -raw64 * scale_val;
+ else
+ *processed = raw64 * scale_val;
+ *processed += div_s64(raw64 * (s64)scale_val2 * scale,
+ 1000000000LL);
+ break;
+ case IIO_VAL_FRACTIONAL:
+ *processed = div_s64(raw64 * (s64)scale_val * scale,
+ scale_val2);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int iio_convert_raw_to_processed(struct iio_channel *chan, int raw,
+ int *processed, unsigned int scale)
+{
+ int ret;
+
+ mutex_lock(&chan->indio_dev->info_exist_lock);
+ if (chan->indio_dev->info == NULL) {
+ ret = -ENODEV;
+ goto err_unlock;
+ }
+
+ ret = iio_convert_raw_to_processed_unlocked(chan, raw, processed,
+ scale);
+err_unlock:
+ mutex_unlock(&chan->indio_dev->info_exist_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(iio_convert_raw_to_processed);
+
+int iio_read_channel_processed(struct iio_channel *chan, int *val)
+{
+ int ret;
+
+ mutex_lock(&chan->indio_dev->info_exist_lock);
+ if (chan->indio_dev->info == NULL) {
+ ret = -ENODEV;
+ goto err_unlock;
+ }
+
+ if (iio_channel_has_info(chan->channel, IIO_CHAN_INFO_PROCESSED)) {
+ ret = iio_channel_read(chan, val, NULL,
+ IIO_CHAN_INFO_PROCESSED);
+ } else {
+ ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_RAW);
+ if (ret < 0)
+ goto err_unlock;
+ ret = iio_convert_raw_to_processed_unlocked(chan, *val, val, 1);
+ }
+
+err_unlock:
+ mutex_unlock(&chan->indio_dev->info_exist_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(iio_read_channel_processed);
+
int iio_read_channel_scale(struct iio_channel *chan, int *val, int *val2)
{
int ret;
@@ -260,10 +372,7 @@ int iio_read_channel_scale(struct iio_channel *chan, int *val, int *val2)
goto err_unlock;
}
- ret = chan->indio_dev->info->read_raw(chan->indio_dev,
- chan->channel,
- val, val2,
- IIO_CHAN_INFO_SCALE);
+ ret = iio_channel_read(chan, val, val2, IIO_CHAN_INFO_SCALE);
err_unlock:
mutex_unlock(&chan->indio_dev->info_exist_lock);
diff --git a/drivers/staging/iio/Documentation/inkernel.txt b/drivers/staging/iio/Documentation/inkernel.txt
index a05823e955d2..ab528409bba6 100644
--- a/drivers/staging/iio/Documentation/inkernel.txt
+++ b/drivers/staging/iio/Documentation/inkernel.txt
@@ -48,11 +48,11 @@ There are then a number of functions that can be used to get information
about this channel such as it's current reading.
e.g.
-iio_st_read_channel_raw() - get a reading
-iio_st_read_channel_type() - get the type of channel
+iio_read_channel_raw() - get a reading
+iio_get_channel_type() - get the type of channel
There is also provision for retrieving all of the channels associated
with a given consumer. This is useful for generic drivers such as
iio_hwmon where the number and naming of channels is not known by the
-consumer driver. To do this, use iio_st_channel_get_all.
+consumer driver. To do this, use iio_channel_get_all.
diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig
index a1fa1729acbe..1b4a356639a5 100644
--- a/drivers/staging/iio/adc/Kconfig
+++ b/drivers/staging/iio/adc/Kconfig
@@ -68,20 +68,6 @@ config AD799X_RING_BUFFER
Say yes here to include ring buffer support in the AD799X
ADC driver.
-config AD7476
- tristate "Analog Devices AD7475/6/7/8 AD7466/7/8 and AD7495 ADC driver"
- depends on SPI
- select IIO_BUFFER
- select IIO_TRIGGERED_BUFFER
- help
- Say yes here to build support for Analog Devices
- AD7475, AD7476, AD7477, AD7478, AD7466, AD7467, AD7468, AD7495
- SPI analog to digital converters (ADC).
- If unsure, say N (but it's safe to say "Y").
-
- To compile this driver as a module, choose M here: the
- module will be called ad7476.
