[PATCH net-next v2 7/9] net: stmmac: qcom-ethqos: set initial RGMII link clock to lowest speed
From: Mohd Ayaan Anwar
Date: Mon Sep 07 2026 - 16:26:44 EST
On probe the RGMII link clock is initialised at SPEED_1000, which
translates to a 250 MHz source clock even when no PHY link is present,
drawing unnecessary power.
Initialise at SPEED_10 instead; fix_mac_speed updates the rate once
a link is established.
Reviewed-by: Maxime Chevallier <maxime.chevallier@xxxxxxxxxxx>
Signed-off-by: Mohd Ayaan Anwar <mohd.anwar@xxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index a92bf4a6a2dbd987893bd4a3890df770bb7a7e56..2471871562ed9915398614d5c88d1c6673829db8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -814,7 +814,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
"Failed to get serdes phy\n");
ethqos_set_clk_tx_rate(ethqos, NULL, plat_dat->phy_interface,
- SPEED_1000);
+ SPEED_10);
qcom_ethqos_set_sgmii_loopback(ethqos, true);
ethqos_set_func_clk_en(ethqos);
--
2.34.1