rtc: sun6i: Add sun6i RTC driver

This patch introduces the driver for the RTC in the Allwinner A31 and
A23 SoCs.

Unlike the RTC found in A10/A20 SoCs, which was part of the timer, the
RTC in A31/A23 are a separate hardware block, which also contain a few
controls for the RTC block hardware (a regulator and RTC block GPIO pin
latches), while also having separate interrupts for the alarms.

The hardware is different enough to make a different driver for it.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Varka Bhadram <varkabhadram@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index a168e96142b9..f2300b4e9b17 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1175,6 +1175,13 @@ config RTC_DRV_SUN4V
           If you say Y here you will get support for the Hypervisor
           based RTC on SUN4V systems.
 
+config RTC_DRV_SUN6I
+        tristate "Allwinner A31 RTC"
+        depends on MACH_SUN6I || MACH_SUN8I
+        help
+          If you say Y here you will get support for the RTC found on
+          Allwinner A31.
+
 config RTC_DRV_SUNXI
         tristate "Allwinner sun4i/sun7i RTC"
         depends on ARCH_SUNXI