Merge tag 'iio-for-5.3b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Second set of IIO device support, features, cleanups and minor fixes for 5.3.

A few bits for the counters subsystem mixed in here as well.
There are some late breaking fixes as well, which aren't so urgent
they can't wait for the merge window.

New Device Support
* adf4371
  - New driver + bindings.
  - Support the adf4372 PLL. Mostly ID and bindings.
* ad8366 (note includes rework of driver needed to allow support for these).
  - Support the ADL5240 variable gain amplifier (VGA).
  - Support the ADA4961 digital gain amplifier (DGA).
* dps310
  - New driver, in several parts from different authors for this temp
    and pressure sensor.
  - Includes errata workaround for a temperature reading issue.
* stk3310
  - Support the stk3335, mostly ID.

Features and cleanups
* core
  - drop error handling on debugfs registration.
  - harden by making sure we don't overrun iio_chan_info_postfix.
* docs
  - convert remaining docs to rst. At somepoint we'll fit these few
    into the main IIO docs.
  - improve sampling_frequency_available docs but explaining the
    range form.
* ad_sigma_delta
  - Drop a pointless goto.
* ad2s1210
  - Drop pointless platform data null check seeing as we don't actually
    use platform data anymore.
* ad7124
  - Relax limitation on channel numbers to allow pseudo different channels.
  - Support control of whether the input is buffered via DT.
  - Use dynamic allocation for channel configuration to make it easier
    to support new devices.
  - YAML binding conversion.
* ad7150
  - Comment tidy up.
  - Consistent and simple if (ret) handling of i2c errors.
  - FIELD_GET and GENMASK.
  - Ternary rather than !!(condition) for readability.
  - Use macros to avoid repetition of channel definitions.
* ad7606
  - Add software channel config (rather that pin controlled)
  - Refactor to simplify addition of new part in future.
* ad7746
  - of_deivce_id table.
* ad7780
  - MAINTAINERS entry
  - YAML DT bindings.
* ad8366
  - Stop using core mlock in favour of well scoped local lock.
  - SPDX + copyright date update.
* ad9834
  - of_device_id table
* adf4371
  - Add support for output stage muting before lock on has occured.
* adis library
  - MAINTAINERS entry to reflect that this now Alexandru's problem ;)
* adis162xx:
  - Fix a slightly incorrect set of comments and print statements on
    minimum supported voltage.
* adis16203
  - of_device_id table.
* adis16240
  - Add of_device_id table (in two parts as first patch only used it for
    MODULE_DEVICE_TABLE.)
* adt7316-spi
  - of_device_id table
* adxl372
  - YAML DT binding conversion.
  - Cleanup use of buffer callback functions (precursor to core rework).
* bh1710
  - Simplify getting the i2c adapter from the client.
* dht11
  - Mote to newer GPIO consumer interface.
* kxcjk-1013.c
  - Add binding for sensor in display of some ultrabooks after userspace
    tools updated for it not be a problem to report two similar sensors.
* imx7d
  - drop unused variables.
  - white space
  - define instead of variable for clock frequency that is fixed.
  - drop pointless error message.
* messon_saradc
  - SPDX
* sps30
  - MAINTAINERS entry
  - YAML binding conversion.
* st_accel
  - Tidy up ordering in various buffer related callbacks. This is
    part of a long running effort to simplify the core code.
* stm32-dfsdm:
  - Manage the resolution cleanly in triggerd modes.
  - Add fast mode support which allows more flexible filter choices.
  - Add a comment on the reason for a 16 bit record when technically
    not 'required'.
* st_lsm6dsx
  - Embed device name in the sensor_settings struct as i3c doesn't
    have a convenient name field to use for this.
* xilinx-adc
  - Relax constraints on supported platforms to reflect that this
    can used with FPGAs on PCIe cards and hence many architectures.
* counters/ftm-quaddec
  - Fix some formatting io MODULE_AUTHOR
  - MAINTAINERS entry

Fixes
* tools
  - fix incorrect handling of 32 bit channels.
* sca3000
  - Potential endian bug that is unlikely to bite anyone (be64 host
    seems unlikely for this old part).
* stm32-adc
  - Add vdda-supply. On some boards it needs to be turned on to supply
    the ADC.  DT bindings included.
* stm32-dfsdm
  - Fix output resolution to work with filter orders other than 3.
  - Fix output datatype as it's signed and previously claimed not to be.

