diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index cad667a404..aa6d90158c 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -166,4 +166,13 @@ config RTC_STM32
 	help
 	  Enable STM32 RTC driver. This driver supports the rtc that is present
 	  on some STM32 SoCs.
+
+config RTC_ABX80X
+	bool "Enable Abracon ABx80x RTC driver"
+	depends on DM_RTC
+	help
+	  If you say yes here you get support for Abracon AB080X and AB180X
+	  families of ultra-low-power  battery- and capacitor-backed real-time
+	  clock chips.
+
 endmenu
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index ef66dc4bf0..6a45a9c874 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -55,3 +55,4 @@ obj-$(CONFIG_RTC_S35392A) += s35392a.o
 obj-$(CONFIG_RTC_STM32) += stm32_rtc.o
 obj-$(CONFIG_SANDBOX) += sandbox_rtc.o
 obj-$(CONFIG_RTC_X1205) += x1205.o
+obj-$(CONFIG_RTC_ABX80X) += abx80x.o
diff --git a/drivers/rtc/abx80x.c b/drivers/rtc/abx80x.c
new file mode 100644
index 0000000000..528b06cbd6
--- /dev/null
+++ b/drivers/rtc/abx80x.c
@@ -0,0 +1,553 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * A driver for the I2C members of the Abracon AB x8xx RTC family,
+ * and compatible: AB 1805 and AB 0805
+ *
+ * Copyright 2014-2015 Macq S.A.
+ * Copyright 2020 Linaro
+ *
+ * Author: Philippe De Muyter <phdm@macqel.be>
+ * Author: Alexandre Belloni <alexandre.belloni@bootlin.com>
+ * Author: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
+ *
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2c.h>
+#include <rtc.h>
+#include <log.h>
+
+#define ABX8XX_REG_HTH		0x00
+#define ABX8XX_REG_SC		0x01
+#define ABX8XX_REG_MN		0x02
+#define ABX8XX_REG_HR		0x03
+#define ABX8XX_REG_DA		0x04
+#define ABX8XX_REG_MO		0x05
+#define ABX8XX_REG_YR		0x06
+#define ABX8XX_REG_WD		0x07
+
+#define ABX8XX_REG_AHTH		0x08
+#define ABX8XX_REG_ASC		0x09
+#define ABX8XX_REG_AMN		0x0a
+#define ABX8XX_REG_AHR		0x0b
+#define ABX8XX_REG_ADA		0x0c
+#define ABX8XX_REG_AMO		0x0d
+#define ABX8XX_REG_AWD		0x0e
+
+#define ABX8XX_REG_STATUS	0x0f
+#define ABX8XX_STATUS_AF	BIT(2)
+#define ABX8XX_STATUS_BLF	BIT(4)
+#define ABX8XX_STATUS_WDT	BIT(6)
+
+#define ABX8XX_REG_CTRL1	0x10
+#define ABX8XX_CTRL_WRITE	BIT(0)
+#define ABX8XX_CTRL_ARST	BIT(2)
+#define ABX8XX_CTRL_12_24	BIT(6)
+
+#define ABX8XX_REG_CTRL2	0x11
+#define ABX8XX_CTRL2_RSVD	BIT(5)
+
+#define ABX8XX_REG_IRQ		0x12
+#define ABX8XX_IRQ_AIE		BIT(2)
+#define ABX8XX_IRQ_IM_1_4	(0x3 << 5)
+
+#define ABX8XX_REG_CD_TIMER_CTL	0x18
+
+#define ABX8XX_REG_OSC		0x1c
+#define ABX8XX_OSC_FOS		BIT(3)
+#define ABX8XX_OSC_BOS		BIT(4)
+#define ABX8XX_OSC_ACAL_512	BIT(5)
+#define ABX8XX_OSC_ACAL_1024	BIT(6)
+
+#define ABX8XX_OSC_OSEL		BIT(7)
+
+#define ABX8XX_REG_OSS		0x1d
+#define ABX8XX_OSS_OF		BIT(1)
+#define ABX8XX_OSS_OMODE	BIT(4)
+
+#define ABX8XX_REG_WDT		0x1b
+#define ABX8XX_WDT_WDS		BIT(7)
+#define ABX8XX_WDT_BMB_MASK	0x7c
+#define ABX8XX_WDT_BMB_SHIFT	2
+#define ABX8XX_WDT_MAX_TIME	(ABX8XX_WDT_BMB_MASK >> ABX8XX_WDT_BMB_SHIFT)
