net: stmmac: dwc-qos: use PHY clock-stop capability

Use the PHY clock-stop capability when programming the MAC LPI mode,
which allows the transmit clock to the PHY to be gated. Tested on the
Jetson Xavier NX platform.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/E1u4zi1-000xHh-57@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
index 583b5c071cd147c2431b387ca01a6f21331523df..fa900b4991d06252bd5f002d584457178a7abe40 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
@@ -252,7 +252,8 @@ bypass_clk_reset_gpio:
        plat_dat->fix_mac_speed = tegra_eqos_fix_speed;
        plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate;
        plat_dat->bsp_priv = eqos;
-       plat_dat->flags |= STMMAC_FLAG_SPH_DISABLE;
+       plat_dat->flags |= STMMAC_FLAG_SPH_DISABLE |
+                          STMMAC_FLAG_EN_TX_LPI_CLK_PHY_CAP;
 
        return 0;