* tag 'iio-for-5.3b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (68 commits)
  iio: iio-utils: Fix possible incorrect mask calculation
  iio: frequency: adf4371: Add support for output stage mute
  dt-bindings: iio: frequency: Add ADF4372 PLL documentation
  iio: frequency: adf4371: Add support for ADF4372 PLL
  dt-bindings: iio: adc: Add buffered input property
  Convert AD7124 bindings documentation to YAML format.
  iio: adc: ad7124: Shift to dynamic allocation for channel configuration
  iio: adc: ad7124: Add buffered input support
  iio: adc: ad7124: Remove input number limitation
  MAINTAINERS: add ADIS IMU driver library entry
  iio: adis162xx: fix low-power docs & reports
  counter/ftm-quaddec: Add missing '>' in MODULE_AUTHOR
  iio: core: no need to check return value of debugfs_create functions
  docs: iio: convert to ReST
  iio: adc: stm32-adc: add missing vdda-supply
  dt-bindings: iio: adc: stm32: add missing vdda supply
  iio: adc: stm32-dfsdm: add comment for 16 bits record
  iio: adc: stm32-dfsdm: add fast mode support
  iio: adc: stm32-dfsdm: manage data resolution in trigger mode
  iio: adc: stm32-dfsdm: fix data type
  ...

7 files changed, 74 insertions, 42 deletions

diff --git a/drivers/staging/iio/accel/adis16203.c b/drivers/staging/iio/accel/adis16203.c
index 70381756a64a..39687139a7d3 100644
--- a/drivers/staging/iio/accel/adis16203.c
+++ b/drivers/staging/iio/accel/adis16203.c
@@ -122,7 +122,7 @@
 /* Power supply above 3.625 V */
 #define ADIS16203_DIAG_STAT_POWER_HIGH_BIT    1
 
-/* Power supply below 3.15 V */
+/* Power supply below 2.975 V */
 #define ADIS16203_DIAG_STAT_POWER_LOW_BIT     0
 
 /* GLOB_CMD */
@@ -234,7 +234,7 @@ static const char * const adis16203_status_error_msgs[] = {
 	[ADIS16203_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
 	[ADIS16203_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
 	[ADIS16203_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
-	[ADIS16203_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
+	[ADIS16203_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.975V",
 };
 
 static const struct adis_data adis16203_data = {
@@ -311,9 +311,17 @@ static int adis16203_remove(struct spi_device *spi)
 	return 0;
 }
 
+static const struct of_device_id adis16203_of_match[] = {
+	{ .compatible = "adi,adis16203" },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, adis16203_of_match);
+
 static struct spi_driver adis16203_driver = {
 	.driver = {
 		.name = "adis16203",
+		.of_match_table = adis16203_of_match,
 	},
 	.probe = adis16203_probe,
 	.remove = adis16203_remove,
diff --git a/drivers/staging/iio/accel/adis16240.c b/drivers/staging/iio/accel/adis16240.c
index b80e0d248b0f..62f4b3b1b457 100644
--- a/drivers/staging/iio/accel/adis16240.c
+++ b/drivers/staging/iio/accel/adis16240.c
@@ -175,7 +175,7 @@
 /* Power supply above 3.625 V */
 #define ADIS16240_DIAG_STAT_POWER_HIGH_BIT	1
 
- /* Power supply below 3.15 V */
+ /* Power supply below 2.225 V */
 #define ADIS16240_DIAG_STAT_POWER_LOW_BIT	0
 
 /* GLOB_CMD */
@@ -435,9 +435,16 @@ static int adis16240_remove(struct spi_device *spi)
 	return 0;
 }
 