+#define ABX8XX_WDT_WRB_MASK	0x03
+#define ABX8XX_WDT_WRB_1HZ	0x02
+
+#define ABX8XX_REG_CFG_KEY	0x1f
+#define ABX8XX_CFG_KEY_OSC	0xa1
+#define ABX8XX_CFG_KEY_MISC	0x9d
+
+#define ABX8XX_REG_ID0		0x28
+
+#define ABX8XX_REG_OUT_CTRL	0x30
+#define ABX8XX_OUT_CTRL_EXDS	BIT(4)
+
+#define ABX8XX_REG_TRICKLE	0x20
+#define ABX8XX_TRICKLE_CHARGE_ENABLE	0xa0
+#define ABX8XX_TRICKLE_STANDARD_DIODE	0x8
+#define ABX8XX_TRICKLE_SCHOTTKY_DIODE	0x4
+
+static u8 trickle_resistors[] = {0, 3, 6, 11};
+
+enum abx80x_chip {AB0801, AB0803, AB0804, AB0805,
+	AB1801, AB1803, AB1804, AB1805, RV1805, ABX80X};
+
+struct abx80x_cap {
+	u16 pn;
+	bool has_tc;
+	bool has_wdog;
+};
+
+static struct abx80x_cap abx80x_caps[] = {
+	[AB0801] = {.pn = 0x0801},
+	[AB0803] = {.pn = 0x0803},
+	[AB0804] = {.pn = 0x0804, .has_tc = true, .has_wdog = true},
+	[AB0805] = {.pn = 0x0805, .has_tc = true, .has_wdog = true},
+	[AB1801] = {.pn = 0x1801},
+	[AB1803] = {.pn = 0x1803},
+	[AB1804] = {.pn = 0x1804, .has_tc = true, .has_wdog = true},
+	[AB1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true},
+	[RV1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true},
+	[ABX80X] = {.pn = 0}
+};
+
+static int abx80x_rtc_read8(struct udevice *dev, unsigned int reg)
+{
+	int ret = 0;
+	u8 buf;
+
+	if (reg > 0xff)
+		return -EINVAL;
+
+	ret = dm_i2c_read(dev, reg, &buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	return buf;
+}
+
+static int abx80x_rtc_write8(struct udevice *dev, unsigned int reg, int val)
+{
+	u8 buf = (u8)val;
+
+	if (reg > 0xff)
+		return -EINVAL;
+
+	return dm_i2c_write(dev, reg, &buf, sizeof(buf));
+}
+
+static int abx80x_is_rc_mode(struct udevice *dev)
+{
+	int flags = 0;
+
+	flags =  dm_i2c_reg_read(dev, ABX8XX_REG_OSS);
+	if (flags < 0) {
+		log_err("Failed to read autocalibration attribute\n");
+		return flags;
+	}
+
+	return (flags & ABX8XX_OSS_OMODE) ? 1 : 0;
+}
+
+static int abx80x_enable_trickle_charger(struct udevice *dev, u8 trickle_cfg)
+{
+	int err;
+
+	/*
+	 * Write the configuration key register to enable access to the Trickle
+	 * register
+	 */
+	err = dm_i2c_reg_write(dev, ABX8XX_REG_CFG_KEY, ABX8XX_CFG_KEY_MISC);
+	if (err < 0) {
+		log_err("Unable to write configuration key\n");
+		return -EIO;
+	}
+
+	err = dm_i2c_reg_write(dev, ABX8XX_REG_TRICKLE,
+			       ABX8XX_TRICKLE_CHARGE_ENABLE | trickle_cfg);
+	if (err < 0) {
+		log_err("Unable to write trickle register\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int abx80x_rtc_read_time(struct udevice *dev, struct rtc_time *tm)
+{
+	unsigned char buf[8];
+	int err, flags, rc_mode = 0;
+
+	/* Read the Oscillator Failure only in XT mode */
+	rc_mode = abx80x_is_rc_mode(dev);
+	if (rc_mode < 0)
+		return rc_mode;
+
+	if (!rc_mode) {
+		flags = dm_i2c_reg_read(dev, ABX8XX_REG_OSS);
+		if (flags < 0) {
+			log_err("Unable to read oscillator status.\n");
+			return flags;
+		}
+
+		if (flags & ABX8XX_OSS_OF)
+			log_debug("Oscillator fail, data is not accurate.\n");
+	}
