Add PPID and other hwinfo for lshw package (1/2)

Change-Id: I4cb3486d191f644108bb99cfb26e21573c6f8c1a
Reviewed-on: https://tp-biosrd-v02/gerrit/80794
Reviewed-by: Alex Cheng(鄭富元) <Alex_Cheng@asus.com>
Tested-by: Alex Cheng(鄭富元) <Alex_Cheng@asus.com>

Author: Yaojen_Chang

arch/arm/boot/dts/rk3288-miniarm.dts

@@ -44,6 +44,9 @@
 
 / {
 	compatible = "rockchip,rk3288-miniarm", "rockchip,rk3288";
+        model = "Tinker Board";
+        copyright = "ASUS";
+        system-id = "                                "; /*For ASUS PPID*/
 
 	ion {
 		compatible = "rockchip,ion";

drivers/of/base.c

@@ -54,6 +54,17 @@ DEFINE_MUTEX(of_mutex);
  */
 DEFINE_RAW_SPINLOCK(devtree_lock);
 
+/*------------------ For ASUS write system-id---------------------*/
+static ssize_t asus_write_systemid(struct file *filp, struct kobject *kobj,
+                            struct bin_attribute *bin_attr, char *buf,
+                            loff_t offset, size_t count)
+{
+        struct property *pp = container_of(bin_attr, struct property, attr);
+        sscanf(buf, "%s", (char *)pp->value);
+        return count;
+}
+/*----------------------------------------------------------------*/
+
 int of_n_addr_cells(struct device_node *np)
 {
 	const __be32 *ip;
@@ -151,9 +162,16 @@ int __of_add_property_sysfs(struct device_node *np, struct property *pp)
 
 	sysfs_bin_attr_init(&pp->attr);
 	pp->attr.attr.name = safe_name(&np->kobj, pp->name);
+        //For ASUS PPID (system-id)
+        if (!(strcmp(pp->attr.attr.name, "system-id"))) {
+            pp->attr.attr.mode = S_IRUGO|S_IWUSR;
+            pp->attr.read = of_node_property_read;
+            pp->attr.write = asus_write_systemid;
+        } else {
 	pp->attr.attr.mode = secure ? S_IRUSR : S_IRUGO;
 	pp->attr.size = secure ? 0 : pp->length;
 	pp->attr.read = of_node_property_read;
+        }
 
 	rc = sysfs_create_bin_file(&np->kobj, &pp->attr);
 	WARN(rc, "error adding attribute %s to node %s\n", pp->name, np->full_name);