-
config AD7887
tristate "Analog Devices AD7887 ADC driver"
depends on SPI
diff --git a/drivers/staging/iio/adc/Makefile b/drivers/staging/iio/adc/Makefile
index ecac9a0bb358..62ee02e80cf9 100644
--- a/drivers/staging/iio/adc/Makefile
+++ b/drivers/staging/iio/adc/Makefile
@@ -17,10 +17,6 @@ ad799x-y := ad799x_core.o
ad799x-$(CONFIG_AD799X_RING_BUFFER) += ad799x_ring.o
obj-$(CONFIG_AD799X) += ad799x.o
-ad7476-y := ad7476_core.o
-ad7476-$(CONFIG_IIO_BUFFER) += ad7476_ring.o
-obj-$(CONFIG_AD7476) += ad7476.o
-
ad7887-y := ad7887_core.o
ad7887-$(CONFIG_IIO_BUFFER) += ad7887_ring.o
obj-$(CONFIG_AD7887) += ad7887.o
diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h
deleted file mode 100644
index b1dd9317fe1f..000000000000
--- a/drivers/staging/iio/adc/ad7476.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * AD7476/5/7/8 (A) SPI ADC driver
- *
- * Copyright 2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-#ifndef IIO_ADC_AD7476_H_
-#define IIO_ADC_AD7476_H_
-
-#define RES_MASK(bits) ((1 << (bits)) - 1)
-
-/*
- * TODO: struct ad7476_platform_data needs to go into include/linux/iio
- */
-
-struct ad7476_platform_data {
- u16 vref_mv;
-};
-
-struct ad7476_chip_info {
- u16 int_vref_mv;
- struct iio_chan_spec channel[2];
-};
-
-struct ad7476_state {
- struct spi_device *spi;
- const struct ad7476_chip_info *chip_info;
- struct regulator *reg;
- u16 int_vref_mv;
- struct spi_transfer xfer;
- struct spi_message msg;
- /*
- * DMA (thus cache coherency maintenance) requires the
- * transfer buffers to live in their own cache lines.
- */
- unsigned char data[2] ____cacheline_aligned;
-};
-
-enum ad7476_supported_device_ids {
- ID_AD7466,
- ID_AD7467,
- ID_AD7468,
- ID_AD7475,
- ID_AD7476,
- ID_AD7477,
- ID_AD7478,
- ID_AD7495
-};
-
-#ifdef CONFIG_IIO_BUFFER
-int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev);
-void ad7476_ring_cleanup(struct iio_dev *indio_dev);
-#else /* CONFIG_IIO_BUFFER */
-
-static inline int
-ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)
-{
- return 0;
-}
-
-static inline void ad7476_ring_cleanup(struct iio_dev *indio_dev)
-{
-}
-#endif /* CONFIG_IIO_BUFFER */
-#endif /* IIO_ADC_AD7476_H_ */
diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c
deleted file mode 100644
index 940681f29b87..000000000000
--- a/drivers/staging/iio/adc/ad7476_ring.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright 2010-2012 Analog Devices Inc.
- * Copyright (C) 2008 Jonathan Cameron
- *
- * Licensed under the GPL-2 or later.
- *
- * ad7476_ring.c
- */
-
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/spi/spi.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/buffer.h>
-#include <linux/iio/trigger_consumer.h>
-#include <linux/iio/triggered_buffer.h>
-
-#include "ad7476.h"
-
-static irqreturn_t ad7476_trigger_handler(int irq, void *p)
-{
- struct iio_poll_func *pf = p;
- struct iio_dev *indio_dev = pf->indio_dev;
- struct ad7476_state *st = iio_priv(indio_dev);
- s64 time_ns;
- __u8 *rxbuf;
- int b_sent;
-
- rxbuf = kzalloc(indio_dev->scan_bytes, GFP_KERNEL);
- if (rxbuf == NULL)
- goto done;
-
- b_sent = spi_read(st->spi, rxbuf,
- st->chip_info->channel[0].scan_type.storagebits / 8);
- if (b_sent < 0)
- goto done;
-
- time_ns = iio_get_time_ns();
-
- if (indio_dev->scan_timestamp)
- memcpy(rxbuf + indio_dev->scan_bytes - sizeof(s64),
- &time_ns, sizeof(time_ns));
-
- iio_push_to_buffer(indio_dev->buffer, rxbuf);
-done:
- iio_trigger_notify_done(indio_dev->trig);
- kfree(rxbuf);
-
- return IRQ_HANDLED;
-}
-
-int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)
-{
- return iio_triggered_buffer_setup(indio_dev, NULL,
- &ad7476_trigger_handler, NULL);
-}
-
-void ad7476_ring_cleanup(struct iio_dev *indio_dev)
-{
- iio_triggered_buffer_cleanup(indio_dev);
-}
diff --git a/drivers/staging/iio/iio_hwmon.c b/drivers/staging/iio/iio_hwmon.c
index 69d4a3b0ced4..5d491227e01b 100644
--- a/drivers/staging/iio/iio_hwmon.c
+++ b/drivers/staging/iio/iio_hwmon.c
@@ -42,40 +42,17 @@ static ssize_t iio_hwmon_read_val(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- long result;
- int val, ret, scaleint, scalepart;
+ int result;
+ int ret;
struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr);
struct iio_hwmon_state *state = dev_get_drvdata(dev);
- /*
- * No locking between this pair, so theoretically possible
- * the scale has changed.
