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path: root/drivers/rtc/rtc-uclass.c
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Diffstat (limited to 'drivers/rtc/rtc-uclass.c')
-rw-r--r--drivers/rtc/rtc-uclass.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-uclass.c b/drivers/rtc/rtc-uclass.c
index 300e9b30ec..89312c51ff 100644
--- a/drivers/rtc/rtc-uclass.c
+++ b/drivers/rtc/rtc-uclass.c
@@ -60,6 +60,36 @@ int rtc_write8(struct udevice *dev, unsigned int reg, int val)
return ops->write8(dev, reg, val);
}
+int rtc_read16(struct udevice *dev, unsigned int reg, u16 *valuep)
+{
+ u16 value = 0;
+ int ret;
+ int i;
+
+ for (i = 0; i < sizeof(value); i++) {
+ ret = rtc_read8(dev, reg + i);
+ if (ret < 0)
+ return ret;
+ value |= ret << (i << 3);
+ }
+
+ *valuep = value;
+ return 0;
+}
+
+int rtc_write16(struct udevice *dev, unsigned int reg, u16 value)
+{
+ int i, ret;
+
+ for (i = 0; i < sizeof(value); i++) {
+ ret = rtc_write8(dev, reg + i, (value >> (i << 3)) & 0xff);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
int rtc_read32(struct udevice *dev, unsigned int reg, u32 *valuep)
{
u32 value = 0;