Read a single GPIO pin indicating whether AC is plugged in or not.
This gives me a sensor on my Pinebook Pro.
cwfg(4) already provides battery information but not the charger bits.
apm(4) integration can follow separately.
Feedback? OK?
diff 4e7699b4cf65fba4bf837b202fb68ee0f66e6d07 refs/heads/master
blob - b92b1f60934ba60f92341ce94570d0ae96e78c1d
blob + 549a8316b874e4e5a6e1ede1640eeefadd9af0d4
--- distrib/sets/lists/man/mi
+++ distrib/sets/lists/man/mi
@@ -1417,6 +1417,7 @@
./usr/share/man/man4/glenv.4
./usr/share/man/man4/glkgpio.4
./usr/share/man/man4/gpio.4
+./usr/share/man/man4/gpiocharger.4
./usr/share/man/man4/gpiodcf.4
./usr/share/man/man4/gpioiic.4
./usr/share/man/man4/gpioleds.4
blob - bb62c44d32f152ecf64aa77d60a1a5a3454d3968
blob + a40cf91ec22f638f9c030aa7128d10bf75748305
--- share/man/man4/Makefile
+++ share/man/man4/Makefile
@@ -35,7 +35,8 @@ MAN= aac.4 abcrtc.4 abl.4 ac97.4 acphy.4 acrtc.4 \
eso.4 ess.4 et.4 etherip.4 etphy.4 ex.4 exphy.4 exrtc.4 \
fanpwr.4 fd.4 fdc.4 fec.4 fido.4 fins.4 fintek.4 fms.4 fusbtc.4 \
fuse.4 fxp.4 \
- gdt.4 gentbi.4 gem.4 gfrtc.4 gif.4 glenv.4 glkgpio.4 gpio.4 gpiodcf.4 \
+ gdt.4 gentbi.4 gem.4 gfrtc.4 gif.4 glenv.4 glkgpio.4 gpio.4 \
+ gpiocharger.4 gpiodcf.4 \
gpioiic.4 gpioleds.4 gpioow.4 graphaudio.4 gre.4 gscsio.4 \
hds.4 hiclock.4 hidwusb.4 hifn.4 hil.4 hilid.4 hilkbd.4 hilms.4 \
hireset.4 hitemp.4 hme.4 hotplug.4 hsq.4 \
blob - /dev/null
blob + 12aa353d9367f57f07a89ae30dc3966c373032f8 (mode 644)
--- /dev/null
+++ share/man/man4/gpiocharger.4
@@ -0,0 +1,51 @@
+.\" $OpenBSD: $
+.\"
+.\" Copyright (c) 2021 Klemens Nanni <[email protected]>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: September 04 2021 $
+.Dt GPIOCHARGER 4
+.Os
+.Sh NAME
+.Nm gpiocharger
+.Nd GPIO battery charger
+.Sh SYNOPSIS
+.Cd "gpiocharger* at fdt?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for battery chargers connected to GPIO pins.
+Currently, only power supply status events are supported.
+.Pp
+The power supply status (connected or disconnected) is set up as a sensor
+and can be monitored using
+.Xr sysctl 8
+or
+.Xr sensorsd 8 .
+.Sh SEE ALSO
+.Xr gpio 4 ,
+.Xr intro 4 ,
+.Xr sensorsd 8 ,
+.Xr sysctl 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 7.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Klemens Nanni Aq Mt [email protected] .
blob - d3c3afb621f20013dc2475b4d87bd959e4127c9d
blob + b0702181cd2e510ef5267460dc71b68a8abd508a
--- sys/arch/arm64/conf/GENERIC
+++ sys/arch/arm64/conf/GENERIC
@@ -132,6 +132,7 @@ drm* at amdgpu?
wsdisplay* at amdgpu?
gpioleds* at fdt?
+gpiocharger* at fdt?
