netdev - [PATCH] net: xilinx: emaclite: add minimal ndo_do

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Date:   Mon, 8 Apr 2019 12:01:57 +0300
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <netdev@...r.kernel.org>
CC:     Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH] net: xilinx: emaclite: add minimal ndo_do_ioctl hook

This hook only implements a minimal set of ioctl hooks to be able to access
MII regs by using phytool.
When using this simple MAC controller, it's pretty difficult to do
debugging of the PHY chip without checking MII regs.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
---
 drivers/net/ethernet/xilinx/xilinx_emaclite.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
index b03a417d0073..0aea05ac6dcc 100644
--- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -1229,12 +1229,29 @@ xemaclite_poll_controller(struct net_device *ndev)
 }
 #endif
 
+/* Ioctl MII Interface */
+static int xemaclite_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	if (!dev->phydev || !netif_running(dev))
+		return -EINVAL;
+
+	switch (cmd) {
+	case SIOCGMIIPHY:
+	case SIOCGMIIREG:
+	case SIOCSMIIREG:
+		return phy_mii_ioctl(dev->phydev, rq, cmd);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static const struct net_device_ops xemaclite_netdev_ops = {
 	.ndo_open		= xemaclite_open,
 	.ndo_stop		= xemaclite_close,
 	.ndo_start_xmit		= xemaclite_send,
 	.ndo_set_mac_address	= xemaclite_set_mac_address,
 	.ndo_tx_timeout		= xemaclite_tx_timeout,
+	.ndo_do_ioctl		= xemaclite_ioctl,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller = xemaclite_poll_controller,
 #endif
-- 
2.17.1