Merge tag 'iio-for-5.20a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Jonathan writes:

IIO new device support, features and minor fixes for 5.20

Several on-running cleanup efforts dominate this time, plus the DMA
safety alignment issue identified due to improved understanding of
the restrictions as a result of Catalin Marinas' efforts in that area.

One immutable branch in here due to MFD and SPMI elements needed for
the qcom-rradc driver.

Device support
* bmi088
  - Add support for bmi085 (accelerometer part of IMU)
  - Add support for bmi090l (accelerometer part of IMU)
* mcp4922
  - Add support for single channel device MCP4921
* rzg2l-adc
  - Add compatible and minor tweaks to support RZ/G2UL ADC
* sca3300
  - Add support for scl3300 including refactoring driver to support
    multiple device types and cleanup noticed whilst working on driver.
* spmi-rradc
  - New driver for Qualcomm SPMI Round Robin ADC including necessary
    additional utility functions in SPMI core and related MFD driver.
* ti-dac55781
  - Add compatible for DAC121C081 which is very similar to existing parts.

Features
* core
  - Warn on iio_trigger_get() on an unregistered IIO trigger.
* bma400
  - Triggered buffer support
  - Activity and step counting
  - Misc driver improvements such as devm and header ordering
* cm32181
  - Add PM support.
* cros_ec
  - Sensor location support
* sx9324
  - Add precharge resistor setting
  - Add internal compensation resistor setting
  - Add CS idle/sleep mode.
* sx9360
  - Add precharge resistor setting
* vl53l0x
  - Handle reset GPIO, regulator and relax handling of irq type.

Cleanup and minor fixes:

Treewide changes
- Cleanup of error handling in remove functions in many drivers.
- Update dt-binding maintainers for a number of ADI bindings.
- Several sets of conversion of drivers from device tree specific to
  generic device properties. Includes fixing up various related
  header and Kconfig issues.
- Drop include of of.h from iio.h and fix up drivers that need to include
  it directly.
- More moves of clusters of drivers into appropriate IIO_XXX namespaces.
- Tree wide fix of a long running bug around DMA safety requirements.
  IIO was using __cacheline_aligned to pad iio_priv() structures. This
  worked for a long time by coincidence, but correct alignment is
  ARCH_KMALLOC_MINALIGN.  As there is activity around this area, introduce
  an IIO local IIO_DMA_MINALIGN to allow for changing it in one place rather
  than every driver in future. Note, there have been no reports of this
  bug in the wild, and it may not happen on any platforms supported by
  upstream, so no rush to backport these fixes.

Other cleanup
* core
  - Switch to ida_alloc()/free()
  - Drop unused iio_get_time_res()
  - Octal permissions and DEVICE_ATTR_* macros.
  - Cleanup bared unsigned usage.
* MAINTAINERS
  - Add include/dt-bindings/iio/ to the main IIO entry.
* ad5380
  - Comment syntax fix.
* ad74413r
  - Call to for_each_set_bit_from(), with from value as 0 replaced.
* ad7768-1
  - Drop explicit setting of INDIO_BUFFER_TRIGGERED as now done by the core.
* adxl345
  - Fix wrong address in dt-binding example.
* adxl367
  - Drop extra update of FIFO watermark.
* at91-sama5d2
  - Limit requested watermark to the hwfifo size.
* bmg160, bme680
  - Typos
* cio-dac
  - Switch to iomap rather than direct use of ioports
* kxsd9
  - Replace CONFIG_PM guards with new PM macros that let the compiler
    cleanly remove the unused code and structures when !CONFIG_PM
* lsm6dsx
  - Use new pm_sleep_ptr() and EXPORT_SIMPLE_DEV_PM_OPS(). Then move
    to Namespace.
* meson_saradc - general cleanup.
  - Avoid attaching resources to iio_dev->dev
  - Use same struct device for all error messages
  - Convert to dev_err_probe() and use local struct device *dev to
    reduce code complexity.
  - Use devm_clk_get_optional() instead of hand rolling.
  - Use regmap_read_poll_timeout() instead of hand rolling.
* mma7660
  - Drop ACPI_PTR() use that is unhelpful.
* mpu3050
  - Stop exporting symbols not used outside of module
  - Switch to new DEFINE_RUNTIME_DEV_PM_OPS() macro and move to Namespace.
* ping
  - Typo fix
* qcom-spmi-rradc
  - Typo fix
* sc27xx
  - Convert to generic struct u32_fract
* srf08
  - Drop a redundant check on !val
* st_lsm6dsx
  - Limit the requested watermark to the hwfifo size.
* stm32-adc
  - Use generic_handle_domain_irq() instead of opencoding.
  - Fix handling of ADC disable.
* stm32-dac
  - Use str_enabled_disable() instead of open coding.
* stx104
  - Switch to iomap rather than direct use of ioports
* tsc2046
  - Drop explicit setting of INDIO_BUFFER_TRIGGERED as now done by the core.
* tsl2563
  - Replace flush_scheduled_work() with cancel_delayed_work_sync()
  - Replace cancel_delayed_work() with cancel_delayed_work_sync()
* vl53l0x
  - Make the VDD regulator optional by allowing a dummy regulator.

