[PATCH 3/5] net: ethernet: gianfar_ethtool: get phc index through drvdata

[Yangbo Lu]

Global variable gfar_phc_index was used to get and store
phc index through gianfar_ptp driver. However gianfar_ptp
had been renamed as ptp_qoriq for QorIQ common PTP driver.
This gfar_phc_index doesn't work any more, and the phc index
is stored in drvdata now. This patch is to support getting
phc index through ptp_qoriq drvdata.

Signed-off-by: Yangbo Lu <yangbo...@nxp.com>
---
 drivers/net/ethernet/freescale/gianfar.h         |    3 --
 drivers/net/ethernet/freescale/gianfar_ethtool.c |   23 +++++++++++++++++----
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/freescale/gianfar.h 
b/drivers/net/ethernet/freescale/gianfar.h
index 5aa8147..8e42c02 100644
--- a/drivers/net/ethernet/freescale/gianfar.h
+++ b/drivers/net/ethernet/freescale/gianfar.h
@@ -1372,7 +1372,4 @@ struct filer_table {
        struct gfar_filer_entry fe[MAX_FILER_CACHE_IDX + 20];
 };
 
-/* The gianfar_ptp module will set this variable */
-extern int gfar_phc_index;
-
 #endif /* __GIANFAR_H */
diff --git a/drivers/net/ethernet/freescale/gianfar_ethtool.c 
b/drivers/net/ethernet/freescale/gianfar_ethtool.c
index a93e019..8cb98ca 100644
--- a/drivers/net/ethernet/freescale/gianfar_ethtool.c
+++ b/drivers/net/ethernet/freescale/gianfar_ethtool.c
@@ -41,6 +41,8 @@
 #include <linux/phy.h>
 #include <linux/sort.h>
 #include <linux/if_vlan.h>
+#include <linux/of_platform.h>
+#include <linux/fsl/ptp_qoriq.h>
 
 #include "gianfar.h"
 
@@ -1509,24 +1511,35 @@ static int gfar_get_nfc(struct net_device *dev, struct 
ethtool_rxnfc *cmd,
        return ret;
 }
 
-int gfar_phc_index = -1;
-EXPORT_SYMBOL(gfar_phc_index);
-
 static int gfar_get_ts_info(struct net_device *dev,
                            struct ethtool_ts_info *info)
 {
        struct gfar_private *priv = netdev_priv(dev);
+       struct platform_device *ptp_dev;
+       struct device_node *ptp_node;
+       struct qoriq_ptp *ptp = NULL;
+
+       info->phc_index = -1;
 
        if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) {
                info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
                                        SOF_TIMESTAMPING_SOFTWARE;
-               info->phc_index = -1;
                return 0;
        }
+
+       ptp_node = of_find_compatible_node(NULL, NULL, "fsl,etsec-ptp");
+       if (ptp_node) {
+               ptp_dev = of_find_device_by_node(ptp_node);
+               if (ptp_dev)
+                       ptp = platform_get_drvdata(ptp_dev);
+       }
+
+       if (ptp)
+               info->phc_index = ptp->phc_index;
+
        info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
                                SOF_TIMESTAMPING_RX_HARDWARE |
                                SOF_TIMESTAMPING_RAW_HARDWARE;
-       info->phc_index = gfar_phc_index;
        info->tx_types = (1 << HWTSTAMP_TX_OFF) |
                         (1 << HWTSTAMP_TX_ON);
        info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
-- 
1.7.1