+static const struct of_device_id adis16240_of_match[] = {
+	{ .compatible = "adi,adis16240" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, adis16240_of_match);
+
 static struct spi_driver adis16240_driver = {
 	.driver = {
 		.name = "adis16240",
+		.of_match_table = adis16240_of_match,
 	},
 	.probe = adis16240_probe,
 	.remove = adis16240_remove,
diff --git a/drivers/staging/iio/addac/adt7316-spi.c b/drivers/staging/iio/addac/adt7316-spi.c
index 2066241b15b1..af513e003da7 100644
--- a/drivers/staging/iio/addac/adt7316-spi.c
+++ b/drivers/staging/iio/addac/adt7316-spi.c
@@ -126,9 +126,22 @@ static const struct spi_device_id adt7316_spi_id[] = {
 
 MODULE_DEVICE_TABLE(spi, adt7316_spi_id);
 
+static const struct of_device_id adt7316_of_spi_match[] = {
+	{ .compatible = "adi,adt7316" },
+	{ .compatible = "adi,adt7317" },
+	{ .compatible = "adi,adt7318" },
+	{ .compatible = "adi,adt7516" },
+	{ .compatible = "adi,adt7517" },
+	{ .compatible = "adi,adt7519" },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, adt7316_of_spi_match);
+
 static struct spi_driver adt7316_driver = {
 	.driver = {
 		.name = "adt7316",
+		.of_match_table = adt7316_of_spi_match,
 		.pm = ADT7316_PM_OPS,
 	},
 	.probe = adt7316_spi_probe,
diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/staging/iio/cdc/ad7150.c
index e075244c602b..f4954d85553e 100644
--- a/drivers/staging/iio/cdc/ad7150.c
+++ b/drivers/staging/iio/cdc/ad7150.c
@@ -46,6 +46,9 @@
 #define AD7150_SN0                 22
 #define AD7150_ID                  23
 
+/* AD7150 masks */
+#define AD7150_THRESHTYPE_MSK			GENMASK(6, 5)
+
 /**
  * struct ad7150_chip_info - instance specific chip data
  * @client: i2c client for this device
@@ -138,7 +141,7 @@ static int ad7150_read_event_config(struct iio_dev *indio_dev,
 	if (ret < 0)
 		return ret;
 
-	threshtype = (ret >> 5) & 0x03;
+	threshtype = FIELD_GET(AD7150_THRESHTYPE_MSK, ret);
 
 	/*check if threshold mode is fixed or adaptive*/
 	thrfixed = FIELD_GET(AD7150_CFG_FIX, ret);
@@ -162,7 +165,8 @@ static int ad7150_read_event_config(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
-/* lock should be held */
+/* state_lock should be held to ensure consistent state*/
+
 static int ad7150_write_event_params(struct iio_dev *indio_dev,
 				     unsigned int chan,
 				     enum iio_event_type type,
@@ -201,16 +205,11 @@ static int ad7150_write_event_params(struct iio_dev *indio_dev,
 	ret = i2c_smbus_write_byte_data(chip->client,
 					ad7150_addresses[chan][4],
 					sens);
-	if (ret < 0)
+	if (ret)
 		return ret;
-
-	ret = i2c_smbus_write_byte_data(chip->client,
+	return i2c_smbus_write_byte_data(chip->client,
 					ad7150_addresses[chan][5],
 					timeout);
-	if (ret < 0)
-		return ret;
-
-	return 0;
 }
 
 static int ad7150_write_event_config(struct iio_dev *indio_dev,
@@ -353,8 +352,8 @@ static ssize_t ad7150_show_timeout(struct device *dev,
 
 	/* use the event code for consistency reasons */
 	int chan = IIO_EVENT_CODE_EXTRACT_CHAN(this_attr->address);
-	int rising = !!(IIO_EVENT_CODE_EXTRACT_DIR(this_attr->address)
-			== IIO_EV_DIR_RISING);
+	int rising = (IIO_EVENT_CODE_EXTRACT_DIR(this_attr->address)
+		      == IIO_EV_DIR_RISING) ? 1 : 0;
 
 	switch (IIO_EVENT_CODE_EXTRACT_TYPE(this_attr->address)) {
 	case IIO_EV_TYPE_MAG_ADAPTIVE:
@@ -468,30 +467,21 @@ static const struct iio_event_spec ad7150_events[] = {
 	},
 };
 