- */
- ret = iio_read_channel_raw(&state->channels[sattr->index],
- &val);
+ ret = iio_read_channel_processed(&state->channels[sattr->index],
+ &result);
if (ret < 0)
return ret;
- ret = iio_read_channel_scale(&state->channels[sattr->index],
- &scaleint, &scalepart);
- if (ret < 0)
- return ret;
- switch (ret) {
- case IIO_VAL_INT:
- result = val * scaleint;
- break;
- case IIO_VAL_INT_PLUS_MICRO:
- result = (s64)val * (s64)scaleint +
- div_s64((s64)val * (s64)scalepart, 1000000LL);
- break;
- case IIO_VAL_INT_PLUS_NANO:
- result = (s64)val * (s64)scaleint +
- div_s64((s64)val * (s64)scalepart, 1000000000LL);
- break;
- default:
- return -EINVAL;
- }
- return sprintf(buf, "%ld\n", result);
+ return sprintf(buf, "%d\n", result);
}
static void iio_hwmon_free_attrs(struct iio_hwmon_state *st)
diff --git a/drivers/staging/iio/trigger/iio-trig-bfin-timer.c b/drivers/staging/iio/trigger/iio-trig-bfin-timer.c
index ce6a7b1b8860..52062d786f84 100644
--- a/drivers/staging/iio/trigger/iio-trig-bfin-timer.c
+++ b/drivers/staging/iio/trigger/iio-trig-bfin-timer.c
@@ -14,14 +14,18 @@
#include <linux/delay.h>
#include <asm/gptimers.h>
+#include <asm/portmux.h>
#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
+#include "iio-trig-bfin-timer.h"
+
struct bfin_timer {
unsigned short id, bit;
unsigned long irqbit;
int irq;
+ int pin;
};
/*
@@ -30,22 +34,22 @@ struct bfin_timer {
*/
static struct bfin_timer iio_bfin_timer_code[MAX_BLACKFIN_GPTIMERS] = {
- {TIMER0_id, TIMER0bit, TIMER_STATUS_TIMIL0, IRQ_TIMER0},
- {TIMER1_id, TIMER1bit, TIMER_STATUS_TIMIL1, IRQ_TIMER1},
- {TIMER2_id, TIMER2bit, TIMER_STATUS_TIMIL2, IRQ_TIMER2},
+ {TIMER0_id, TIMER0bit, TIMER_STATUS_TIMIL0, IRQ_TIMER0, P_TMR0},
+ {TIMER1_id, TIMER1bit, TIMER_STATUS_TIMIL1, IRQ_TIMER1, P_TMR1},
+ {TIMER2_id, TIMER2bit, TIMER_STATUS_TIMIL2, IRQ_TIMER2, P_TMR2},
#if (MAX_BLACKFIN_GPTIMERS > 3)
- {TIMER3_id, TIMER3bit, TIMER_STATUS_TIMIL3, IRQ_TIMER3},
- {TIMER4_id, TIMER4bit, TIMER_STATUS_TIMIL4, IRQ_TIMER4},
- {TIMER5_id, TIMER5bit, TIMER_STATUS_TIMIL5, IRQ_TIMER5},
- {TIMER6_id, TIMER6bit, TIMER_STATUS_TIMIL6, IRQ_TIMER6},
- {TIMER7_id, TIMER7bit, TIMER_STATUS_TIMIL7, IRQ_TIMER7},
+ {TIMER3_id, TIMER3bit, TIMER_STATUS_TIMIL3, IRQ_TIMER3, P_TMR3},
+ {TIMER4_id, TIMER4bit, TIMER_STATUS_TIMIL4, IRQ_TIMER4, P_TMR4},
+ {TIMER5_id, TIMER5bit, TIMER_STATUS_TIMIL5, IRQ_TIMER5, P_TMR5},
+ {TIMER6_id, TIMER6bit, TIMER_STATUS_TIMIL6, IRQ_TIMER6, P_TMR6},
+ {TIMER7_id, TIMER7bit, TIMER_STATUS_TIMIL7, IRQ_TIMER7, P_TMR7},
#endif
#if (MAX_BLACKFIN_GPTIMERS > 8)
- {TIMER8_id, TIMER8bit, TIMER_STATUS_TIMIL8, IRQ_TIMER8},
- {TIMER9_id, TIMER9bit, TIMER_STATUS_TIMIL9, IRQ_TIMER9},
- {TIMER10_id, TIMER10bit, TIMER_STATUS_TIMIL10, IRQ_TIMER10},
+ {TIMER8_id, TIMER8bit, TIMER_STATUS_TIMIL8, IRQ_TIMER8, P_TMR8},
