staging: iio: ad9832: use clock framework for clock reference

Previously external clock were set through platform_data struct.
Now device uses clk struct defined in include/linux/clk.h to handle
external clock source.
It also removes mclk from platform_data struct.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

staging: iio: add proper SPDX identifiers to remaining driver files

There are a number of IIO staging drivers that do not have a proper SPDX
identifier on it. So fix that up and at the same time, remove the "free
form" license text, as that's pretty much impossible for any tool to
parse.

Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Michael Hennerich <Michael.Hennerich@analog.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: iio: ad9832: Moved contents of the header to the source file

Moved the contents of the header(ad9832.h) into the corresponding source file
with the exception of the platform data struct which is supposed to be
used from somewhere else other than the driver.

Signed-off-by: Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

staging: iio: ad9832: clean-up regulator 'reg'

Rename regulator 'reg' to 'avdd' so as to be clear what regulator it
stands for specifically. Additionally, get rid of local variable 'reg'
and use direct assignment instead. Update also the goto label pertaining
to the avdd regulator during disable.

Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

staging: iio: ad9832: add DVDD regulator

The AD9832/AD9835 is supplied with two power sources: AVDD as analog
supply voltage and DVDD as digital supply voltage.

Attempt to fetch and enable the regulator 'dvdd'. Bail out if any error
occurs.

Suggested-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Eva Rachel Retuya <eraretuya@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Staging: iio: Prefer using the BIT macro

This patch replaces bit shifting on 1 with the BIT(x) macro
as it's extensively used by other function in this driver.

This was done with coccinelle:
@@ int g; @@

-(1 << g)
+BIT(g)

Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Reviewed-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging:iio:ad9832: Mark transfer buffers as __be16

Fixes the following warnings from sparse:
drivers/staging/iio/frequency/ad9832.c:43:26: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:43:26: expected unsigned short [unsigned] [short] <noident>
drivers/staging/iio/frequency/ad9832.c:43:26: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:46:26: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:46:26: expected unsigned short [unsigned] [short] <noident>
drivers/staging/iio/frequency/ad9832.c:46:26: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:49:26: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:49:26: expected unsigned short [unsigned] [short] <noident>
drivers/staging/iio/frequency/ad9832.c:49:26: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:52:26: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:52:26: expected unsigned short [unsigned] [short] <noident>
drivers/staging/iio/frequency/ad9832.c:52:26: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:65:27: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:65:27: expected unsigned short [unsigned] [short] <noident>
drivers/staging/iio/frequency/ad9832.c:65:27: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:68:27: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:68:27: expected unsigned short [unsigned] [short] <noident>
drivers/staging/iio/frequency/ad9832.c:68:27: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:107:26: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:107:26: expected unsigned short [unsigned] data
drivers/staging/iio/frequency/ad9832.c:107:26: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:120:26: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:120:26: expected unsigned short [unsigned] data
drivers/staging/iio/frequency/ad9832.c:120:26: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:133:26: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:133:26: expected unsigned short [unsigned] data
drivers/staging/iio/frequency/ad9832.c:133:26: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:144:26: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:144:26: expected unsigned short [unsigned] data
drivers/staging/iio/frequency/ad9832.c:144:26: got restricted __be16 [usertype] <noident>
drivers/staging/iio/frequency/ad9832.c:277:18: warning: incorrect type in assignment (different base types)
drivers/staging/iio/frequency/ad9832.c:277:18: expected unsigned short [unsigned] data
drivers/staging/iio/frequency/ad9832.c:277:18: got restricted __be16 [usertype] <noident>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

iio: Rename iio/dds to iio/frequency

Generalize naming to allow other frequency synthesis techniques as well.
No functional changes.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>