lan78xx: Read initial EEE status from DT

Add two new DT properties:
* microchip,eee-enabled  - a boolean to enable EEE
* microchip,tx-lpi-timer - time in microseconds to wait before entering
                           low power state

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 6bc78a1d1504d3d3e98d54d88f732557caa4a58c..e1bf394d4ba747d38c3acc1abc3a54b81215521d 100644 (file)
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2337,6 +2337,22 @@ static int lan78xx_open(struct net_device *net)
        if (ret < 0)
                goto done;
 
+       if (of_property_read_bool(dev->udev->dev.of_node,
+                                 "microchip,eee-enabled")) {
+               struct ethtool_eee edata;
+               memset(&edata, 0, sizeof(edata));
+               edata.cmd = ETHTOOL_SEEE;
+               edata.advertised = ADVERTISED_1000baseT_Full |
+                                  ADVERTISED_100baseT_Full;
+               edata.eee_enabled = true;
+               edata.tx_lpi_enabled = true;
+               if (of_property_read_u32(dev->udev->dev.of_node,
+                                        "microchip,tx-lpi-timer",
+                                        &edata.tx_lpi_timer))
+                       edata.tx_lpi_timer = 600; /* non-aggressive */
+               (void)lan78xx_set_eee(net, &edata);
+       }
+
        /* for Link Check */
        if (dev->urb_intr) {
                ret = usb_submit_urb(dev->urb_intr, GFP_KERNEL);