# \[PATCH net-next v20 05/13\] ax88179\_178a: Add EEE configuration support for AX88179A MACs

- From: Birger Koblitz \<hidden\>
- Date: 2026-11-06 07:21:40 
- List: netdev
- Page: https://ratatoskr.run/netdev/2026/11/17876245
- Thread: https://ratatoskr.run/linux-usb/2026/11/17876248/t.md

```text
The AX88179A uses a simple HW configuration for EEE
via a single EEE configuration register without LPI timer support
Add support for setting this EEE enable/disable register in implementations
of mac_enable_tx_lpi/mac_disable_tx_lpi.

Signed-off-by: Birger Koblitz <redacted>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/usb/ax88179a_devices.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/net/usb/ax88179a_devices.c b/drivers/net/usb/ax88179a_devices.c
index 1aa8479422517bff6758c884c5e47258c5d3ed3a..62619fd68c408f453e48c94020bce2254da9a1f9 100644
--- a/drivers/net/usb/ax88179a_devices.c
+++ b/drivers/net/usb/ax88179a_devices.c
@@ -395,10 +395,27 @@ static void ax88179a_mac_link_up(struct phylink_config *config,
 			 AX_MAC_RX_PATH_READY | AX_MAC_TX_PATH_READY);
 }
 
+static void ax88179a_mac_disable_tx_lpi(struct phylink_config *config)
+{
+	struct usbnet *dev = netdev_priv(to_net_dev(config->dev));
+
+	ax88179_write_cmd(dev, AX_GPHY_CTL, AX_GPHY_EEE_CTRL, false, 0, NULL);
+}
+
+static int ax88179a_mac_enable_tx_lpi(struct phylink_config *config, u32 timer, bool tx_clk_stop)
+{
+	struct usbnet *dev = netdev_priv(to_net_dev(config->dev));
+
+	/* AX88179A does not provide LPI timer registers */
+	return ax88179_write_cmd(dev, AX_GPHY_CTL, AX_GPHY_EEE_CTRL, true, 0, NULL);
+}
+
 static const struct phylink_mac_ops ax88179a_phylink_mac_ops = {
 	.mac_config = ax88179a_mac_config,
 	.mac_link_down = ax88179a_mac_link_down,
 	.mac_link_up = ax88179a_mac_link_up,
+	.mac_disable_tx_lpi = ax88179a_mac_disable_tx_lpi,
+	.mac_enable_tx_lpi = ax88179a_mac_enable_tx_lpi,
 };
 
 static int ax88179a_phylink_setup(struct usbnet *dev)

-- 
2.47.3

```