[openwrt/openwrt] arm-trusted-firmware-mediatek: enable built-in 2.5G PHY on MT7988

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch openwrt-23.05:
https://git.openwrt.org/a2ffbc8d1604bf0e71962c76ec4e7feec5fda102

commit a2ffbc8d1604bf0e71962c76ec4e7feec5fda102
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Mon Aug 28 23:44:52 2023 +0100

    arm-trusted-firmware-mediatek: enable built-in 2.5G PHY on MT7988
    
    Always enable built-in 2.5G PHY on MT7988 for now, so that it can be
    used. In future it would be nice to be able to switch power and MDIO
    access via address 0 at run-time in Linux, both, to be able to use
    external PHYs at address 0 and to reduce power consumption on systems
    not using the built-in 2.5G PHY.
    
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
    (cherry picked from commit 33046d2a471ed687404a617c356b9cdf5652c2d6)
---
 .../patches/001-mt7988-enable-2p5g-phy.patch                  | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/package/boot/arm-trusted-firmware-mediatek/patches/001-mt7988-enable-2p5g-phy.patch b/package/boot/arm-trusted-firmware-mediatek/patches/001-mt7988-enable-2p5g-phy.patch
new file mode 100644
index 0000000000..d377bd8433
--- /dev/null
+++ b/package/boot/arm-trusted-firmware-mediatek/patches/001-mt7988-enable-2p5g-phy.patch
@@ -0,0 +1,11 @@
+--- a/plat/mediatek/mt7988/bl2/bl2_plat_init.c
++++ b/plat/mediatek/mt7988/bl2/bl2_plat_init.c
+@@ -90,6 +90,8 @@ static void mtk_i2p5g_phy_init(void)
+ 	 * clear bit 22 to use external MDIO.
+ 	 */
+ 	mmio_setbits_32(GBE_TOP_REG, I2P5G_MDIO);
++	/* Internal 2.5Gphy power on sequence */
++	eth_2p5g_phy_mtcmos_ctrl(true);
+ }
+ 
+ static void mt7988_i2c_init(void)