mfd: add U300 AB3100 core support

This adds a core driver for the AB3100 mixed-signal circuit
found in the ST-Ericsson U300 series platforms. This driver
is a singleton proxy for all accesses to the AB3100
sub-drivers which will be merged on top of this one, RTC,
regulators, battery and system power control, vibrator,
LEDs, and an ALSA codec.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Reviewed-by: Mike Rapoport <mike@compulab.co.il>
Reviewed-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index ee3927ab11e0..61f0346650b3 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -241,6 +241,20 @@ config PCF50633_GPIO
          Say yes here if you want to include support GPIO for pins on
          the PCF50633 chip.
 
+config AB3100_CORE
+        tristate "ST-Ericsson AB3100 Mixed Signal Circuit core functions"
+        depends on I2C
+        default y if ARCH_U300
+        help
+          Select this to enable the AB3100 Mixed Signal IC core
+          functionality. This connects to a AB3100 on the I2C bus
+          and expose a number of symbols needed for dependent devices
+          to read and write registers and subscribe to events from
+          this multi-functional IC. This is needed to use other features
+          of the AB3100 such as battery-backed RTC, charging control,
+          LEDs, vibrator, system power and temperature, power management
+          and ALSA sound.
+
 endmenu
 
 menu "Multimedia Capabilities Port drivers"