rtc: add driver for Maxim 77802 PMIC Real-Time-Clock

The MAX7802 PMIC has a Real-Time-Clock (RTC) with two alarms.  This
patch adds support for the RTC and is based on a driver added by Simon
Glass to the Chrome OS kernel 3.8 tree.

[akpm@linux-foundation.org: add comment clarifying ffs() use]
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Doug Anderson <dianders@chromium.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Olof Johansson <olof@lixom.net>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 943afaf..d59c365 100644 (file)
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -298,6 +298,16 @@ config RTC_DRV_RK808
          This driver can also be built as a module. If so, the module
          will be called rk808-rtc.
 
+config RTC_DRV_MAX77802
+       tristate "Maxim 77802 RTC"
+       depends on MFD_MAX77686
+       help
+         If you say yes here you will get support for the
+         RTC of Maxim MAX77802 PMIC.
+
+         This driver can also be built as a module. If so, the module
+         will be called rtc-max77802.
+
 config RTC_DRV_RS5C372
        tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
        help

diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 7dec7fd..b188323 100644 (file)
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -85,6 +85,7 @@ obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o
 obj-$(CONFIG_RTC_DRV_MAX8997)  += rtc-max8997.o
 obj-$(CONFIG_RTC_DRV_MAX6902)  += rtc-max6902.o
 obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o
+obj-$(CONFIG_RTC_DRV_MAX77802)  += rtc-max77802.o
 obj-$(CONFIG_RTC_DRV_MC13XXX)  += rtc-mc13xxx.o
 obj-$(CONFIG_RTC_DRV_MCP795)   += rtc-mcp795.o
 obj-$(CONFIG_RTC_DRV_MSM6242)  += rtc-msm6242.o

diff --cc drivers/rtc/rtc-max77802.c
Simple merge