Index: firmware/target/arm/i2c-pp.c
===================================================================
--- firmware/target/arm/i2c-pp.c	(revision 16006)
+++ firmware/target/arm/i2c-pp.c	(working copy)
@@ -148,11 +148,13 @@
     unsigned int temp;
     int i;
     mutex_lock(&i2c_mtx);
+    DEV_EN |= DEV_I2C;
     pp_i2c_send_byte(dev_addr, addr);
     for (i = 0; i < len; i++) {
         pp_i2c_read_byte(dev_addr, &temp);
         data[i] = temp;
     }
+    DEV_EN &= ~DEV_I2C;
     mutex_unlock(&i2c_mtx);
     return i;
 }
@@ -162,8 +164,10 @@
     int data;
 
     mutex_lock(&i2c_mtx);
+    DEV_EN |= DEV_I2C;
     pp_i2c_send_byte(dev_addr, addr);
     pp_i2c_read_byte(dev_addr, &data);
+    DEV_EN &= ~DEV_I2C;
     mutex_unlock(&i2c_mtx);
 
     return data;
@@ -178,7 +182,9 @@
     data[1] = data1;
 
     mutex_lock(&i2c_mtx);
+    DEV_EN |= DEV_I2C;
     retval = pp_i2c_send_bytes(addr, 2, data);
+    DEV_EN &= ~DEV_I2C;
     mutex_unlock(&i2c_mtx);
 
     return retval;
@@ -234,4 +240,6 @@
     mutex_init(&i2c_mtx);
 
     i2c_readbyte(0x8, 0);
+    
+    DEV_EN &= ~DEV_I2C;
 }