net: phy: Add new read ethernet phy id function
Add new function to get ethernet phy id from compatible property
of the mdio phy node.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Link: https://lore.kernel.org/r/16019efb3820a50330935fdaae191cec1f101b5c.1645627539.git.michal.simek@xilinx.com
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index 709bea2..8042847 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -898,6 +898,42 @@
return -ENOENT;
}
+int ofnode_read_eth_phy_id(ofnode node, u16 *vendor, u16 *device)
+{
+ const char *list, *end;
+ int len;
+
+ list = ofnode_get_property(node, "compatible", &len);
+
+ if (!list)
+ return -ENOENT;
+
+ end = list + len;
+ while (list < end) {
+ len = strlen(list);
+
+ if (len >= strlen("ethernet-phy-idVVVV,DDDD")) {
+ char *s = strstr(list, "ethernet-phy-id");
+
+ /*
+ * check if the string is something like
+ * ethernet-phy-idVVVV,DDDD
+ */
+ if (s && s[19] == '.') {
+ s += strlen("ethernet-phy-id");
+ *vendor = simple_strtol(s, NULL, 16);
+ s += 5;
+ *device = simple_strtol(s, NULL, 16);
+
+ return 0;
+ }
+ }
+ list += (len + 1);
+ }
+
+ return -ENOENT;
+}
+
int ofnode_read_addr_cells(ofnode node)
{
if (ofnode_is_np(node)) {