On Friday 08 January 2016 07:06 PM, Mark Brown wrote:

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

quoted

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).

I think it should work with named regmap. mfd whould init regmap with 
name and rtc driver should ask with same name.

I saw three drivers which looks same:
rtc-max77620.c (new from me) and already available rtc-max77686.c, 
rtc-max77802.c

Seems I can develop IP based rtc driver as rtc-max77xxx.c