v4.19.13 snapshot.
diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h
new file mode 100644
index 0000000..472fa4d
--- /dev/null
+++ b/include/linux/micrel_phy.h
@@ -0,0 +1,51 @@
+/*
+ * include/linux/micrel_phy.h
+ *
+ * Micrel PHY IDs
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#ifndef _MICREL_PHY_H
+#define _MICREL_PHY_H
+
+#define MICREL_PHY_ID_MASK 0x00fffff0
+
+#define PHY_ID_KSZ8873MLL 0x000e7237
+#define PHY_ID_KSZ9021 0x00221610
+#define PHY_ID_KSZ9021RLRN 0x00221611
+#define PHY_ID_KS8737 0x00221720
+#define PHY_ID_KSZ8021 0x00221555
+#define PHY_ID_KSZ8031 0x00221556
+#define PHY_ID_KSZ8041 0x00221510
+/* undocumented */
+#define PHY_ID_KSZ8041RNLI 0x00221537
+#define PHY_ID_KSZ8051 0x00221550
+/* same id: ks8001 Rev. A/B, and ks8721 Rev 3. */
+#define PHY_ID_KSZ8001 0x0022161A
+/* same id: KS8081, KS8091 */
+#define PHY_ID_KSZ8081 0x00221560
+#define PHY_ID_KSZ8061 0x00221570
+#define PHY_ID_KSZ9031 0x00221620
+
+#define PHY_ID_KSZ886X 0x00221430
+#define PHY_ID_KSZ8863 0x00221435
+
+#define PHY_ID_KSZ8795 0x00221550
+
+#define PHY_ID_KSZ9477 0x00221631
+
+/* struct phy_device dev_flags definitions */
+#define MICREL_PHY_50MHZ_CLK 0x00000001
+#define MICREL_PHY_FXEN 0x00000002
+
+#define MICREL_KSZ9021_EXTREG_CTRL 0xB
+#define MICREL_KSZ9021_EXTREG_DATA_WRITE 0xC
+#define MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW 0x104
+#define MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW 0x105
+
+#endif /* _MICREL_PHY_H */