diff options
| author | Patrick Wildt <patrick@cvs.openbsd.org> | 2024-03-24 22:34:07 +0000 |
|---|---|---|
| committer | Patrick Wildt <patrick@cvs.openbsd.org> | 2024-03-24 22:34:07 +0000 |
| commit | 888131a24dbba5a15aaf1ce5173fe11389d5593f (patch) | |
| tree | c93164f58e8505d544ccccfc56616d37ebc2210a /sys | |
| parent | 154b097e7f9d32c5e6434d6087ee4fadf7aaa84a (diff) | |
Implement resetting the PHY via a GPIO pin, like in fec(4). This helps
enable the PHY on the Raspberry Pi 5.
ok kettenis@
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/fdt/if_cad.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sys/dev/fdt/if_cad.c b/sys/dev/fdt/if_cad.c index 7e20c9f3e75..9baa28aa805 100644 --- a/sys/dev/fdt/if_cad.c +++ b/sys/dev/fdt/if_cad.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_cad.c,v 1.13 2023/08/15 08:27:30 miod Exp $ */ +/* $OpenBSD: if_cad.c,v 1.14 2024/03/24 22:34:06 patrick Exp $ */ /* * Copyright (c) 2021-2022 Visa Hankala @@ -54,6 +54,7 @@ #include <dev/ofw/fdt.h> #include <dev/ofw/openfirm.h> #include <dev/ofw/ofw_clock.h> +#include <dev/ofw/ofw_gpio.h> #define GEM_NETCTL 0x0000 #define GEM_NETCTL_DPRAM (1 << 18) @@ -388,6 +389,8 @@ cad_attach(struct device *parent, struct device *self, void *aux) struct fdt_attach_args *faa = aux; struct cad_softc *sc = (struct cad_softc *)self; struct ifnet *ifp = &sc->sc_ac.ac_if; + uint32_t phy_reset_gpio[3]; + uint32_t phy_reset_duration; uint32_t hi, lo; uint32_t rev, ver; uint32_t val; @@ -427,6 +430,20 @@ cad_attach(struct device *parent, struct device *self, void *aux) ether_fakeaddr(ifp); } + if (OF_getpropintarray(faa->fa_node, "phy-reset-gpios", phy_reset_gpio, + sizeof(phy_reset_gpio)) == sizeof(phy_reset_gpio)) { + phy_reset_duration = OF_getpropint(faa->fa_node, + "phy-reset-duration", 1); + if (phy_reset_duration > 1000) + phy_reset_duration = 1; + + gpio_controller_config_pin(phy_reset_gpio, GPIO_CONFIG_OUTPUT); + gpio_controller_set_pin(phy_reset_gpio, 1); + delay((phy_reset_duration + 1) * 1000); + gpio_controller_set_pin(phy_reset_gpio, 0); + delay(1000); + } + phy = OF_getpropint(faa->fa_node, "phy-handle", 0); node = OF_getnodebyphandle(phy); if (node != 0) |