* tag 'iio-for-5.20a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio: (244 commits)
  iio: adc: xilinx-xadc: Drop duplicate NULL check in xadc_parse_dt()
  iio: adc: xilinx-xadc: Make use of device properties
  iio: light: cm32181: Add PM support
  iio: adc: ad778-1: do not explicity set INDIO_BUFFER_TRIGGERED mode
  iio: adc: ti-tsc2046: do not explicity set INDIO_BUFFER_TRIGGERED mode
  iio: adc: stm32-adc: disable adc before calibration
  iio: adc: stm32-adc: make safe adc disable
  iio: dac: ad5380: align '*' each line and drop unneeded blank line
  iio: adc: qcom-spmi-rradc: Fix spelling mistake "coherrency" -> "coherency"
  iio: Don't use bare "unsigned"
  dt-bindings: iio: dac: mcp4922: expand for mcp4921 support
  iio: dac: mcp4922: add support to mcp4921
  iio: chemical: sps30: Move symbol exports into IIO_SPS30 namespace
  iio: pressure: bmp280: Move symbol exports to IIO_BMP280 namespace
  iio: imu: bmi160: Move exported symbols to IIO_BMI160 namespace
  iio: adc: stm32-adc: Use generic_handle_domain_irq()
  proximity: vl53l0x: Make VDD regulator actually optional
  MAINTAINERS: add include/dt-bindings/iio to IIO SUBSYSTEM AND DRIVERS
  dt-bindings: iio/accel: Fix adi,adxl345/6 example I2C address
  iio: gyro: bmg160: Fix typo in comment
  ...

7 files changed, 10 insertions, 20 deletions

diff --git a/drivers/iio/gyro/adis16080.c b/drivers/iio/gyro/adis16080.c
index acef59d822b1..14b3abf6dce9 100644
--- a/drivers/iio/gyro/adis16080.c
+++ b/drivers/iio/gyro/adis16080.c
@@ -45,7 +45,7 @@ struct adis16080_state {
 	const struct adis16080_chip_info *info;
 	struct mutex			lock;
 
-	__be16 buf ____cacheline_aligned;
+	__be16 buf __aligned(IIO_DMA_MINALIGN);
 };
 
 static int adis16080_read_sample(struct iio_dev *indio_dev,
diff --git a/drivers/iio/gyro/adis16130.c b/drivers/iio/gyro/adis16130.c
index b9c952e65b55..33cde9e6fca5 100644
--- a/drivers/iio/gyro/adis16130.c
+++ b/drivers/iio/gyro/adis16130.c
@@ -41,7 +41,7 @@
 struct adis16130_state {
 	struct spi_device		*us;
 	struct mutex			buf_lock;
-	u8				buf[4] ____cacheline_aligned;
+	u8				buf[4] __aligned(IIO_DMA_MINALIGN);
 };
 
 static int adis16130_spi_read(struct iio_dev *indio_dev, u8 reg_addr, u32 *val)
diff --git a/drivers/iio/gyro/adxrs450.c b/drivers/iio/gyro/adxrs450.c
index 04f350025215..f84438e0c42c 100644
--- a/drivers/iio/gyro/adxrs450.c
+++ b/drivers/iio/gyro/adxrs450.c
@@ -73,7 +73,7 @@ enum {
 struct adxrs450_state {
 	struct spi_device	*us;
 	struct mutex		buf_lock;
-	__be32			tx ____cacheline_aligned;
+	__be32			tx __aligned(IIO_DMA_MINALIGN);
 	__be32			rx;
 
