--- zzzz-none-000/linux-3.10.107/drivers/i2c/busses/i2c-designware-core.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/drivers/i2c/busses/i2c-designware-core.c	2021-11-10 11:53:55.000000000 +0000
@@ -25,6 +25,14 @@
  * ----------------------------------------------------------------------------
  *
  */
+ 
+ 
+/**
+ * Some part of this file is modified by Ikanos Communications. 
+ *
+ * Copyright (C) 2013-2014 Ikanos Communications.
+ */ 
+  
 #include <linux/export.h>
 #include <linux/clk.h>
 #include <linux/errno.h>
@@ -140,6 +148,12 @@
 					 DW_IC_TX_ABRT_TXDATA_NOACK | \
 					 DW_IC_TX_ABRT_GCALL_NOACK)
 
+#ifdef CONFIG_FUSIV_VX585
+/*IKANOS: adding I2C for vx585*/
+#define VX585_I2C_BASE_ADDR	0xB9070000
+#define FUSIV_I2C_DEBUG 0
+#endif
+
 static char *abort_sources[] = {
 	[ABRT_7B_ADDR_NOACK] =
 		"slave address not acknowledged (7bit mode)",
@@ -168,7 +182,9 @@
 u32 dw_readl(struct dw_i2c_dev *dev, int offset)
 {
 	u32 value;
-
+#ifdef CONFIG_FUSIV_VX585
+	value = *(volatile u32 *)(VX585_I2C_BASE_ADDR + offset);
+#else
 	if (dev->accessor_flags & ACCESS_16BIT)
 		value = readw(dev->base + offset) |
 			(readw(dev->base + offset + 2) << 16);
@@ -178,11 +194,15 @@
 	if (dev->accessor_flags & ACCESS_SWAP)
 		return swab32(value);
 	else
+#endif
 		return value;
 }
 
 void dw_writel(struct dw_i2c_dev *dev, u32 b, int offset)
 {
+#ifdef CONFIG_FUSIV_VX585
+	*(volatile u32 *)(VX585_I2C_BASE_ADDR + offset) = b;
+#else
 	if (dev->accessor_flags & ACCESS_SWAP)
 		b = swab32(b);
 
@@ -192,6 +212,8 @@
 	} else {
 		writel(b, dev->base + offset);
 	}
+
+#endif
 }
 
 static u32
@@ -284,7 +306,11 @@
 	u32 hcnt, lcnt;
 	u32 reg;
 
+#ifdef CONFIG_FUSIV_VX585 
+	input_clock_khz = 300 * 1000; 
+#else						
 	input_clock_khz = dev->get_clk_rate_khz(dev);
+#endif
 
 	reg = dw_readl(dev, DW_IC_COMP_TYPE);
 	if (reg == ___constant_swab32(DW_IC_COMP_TYPE_VALUE)) {