diff options
| author | Sander Vanheule | 2026-02-21 14:00:39 +0000 |
|---|---|---|
| committer | Sander Vanheule | 2026-02-24 20:29:26 +0000 |
| commit | ba57225066243b28d2802ea5c47313c97767150e (patch) | |
| tree | 23bdb5ebab0b4915df2ca9fedfa97e2e135cbfc6 | |
| parent | cdbd9eb448a8fa802cbc2b2f8a1dec93b3999a3b (diff) | |
| download | openwrt-ba57225066243b28d2802ea5c47313c97767150e.tar.gz | |
realtek: hog the GS1900-24E external IC reset line
The GPIO line connecting to the reset signals of the GS1900-24E(A1)'s
external ICs (RTL8218B phys and RTL8231 expander) cannot be asserted by
the MDIO subsystem, as the reset is shared between busses.
To prevent users from accidentally asserting the reset line, a GPIO hog
is created to permanently de-assert the signal, reliably keeping the
phys and GPIO expanders on.
Tested-by: Simon Fischer <simi.fischa@gmail.com>
Signed-off-by: Sander Vanheule <sander@svanheule.net>
| -rw-r--r-- | target/linux/realtek/dts/rtl8382_zyxel_gs1900-24e-a1.dts | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/target/linux/realtek/dts/rtl8382_zyxel_gs1900-24e-a1.dts b/target/linux/realtek/dts/rtl8382_zyxel_gs1900-24e-a1.dts index c54648cc32..4cffc040ed 100644 --- a/target/linux/realtek/dts/rtl8382_zyxel_gs1900-24e-a1.dts +++ b/target/linux/realtek/dts/rtl8382_zyxel_gs1900-24e-a1.dts @@ -8,6 +8,16 @@ model = "Zyxel GS1900-24E A1"; }; +&gpio0 { + /* Shared between the main and aux MDIO busses */ + mdio_reset { + gpio-hog; + gpios = <1 GPIO_ACTIVE_LOW>; + output-low; + line-name = "mdio-reset"; + }; +}; + &mdio_bus0 { EXTERNAL_PHY(0) EXTERNAL_PHY(1) |