+
+	err = dm_i2c_read(dev, ABX8XX_REG_HTH,
+			  buf, sizeof(buf));
+	if (err < 0) {
+		log_err("Unable to read date\n");
+		return -EIO;
+	}
+
+	tm->tm_sec = bcd2bin(buf[ABX8XX_REG_SC] & 0x7F);
+	tm->tm_min = bcd2bin(buf[ABX8XX_REG_MN] & 0x7F);
+	tm->tm_hour = bcd2bin(buf[ABX8XX_REG_HR] & 0x3F);
+	tm->tm_wday = buf[ABX8XX_REG_WD] & 0x7;
+	tm->tm_mday = bcd2bin(buf[ABX8XX_REG_DA] & 0x3F);
+	tm->tm_mon = bcd2bin(buf[ABX8XX_REG_MO] & 0x1F);
+	tm->tm_year = bcd2bin(buf[ABX8XX_REG_YR]) + 2000;
+
+	return 0;
+}
+
+static int abx80x_rtc_set_time(struct udevice *dev, const struct rtc_time *tm)
+{
+	unsigned char buf[8];
+	int err, flags;
+
+	if (tm->tm_year < 2000)
+		return -EINVAL;
+
+	buf[ABX8XX_REG_HTH] = 0;
+	buf[ABX8XX_REG_SC] = bin2bcd(tm->tm_sec);
+	buf[ABX8XX_REG_MN] = bin2bcd(tm->tm_min);
+	buf[ABX8XX_REG_HR] = bin2bcd(tm->tm_hour);
+	buf[ABX8XX_REG_DA] = bin2bcd(tm->tm_mday);
+	buf[ABX8XX_REG_MO] = bin2bcd(tm->tm_mon);
+	buf[ABX8XX_REG_YR] = bin2bcd(tm->tm_year - 2000);
+	buf[ABX8XX_REG_WD] = tm->tm_wday;
+
+	err = dm_i2c_write(dev, ABX8XX_REG_HTH,
+			   buf, sizeof(buf));
+	if (err < 0) {
+		log_err("Unable to write to date registers\n");
+		return -EIO;
+	}
+
+	/* Clear the OF bit of Oscillator Status Register */
+	flags = dm_i2c_reg_read(dev, ABX8XX_REG_OSS);
+	if (flags < 0) {
+		log_err("Unable to read oscillator status.\n");
+		return flags;
+	}
+
+	err = dm_i2c_reg_write(dev, ABX8XX_REG_OSS,
+			       flags & ~ABX8XX_OSS_OF);
+	if (err < 0) {
+		log_err("Unable to write oscillator status register\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int abx80x_rtc_set_autocalibration(struct udevice *dev,
+					  int autocalibration)
+{
+	int retval, flags = 0;
+
+	if (autocalibration != 0 && autocalibration != 1024 &&
+	    autocalibration != 512) {
+		log_err("autocalibration value outside permitted range\n");
+		return -EINVAL;
+	}
+
+	flags = dm_i2c_reg_read(dev, ABX8XX_REG_OSC);
+	if (flags < 0)
+		return flags;
+
+	if (autocalibration == 0) {
+		flags &= ~(ABX8XX_OSC_ACAL_512 | ABX8XX_OSC_ACAL_1024);
+	} else if (autocalibration == 1024) {
+		/* 1024 autocalibration is 0x10 */
+		flags |= ABX8XX_OSC_ACAL_1024;
+		flags &= ~(ABX8XX_OSC_ACAL_512);
+	} else {
+		/* 512 autocalibration is 0x11 */
+		flags |= (ABX8XX_OSC_ACAL_1024 | ABX8XX_OSC_ACAL_512);
+	}
+
+	/* Unlock write access to Oscillator Control Register */
+	retval = dm_i2c_reg_write(dev, ABX8XX_REG_CFG_KEY,
+				  ABX8XX_CFG_KEY_OSC);
+	if (retval < 0) {
+		log_err("Failed to write CONFIG_KEY register\n");
+		return retval;
+	}
+
+	retval = dm_i2c_reg_write(dev, ABX8XX_REG_OSC, flags);
+
+	return retval;
+}
+
+static int abx80x_rtc_get_autocalibration(struct udevice *dev)
+{
+	int flags = 0, autocalibration;
+
+	flags =  dm_i2c_reg_read(dev, ABX8XX_REG_OSC);
+	if (flags < 0)
+		return flags;
+
+	if (flags & ABX8XX_OSC_ACAL_512)
+		autocalibration = 512;
+	else if (flags & ABX8XX_OSC_ACAL_1024)
+		autocalibration = 1024;
+	else
+		autocalibration = 0;