# Apple
apldart* at fdt?
blob - f749803b07408179ddc090d484ed4f79bfcb52a7
blob + f91263405dc183dd60e8ddc1fe69c5fbaf38b651
--- sys/dev/fdt/files.fdt
+++ sys/dev/fdt/files.fdt
@@ -592,3 +592,7 @@ file dev/fdt/dapmic.c dapmic
device gpioleds
attach gpioleds at fdt
file dev/fdt/gpioleds.c gpioleds
+
+device gpiocharger
+attach gpiocharger at fdt
+file dev/fdt/gpiocharger.c gpiocharger
blob - /dev/null
blob + dbf6bf50a13029438b9b7e969306c34640c5747e (mode 644)
--- /dev/null
+++ sys/dev/fdt/gpiocharger.c
@@ -0,0 +1,116 @@
+/* $OpenBSD: $ */
+/*
+ * Copyright (c) 2021 Klemens Nanni <[email protected]>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/gpio.h>
+#include <sys/malloc.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/gpio/gpiovar.h>
+#include <dev/ofw/ofw_gpio.h>
+#include <dev/ofw/ofw_pinctrl.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/fdt.h>
+
+#include <sys/sensors.h>
+
+struct gpiocharger_softc {
+ struct device sc_dev;
+ int sc_node;
+ uint32_t *sc_charger_pin;
+ struct ksensor sc_sensor;
+ struct ksensordev sc_sensordev;
+};
+
+int gpiocharger_match(struct device *, void *, void *);
+void gpiocharger_attach(struct device *, struct device *, void *);
+
+struct cfattach gpiocharger_ca = {
+ sizeof (struct gpiocharger_softc), gpiocharger_match, gpiocharger_attach
+};
+
+struct cfdriver gpiocharger_cd = {
+ NULL, "gpiocharger", DV_DULL
+};
+
+void gpiocharger_update_charger(void *);
+
+int
+gpiocharger_match(struct device *parent, void *match, void *aux)
+{
+ const struct fdt_attach_args *faa = aux;
+
+ return OF_is_compatible(faa->fa_node, "gpio-charger");
+}
+
+void
+gpiocharger_attach(struct device *parent, struct device *self, void *aux)
+{
+ struct gpiocharger_softc *sc = (struct gpiocharger_softc *)self;
+ struct fdt_attach_args *faa = aux;
+ char *charger_type, *gpios_property;
+ int charger_type_len, gpios_len;
+ int node = faa->fa_node;
+
+ pinctrl_byname(node, "default");
+
+ charger_type_len = OF_getproplen(node, "charger-type");
+ if (charger_type_len <= 0)
+ goto nocharger;
+ gpios_len = OF_getproplen(node, gpios_property = "gpios");
+ if (gpios_len <= 0) {
+ gpios_len = OF_getproplen(node,
+ gpios_property = "charger-status-gpios");
+ if (gpios_len <= 0)
+ goto nocharger;
+ }
+
+ charger_type = malloc(charger_type_len, M_TEMP, M_WAITOK);
+ OF_getprop(node, "charger-type", charger_type, charger_type_len);
+ sc->sc_charger_pin = malloc(gpios_len, M_DEVBUF, M_WAITOK);
+ OF_getpropintarray(node, gpios_property, sc->sc_charger_pin, gpios_len);
+ gpio_controller_config_pin(sc->sc_charger_pin, GPIO_CONFIG_INPUT);
+
+ strlcpy(sc->sc_sensor.desc, charger_type, sizeof(sc->sc_sensor.desc));
+ strlcat(sc->sc_sensor.desc, " power supply",
+ sizeof(sc->sc_sensor.desc));
+ sc->sc_sensor.type = SENSOR_INDICATOR;
+ sensor_attach(&sc->sc_sensordev, &sc->sc_sensor);
+ strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
+ sizeof(sc->sc_sensordev.xname));
+ sensordev_install(&sc->sc_sensordev);
+ sensor_task_register(sc, gpiocharger_update_charger, 5);
+
+ printf(": \"%s\"\n", charger_type);
+ free(charger_type, M_TEMP, charger_type_len);
+ return;
+
+nocharger:
+ printf(": no charger\n");
+}
+
+void
+gpiocharger_update_charger(void *arg)
+{
+ struct gpiocharger_softc *sc = arg;
+
+ sc->sc_sensor.value = gpio_controller_get_pin(sc->sc_charger_pin);
+}
