rtc: m41t62: Extract common RTC handling code to facilitate DM conversion

This change facilitates the conversion of m41t62 RTC driver to device
model (DM).

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/rtc/m41t62.c b/drivers/rtc/m41t62.c
index cc230e2b78ee49a0c0604b8acd2834c2d2799272..94f2e0f332d2419af1a408650b2864faafedda81 100644 (file)
--- a/drivers/rtc/m41t62.c
+++ b/drivers/rtc/m41t62.c
@@ -49,12 +49,8 @@
 
 #define M41T80_ALHOUR_HT       (1 << 6)        /* HT: Halt Update Bit */
 
-int rtc_get(struct rtc_time *tm)
+static void m41t62_update_rtc_time(struct rtc_time *tm, u8 *buf)
 {
-       u8 buf[M41T62_DATETIME_REG_SIZE];
-
-       i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
-
        debug("%s: raw read data - sec=%02x, min=%02x, hr=%02x, "
              "mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n",
              __FUNCTION__,
@@ -77,20 +73,14 @@ int rtc_get(struct rtc_time *tm)
              __FUNCTION__,
              tm->tm_sec, tm->tm_min, tm->tm_hour,
              tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
-
-       return 0;
 }
 
-int rtc_set(struct rtc_time *tm)
+static void m41t62_set_rtc_buf(const struct rtc_time *tm, u8 *buf)
 {
-       u8 buf[M41T62_DATETIME_REG_SIZE];
-
        debug("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
              tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
              tm->tm_hour, tm->tm_min, tm->tm_sec);
 
-       i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
-
        /* Merge time-data and register flags into buf[0..7] */
        buf[M41T62_REG_SSEC] = 0;
        buf[M41T62_REG_SEC] =
@@ -107,6 +97,24 @@ int rtc_set(struct rtc_time *tm)
                bin2bcd(tm->tm_mon) | (buf[M41T62_REG_MON] & ~0x1f);
        /* assume 20YY not 19YY */
        buf[M41T62_REG_YEAR] = bin2bcd(tm->tm_year % 100);
+}
+
+int rtc_get(struct rtc_time *tm)
+{
+       u8 buf[M41T62_DATETIME_REG_SIZE];
+
+       i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+       m41t62_update_rtc_time(tm, buf);
+
+       return 0;
+}
+
+int rtc_set(struct rtc_time *tm)
+{
+       u8 buf[M41T62_DATETIME_REG_SIZE];
+
+       i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+       m41t62_set_rtc_buf(tm, buf);
 
        if (i2c_write(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf,
                      M41T62_DATETIME_REG_SIZE)) {