SPDX: Convert all of our single license tags to Linux Kernel style

[u-boot] / drivers / rtc / rtc-uclass.c

diff --git a/drivers/rtc/rtc-uclass.c b/drivers/rtc/rtc-uclass.c
index fe74c69f97ec3a3ebb9164a0e585b482b6d66628..c676f0ff359a1bc8572a4c4214dfc625d4d4adfe 100644 (file)
--- a/drivers/rtc/rtc-uclass.c
+++ b/drivers/rtc/rtc-uclass.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2015 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
@@ -60,6 +59,36 @@ 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;
@@ -68,7 +97,7 @@ int rtc_read32(struct udevice *dev, unsigned int reg, u32 *valuep)
 
        for (i = 0; i < sizeof(value); i++) {
                ret = rtc_read8(dev, reg + i);
-               if (ret)
+               if (ret < 0)
                        return ret;
                value |= ret << (i << 3);
        }