iio:cdc:ad7150: Move driver out of staging.

This capacitance to digital converter (CDC) driver is compliant with
the IIO ABI.  Note, not all features supported (e.g. window event modes)
but the driver should be in a useful functional state.

The cleanup was done against QEMU emulation of the device rather than
actual hardware.   Whilst this was a bit of an experiment, it made it
easy to confirm that the driver remained in a consistent working state
through the various refactors.  If it worked in the first place, it
should still be working after this cleanup.

Given some IIO drivers require expensive hardware setups, (not particularly
true with this one) the use of QEMU may provide a viable way forward
for providing testing during code changes where previously we'd had
to rely on sharp eyes and crossed fingers.

Note, no explicit MAINTAINERS entry as it will be covered by the
generic catch-alls for ADI and IIO drivers which are sufficient.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20210314181511.531414-25-jic23@kernel.org

diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index b35e0c3..2334ad2 100644 (file)
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@@ -72,6 +72,7 @@ source "drivers/iio/accel/Kconfig"
 source "drivers/iio/adc/Kconfig"
 source "drivers/iio/afe/Kconfig"
 source "drivers/iio/amplifiers/Kconfig"
+source "drivers/iio/cdc/Kconfig"
 source "drivers/iio/chemical/Kconfig"
 source "drivers/iio/common/Kconfig"
 source "drivers/iio/dac/Kconfig"

diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
index 2561325..65e39bd 100644 (file)
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@@ -18,6 +18,7 @@ obj-y += adc/
 obj-y += afe/
 obj-y += amplifiers/
 obj-y += buffer/
+obj-y += cdc/
 obj-y += chemical/
 obj-y += common/
 obj-y += dac/

diff --git a/drivers/iio/cdc/Kconfig b/drivers/iio/cdc/Kconfig
new file mode 100644 (file)
index 0000000..5e3319a
--- /dev/null
+++ b/drivers/iio/cdc/Kconfig
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# CDC drivers
+#
+menu "Capacitance to digital converters"
+
+config AD7150
+       tristate "Analog Devices ad7150/1/6 capacitive sensor driver"
+       depends on I2C
+       help
+         Say yes here to build support for Analog Devices capacitive sensors.
+         (ad7150, ad7151, ad7156) Provides direct access via sysfs.
+
+         To compile this driver as a module, choose M here: the
+         module will be called ad7150.
+
+endmenu

diff --git a/drivers/iio/cdc/Makefile b/drivers/iio/cdc/Makefile
new file mode 100644 (file)
index 0000000..ee49063
--- /dev/null
+++ b/drivers/iio/cdc/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for industrial I/O capacitance to digital converter (CDC) drivers
+#
+
+obj-$(CONFIG_AD7150) += ad7150.o

diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/iio/cdc/ad7150.c
similarity index 100%
rename from drivers/staging/iio/cdc/ad7150.c
rename to drivers/iio/cdc/ad7150.c

diff --git a/drivers/staging/iio/cdc/Kconfig b/drivers/staging/iio/cdc/Kconfig
index e0a5ce6..a7386bb 100644 (file)
--- a/drivers/staging/iio/cdc/Kconfig
+++ b/drivers/staging/iio/cdc/Kconfig
@@ -4,16 +4,6 @@
 #
 menu "Capacitance to digital converters"
 
-config AD7150
-       tristate "Analog Devices ad7150/1/6 capacitive sensor driver"
-       depends on I2C
-       help
-         Say yes here to build support for Analog Devices capacitive sensors.
-         (ad7150, ad7151, ad7156) Provides direct access via sysfs.
-
-         To compile this driver as a module, choose M here: the
-         module will be called ad7150.
-
 config AD7746
        tristate "Analog Devices AD7745, AD7746 AD7747 capacitive sensor driver"
        depends on I2C

diff --git a/drivers/staging/iio/cdc/Makefile b/drivers/staging/iio/cdc/Makefile
index ab82225..afb7499 100644 (file)
--- a/drivers/staging/iio/cdc/Makefile
+++ b/drivers/staging/iio/cdc/Makefile
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 #
-# Makefile for industrial I/O DAC drivers
+# Makefile for industrial I/O CDC drivers
 #
 
-obj-$(CONFIG_AD7150) += ad7150.o
 obj-$(CONFIG_AD7746) += ad7746.o