Adding sysfs and DT suppport for the ported program

src/arch/arm/boot/dts/elphel393_1_mt9p006.dts

@@ -299,5 +299,15 @@
         klogger-393,buffer_size = <1048576>; 
     } ;
     
+/* i2c driver for the extension boards, such as imu, gps, etc */    
+    elphel393_ext_i2c:elphel393-ext-i2c@0{
+        compatible =    "elphel,elphel393-ext-i2c-1.00";
+        time_scl_high =     <3>; /*  SCL high duration (us) */
+        time_scl_low =      <3>; /*  SCL low duration (us) */
+        time_slave2master = <2>; /*  slave -> master delay (us) */
+        time_master2slave = <2>; /*  master -> slave delay (us) */
+        filter_sda =        <7>; /*  filter SDA read data by testing multiple times - currently just zero/non zero  */
+        filter_scl =        <7>; /* filter SCL read data by testing multiple times - currently just zero/non zero  */
+    };
     
 };
\ No newline at end of file

src/arch/arm/boot/dts/elphel393_4_mt9p006.dts

@@ -298,6 +298,15 @@
         compatible = "elphel,klogger-393-1.00";
         klogger-393,buffer_size = <1048576>; 
     } ;
-    
+/* i2c driver for the extension boards, such as imu, gps, etc */    
+    elphel393_ext_i2c:elphel393-ext-i2c@0{
+        compatible =    "elphel,elphel393-ext-i2c-1.00";
+        time_scl_high =     <3>; /*  SCL high duration (us) */
+        time_scl_low =      <3>; /*  SCL low duration (us) */
+        time_slave2master = <2>; /*  slave -> master delay (us) */
+        time_master2slave = <2>; /*  master -> slave delay (us) */
+        filter_sda =        <7>; /*  filter SDA read data by testing multiple times - currently just zero/non zero  */
+        filter_scl =        <7>; /* filter SCL read data by testing multiple times - currently just zero/non zero  */
+    };
     
 };
\ No newline at end of file

src/arch/arm/boot/dts/elphel393_eyesis.dts

@@ -299,5 +299,15 @@
         klogger-393,buffer_size = <1048576>; 
     } ;
     
+/* i2c driver for the extension boards, such as imu, gps, etc */    
+    elphel393_ext_i2c:elphel393-ext-i2c@0{
+        compatible =    "elphel,elphel393-ext-i2c-1.00";
+        time_scl_high =     <3>; /*  SCL high duration (us) */
+        time_scl_low =      <3>; /*  SCL low duration (us) */
+        time_slave2master = <2>; /*  slave -> master delay (us) */
+        time_master2slave = <2>; /*  master -> slave delay (us) */
+        filter_sda =        <7>; /*  filter SDA read data by testing multiple times - currently just zero/non zero  */
+        filter_scl =        <7>; /* filter SCL read data by testing multiple times - currently just zero/non zero  */
+    };
     
 };
\ No newline at end of file

src/arch/arm/boot/dts/elphel393_eyesis_bottom2.dts

@@ -299,5 +299,15 @@
         klogger-393,buffer_size = <1048576>; 
     } ;
     
+/* i2c driver for the extension boards, such as imu, gps, etc */    
+    elphel393_ext_i2c:elphel393-ext-i2c@0{
+        compatible =    "elphel,elphel393-ext-i2c-1.00";
+        time_scl_high =     <3>; /*  SCL high duration (us) */
+        time_scl_low =      <3>; /*  SCL low duration (us) */
+        time_slave2master = <2>; /*  slave -> master delay (us) */
+        time_master2slave = <2>; /*  master -> slave delay (us) */
+        filter_sda =        <7>; /*  filter SDA read data by testing multiple times - currently just zero/non zero  */
+        filter_scl =        <7>; /* filter SCL read data by testing multiple times - currently just zero/non zero  */
+    };
     
 };
\ No newline at end of file

src/drivers/elphel/detect_sensors.c

@@ -246,7 +246,6 @@ static int get_channel_sub_from_name(struct device_attribute *attr) ///< Linux k
 
 static ssize_t show_port_mux(struct device *dev, struct device_attribute *attr, char *buf)
 {
-    int i;
     const char * name = get_name_by_code(get_detected_mux_code(get_channel_from_name(attr)), DETECT_MUX);
     if (name) return sprintf(buf,"%s\n", name);
     // Should never get here
@@ -254,7 +253,6 @@ static ssize_t show_port_mux(struct device *dev, struct device_attribute *attr,
 }
 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, char *buf)
 {
-    int i;
     int psch = get_channel_sub_from_name(attr);
     int port = (psch>>4) &3;
     int sub_chn = psch &3;
@@ -265,11 +263,11 @@ static ssize_t show_sensor(struct device *dev, struct device_attribute *attr, ch
 }
 static ssize_t store_port_mux(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
-    size_t len;
+//    size_t len;
     char name[80];
     int port = get_channel_from_name(attr);
-    int i, code, rslt;
-    if (sscanf(buf, "%79s", name, &len)){
+    int rslt;
+    if (sscanf(buf, "%79s", name)){
         if ((rslt = set_detected_mux_code( port, get_code_by_name(name, DETECT_MUX)))<0)
             return rslt;
 
@@ -278,13 +276,13 @@ static ssize_t store_port_mux(struct device *dev, struct device_attribute *attr,
 }
 static ssize_t store_sensor(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
-    size_t len;
+//    size_t len;
     char name[80];
     int psch = get_channel_sub_from_name(attr);
     int port = (psch>>4) &3;
     int sub_chn = psch &3;
-    int i, rslt;
-    if (sscanf(buf, "%79s", name, &len)){
+    int rslt;
+    if (sscanf(buf, "%79s", name)){
         if ((rslt = set_detected_sensor_code(port, sub_chn, get_code_by_name(name, DETECT_SENSOR)))<0)
             return rslt;
     }

src/drivers/elphel/sensor_i2c.c

@@ -44,7 +44,6 @@
 #include <linux/of.h>
 #include <linux/of_fdt.h>
 #include <linux/of_net.h>
-#include <linux/platform_device.h>
 #include <linux/sysfs.h>
 #include <linux/list.h>