On Fri, Jan 08, 2016 at 06:34:29PM +0530, Laxman Dewangan wrote:

If we get the parent device, regmap handle and interrupt number from mfd
core independent of the PMIC (MAX77620 or MAX77686), then same driver can be
used here.
Two way which I can think of here:

Parent device is just dev->parent, you can use dev_get_regmap() to get a
regmap given a struct device and you can use platform resources to pass
the interrupts to the children from the MFD (there's some examples,
wm831x is one).