+ {TIMER9_id, TIMER9bit, TIMER_STATUS_TIMIL9, IRQ_TIMER9, P_TMR9},
+ {TIMER10_id, TIMER10bit, TIMER_STATUS_TIMIL10, IRQ_TIMER10, P_TMR10},
#if (MAX_BLACKFIN_GPTIMERS > 11)
- {TIMER11_id, TIMER11bit, TIMER_STATUS_TIMIL11, IRQ_TIMER11},
+ {TIMER11_id, TIMER11bit, TIMER_STATUS_TIMIL11, IRQ_TIMER11, P_TMR11},
#endif
#endif
};
@@ -54,15 +58,33 @@ struct bfin_tmr_state {
struct iio_trigger *trig;
struct bfin_timer *t;
unsigned timer_num;
+ bool output_enable;
+ unsigned int duty;
int irq;
};
+static int iio_bfin_tmr_set_state(struct iio_trigger *trig, bool state)
+{
+ struct bfin_tmr_state *st = trig->private_data;
+
+ if (get_gptimer_period(st->t->id) == 0)
+ return -EINVAL;
+
+ if (state)
+ enable_gptimers(st->t->bit);
+ else
+ disable_gptimers(st->t->bit);
+
+ return 0;
+}
+
static ssize_t iio_bfin_tmr_frequency_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct iio_trigger *trig = to_iio_trigger(dev);
struct bfin_tmr_state *st = trig->private_data;
- long val;
+ unsigned long val;
+ bool enabled;
int ret;
ret = strict_strtoul(buf, 10, &val);
@@ -74,20 +96,25 @@ static ssize_t iio_bfin_tmr_frequency_store(struct device *dev,
goto error_ret;
}
- disable_gptimers(st->t->bit);
+ enabled = get_enabled_gptimers() & st->t->bit;
+
+ if (enabled)
+ disable_gptimers(st->t->bit);
if (!val)
goto error_ret;
val = get_sclk() / val;
- if (val <= 4) {
+ if (val <= 4 || val <= st->duty) {
ret = -EINVAL;
goto error_ret;
}
set_gptimer_period(st->t->id, val);
- set_gptimer_pwidth(st->t->id, 1);
- enable_gptimers(st->t->bit);
+ set_gptimer_pwidth(st->t->id, val - st->duty);
+
+ if (enabled)
+ enable_gptimers(st->t->bit);
error_ret:
return ret ? ret : count;
@@ -99,9 +126,15 @@ static ssize_t iio_bfin_tmr_frequency_show(struct device *dev,
{
struct iio_trigger *trig = to_iio_trigger(dev);
struct bfin_tmr_state *st = trig->private_data;
+ unsigned int period = get_gptimer_period(st->t->id);
+ unsigned long val;
+
+ if (period == 0)
+ val = 0;
+ else
+ val = get_sclk() / get_gptimer_period(st->t->id);
- return sprintf(buf, "%lu\n",
- get_sclk() / get_gptimer_period(st->t->id));
+ return sprintf(buf, "%lu\n", val);
}
static DEVICE_ATTR(frequency, S_IRUGO | S_IWUSR, iio_bfin_tmr_frequency_show,
@@ -121,7 +154,6 @@ static const struct attribute_group *iio_bfin_tmr_trigger_attr_groups[] = {
NULL
};
-
static irqreturn_t iio_bfin_tmr_trigger_isr(int irq, void *devid)
{
struct bfin_tmr_state *st = devid;
@@ -145,11 +177,14 @@ static int iio_bfin_tmr_get_number(int irq)
static const struct iio_trigger_ops iio_bfin_tmr_trigger_ops = {
.owner = THIS_MODULE,
+ .set_trigger_state = iio_bfin_tmr_set_state,
};
static int __devinit iio_bfin_tmr_trigger_probe(struct platform_device *pdev)
{
+ struct iio_bfin_timer_trigger_pdata *pdata = pdev->dev.platform_data;
struct bfin_tmr_state *st;
+ unsigned int config;
