This driver compatible with pcf2127 and pcf2129
Signed-off-by: Meng Yi meng.yi@nxp.com --- drivers/rtc/Makefile | 1 + drivers/rtc/pcf2127.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 95 insertions(+) create mode 100644 drivers/rtc/pcf2127.c
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index fc38a3f..c919427 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_RTC_MV) += mvrtc.o obj-$(CONFIG_RTC_MX27) += mx27rtc.o obj-$(CONFIG_RTC_MXS) += mxsrtc.o obj-$(CONFIG_RTC_PCF8563) += pcf8563.o +obj-$(CONFIG_RTC_PCF2127) += pcf2127.o obj-$(CONFIG_RTC_PL031) += pl031.o obj-$(CONFIG_RTC_PT7C4338) += pt7c4338.o obj-$(CONFIG_RTC_RS5C372A) += rs5c372.o diff --git a/drivers/rtc/pcf2127.c b/drivers/rtc/pcf2127.c new file mode 100644 index 0000000..4cb0934 --- /dev/null +++ b/drivers/rtc/pcf2127.c @@ -0,0 +1,94 @@ +/* + * Copyright (C) 2016 by NXP Semiconductors Inc. + * Date & Time support for PCF2127 RTC + */ + +/* #define DEBUG */ + +#include <common.h> +#include <command.h> +#include <rtc.h> +#include <i2c.h> + +#if defined(CONFIG_CMD_DATE) + +#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) + +int rtc_set(struct rtc_time *tm) +{ + uchar buf[8]; + int i = 0, err; + + /* 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++] = bin2bcd(tm->tm_hour); + buf[i++] = bin2bcd(tm->tm_mday); + buf[i++] = tm->tm_wday & 0x07; + + /* month, 1 - 12 */ + buf[i++] = bin2bcd(tm->tm_mon + 1); + + /* year */ + buf[i++] = bin2bcd(tm->tm_year % 100); + + /* write register's data */ + err = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, + PCF2127_REG_CTRL1, 0, buf, sizeof(buf)); + if (err != 0) + return -1; + + return 0; +} + +int rtc_get(struct rtc_time *tmp) +{ + int rel = 0; + uchar buf[10] = { PCF2127_REG_CTRL1 }; + + if (i2c_write(CONFIG_SYS_I2C_RTC_ADDR, + PCF2127_REG_CTRL1, 0, buf, 1) != 0) + return -1; + if (i2c_read(CONFIG_SYS_I2C_RTC_ADDR, + PCF2127_REG_CTRL1, 0, buf, sizeof(buf)) != 0) + return -1; + + if (buf[PCF2127_REG_CTRL3] & 0x04) + puts("### Warning: RTC Low Voltage - date/time not reliable\n"); + + tmp->tm_sec = bcd2bin(buf[PCF2127_REG_SC] & 0x7F); + tmp->tm_min = bcd2bin(buf[PCF2127_REG_MN] & 0x7F); + tmp->tm_hour = bcd2bin(buf[PCF2127_REG_HR] & 0x3F); + tmp->tm_mday = bcd2bin(buf[PCF2127_REG_DM] & 0x3F); + tmp->tm_mon = bcd2bin(buf[PCF2127_REG_MO] & 0x1F) - 1; + tmp->tm_year = bcd2bin(buf[PCF2127_REG_YR]) + 1900; + if (tmp->tm_year < 1970) + tmp->tm_year += 100; /* assume we are in 1970...2069 */ + tmp->tm_wday = buf[PCF2127_REG_DW] & 0x07; + tmp->tm_yday = 0; + tmp->tm_isdst = 0; + + debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", + tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, + tmp->tm_hour, tmp->tm_min, tmp->tm_sec); + + return rel; +} + +void rtc_reset(void) +{ + /*Doing nothing here*/ +} +#endif