mfd: Add Ricoh RN5T618 PMIC core driver

Ricoh RN5T618 is a power management IC which integrates 3 step-down
DCDC converters, 7 low-dropout regulators, a Li-ion battery charger,
fuel gauge, ADC, GPIOs and a watchdog timer.

This commit adds a MFD core driver to support the I2C communication
with the device.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index fc419da8d722..82f70dcab136 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -597,6 +597,17 @@ config MFD_RC5T583
           Additional drivers must be enabled in order to use the
           different functionality of the device.
 
+config MFD_RN5T618
+        tristate "Ricoh RN5T5618 PMIC"
+        depends on I2C
+        select MFD_CORE
+        select REGMAP_I2C
+        help
+          Say yes here to add support for the Ricoh RN5T618 PMIC. This
+          driver provides common support for accessing the device,
+          additional drivers must be enabled in order to use the
+          functionality of the device.
+
 config MFD_SEC_CORE
         bool "SAMSUNG Electronics PMIC Series Support"
         depends on I2C=y