netdev: bfin_mac: add support for IEEE 1588 PTP

Newer on-chip MAC peripherals support IEEE 1588 PTP in the hardware, so
extend the driver to support this functionality.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/Kconfig

@@ -887,6 +887,13 @@ config BFIN_MAC_RMII
 	help
 	  Use Reduced PHY MII Interface
 
+config BFIN_MAC_USE_HWSTAMP
+	bool "Use IEEE 1588 hwstamp"
+	depends on BFIN_MAC && BF518
+	default y
+	help
+	  To support the IEEE 1588 Precision Time Protocol (PTP), select y here
+
 config SMC9194
 	tristate "SMC 9194 support"
 	depends on NET_VENDOR_SMC && (ISA || MAC && BROKEN)

drivers/net/bfin_mac.h

@@ -7,6 +7,12 @@
  *
  * Licensed under the GPL-2 or later.
  */
+#ifndef _BFIN_MAC_H_
+#define _BFIN_MAC_H_
+
+#include <linux/net_tstamp.h>
+#include <linux/clocksource.h>
+#include <linux/timecompare.h>
 
 #define BFIN_MAC_CSUM_OFFLOAD
 
@@ -67,6 +73,15 @@ struct bfin_mac_local {
 
 	struct phy_device *phydev;
 	struct mii_bus *mii_bus;
+
+#if defined(CONFIG_BFIN_MAC_USE_HWSTAMP)
+	struct cyclecounter cycles;
+	struct timecounter clock;
+	struct timecompare compare;
+	struct hwtstamp_config stamp_cfg;
+#endif
 };
 
 extern void bfin_get_ether_addr(char *addr);
+
+#endif