iio: ADC driver for EP93xx SoC

This series prepares the necessary infrastructure for ADC platform device on Cirrus Logic EP93xx family of SoCs and adds the driver for ADC device using IIO subsystem.

Changelog
v2:
Added Documentation/iio/ep93xx_adc.txt
Removed extend_name
Added timeout to the status polling loop
Used iio_device_register() instead of devm_iio_device_register()

Alexander Sverdlin (5):
clk: ep93xx: Implement clk_get_parent()
clk: ep93xx: Add ADC clock
ep93xx: Add ADC platform device support to core
edb93xx: Add ADC platform device
iio: adc: New driver for Cirrus Logic EP93xx ADC

 Documentation/iio/ep93xx_adc.txt             |  29 +++
 arch/arm/mach-ep93xx/clock.c                 |  14 ++
 arch/arm/mach-ep93xx/core.c                  |  24 +++
 arch/arm/mach-ep93xx/edb93xx.c               |   1 +
 arch/arm/mach-ep93xx/include/mach/platform.h |   1 +
 arch/arm/mach-ep93xx/soc.h                   |   1 +
 drivers/iio/adc/Kconfig                      |  11 ++
 drivers/iio/adc/Makefile                     |   1 +
 drivers/iio/adc/ep93xx_adc.c                 | 261 +++++++++++++++++++++++++++
 9 files changed, 343 insertions(+)
 create mode 100644 Documentation/iio/ep93xx_adc.txt
 create mode 100644 drivers/iio/adc/ep93xx_adc.c