Merge tag 'iio-for-4.1a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

First set of new drivers, cleanups and functionality for IIO in the 4.1 cycle.

New drivers
* CM3323 color sensor.
* MS5611 pressure and temperature sensor.

New functionality
* mup6050 - create mux clients for devices described via ACPI. The reasoning
     and approach taken in this patch are complex.  Basically there is no
     otherway of finding out what is there than by some esoteric look ups in
     the ACPI data.
* cm3232 - PM support
* itg3200 - suspend/resume support
* mcp320x - add more ADCs to the kconfig to reflect what the driver supports
     (this patch and the bindings got left behind when the support was added
      a while back).

Docs / utils
* ti-adc128s052 - DT bindings.
* mcp3422 - DT bindings.
* mcp320x - DT bindings
* ABI docs for event threshold scale attributes, in_magn_offset, proximity
  scan_element and thresh falling/rising values for accelerometers.  All
  elements long in use that have slipped by being explicitly documented.
* Tidy up the tools previously in drivers/staging/iio/Documentation and move
  them out to /tools/iio. Yet another move that should have happened long ago.
  This time Roberta Dobrescu did the leg work.  Thanks!

Core Cleanups
* Export userspace IIO headers.  We should have done the appropriate header
  splitting a long time ago. Thanks to Daniel for sorting this out.

* Refactor the registring of attributes for buffers to move all non-custom
  ones to a vector allowing easier additions to the current set in the future.

Driver Cleanups
* gpiod related cleanups.  Make use of the additional parameter to specify
  	initial direciton to avoid extra code.
* bmc150 - Various refactorings to reduce code repitition and prepare for
           hardware buffer support.  Some of these cleanups are good even
	   without the new functionality.
* kmx61 - direct use of index to an array avoiding a structure element which
          was always the index to an element in an array of that structure.
* vf610 - avoid incorrect type for return from wait_for_completion_timeout.
* gp2ap020a00f - use put_unaligned_le32 for slight code simplification.
* ade7754 - improve error handling including suppressing some build warnings.
* ade7759 - improve error handling including suppressing some build warnings.
* hmc5843 - Long line and indentation fixes. Also some constifying of various
      constant data.
* ade7854 - 80+ character line splitting.
* ad2s1210 - fix wrong printf format string.
* mxs-lradc - fix wrong printf format string.
* ade7954-i2c - code alignment fixes and other trivial but worthwhile bits.
* periodic rtc trigger - make the frequency type an unsigned int as it
  is always treated as such.
* jsa1212 - constify struct regmap_config as it is constant.
* ad7793 - typo in the MODULE_DESCRIPTION
* mma9551 - check gpiod_to_irq errors.  Note that this doesn't actually cause
    any trouble but is worth tidying up as obviously incorrect.
* mlx90614 - refactor the register symbols to make it clear which reads are to
    RAM not PROM.

