diff --git a/src/drivers/i2c/rx6110sa/chip.h b/src/drivers/i2c/rx6110sa/chip.h
index b90a52963b..76db780f9a 100644
--- a/src/drivers/i2c/rx6110sa/chip.h
+++ b/src/drivers/i2c/rx6110sa/chip.h
@@ -23,4 +23,17 @@ struct drivers_i2c_rx6110sa_config {
 	unsigned char user_year;	/* User year to set */
 	unsigned char set_user_date;	/* Use user date from device tree */
 	unsigned char cof_selection;	/* Set up "clock out" frequency */
+	unsigned char timer_clk;	/* Set up timer clock */
+	unsigned char timer_irq_en;	/* Interrupt generation on timer */
+	unsigned short timer_preset;	/* Preset value for the timer */
+	unsigned char timer_mode;	/* Set the timer mode of operation */
+	unsigned char timer_en;		/* Enable timer operation */
+	unsigned char irq_output_pin;	/* 0: IRQ2 pin used, 1: IRQ1 pin used */
+	unsigned char fout_output_pin;	/* 0: IRQ2, 1: IRQ1, 2: DO/FOUT */
+	unsigned char enable_1hz_out;	/* If set enables 1 Hz output on IRQ1 */
+	unsigned char pmon_sampling;	/* Select power monitor sampling time */
+	/* The following two bits set the power monitor and backup mode. */
+	unsigned char bks_on;
+	unsigned char bks_off;
+	unsigned char iocut_en;		/* Disable backup of I/O circuit. */
 };
diff --git a/src/drivers/i2c/rx6110sa/rx6110sa.c b/src/drivers/i2c/rx6110sa/rx6110sa.c
index 9d60bdb7e1..06735a7868 100644
--- a/src/drivers/i2c/rx6110sa/rx6110sa.c
+++ b/src/drivers/i2c/rx6110sa/rx6110sa.c
@@ -88,33 +88,54 @@ static void rx6110sa_init(struct device *dev)
 	struct drivers_i2c_rx6110sa_config *config = dev->chip_info;
 	uint8_t reg;
 
-	/* Do a dummy read first. */
-	reg = rx6110sa_read(dev, SECOND_REG);
-
+	/* Do a dummy read first as requested in the datasheet. */
+	rx6110sa_read(dev, SECOND_REG);
+	/*
+	 * Set battery backup mode and power monitor sampling time even if there
+	 * was no power loss to make sure that the right mode is used as it
+	 * directly influences the backup current consumption and therefore the
+	 * backup time.
+	 */
+	reg = (config->pmon_sampling & PMON_SAMPL_MASK) |
+		(!!config->bks_off << 2) | (!!config->bks_on << 3) |
+		(!!config->iocut_en << 4);
+	rx6110sa_write(dev, BATTERY_BACKUP_REG, reg);
 	/*
 	 * Check VLF-bit which indicates the RTC data loss, such as due to a
 	 * supply voltage drop.
 	 */
 	reg = rx6110sa_read(dev, FLAG_REGISTER);
-
 	if (!(reg & VLF_BIT))
 		/* No voltage low detected, everything is well. */
 		return;
-
 	/*
 	 * Voltage low detected, initialize RX6110 SA again.
 	 * Set first some registers to known state.
 	 */
-	rx6110sa_write(dev, BATTERY_BACKUP_REG, 0x00);
 	rx6110sa_write(dev, RESERVED_BIT_REG, RTC_INIT_VALUE);
 	rx6110sa_write(dev, DIGITAL_REG, 0x00);
-	rx6110sa_write(dev, IRQ_CONTROL_REG, 0x00);
+	reg = (!!config->enable_1hz_out << 4) |
+		(!!config->irq_output_pin << 2) |
+		(config->fout_output_pin & FOUT_OUTPUT_PIN_MASK);
+	rx6110sa_write(dev, IRQ_CONTROL_REG, reg);
 