+
+	return autocalibration;
+}
+
+static struct rtc_time default_tm = { 0, 0, 0, 1, 1, 2000, 6, 0, 0 };
+
+static int abx80x_rtc_reset(struct udevice *dev)
+{
+	int ret = 0;
+
+	int autocalib = abx80x_rtc_get_autocalibration(dev);
+
+	if (autocalib != 0)
+		abx80x_rtc_set_autocalibration(dev, 0);
+
+	ret = abx80x_rtc_set_time(dev, &default_tm);
+	if (ret != 0) {
+		log_err("cannot set time to default_tm. error %d\n", ret);
+		return ret;
+	}
+
+	return ret;
+}
+
+static const struct rtc_ops abx80x_rtc_ops = {
+	.get	= abx80x_rtc_read_time,
+	.set	= abx80x_rtc_set_time,
+	.reset  = abx80x_rtc_reset,
+	.read8  = abx80x_rtc_read8,
+	.write8 = abx80x_rtc_write8
+};
+
+static int abx80x_dt_trickle_cfg(struct udevice *dev)
+{
+	const char *diode;
+	int trickle_cfg = 0;
+	int i, ret = 0;
+	u32 tmp;
+
+	diode = ofnode_read_string(dev_ofnode(dev), "abracon,tc-diode");
+	if (!diode)
+		return ret;
+
+	if (!strcmp(diode, "standard")) {
+		trickle_cfg |= ABX8XX_TRICKLE_STANDARD_DIODE;
+	} else if (!strcmp(diode, "schottky")) {
+		trickle_cfg |= ABX8XX_TRICKLE_SCHOTTKY_DIODE;
+	} else {
+		log_err("Invalid tc-diode value: %s\n", diode);
+		return -EINVAL;
+	}
+
+	ret = ofnode_read_u32(dev_ofnode(dev), "abracon,tc-resistor", &tmp);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < sizeof(trickle_resistors); i++)
+		if (trickle_resistors[i] == tmp)
+			break;
+
+	if (i == sizeof(trickle_resistors)) {
+		log_err("Invalid tc-resistor value: %u\n", tmp);
+		return -EINVAL;
+	}
+
+	return (trickle_cfg | i);
+}
+
+static int abx80x_probe(struct udevice *dev)
+{
+	int i, data, err, trickle_cfg = -EINVAL;
+	unsigned char buf[7];
+	unsigned int part = dev->driver_data;
+	unsigned int partnumber;
+	unsigned int majrev, minrev;
+	unsigned int lot;
+	unsigned int wafer;
+	unsigned int uid;
+
+	err = dm_i2c_read(dev, ABX8XX_REG_ID0, buf, sizeof(buf));
+	if (err < 0) {
+		log_err("Unable to read partnumber\n");
+		return -EIO;
+	}
+
+	partnumber = (buf[0] << 8) | buf[1];
+	majrev = buf[2] >> 3;
+	minrev = buf[2] & 0x7;
+	lot = ((buf[4] & 0x80) << 2) | ((buf[6] & 0x80) << 1) | buf[3];
+	uid = ((buf[4] & 0x7f) << 8) | buf[5];
+	wafer = (buf[6] & 0x7c) >> 2;
+	log_debug("model %04x, revision %u.%u, lot %x, wafer %x, uid %x\n",
+		  partnumber, majrev, minrev, lot, wafer, uid);
+
+	data = dm_i2c_reg_read(dev, ABX8XX_REG_CTRL1);
+	if (data < 0) {
+		log_err("Unable to read control register\n");
+		return -EIO;
+	}
+
+	err = dm_i2c_reg_write(dev, ABX8XX_REG_CTRL1,
+			       ((data & ~(ABX8XX_CTRL_12_24 |
+					  ABX8XX_CTRL_ARST)) |
+				ABX8XX_CTRL_WRITE));
+	if (err < 0) {
+		log_err("Unable to write control register\n");
+		return -EIO;
+	}
+
+	/* Configure RV1805 specifics */
+	if (part == RV1805) {
+		/*
+		 * Avoid accidentally entering test mode. This can happen
+		 * on the RV1805 in case the reserved bit 5 in control2
+		 * register is set. RV-1805-C3 datasheet indicates that
+		 * the bit should be cleared in section 11h - Control2.
