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realtek: add hog for PHY reset for XS1930-10 and -12HP

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Add a GPIO hog for those two switches to avoid having a dangling GPIO
which might be pulled accidentally breaking all PHYs, and to have that
GPIO documented.

Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/23428
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Jonas Jelonek 2026-05-18 13:07:36 +00:00 committed by Robert Marko
parent 8d9103a420
commit c166c20cf6
1 changed files with 15 additions and 0 deletions
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15
target/linux/realtek/dts/rtl9313_zyxel_xs1930-aqr813.dtsi
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@ -65,6 +65,21 @@
pinctrl-names = "default";
pinctrl-0 = <&pinmux_disable_jtag>;
/*
* GPIO 31 is the global reset pin shared by all PHYs across all MDIO
* buses. It is intentionally not declared as reset-gpios on any bus:
* the MDIO driver / phylink only support a reset GPIO per bus, not on
* the parent controller. Attaching it to a single bus would still reset
* the PHYs on the other buses as a side effect, leaving their software
* state out of sync with the hardware and likely breaking them.
*/
phy_reset_hog {
gpio-hog;
gpios = <31 GPIO_ACTIVE_LOW>;
output-low;
line-name = "phy-reset";
};
sfp_enable_hog {
gpio-hog;
gpios = <6 GPIO_ACTIVE_LOW>,