Add qcpon(4), a driver for the Qualcomm PMIC block that hosts the powerkey

and reset input.  With this I can use the power button on my x13s to power
off the machine.

ok kettenis@

diff --git a/sys/dev/fdt/qcpon.c b/sys/dev/fdt/qcpon.c
new file mode 100644 (file)
index 0000000..0e23d50
--- /dev/null
+++ b/sys/dev/fdt/qcpon.c
@@ -0,0 +1,120 @@
+/*     $OpenBSD: qcpon.c,v 1.1 2022/11/08 19:44:28 patrick Exp $       */
+/*
+ * Copyright (c) 2022 Patrick Wildt <patrick@blueri.se>
+ *
+ * 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/malloc.h>
+#include <sys/systm.h>
+#include <sys/task.h>
+#include <sys/proc.h>
+#include <sys/signalvar.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/fdt/spmivar.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_clock.h>
+#include <dev/ofw/ofw_power.h>
+#include <dev/ofw/fdt.h>
+
+struct qcpon_softc {
+       struct device           sc_dev;
+       int                     sc_node;
+
+       spmi_tag_t              sc_tag;
+       int8_t                  sc_sid;
+
+       void                    *sc_pwrkey_ih;
+       struct task             sc_powerdown_task;
+};
+
+int    qcpon_match(struct device *, void *, void *);
+void   qcpon_attach(struct device *, struct device *, void *);
+
+int    qcpon_pwrkey_intr(void *);
+void   qcpon_powerdown_task(void *);
+
+const struct cfattach qcpon_ca = {
+       sizeof(struct qcpon_softc), qcpon_match, qcpon_attach
+};
+
+struct cfdriver qcpon_cd = {
+       NULL, "qcpon", DV_DULL
+};
+
+int
+qcpon_match(struct device *parent, void *match, void *aux)
+{
+       struct spmi_attach_args *saa = aux;
+
+       return OF_is_compatible(saa->sa_node, "qcom,pm8998-pon");
+}
+
+void
+qcpon_attach(struct device *parent, struct device *self, void *aux)
+{
+       struct spmi_attach_args *saa = aux;
+       struct qcpon_softc *sc = (struct qcpon_softc *)self;
+       int node, reg;
+
+       reg = OF_getpropint(saa->sa_node, "reg", -1);
+       if (reg < 0) {
+               printf(": can't find registers\n");
+               return;
+       }
+
+       sc->sc_node = saa->sa_node;
+       sc->sc_tag = saa->sa_tag;
+       sc->sc_sid = saa->sa_sid;
+
+       task_set(&sc->sc_powerdown_task, qcpon_powerdown_task, sc);
+
+       printf("\n");
+
+       for (node = OF_child(saa->sa_node); node; node = OF_peer(node)) {
+               if (OF_is_compatible(node, "qcom,pmk8350-pwrkey")) {
+                       sc->sc_pwrkey_ih = fdt_intr_establish(node, IPL_BIO,
+                           qcpon_pwrkey_intr, sc, sc->sc_dev.dv_xname);
+                       if (sc->sc_pwrkey_ih == NULL) {
+                               printf("%s: can't establish interrupt\n",
+                                   sc->sc_dev.dv_xname);
+                               continue;
+                       }
+               }
+       }
+}
+
+int
+qcpon_pwrkey_intr(void *arg)
+{
+       struct qcpon_softc *sc = arg;
+
+       task_add(systq, &sc->sc_powerdown_task);
+       return 1;
+}
+
+void
+qcpon_powerdown_task(void *arg)
+{
+       extern int allowpowerdown;
+
+       if (allowpowerdown == 1) {
+               allowpowerdown = 0;
+               prsignal(initprocess, SIGUSR2);
+       }
+}