--- /dev/null
+/* $OpenBSD: pinctrl.c,v 1.1 2018/08/26 19:50:08 kettenis Exp $ */
+/*
+ * Copyright (c) 2018 Mark Kettenis <kettenis@openbsd.org>
+ *
+ * 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/malloc.h>
+
+#include <machine/intr.h>
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_misc.h>
+#include <dev/ofw/ofw_pinctrl.h>
+#include <dev/ofw/fdt.h>
+
+#define HREAD4(sc, reg) \
+ (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
+#define HWRITE4(sc, reg, val) \
+ bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
+
+struct pinctrl_softc {
+ struct device sc_dev;
+ bus_space_tag_t sc_iot;
+ bus_space_handle_t sc_ioh;
+
+ uint32_t sc_reg_width;
+ uint32_t sc_func_mask;
+};
+
+int pinctrl_match(struct device *, void *, void *);
+void pinctrl_attach(struct device *, struct device *, void *);
+
+struct cfattach pinctrl_ca = {
+ sizeof (struct pinctrl_softc), pinctrl_match, pinctrl_attach
+};
+
+struct cfdriver pinctrl_cd = {
+ NULL, "pinctrl", DV_DULL
+};
+
+int pinctrl_pinctrl(uint32_t, void *);
+
+int
+pinctrl_match(struct device *parent, void *match, void *aux)
+{
+ struct fdt_attach_args *faa = aux;
+
+ return OF_is_compatible(faa->fa_node, "pinctrl-single");
+}
+
+void
+pinctrl_attach(struct device *parent, struct device *self, void *aux)
+{
+ struct pinctrl_softc *sc = (struct pinctrl_softc *)self;
+ struct fdt_attach_args *faa = aux;
+
+ if (faa->fa_nreg < 1) {
+ printf(": no registers\n");
+ return;
+ }
+
+ sc->sc_reg_width = OF_getpropint(faa->fa_node,
+ "pinctrl-single,register-width", 0);
+ if (sc->sc_reg_width != 32) {
+ printf(": unsupported register width\n");
+ return;
+ }
+
+ sc->sc_func_mask = OF_getpropint(faa->fa_node,
+ "pinctrl-single,function-mask", 0);
+ if (sc->sc_func_mask == 0) {
+ printf(": bogus function mask\n");
+ return;
+ }
+
+ sc->sc_iot = faa->fa_iot;
+ if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
+ faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
+ printf(": can't map registers\n");
+ return;
+ }
+
+ pinctrl_register(faa->fa_node, pinctrl_pinctrl, sc);
+
+ printf("\n");
+}
+
+int
+pinctrl_pinctrl(uint32_t phandle, void *cookie)
+{
+ struct pinctrl_softc *sc = cookie;
+ uint32_t *pins;
+ int node, len, i;
+
+ node = OF_getnodebyphandle(phandle);
+ if (node == 0)
+ return -1;
+
+ len = OF_getproplen(node, "pinctrl-single,pins");
+ if (len <= 0)
+ return -1;
+
+ pins = malloc(len, M_TEMP, M_WAITOK);
+ OF_getpropintarray(node, "pinctrl-single,pins", pins, len);
+
+ for (i = 0; i < len / sizeof(uint32_t); i += 2) {
+ uint32_t reg = pins[i];
+ uint32_t func = pins[i + 1];
+ uint32_t val;
+
+ switch (sc->sc_reg_width) {
+ case 32:
+ val = HREAD4(sc, reg);
+ val &= ~sc->sc_func_mask;
+ val |= (func & sc->sc_func_mask);
+ HWRITE4(sc, reg, val);
+ break;
+ }
+ }
+
+ free(pins, M_TEMP, len);
+ return 0;
+}
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