From c756b8ee6ddeeb017558d39149859297b090b4cc Mon Sep 17 00:00:00 2001
From: patrick <patrick@openbsd.org>
Date: Tue, 8 Nov 2022 19:44:28 +0000
Subject: [PATCH] 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@
---
 sys/dev/fdt/qcpon.c | 120 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 sys/dev/fdt/qcpon.c

diff --git a/sys/dev/fdt/qcpon.c b/sys/dev/fdt/qcpon.c
new file mode 100644
index 00000000000..0e23d507eb1
--- /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);
+	}
+}
-- 
2.20.1