[PATCH 08/14] rtc: Implement nvmem interface

[Sean Anderson]

This adds nvmem support for RTCs with nvmem registers.

Signed-off-by: Sean Anderson <sean.anderson at seco.com>
---

 drivers/rtc/rtc-uclass.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/rtc/rtc-uclass.c b/drivers/rtc/rtc-uclass.c
index e5ae6ea4d5..345185d2b8 100644
--- a/drivers/rtc/rtc-uclass.c
+++ b/drivers/rtc/rtc-uclass.c
@@ -11,6 +11,7 @@
 #include <errno.h>
 #include <log.h>
 #include <rtc.h>
+#include <nvmem.h>
 
 int dm_rtc_get(struct udevice *dev, struct rtc_time *time)
 {
@@ -181,3 +182,21 @@ UCLASS_DRIVER(rtc) = {
 	.post_bind	= dm_scan_fdt_dev,
 #endif
 };
+
+static int rtc_nvmem_read(struct udevice *dev, unsigned int offset, void *buf,
+			  size_t size)
+{
+	return dm_rtc_read(dev, offset, buf, size);
+}
+
+static int rtc_nvmem_write(struct udevice *dev, unsigned int offset,
+			   const void *buf, size_t size)
+{
+	return dm_rtc_write(dev, offset, buf, size);
+}
+
+NVMEM_INTERFACE(rtc) = {
+	.id = UCLASS_RTC,
+	.read = rtc_nvmem_read,
+	.write = rtc_nvmem_write,
+};
-- 
2.25.1