int ret;
st = kzalloc(sizeof(*st), GFP_KERNEL);
@@ -193,13 +228,43 @@ static int __devinit iio_bfin_tmr_trigger_probe(struct platform_device *pdev)
goto out4;
}
- set_gptimer_config(st->t->id, OUT_DIS | PWM_OUT | PERIOD_CNT | IRQ_ENA);
+ config = PWM_OUT | PERIOD_CNT | IRQ_ENA;
+
+ if (pdata && pdata->output_enable) {
+ unsigned long long val;
+
+ st->output_enable = true;
+
+ ret = peripheral_request(st->t->pin, st->trig->name);
+ if (ret)
+ goto out_free_irq;
+
+ val = (unsigned long long)get_sclk() * pdata->duty_ns;
+ do_div(val, NSEC_PER_SEC);
+ st->duty = val;
+
+ /**
+ * The interrupt will be generated at the end of the period,
+ * since we want the interrupt to be generated at end of the
+ * pulse we invert both polarity and duty cycle, so that the
+ * pulse will be generated directly before the interrupt.
+ */
+ if (pdata->active_low)
+ config |= PULSE_HI;
+ } else {
+ st->duty = 1;
+ config |= OUT_DIS;
+ }
+
+ set_gptimer_config(st->t->id, config);
dev_info(&pdev->dev, "iio trigger Blackfin TMR%d, IRQ-%d",
st->timer_num, st->irq);
platform_set_drvdata(pdev, st);
return 0;
+out_free_irq:
+ free_irq(st->irq, st);
out4:
iio_trigger_unregister(st->trig);
out2:
@@ -215,6 +280,8 @@ static int __devexit iio_bfin_tmr_trigger_remove(struct platform_device *pdev)
struct bfin_tmr_state *st = platform_get_drvdata(pdev);
disable_gptimers(st->t->bit);
+ if (st->output_enable)
+ peripheral_free(st->t->pin);
free_irq(st->irq, st);
iio_trigger_unregister(st->trig);
iio_trigger_put(st->trig);
diff --git a/drivers/staging/iio/trigger/iio-trig-bfin-timer.h b/drivers/staging/iio/trigger/iio-trig-bfin-timer.h
new file mode 100644
index 000000000000..c07321f8d94c
--- /dev/null
+++ b/drivers/staging/iio/trigger/iio-trig-bfin-timer.h
@@ -0,0 +1,24 @@
+#ifndef __IIO_BFIN_TIMER_TRIGGER_H__
+#define __IIO_BFIN_TIMER_TRIGGER_H__
+
+/**
+ * struct iio_bfin_timer_trigger_pdata - timer trigger platform data
+ * @output_enable: Enable external trigger pulse generation.
+ * @active_low: Whether the trigger pulse is active low.
+ * @duty_ns: Length of the trigger pulse in nanoseconds.
+ *
+ * This struct is used to configure the output pulse generation of the blackfin
+ * timer trigger. If output_enable is set to true an external trigger signal
+ * will generated on the pin corresponding to the timer. This is useful for
+ * converters which needs an external signal to start conversion. active_low and
+ * duty_ns are used to configure the type of the trigger pulse. If output_enable
+ * is set to false no external trigger pulse will be generated and active_low
+ * and duty_ns are ignored.
+ **/
+struct iio_bfin_timer_trigger_pdata {
+ bool output_enable;
+ bool active_low;
+ unsigned int duty_ns;
+};
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-03 18:50:59 +0100