 };
diff --git a/drivers/iio/gyro/bmg160_core.c b/drivers/iio/gyro/bmg160_core.c
index 81a6d09788bd..cedd9f02ea21 100644
--- a/drivers/iio/gyro/bmg160_core.c
+++ b/drivers/iio/gyro/bmg160_core.c
@@ -766,7 +766,7 @@ static int bmg160_write_event_config(struct iio_dev *indio_dev,
 		return 0;
 	}
 	/*
-	 * We will expect the enable and disable to do operation in
+	 * We will expect the enable and disable to do operation
 	 * in reverse order. This will happen here anyway as our
 	 * resume operation uses sync mode runtime pm calls, the
 	 * suspend operation will be delayed by autosuspend delay
diff --git a/drivers/iio/gyro/fxas21002c_core.c b/drivers/iio/gyro/fxas21002c_core.c
index 0923fd793492..a36d71d9e3ea 100644
--- a/drivers/iio/gyro/fxas21002c_core.c
+++ b/drivers/iio/gyro/fxas21002c_core.c
@@ -150,10 +150,10 @@ struct fxas21002c_data {
 	struct regulator *vddio;
 
 	/*
-	 * DMA (thus cache coherency maintenance) requires the
-	 * transfer buffers to live in their own cache lines.
+	 * DMA (thus cache coherency maintenance) may require the
+	 * transfer buffers live in their own cache lines.
 	 */
-	s16 buffer[8] ____cacheline_aligned;
+	s16 buffer[8] __aligned(IIO_DMA_MINALIGN);
 };
 
 enum fxas21002c_channel_index {
diff --git a/drivers/iio/gyro/mpu3050-core.c b/drivers/iio/gyro/mpu3050-core.c
index 5908a96ca8af..6a6d84a3deda 100644
--- a/drivers/iio/gyro/mpu3050-core.c
+++ b/drivers/iio/gyro/mpu3050-core.c
@@ -1262,7 +1262,6 @@ err_power_down:
 
 	return ret;
 }
-EXPORT_SYMBOL(mpu3050_common_probe);
 
 void mpu3050_common_remove(struct device *dev)
 {
@@ -1278,9 +1277,7 @@ void mpu3050_common_remove(struct device *dev)
 	iio_device_unregister(indio_dev);
 	mpu3050_power_down(mpu3050);
 }
-EXPORT_SYMBOL(mpu3050_common_remove);
 
-#ifdef CONFIG_PM
 static int mpu3050_runtime_suspend(struct device *dev)
 {
 	return mpu3050_power_down(iio_priv(dev_get_drvdata(dev)));
@@ -1290,16 +1287,9 @@ static int mpu3050_runtime_resume(struct device *dev)
 {
 	return mpu3050_power_up(iio_priv(dev_get_drvdata(dev)));
 }
-#endif /* CONFIG_PM */
-
-const struct dev_pm_ops mpu3050_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
-				pm_runtime_force_resume)
-	SET_RUNTIME_PM_OPS(mpu3050_runtime_suspend,
-			   mpu3050_runtime_resume, NULL)
-};
-EXPORT_SYMBOL(mpu3050_dev_pm_ops);
 
+DEFINE_RUNTIME_DEV_PM_OPS(mpu3050_dev_pm_ops, mpu3050_runtime_suspend,
+			  mpu3050_runtime_resume, NULL);
 MODULE_AUTHOR("Linus Walleij");
 MODULE_DESCRIPTION("MPU3050 gyroscope driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/iio/gyro/mpu3050-i2c.c b/drivers/iio/gyro/mpu3050-i2c.c
index 5b5f58baaf7f..78f4a0102986 100644
--- a/drivers/iio/gyro/mpu3050-i2c.c
+++ b/drivers/iio/gyro/mpu3050-i2c.c
@@ -116,7 +116,7 @@ static struct i2c_driver mpu3050_i2c_driver = {
 	.driver = {
 		.of_match_table = mpu3050_i2c_of_match,
 		.name = "mpu3050-i2c",
-		.pm = &mpu3050_dev_pm_ops,
+		.pm = pm_ptr(&mpu3050_dev_pm_ops),
 	},
 };
 module_i2c_driver(mpu3050_i2c_driver);