diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
index 7fd7fa2..5199b0c 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
@@ -14,6 +14,12 @@ Optional properties :
  - i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds.
    This option is only supported in hardware blocks version 1.11a or newer.
 
+ - i2c-scl-falling-time : should contain the SCL falling time in nanoseconds.
+   This value which is by default 300ns is used to compute the tLOW period.
+
+ - i2c-sda-falling-time : should contain the SDA falling time in nanoseconds.
+   This value which is by default 300ns is used to compute the tHIGH period.
+
 Example :
 
 	i2c@f0000 {
@@ -34,4 +40,6 @@ Example :
 		interrupts = <12 1>;
 		clock-frequency = <400000>;
 		i2c-sda-hold-time-ns = <300>;
+		i2c-sda-falling-time-ns = <300>;
+		i2c-scl-falling-time-ns = <300>;
 	};
diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c
index 3525fc7..50c35f9 100644
--- a/drivers/i2c/busses/i2c-designware-core.c
+++ b/drivers/i2c/busses/i2c-designware-core.c
@@ -217,7 +217,7 @@ i2c_dw_scl_hcnt(u32 ic_clk, u32 tSYMBOL, u32 tf, int cond, int offset)
 		 *
 		 * If your hardware is free from tHD;STA issue, try this one.
 		 */
-		return (ic_clk * tSYMBOL + 5000) / 10000 - 8 + offset;
+		return (ic_clk * tSYMBOL + 500000) / 1000000 - 8 + offset;
 	else
 		/*
 		 * Conditional expression:
@@ -233,7 +233,8 @@ i2c_dw_scl_hcnt(u32 ic_clk, u32 tSYMBOL, u32 tf, int cond, int offset)
 		 * The reason why we need to take into account "tf" here,
 		 * is the same as described in i2c_dw_scl_lcnt().
 		 */
-		return (ic_clk * (tSYMBOL + tf) + 5000) / 10000 - 3 + offset;
+		return (ic_clk * (tSYMBOL + tf) + 500000) / 1000000
+			- 3 + offset;
 }
 
 static u32 i2c_dw_scl_lcnt(u32 ic_clk, u32 tLOW, u32 tf, int offset)
@@ -249,7 +250,7 @@ static u32 i2c_dw_scl_lcnt(u32 ic_clk, u32 tLOW, u32 tf, int offset)
 	 * account the fall time of SCL signal (tf).  Default tf value
 	 * should be 0.3 us, for safety.
 	 */
-	return ((ic_clk * (tLOW + tf) + 5000) / 10000) - 1 + offset;
+	return ((ic_clk * (tLOW + tf) + 500000) / 1000000) - 1 + offset;
 }
 
 static void __i2c_dw_enable(struct dw_i2c_dev *dev, bool enable)
@@ -286,6 +287,7 @@ int i2c_dw_init(struct dw_i2c_dev *dev)
 	u32 input_clock_khz;
 	u32 hcnt, lcnt;
 	u32 reg;
+	u32 sda_falling_time, scl_falling_time;
 
 	input_clock_khz = dev->get_clk_rate_khz(dev);
 
@@ -307,15 +309,25 @@ int i2c_dw_init(struct dw_i2c_dev *dev)
 
 	/* set standard and fast speed deviders for high/low periods */
 
+	if (dev->sda_falling_time)
+		sda_falling_time = dev->sda_falling_time;
+	else
+		sda_falling_time = 300; /* ns */
+
+	if (dev->scl_falling_time)
+		scl_falling_time = dev->scl_falling_time;
+	else
+		scl_falling_time = 300; /* ns */
+
 	/* Standard-mode */
 	hcnt = i2c_dw_scl_hcnt(input_clock_khz,
-				40,	/* tHD;STA = tHIGH = 4.0 us */
-				3,	/* tf = 0.3 us */
+				4000,	/* tHD;STA = tHIGH = 4.0 us */
+				sda_falling_time,
 				0,	/* 0: DW default, 1: Ideal */
 				0);	/* No offset */
 	lcnt = i2c_dw_scl_lcnt(input_clock_khz,
-				47,	/* tLOW = 4.7 us */
-				3,	/* tf = 0.3 us */
+				4700,	/* tLOW = 4.7 us */
+				scl_falling_time,
 				0);	/* No offset */
 
 	/* Allow platforms to specify the ideal HCNT and LCNT values */
@@ -323,13 +335,13 @@ int i2c_dw_init(struct dw_i2c_dev *dev)
 
 	/* Fast-mode */
 	hcnt = i2c_dw_scl_hcnt(input_clock_khz,
-				6,	/* tHD;STA = tHIGH = 0.6 us */
-				3,	/* tf = 0.3 us */
+				600,	/* tHD;STA = tHIGH = 0.6 us */
+				sda_falling_time,
 				0,	/* 0: DW default, 1: Ideal */
 				0);	/* No offset */
 	lcnt = i2c_dw_scl_lcnt(input_clock_khz,
-				13,	/* tLOW = 1.3 us */
-				3,	/* tf = 0.3 us */
+				1300,	/* tLOW = 1.3 us */
+				scl_falling_time,
 				0);	/* No offset */
 
 	if (dev->fs_hcnt && dev->fs_lcnt) {
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 912aa22..8b9397e 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -91,6 +91,8 @@ struct dw_i2c_dev {
 	unsigned int		rx_fifo_depth;
 	int			rx_outstanding;
 	u32			sda_hold_time;
+	u32			sda_falling_time;
+	u32			scl_falling_time;
 	u16			ss_hcnt;
 	u16			ss_lcnt;
 	u16			fs_hcnt;
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 8b9d3f1..0d6fe47 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -129,6 +129,13 @@ static int dw_i2c_probe(struct platform_device *pdev)
 					"i2c-sda-hold-time-ns", &ht);
 		dev->sda_hold_time = div_u64((u64)ic_clk * ht + 500000,
 					     1000000);
+
+		of_property_read_u32(pdev->dev.of_node,
+				     "i2c-sda-falling-time-ns",
+				     &dev->sda_falling_time);
+		of_property_read_u32(pdev->dev.of_node,
+				     "i2c-scl-falling-time-ns",
+				     &dev->scl_falling_time);
 	}
 
 	dev->functionality =
