#include <i2c.h>
#include <rtc.h>
-#define PCF2127_REG_CTRL1 (0x00)
-#define PCF2127_REG_CTRL2 (0x01)
-#define PCF2127_REG_CTRL3 (0x02)
-#define PCF2127_REG_SC (0x03) /* datetime */
-#define PCF2127_REG_MN (0x04)
-#define PCF2127_REG_HR (0x05)
-#define PCF2127_REG_DM (0x06)
-#define PCF2127_REG_DW (0x07)
-#define PCF2127_REG_MO (0x08)
-#define PCF2127_REG_YR (0x09)
+#define PCF2127_REG_CTRL1 0x00
+#define PCF2127_REG_CTRL2 0x01
+#define PCF2127_REG_CTRL3 0x02
+#define PCF2127_REG_SC 0x03
+#define PCF2127_REG_MN 0x04
+#define PCF2127_REG_HR 0x05
+#define PCF2127_REG_DM 0x06
+#define PCF2127_REG_DW 0x07
+#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];
- int i = 0;
-
- /* start register address */
- buf[i++] = PCF2127_REG_SC;
+ uchar buf[7] = {0};
+ int i = 0, ret;
/* hours, minutes and seconds */
buf[i++] = bin2bcd(tm->tm_sec);
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 */
- if (dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, sizeof(buf)) < 0)
- return -1;
+ ret = dm_i2c_write(dev, PCF2127_REG_SC, buf, i);
- return 0;
+ return ret;
}
static int pcf2127_rtc_get(struct udevice *dev, struct rtc_time *tm)
{
- int rel = 0;
+ int ret = 0;
uchar buf[10] = { PCF2127_REG_CTRL1 };
- if (dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, 1) < 0)
- return -1;
- if (dm_i2c_read(dev, PCF2127_REG_CTRL1, buf, sizeof(buf)) < 0)
- return -1;
+ ret = pcf2127_read_reg(dev, PCF2127_REG_CTRL1, buf, sizeof(buf));
+ if (ret < 0)
+ return ret;
if (buf[PCF2127_REG_CTRL3] & 0x04)
puts("### Warning: RTC Low Voltage - date/time not reliable\n");
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 */
tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
- return rel;
+ return ret;
}
static int pcf2127_rtc_reset(struct udevice *dev)
{
/*Doing nothing here*/
+
return 0;
}