rtc: allow rtc_set to return an error and use it in cmd_date

[karo-tx-uboot.git] / drivers / rtc / m41t62.c

diff --git a/drivers/rtc/m41t62.c b/drivers/rtc/m41t62.c
index 89d4ccdb2c75112a6adb570e553b2971a26a0cec..9b7c84a084f621caddd10664e1a16abbd8fa5e6f 100644 (file)
--- a/drivers/rtc/m41t62.c
+++ b/drivers/rtc/m41t62.c
@@ -96,7 +96,7 @@ int rtc_get(struct rtc_time *tm)
        return 0;
 }
 
-void rtc_set(struct rtc_time *tm)
+int rtc_set(struct rtc_time *tm)
 {
        u8 buf[M41T62_DATETIME_REG_SIZE];
 
@@ -123,8 +123,12 @@ void rtc_set(struct rtc_time *tm)
        /* assume 20YY not 19YY */
        buf[M41T62_REG_YEAR] = BIN2BCD(tm->tm_year % 100);
 
-       if (i2c_write(CFG_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE))
+       if (i2c_write(CFG_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE)) {
                printf("I2C write failed in %s()\n", __func__);
+               return -1;
+       }
+
+       return 0;
 }
 
 void rtc_reset(void)