iio: frequency: New driver for Analog Devices ADF4350/ADF4351 Wideband Synthesizers

Changes since V1:
Apply Jonathan's review feedback:
    Introduce and use IIO_ALTVOLTAGE.
    Fix up comments and documentation.
    Remove dead code.
    Reorder some code fragments.
    Add missing iio_device_free.

Convert to new API.
Fix-up out of staging includes.
Removed pll_locked attribute.

Changes since V2:
Use module_spi_driver.
adf4350_remove: move gpio_free after regulator.
target patch to drivers/iio

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>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/iio/frequency/Kconfig b/drivers/iio/frequency/Kconfig
index 0458c92464a3..6aaa33ef4544 100644
--- a/drivers/iio/frequency/Kconfig
+++ b/drivers/iio/frequency/Kconfig
@@ -20,4 +20,22 @@ config AD9523
           module will be called ad9523.
 
 endmenu
+
+#
+# Phase-Locked Loop (PLL) frequency synthesizers
+#
+
+menu "Phase-Locked Loop (PLL) frequency synthesizers"
+
+config ADF4350
+        tristate "Analog Devices ADF4350/ADF4351 Wideband Synthesizers"
+        depends on SPI
+        help
+          Say yes here to build support for Analog Devices  ADF4350/ADF4351
+          Wideband Synthesizers. The driver provides direct access via sysfs.
+
+          To compile this driver as a module, choose M here: the
+          module will be called adf4350.
+
+endmenu
 endmenu