#define PCF2127_REG_MO 0x08
#define PCF2127_REG_YR 0x09
+static int pcf2127_read_reg(struct udevice *dev, uint offset,
+ u8 *buffer, int len)
+{
+ struct dm_i2c_chip *chip = dev_get_parent_platdata(dev);
+ struct i2c_msg msg;
+ int ret;
+
+ /* Set the address of the start register to be read */
+ ret = dm_i2c_write(dev, offset, NULL, 0);
+ if (ret < 0)
+ return ret;
+
+ /* Read register's data */
+ msg.addr = chip->chip_addr;
+ msg.flags |= I2C_M_RD;
+ msg.len = len;
+ msg.buf = buffer;
+
+ return dm_i2c_xfer(dev, &msg, 1);
+}
+
static int pcf2127_rtc_set(struct udevice *dev, const struct rtc_time *tm)
{
- uchar buf[8];
+ uchar buf[7] = {0};
int i = 0, ret;
- /* start register address */
- buf[i++] = PCF2127_REG_SC;
-
/* hours, minutes and seconds */
buf[i++] = bin2bcd(tm->tm_sec);
buf[i++] = bin2bcd(tm->tm_min);
buf[i++] = tm->tm_wday & 0x07;
/* month, 1 - 12 */
- buf[i++] = bin2bcd(tm->tm_mon + 1);
+ buf[i++] = bin2bcd(tm->tm_mon);
/* year */
buf[i++] = bin2bcd(tm->tm_year % 100);
/* write register's data */
- ret = dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, sizeof(buf));
+ ret = dm_i2c_write(dev, PCF2127_REG_SC, buf, i);
return ret;
}
int ret = 0;
uchar buf[10] = { PCF2127_REG_CTRL1 };
- ret = dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, 1);
- if (ret < 0)
- return ret;
- ret = dm_i2c_read(dev, PCF2127_REG_CTRL1, buf, sizeof(buf));
+ ret = pcf2127_read_reg(dev, PCF2127_REG_CTRL1, buf, sizeof(buf));
if (ret < 0)
return ret;
tm->tm_min = bcd2bin(buf[PCF2127_REG_MN] & 0x7F);
tm->tm_hour = bcd2bin(buf[PCF2127_REG_HR] & 0x3F);
tm->tm_mday = bcd2bin(buf[PCF2127_REG_DM] & 0x3F);
- tm->tm_mon = bcd2bin(buf[PCF2127_REG_MO] & 0x1F) - 1;
+ tm->tm_mon = bcd2bin(buf[PCF2127_REG_MO] & 0x1F);
tm->tm_year = bcd2bin(buf[PCF2127_REG_YR]) + 1900;
if (tm->tm_year < 1970)
tm->tm_year += 100; /* assume we are in 1970...2069 */