[PATCH net-next] net: stmmac: dwmac-rk: enable the reference clock for output mode
From: Jiaxing Hu <hidden>
Date: 2026-07-16 06:56:12
Subsystem:
arm/rockchip soc support, networking drivers, stmmac ethernet driver, the rest · Maintainers:
Heiko Stuebner, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
rk_gmac_clk_init() only requests the refout clock group for RMII. The ArmSoM CM5 has an on-module YT8531 RGMII PHY with no crystal that needs the SoC 25 MHz reference (clk_mac_refout), so in RGMII the clock was never enabled and the PHY did not respond on MDIO. Request the group whenever the SoC drives the clock (clock_in_out = "output"), not just for RMII. The clocks are optional, so other boards are unaffected. Signed-off-by: Jiaxing Hu <redacted> --- drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 8d7042e68..dd060e4b8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c@@ -1112,7 +1112,7 @@ static int rk_gmac_clk_init(struct plat_stmmacenet_data *plat) bsp_priv->clk_enabled = false; bsp_priv->num_clks = ARRAY_SIZE(rk_clocks); - if (phy_iface == PHY_INTERFACE_MODE_RMII) + if (phy_iface == PHY_INTERFACE_MODE_RMII || !bsp_priv->clock_input) bsp_priv->num_clks += ARRAY_SIZE(rk_rmii_clocks); bsp_priv->clks = devm_kcalloc(dev, bsp_priv->num_clks,
@@ -1123,7 +1123,7 @@ static int rk_gmac_clk_init(struct plat_stmmacenet_data *plat) for (i = 0; i < ARRAY_SIZE(rk_clocks); i++) bsp_priv->clks[i].id = rk_clocks[i]; - if (phy_iface == PHY_INTERFACE_MODE_RMII) { + if (phy_iface == PHY_INTERFACE_MODE_RMII || !bsp_priv->clock_input) { for (j = 0; j < ARRAY_SIZE(rk_rmii_clocks); j++) bsp_priv->clks[i++].id = rk_rmii_clocks[j]; }
--
2.43.0