Hi All,

RTC PCF85263 is used by iWave RZ/G1C SBC( iwg23s) platform.  We have upstreamed  this driver support  on 4.19 kernel [1]

[1]. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/rtc/rtc-pcf85363.c?h=v5.2&id=fc979933bcf162595b6004d0de4effb64c323152

This driver is based  on RTC PCF 85363 driver which has rtc nvmem/alarm support [2] .  Rtc nvmem framework is introduced in 4.13

[2]. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/rtc/rtc-pcf85363.c?h=v5.2&id=a9687aa2764dd2669602bd19dc636cbeef5293d5

We are seeing the following options for backporting this driver to 4.4 kernel

Option 1:

Backport this driver[1] to 4.4 kernel along with nvmem/alarm support. we have already done this work and patches are available at [3]

[3]. https://gitlab.com/bijud/pcf85263/tree/master

Option 2:

Backport RTC PCF85263 driver, removing  Alarm/nvmem functionality from  [2] .

Option 3:

Don't backport RTC support at all.

Please share your views, so that I can work on this accordingly.

Regards,

Biju