+		 */
+		data = dm_i2c_reg_read(dev, ABX8XX_REG_CTRL2);
+		if (data < 0) {
+			log_err("Unable to read control2 register\n");
+			return -EIO;
+		}
+
+		err = dm_i2c_reg_write(dev, ABX8XX_REG_CTRL2,
+				       data & ~ABX8XX_CTRL2_RSVD);
+		if (err < 0) {
+			log_err("Unable to write control2 register\n");
+			return -EIO;
+		}
+
+		/*
+		 * Avoid extra power leakage. The RV1805 uses smaller
+		 * 10pin package and the EXTI input is not present.
+		 * Disable it to avoid leakage.
+		 */
+		data = dm_i2c_reg_read(dev, ABX8XX_REG_OUT_CTRL);
+		if (data < 0) {
+			log_err("Unable to read output control register\n");
+			return -EIO;
+		}
+
+		/*
+		 * Write the configuration key register to enable access to
+		 * the config2 register
+		 */
+		err = dm_i2c_reg_write(dev, ABX8XX_REG_CFG_KEY,
+				       ABX8XX_CFG_KEY_MISC);
+		if (err < 0) {
+			log_err("Unable to write configuration key\n");
+			return -EIO;
+		}
+
+		err = dm_i2c_reg_write(dev, ABX8XX_REG_OUT_CTRL,
+				       data | ABX8XX_OUT_CTRL_EXDS);
+		if (err < 0) {
+			log_err("Unable to write output control register\n");
+			return -EIO;
+		}
+	}
+
+	/* part autodetection */
+	if (part == ABX80X) {
+		for (i = 0; abx80x_caps[i].pn; i++)
+			if (partnumber == abx80x_caps[i].pn)
+				break;
+		if (abx80x_caps[i].pn == 0) {
+			log_err("Unknown part: %04x\n", partnumber);
+			return -EINVAL;
+		}
+		part = i;
+	}
+
+	if (partnumber != abx80x_caps[part].pn) {
+		log_err("partnumber mismatch %04x != %04x\n",
+			partnumber, abx80x_caps[part].pn);
+		return -EINVAL;
+	}
+
+	if (abx80x_caps[part].has_tc)
+		trickle_cfg = abx80x_dt_trickle_cfg(dev);
+
+	if (trickle_cfg > 0) {
+		log_debug("Enabling trickle charger: %02x\n", trickle_cfg);
+		abx80x_enable_trickle_charger(dev, trickle_cfg);
+	}
+
+	err = dm_i2c_reg_write(dev, ABX8XX_REG_CD_TIMER_CTL, BIT(2));
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static const struct udevice_id abx80x_of_match[] = {
+	{
+		.compatible = "abracon,abx80x",
+		.data = ABX80X
+	},
+	{
+		.compatible = "abracon,ab0801",
+		.data = AB0801
+	},
+	{
+		.compatible = "abracon,ab0803",
+		.data = AB0803
+	},
+	{
+		.compatible = "abracon,ab0804",
+		.data = AB0804
+	},
+	{
+		.compatible = "abracon,ab0805",
+		.data = AB0805
+	},
+	{
+		.compatible = "abracon,ab1801",
+		.data = AB1801
+	},
+	{
+		.compatible = "abracon,ab1803",
+		.data = AB1803
+	},
+	{
+		.compatible = "abracon,ab1804",
+		.data = AB1804
+	},
+	{
+		.compatible = "abracon,ab1805",
+		.data = AB1805
+	},
+	{
+		.compatible = "microcrystal,rv1805",
+		.data = RV1805
+	},
+	{ }
+};
+
+U_BOOT_DRIVER(abx80x_rtc) = {
+	.name	= "rtc-abx80x",
+	.id     = UCLASS_RTC,
+	.probe		= abx80x_probe,
+	.of_match = abx80x_of_match,
+	.ops = &abx80x_rtc_ops,
+};