 	/* Clear timer enable bit and set frequency of clock output. */
-
 	reg = rx6110sa_read(dev, EXTENSION_REG);
 	reg &= ~(FSEL_MASK | TE_BIT);
 	reg |= (config->cof_selection << 6);
+	if (config->timer_preset) {
+		/* Timer needs to be in stop mode prior to programming it. */
+		rx6110sa_write(dev, EXTENSION_REG, reg);
+		reg &= ~TSEL_MASK;
+		/* Program the timer preset value. */
+		rx6110sa_write(dev, TMR_COUNTER_0_REG,
+				config->timer_preset & 0xff);
+		rx6110sa_write(dev, TMR_COUNTER_1_REG,
+				(config->timer_preset >> 8) & 0xff);
+		/* Set Timer Enable bit and the timer clock value. */
+		reg |= ((!!config->timer_en << 4) |
+			(config->timer_clk & TSEL_MASK));
+	}
 	rx6110sa_write(dev, EXTENSION_REG, reg);
 
 	/* Clear voltage low detect bit. */
@@ -140,7 +161,9 @@ static void rx6110sa_init(struct device *dev)
 	rx6110sa_write(dev, MINUTE_REG, 0);
 	rx6110sa_write(dev, SECOND_REG, 0);
 	/* Start oscillator again as the RTC is set up now. */
-	rx6110sa_write(dev, CTRL_REG, 0x00);
+	reg = (!!config->timer_irq_en << 4) |
+		(config->timer_mode & TMR_MODE_MASK);
+	rx6110sa_write(dev, CTRL_REG, reg);
 }
 
 static struct device_operations rx6110sa_ops = {
diff --git a/src/drivers/i2c/rx6110sa/rx6110sa.h b/src/drivers/i2c/rx6110sa/rx6110sa.h
index 99527e0420..ebd75ead60 100644
--- a/src/drivers/i2c/rx6110sa/rx6110sa.h
+++ b/src/drivers/i2c/rx6110sa/rx6110sa.h
@@ -38,6 +38,7 @@
 #define EXTENSION_REG			0x1D
 #define  TE_BIT				(1 << 4)
 #define  FSEL_MASK			0xC0
+#define  TSEL_MASK			0x07
 #define FLAG_REGISTER			0x1E
 #define  VLF_BIT			(1 << 1)
 #define CTRL_REG			0x1F
@@ -46,9 +47,15 @@
 #define  UIE_BIT			(1 << 5)
 #define  STOP_BIT			(1 << 6)
 #define  TEST_BIT			(1 << 7)
+#define  TMR_MODE_MASK			0x03
+#define  TMR_MODE_NORM_BACKUP		0x00
+#define  TMR_MODE_NORM_ONLY		0x01
+#define  TMR_MODE_BACKUP_ONLY		0x03
 #define DIGITAL_REG			0x30
 #define BATTERY_BACKUP_REG		0x31
+#define  PMON_SAMPL_MASK		0x03
 #define IRQ_CONTROL_REG			0x32
+#define  FOUT_OUTPUT_PIN_MASK		0x03
 
 /* Define CLKOUT frequency divider values valid for parameter cof_selection */
 #define COF_OFF				0x00
@@ -56,4 +63,26 @@
 #define COF_1024_HZ			0x02
 #define COF_32768_HZ			0x03
 
+/* Define valid clock rates for the internal timer */
+#define TMR_CLK_4096_HZ			0x00
+#define TMR_CLK_64_HZ			0x01
+#define TMR_CLK_1_HZ			0x02
+#define TMR_CLK_1_60_HZ			0x03
+#define TMR_CLK_1_3600_HZ		0x04
+
+/*
+ * Define possible power monitor sampling times. This value decides for how
+ * long the power supply is sampled every second to detect a power down
+ * condition.
+ */
+#define PMON_SAMPL_2_MS			0x00
+#define PMON_SAMPL_16_MS		0x01
+#define PMON_SAMPL_128_MS		0x02
+#define PMON_SAMPL_256_MS		0x03
+
+/* Define on which pin of the RTC the generated square wave will be driven. */
+#define  FOUT_IRQ2			0x00	/* IRQ2 pin used for Fout */
+#define  FOUT_IRQ1			0x01	/* IRQ1 pin used for Fout */
+#define  FOUT_DO_FOUT			0x02	/* DO/FOUT pin used for Fout */
+
 #endif /* _I2C_RX6110SA_H_ */