This fixes below build warning if CONFIG_OF is not set.

  CC      drivers/mfd/max77686.o
drivers/mfd/max77686.c:37:42: warning: 'max77686_pmic_dt_match' defined but not used [-Wunused-variable]
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch adds device tree support for mfd driver and adds
Documentation/devicetree/bindings/mfd/max77686.txt.
This patch also intialize max77686 pointer to NULL in max77686_i2c_probe
to silent a compile time warning.
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Reviwed-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Presently driver expects irq_gpio pin in platform data and maps it to irq
itself. But we can also directly specify the interrupt in DT or platform file.
Signed-off-by: NYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Now this driver is using regmap API, the iolock mutex is not used and
can be removed.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch is device driver for MAX77686 chip.
MAX77686 is PMIC and includes regulator and rtc on it.
This driver is core of MAX77686 chip, so provides common support for
accessing on-chip devices. It uses irq_domain to manage irq and regmap
to read/write data to its register with i2c bus.
Signed-off-by: NChiwoong Byun <woong.byun@samsung.com>
Signed-off-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: NMyungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>