rtc: add support for the S-35390A RTC chip

This adds basic get/set time support for the Seiko Instruments S-35390A.
This chip communicates using I2C and is used on the QNAP TS-109/TS-209 NAS
devices.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Byron Bradley <byron.bbradley@gmail.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Acked-by: David Brownell <david-b@pacbell.net>
Tested-by: Tim Ellis <tim@ngndg.com>
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 6402d699072b..82f5ad9c3af4 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -250,6 +250,15 @@ config RTC_DRV_TWL92330
           platforms.  The support is integrated with the rest of
           the Menelaus driver; it's not separate module.
 
+config RTC_DRV_S35390A
+        tristate "Seiko Instruments S-35390A"
+        help
+          If you say yes here you will get support for the Seiko
+          Instruments S-35390A.
+
+          This driver can also be built as a module. If so the module
+          will be called rtc-s35390a.
+
 endif # I2C
 
 comment "SPI RTC drivers"