rtc: add NXP PCF8523 support

Add an RTC driver for PCF8523 chips by NXP Semiconductors.  No support is
currently provided for the alarm and interrupt functions.  Only the time
and date functionality is implemented.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 608a7b1794e3..5bb031461d75 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -269,6 +269,15 @@ config RTC_DRV_X1205
           This driver can also be built as a module. If so, the module
           will be called rtc-x1205.
 
+config RTC_DRV_PCF8523
+        tristate "NXP PCF8523"
+        help
+          If you say yes here you get support for the NXP PCF8523 RTC
+          chips.
+
+          This driver can also be built as a module. If so, the module
+          will be called rtc-pcf8523.
+
 config RTC_DRV_PCF8563
         tristate "Philips PCF8563/Epson RTC8564"
         help