Index: head/sys/dev/pwm/pwmbus.c
===================================================================
--- head/sys/dev/pwm/pwmbus.c	(revision 349079)
+++ head/sys/dev/pwm/pwmbus.c	(revision 349080)
@@ -1,207 +1,207 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
  *
  * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include "opt_platform.h"
 
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/bus.h>
 #include <sys/conf.h>
 #include <sys/endian.h>
 #include <sys/kernel.h>
 #include <sys/module.h>
 
 #include <machine/bus.h>
 
 #include <dev/ofw/ofw_bus.h>
 #include <dev/ofw/ofw_bus_subr.h>
 
 #include <dev/pwm/pwmbus.h>
 
 #include "pwmbus_if.h"
 #include "pwm_if.h"
 
 struct pwmbus_channel_data {
 	int	reserved;
 	char	*name;
 };
 
 struct pwmbus_softc {
 	device_t	busdev;
 	device_t	dev;
 
 	int		nchannels;
 };
 
 static int
 pwmbus_probe(device_t dev)
 {
 
 	device_set_desc(dev, "PWM bus");
 	return (BUS_PROBE_GENERIC);
 }
 
 static int
 pwmbus_attach(device_t dev)
 {
 	struct pwmbus_softc *sc;
 
 	sc = device_get_softc(dev);
 	sc->busdev = dev;
 	sc->dev = device_get_parent(dev);
 
 	if (PWM_CHANNEL_MAX(sc->dev, &sc->nchannels) != 0 ||
 	    sc->nchannels == 0)
 		return (ENXIO);
 
 	if (bootverbose)
 		device_printf(dev, "Registering %d channel(s)\n", sc->nchannels);
 	bus_generic_probe(dev);
 
 	return (bus_generic_attach(dev));
 }
 
 static int
 pwmbus_detach(device_t dev)
 {
 	int rv;
 
 	if ((rv = bus_generic_detach(dev)) == 0)
 		rv = device_delete_children(dev);
 
 	return (rv);
 }
 
 static int
 pwmbus_channel_config(device_t bus, int channel, unsigned int period, unsigned int duty)
 {
 	struct pwmbus_softc *sc;
 
 	sc = device_get_softc(bus);
 
 	if (channel > sc->nchannels)
 		return (EINVAL);
 
 	return (PWM_CHANNEL_CONFIG(sc->dev, channel, period, duty));
 }
 
 static int
 pwmbus_channel_get_config(device_t bus, int channel, unsigned int *period, unsigned int *duty)
 {
 	struct pwmbus_softc *sc;
 
 	sc = device_get_softc(bus);
 
 	if (channel > sc->nchannels)
 		return (EINVAL);
 
 	return (PWM_CHANNEL_GET_CONFIG(sc->dev, channel, period, duty));
 }
 
 static int
 pwmbus_channel_set_flags(device_t bus, int channel, uint32_t flags)
 {
 	struct pwmbus_softc *sc;
 
 	sc = device_get_softc(bus);
 
 	if (channel > sc->nchannels)
 		return (EINVAL);
 
 	return (PWM_CHANNEL_SET_FLAGS(sc->dev, channel, flags));
 }
 
 static int
 pwmbus_channel_get_flags(device_t bus, int channel, uint32_t *flags)
 {
 	struct pwmbus_softc *sc;
 
 	sc = device_get_softc(bus);
 
 	if (channel > sc->nchannels)
 		return (EINVAL);
 
 	return (PWM_CHANNEL_GET_FLAGS(sc->dev, channel, flags));
 }
 
 static int
 pwmbus_channel_enable(device_t bus, int channel, bool enable)
 {
 	struct pwmbus_softc *sc;
 
 	sc = device_get_softc(bus);
 
 	if (channel > sc->nchannels)
 		return (EINVAL);
 
 	return (PWM_CHANNEL_ENABLE(sc->dev, channel, enable));
 }
 
 static int
 pwmbus_channel_is_enabled(device_t bus, int channel, bool *enable)
 {
 	struct pwmbus_softc *sc;
 
 	sc = device_get_softc(bus);
 
 	if (channel > sc->nchannels)
 		return (EINVAL);
 
 	return (PWM_CHANNEL_IS_ENABLED(sc->dev, channel, enable));
 }
 
 static device_method_t pwmbus_methods[] = {
 	/* device_if */
 	DEVMETHOD(device_probe, pwmbus_probe),
 	DEVMETHOD(device_attach, pwmbus_attach),
 	DEVMETHOD(device_detach, pwmbus_detach),
 
 	/* pwm interface */
 	DEVMETHOD(pwmbus_channel_config, pwmbus_channel_config),
 	DEVMETHOD(pwmbus_channel_get_config, pwmbus_channel_get_config),
 	DEVMETHOD(pwmbus_channel_set_flags, pwmbus_channel_set_flags),
 	DEVMETHOD(pwmbus_channel_get_flags, pwmbus_channel_get_flags),
 	DEVMETHOD(pwmbus_channel_enable, pwmbus_channel_enable),
 	DEVMETHOD(pwmbus_channel_is_enabled, pwmbus_channel_is_enabled),
 
 	DEVMETHOD_END
 };
 
-driver_t pwmbus_driver = {
+static driver_t pwmbus_driver = {
 	"pwmbus",
 	pwmbus_methods,
 	sizeof(struct pwmbus_softc),
 };
-devclass_t pwmbus_devclass;
+static devclass_t pwmbus_devclass;
 
 EARLY_DRIVER_MODULE(pwmbus, pwm, pwmbus_driver, pwmbus_devclass, 0, 0,
   BUS_PASS_SUPPORTDEV + BUS_PASS_ORDER_MIDDLE);
 MODULE_VERSION(pwmbus, 1);