[PATCH v4 4/5] net: phy: Add MediaTek built-in 2.5Gb ethernet PHY driver

[Tom Rini]

On Mon, Sep 08, 2025 at 04:34:18PM +0800, Weijie Gao wrote:

> The MediaTek MT7987/MT7988 SoCs features a built-in 2.5Gb PHY
> connected to GMAC1. The PHY supports 10/100/1000/2500 Mbps
> full-duplex only.
> 
> The PHY requires one or two firmware files. Firmware for MT7988 has
> already been added to upstream: mediatek/mt7988/i2p5ge-phy-pmb.bin.
> MT7987 has two firmware files which will be add to upstream later:
> i2p5ge-phy-pmb.bin and i2p5ge-phy-DSPBitTb.bin.
> 
> Environment variable can be set for firmware data loading:
> mt7987_i2p5ge_load_pmb_firmware for i2p5ge-phy-pmb.bin
> mt7987_i2p5ge_load_dspbit_firmware for i2p5ge-phy-DSPBitTb.bin
> mt7988_i2p5ge_load_pmb_firmware for i2p5ge-phy-pmb.bin
> 
> This driver allows dedicated weak functions to be overridden by
> board to provide the firmware data:
> mt7987_i2p5ge_get_fw() for MT7987
> mt7988_i2p5ge_get_fw() for MT7988
> 
> To enable the PHY, add the following not to device tree:
> &eth1 {
> 	status = "okay";
> 	phy-mode = "xgmii";
> 	phy-handle = <&phy15>;
> 
> 	phy15: ethernet-phy at 15 {
> 		compatible = "ethernet-phy-ieee802.3-c45";
> 		reg = <15>;
> 		phy-mode = "xgmii";
> 	};
> };
> 
> Signed-off-by: Sky Huang <SkyLake.Huang at mediatek.com>
> Signed-off-by: Weijie Gao <weijie.gao at mediatek.com>

Sorry for the late review:

> diff --git a/drivers/net/phy/mediatek/Kconfig b/drivers/net/phy/mediatek/Kconfig
> new file mode 100644
> index 00000000000..7de7b65b4e6
> --- /dev/null
> +++ b/drivers/net/phy/mediatek/Kconfig
> @@ -0,0 +1,16 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +
> +config MTK_NET_PHYLIB
> +	tristate

A tristate makes no sense in U-Boot, it needs to be bool. I'll fix this
in the merge commit while applying.

-- 
Tom
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