staging: fsl-dpaa2/rtc: support phc_index of ethtool_ts_info

This patch is to support phc_index of ethtool_ts_info.
Also make the rtc drvier depend on FSL_DPAA2_ETH because
this driver is only useful when PTP programs are getting
hardware time stamps on the PTP Ethernet packets using the
SO_TIMESTAMPING API.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fsl-dpaa2/Kconfig

@@ -27,7 +27,7 @@ config FSL_DPAA2_ETHSW
 
 config FSL_DPAA2_PTP_CLOCK
 	tristate "Freescale DPAA2 PTP Clock"
-	depends on FSL_DPAA2
+	depends on FSL_DPAA2_ETH
 	select PTP_1588_CLOCK
 	help
 	  This driver adds support for using the DPAA2 1588 timer module

drivers/staging/fsl-dpaa2/rtc/rtc.c

@@ -9,14 +9,12 @@
 #include <linux/ptp_clock_kernel.h>
 #include <linux/fsl/mc.h>
 
-#include "dprtc.h"
-#include "dprtc-cmd.h"
+#include "rtc.h"
 
 struct ptp_dpaa2_priv {
 	struct fsl_mc_device *rtc_mc_dev;
 	struct ptp_clock *clock;
 	struct ptp_clock_info caps;
-	int phc_index;
 	u32 freq_comp;
 };
 
@@ -173,7 +171,7 @@ static int rtc_probe(struct fsl_mc_device *mc_dev)
 		goto err_close;
 	}
 
-	ptp_dpaa2->phc_index = ptp_clock_index(ptp_dpaa2->clock);
+	dpaa2_phc_index = ptp_clock_index(ptp_dpaa2->clock);
 
 	dev_set_drvdata(dev, ptp_dpaa2);
 

drivers/staging/fsl-dpaa2/rtc/rtc.h

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2018 NXP
+ */
+
+#ifndef __RTC_H
+#define __RTC_H
+
+#include "dprtc.h"
+#include "dprtc-cmd.h"
+
+extern int dpaa2_phc_index;
+
+#endif