Add a new Kconfig option to allow RTC drivers to be used in SPL.

Signed-off-by: Simon Glass <s...@chromium.org>
---

 common/spl/Kconfig | 10 ++++++++++
 drivers/Makefile   |  1 +
 2 files changed, 11 insertions(+)

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 0c83ff1..6e0637a 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -410,6 +410,16 @@ config SPL_POWER_SUPPORT
          in drivers/power, drivers/power/pmic and drivers/power/regulator
          as part of an SPL build.
 
+config SPL_RTC_SUPPORT
+       bool "Support RTC drivers"
+       depends on SPL
+       help
+         Enable RTC (Real-time Clock) support in SPL. This includes support
+         for reading and setting the time. Some RTC devices also have some
+         non-volatile (battery-backed) memory which is accessible if
+         needed. This enables the drivers in drivers/rtc as part of an SPL
+         build.
+
 config SPL_SATA_SUPPORT
        bool "Support loading from SATA"
        depends on SPL
diff --git a/drivers/Makefile b/drivers/Makefile
index ae3c76a..0351eaf 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_SPL_ETH_SUPPORT) += net/
 obj-$(CONFIG_SPL_ETH_SUPPORT) += net/phy/
 obj-$(CONFIG_SPL_USBETH_SUPPORT) += net/phy/
 obj-$(CONFIG_SPL_PCI_SUPPORT) += pci/
+obj-$(CONFIG_SPL_RTC_SUPPORT) += rtc/
 obj-$(CONFIG_SPL_MUSB_NEW_SUPPORT) += usb/musb-new/
 obj-$(CONFIG_SPL_USBETH_SUPPORT) += usb/gadget/
 obj-$(CONFIG_SPL_WATCHDOG_SUPPORT) += watchdog/
-- 
2.8.0.rc3.226.g39d4020

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