gianfar: Implement the SIOCGHWTSTAMP ioctl

This is untested.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 18 insertions, 4 deletions

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index b14d7904a075..365342d293e8 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -795,8 +795,7 @@ err_grp_init:
         return err;
 }
 
-static int gfar_hwtstamp_ioctl(struct net_device *netdev,
-                               struct ifreq *ifr, int cmd)
+static int gfar_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
 {
         struct hwtstamp_config config;
         struct gfar_private *priv = netdev_priv(netdev);
@@ -845,7 +844,20 @@ static int gfar_hwtstamp_ioctl(struct net_device *netdev,
                 -EFAULT : 0;
 }
 
-/* Ioctl MII Interface */
+static int gfar_hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
+{
+        struct hwtstamp_config config;
+        struct gfar_private *priv = netdev_priv(netdev);
+
+        config.flags = 0;
+        config.tx_type = priv->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
+        config.rx_filter = (priv->hwts_rx_en ?
+                            HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE);
+
+        return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
+                -EFAULT : 0;
+}
+
 static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 {
         struct gfar_private *priv = netdev_priv(dev);
@@ -854,7 +866,9 @@ static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
                 return -EINVAL;
 
         if (cmd == SIOCSHWTSTAMP)
-                return gfar_hwtstamp_ioctl(dev, rq, cmd);
+                return gfar_hwtstamp_set(dev, rq);
+        if (cmd == SIOCGHWTSTAMP)
+                return gfar_hwtstamp_get(dev, rq);
 
         if (!priv->phydev)
                 return -ENODEV;