1 files changed, 286 insertions, 0 deletions

diff --git a/drivers/iio/light/cm3323.c b/drivers/iio/light/cm3323.c
new file mode 100644
index 0000000..869033e
--- /dev/null
+++ b/drivers/iio/light/cm3323.c
@@ -0,0 +1,286 @@
+/*
+ * CM3323 - Capella Color Light Sensor
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License.  See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for CM3323 (7-bit I2C slave address 0x10)
+ *
+ * TODO: calibscale to correct the lens factor
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define CM3323_DRV_NAME "cm3323"
+
+#define CM3323_CMD_CONF		0x00
+#define CM3323_CMD_RED_DATA	0x08
+#define CM3323_CMD_GREEN_DATA	0x09
+#define CM3323_CMD_BLUE_DATA	0x0A
+#define CM3323_CMD_CLEAR_DATA	0x0B
+
+#define CM3323_CONF_SD_BIT	BIT(0) /* sensor disable */
+#define CM3323_CONF_AF_BIT	BIT(1) /* auto/manual force mode */
+#define CM3323_CONF_IT_MASK	(BIT(4) | BIT(5) | BIT(6))
+#define CM3323_CONF_IT_SHIFT	4
+
+#define CM3323_INT_TIME_AVAILABLE "0.04 0.08 0.16 0.32 0.64 1.28"
+
+static const struct {
+	int val;
+	int val2;
+} cm3323_int_time[] = {
+	{0, 40000},  /* 40 ms */
+	{0, 80000},  /* 80 ms */
+	{0, 160000}, /* 160 ms */
+	{0, 320000}, /* 320 ms */
+	{0, 640000}, /* 640 ms */
+	{1, 280000}, /* 1280 ms */
+};
+
+struct cm3323_data {
+	struct i2c_client *client;
+	u16 reg_conf;
+	struct mutex mutex;
+};
+
+#define CM3323_COLOR_CHANNEL(_color, _addr) { \
+	.type = IIO_INTENSITY, \
+	.modified = 1, \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+	.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME), \
+	.channel2 = IIO_MOD_LIGHT_##_color, \
+	.address = _addr, \
+}
+
+static const struct iio_chan_spec cm3323_channels[] = {
+	CM3323_COLOR_CHANNEL(RED, CM3323_CMD_RED_DATA),
+	CM3323_COLOR_CHANNEL(GREEN, CM3323_CMD_GREEN_DATA),
+	CM3323_COLOR_CHANNEL(BLUE, CM3323_CMD_BLUE_DATA),
+	CM3323_COLOR_CHANNEL(CLEAR, CM3323_CMD_CLEAR_DATA),
+};
+
+static IIO_CONST_ATTR_INT_TIME_AVAIL(CM3323_INT_TIME_AVAILABLE);
+
+static struct attribute *cm3323_attributes[] = {
+	&iio_const_attr_integration_time_available.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group cm3323_attribute_group = {
+	.attrs = cm3323_attributes,
+};
+
+static int cm3323_init(struct iio_dev *indio_dev)
+{
+	int ret;
+	struct cm3323_data *data = iio_priv(indio_dev);
+
+	ret = i2c_smbus_read_word_data(data->client, CM3323_CMD_CONF);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_conf\n");
+		return ret;
+	}
+
+	/* enable sensor and set auto force mode */
+	ret &= ~(CM3323_CONF_SD_BIT | CM3323_CONF_AF_BIT);
+
+	ret = i2c_smbus_write_word_data(data->client, CM3323_CMD_CONF, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_conf\n");
+		return ret;
+	}
+
+	data->reg_conf = ret;
+
+	return 0;
+}
+
+static void cm3323_disable(struct iio_dev *indio_dev)
+{
+	int ret;
+	struct cm3323_data *data = iio_priv(indio_dev);
+
+	ret = i2c_smbus_write_word_data(data->client, CM3323_CMD_CONF,
+					CM3323_CONF_SD_BIT);
+	if (ret < 0)
+		dev_err(&data->client->dev, "Error writing reg_conf\n");
+}
+
+static int cm3323_set_it_bits(struct cm3323_data *data, int val, int val2)
+{
+	int i, ret;
+	u16 reg_conf;
+
+	for (i = 0; i < ARRAY_SIZE(cm3323_int_time); i++) {
+		if (val == cm3323_int_time[i].val &&
+		    val2 == cm3323_int_time[i].val2) {
+			reg_conf = data->reg_conf;
+			reg_conf |= i << CM3323_CONF_IT_SHIFT;
+
+			ret = i2c_smbus_write_word_data(data->client,
+							CM3323_CMD_CONF,
+							reg_conf);
+			if (ret < 0)
+				return ret;
+
+			data->reg_conf = reg_conf;
+			return 0;
+		}
+	}
+	return -EINVAL;
+}
+
+static int cm3323_get_it_bits(struct cm3323_data *data)
+{
+	int bits;
+
+	bits = (data->reg_conf & CM3323_CONF_IT_MASK) >>
+		CM3323_CONF_IT_SHIFT;
+
+	if (bits >= ARRAY_SIZE(cm3323_int_time))
+		return -EINVAL;
+	return bits;
+}
+
+static int cm3323_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan, int *val,
+			   int *val2, long mask)
+{
+	int i, ret;
+	struct cm3323_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		mutex_lock(&data->mutex);
+		ret = i2c_smbus_read_word_data(data->client, chan->address);
+		if (ret < 0) {
+			mutex_unlock(&data->mutex);
+			return ret;
+		}
+		*val = ret;
+		mutex_unlock(&data->mutex);
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_INT_TIME:
+		mutex_lock(&data->mutex);
+		i = cm3323_get_it_bits(data);
+		if (i < 0) {
+			mutex_unlock(&data->mutex);
+			return -EINVAL;
+		}
+
+		*val = cm3323_int_time[i].val;
+		*val2 = cm3323_int_time[i].val2;
+		mutex_unlock(&data->mutex);
+
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int cm3323_write_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan, int val,
+			    int val2, long mask)
+{
+	struct cm3323_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_INT_TIME:
+		mutex_lock(&data->mutex);
+		ret = cm3323_set_it_bits(data, val, val2);
+		mutex_unlock(&data->mutex);
+
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_info cm3323_info = {
+	.driver_module	= THIS_MODULE,
+	.read_raw	= cm3323_read_raw,
+	.write_raw	= cm3323_write_raw,
+	.attrs		= &cm3323_attribute_group,
+};
+
+static int cm3323_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	struct cm3323_data *data;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+	data->client = client;
+
+	mutex_init(&data->mutex);
+
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &cm3323_info;
+	indio_dev->name = CM3323_DRV_NAME;
+	indio_dev->channels = cm3323_channels;
+	indio_dev->num_channels = ARRAY_SIZE(cm3323_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = cm3323_init(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "cm3323 chip init failed\n");
+		return ret;
+	}
+	ret = iio_device_register(indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "failed to register iio dev\n");
+		goto err_init;
+	}
+	return 0;
+err_init:
+	cm3323_disable(indio_dev);
+	return ret;
+}
+
+static int cm3323_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+	iio_device_unregister(indio_dev);
+	cm3323_disable(indio_dev);
+
+	return 0;
+}
+
+static const struct i2c_device_id cm3323_id[] = {
+	{"cm3323", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, cm3323_id);
+
+static struct i2c_driver cm3323_driver = {
+	.driver = {
+		.name = CM3323_DRV_NAME,
+	},
+	.probe		= cm3323_probe,
+	.remove		= cm3323_remove,
+	.id_table	= cm3323_id,
+};
+
+module_i2c_driver(cm3323_driver);
+
+MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
+MODULE_DESCRIPTION("Capella CM3323 Color Light Sensor driver");
+MODULE_LICENSE("GPL v2");