+#define AD7150_CAPACITANCE_CHAN(_chan)	{			\
+		.type = IIO_CAPACITANCE,			\
+		.indexed = 1,					\
+		.channel = _chan,				\
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |	\
+		BIT(IIO_CHAN_INFO_AVERAGE_RAW),			\
+		.event_spec = ad7150_events,			\
+		.num_event_specs = ARRAY_SIZE(ad7150_events),	\
+	}
+
 static const struct iio_chan_spec ad7150_channels[] = {
-	{
-		.type = IIO_CAPACITANCE,
-		.indexed = 1,
-		.channel = 0,
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
-		BIT(IIO_CHAN_INFO_AVERAGE_RAW),
-		.event_spec = ad7150_events,
-		.num_event_specs = ARRAY_SIZE(ad7150_events),
-	}, {
-		.type = IIO_CAPACITANCE,
-		.indexed = 1,
-		.channel = 1,
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
-		BIT(IIO_CHAN_INFO_AVERAGE_RAW),
-		.event_spec = ad7150_events,
-		.num_event_specs = ARRAY_SIZE(ad7150_events),
-	},
+	AD7150_CAPACITANCE_CHAN(0),
+	AD7150_CAPACITANCE_CHAN(1)
 };
 
-/*
- * threshold events
- */
-
 static irqreturn_t ad7150_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
@@ -580,10 +570,6 @@ static const struct iio_info ad7150_info = {
 	.write_event_value = &ad7150_write_event_value,
 };
 
-/*
- * device probe and remove
- */
-
 static int ad7150_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
index 47610d863908..21527d84f940 100644
--- a/drivers/staging/iio/cdc/ad7746.c
+++ b/drivers/staging/iio/cdc/ad7746.c
@@ -748,9 +748,19 @@ static const struct i2c_device_id ad7746_id[] = {
 
 MODULE_DEVICE_TABLE(i2c, ad7746_id);
 
+static const struct of_device_id ad7746_of_match[] = {
+	{ .compatible = "adi,ad7745" },
+	{ .compatible = "adi,ad7746" },
+	{ .compatible = "adi,ad7747" },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, ad7746_of_match);
+
 static struct i2c_driver ad7746_driver = {
 	.driver = {
 		.name = KBUILD_MODNAME,
+		.of_match_table = ad7746_of_match,
 	},
 	.probe = ad7746_probe,
 	.id_table = ad7746_id,
diff --git a/drivers/staging/iio/frequency/ad9834.c b/drivers/staging/iio/frequency/ad9834.c
index 6de3cd7363d7..038d6732c3fd 100644
--- a/drivers/staging/iio/frequency/ad9834.c
+++ b/drivers/staging/iio/frequency/ad9834.c
@@ -521,9 +521,20 @@ static const struct spi_device_id ad9834_id[] = {
 };
 MODULE_DEVICE_TABLE(spi, ad9834_id);
 
+static const struct of_device_id ad9834_of_match[] = {
+	{.compatible = "adi,ad9833"},
+	{.compatible = "adi,ad9834"},
+	{.compatible = "adi,ad9837"},
+	{.compatible = "adi,ad9838"},
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, ad9834_of_match);
+
 static struct spi_driver ad9834_driver = {
 	.driver = {
 		.name	= "ad9834",
+		.of_match_table = ad9834_of_match
 	},
 	.probe		= ad9834_probe,
 	.remove		= ad9834_remove,
diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index b6be0bc202f5..0c1bd108c386 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -647,9 +647,6 @@ static int ad2s1210_probe(struct spi_device *spi)
 	struct ad2s1210_state *st;
 	int ret;
 
-	if (!spi->dev.platform_data)
-		return -EINVAL;
-
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
 	if (!indio_dev)
 		return -ENOMEM;