[PATCH 2/3] net: stmmac: Bring down the clocks to lower frequencies when mac link goes down

Sagar Cheluvegowda quic_scheluve at quicinc.com
Wed Jun 19 15:41:30 PDT 2024


When mac link goes down we don't need to mainitain the clocks to operate
at higher frequencies, as an optimized solution to save power when
the link goes down we are trying to bring down the clocks to the
frequencies corresponding to the lowest speed possible.

Signed-off-by: Sagar Cheluvegowda <quic_scheluve at quicinc.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index b3afc7cb7d72..bfb201a4b885 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -990,6 +990,9 @@ static void stmmac_mac_link_down(struct phylink_config *config,
 {
 	struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev));
 
+	if (priv->plat->fix_mac_speed)
+		priv->plat->fix_mac_speed(priv->plat->bsp_priv, SPEED_10, mode);
+
 	stmmac_mac_set(priv, priv->ioaddr, false);
 	priv->eee_active = false;
 	priv->tx_lpi_enabled = false;

-- 
2.34.1




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