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diff --git a/sys/dev/acpi_support/acpi_cros_kblt.c b/sys/dev/acpi_support/acpi_cros_kblt.c
new file mode 100644
--- /dev/null
+++ b/sys/dev/acpi_support/acpi_cros_kblt.c
@@ -0,0 +1,174 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2020 Greg V <greg@unrelenting.technology>
+ *
+ * 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 "opt_acpi.h"
+
+#include <sys/cdefs.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <machine/cpufunc.h>
+
+#include <dev/backlight/backlight.h>
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+
+#include "acpi_if.h"
+#include "backlight_if.h"
+#include <sys/module.h>
+#include <dev/acpica/acpivar.h>
+
+ACPI_MODULE_NAME("CROS_KBLT")
+
+struct acpi_cros_kblt_softc {
+ device_t dev;
+ ACPI_HANDLE handle;
+ int val;
+
+ struct cdev *cdev;
+};
+
+static int
+acpi_cros_kblt_resume(device_t dev)
+{
+ struct acpi_cros_kblt_softc *sc = device_get_softc(dev);
+
+ ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
+
+ if (ACPI_FAILURE(acpi_SetInteger(sc->handle, "KBCM", sc->val))) {
+ device_printf(sc->dev, "ACPI failure\n");
+ return (ENXIO);
+ }
+
+ return (0);
+}
+
+static char *cros_kblt_ids[] = {"GOOG0002", NULL};
+
+static int
+acpi_cros_kblt_probe(device_t dev)
+{
+ int err;
+
+ if (acpi_disabled("cros_kblt") ||
+ device_get_unit(dev) != 0)
+ return (ENXIO);
+
+ err = ACPI_ID_PROBE(device_get_parent(dev), dev, cros_kblt_ids, NULL);
+
+ if (err <= 0)
+ device_set_desc(dev, "Chromium EC Keyboard Backlight Control");
+
+ return (err);
+}
+
+static int
+acpi_cros_kblt_attach(device_t dev)
+{
+ struct acpi_cros_kblt_softc *sc = device_get_softc(dev);
+
+ sc->dev = dev;
+ sc->handle = acpi_get_handle(dev);
+
+ if (ACPI_FAILURE(acpi_GetInteger(sc->handle, "KBQC", &sc->val))) {
+ device_printf(sc->dev, "'KBQC' ACPI method failed\n");
+ return (ENXIO);
+ }
+
+ sc->cdev = backlight_register("acpi_cros_kblt", dev);
+ if (sc->cdev == NULL)
+ device_printf(dev, "Cannot register as a backlight\n");
+
+ return (0);
+}
+
+static int
+acpi_cros_kblt_update_status(device_t dev, struct backlight_props *props)
+{
+ struct acpi_cros_kblt_softc *sc = device_get_softc(dev);
+ sc->val = props->brightness;
+
+ if (ACPI_FAILURE(acpi_SetInteger(sc->handle, "KBCM", sc->val))) {
+ device_printf(sc->dev, "'KBCM' ACPI method failed\n");
+ return (ENXIO);
+ }
+
+ return (0);
+}
+
+static int
+acpi_cros_kblt_get_status(device_t dev, struct backlight_props *props)
+{
+ struct acpi_cros_kblt_softc *sc = device_get_softc(dev);
+
+ if (ACPI_FAILURE(acpi_GetInteger(sc->handle, "KBQC", &sc->val))) {
+ device_printf(sc->dev, "'KBQC' ACPI method failed\n");
+ return (ENXIO);
+ }
+
+ props->brightness = sc->val;
+ props->nlevels = 0;
+
+ return (0);
+}
+
+static int
+acpi_cros_kblt_get_info(device_t dev, struct backlight_info *info)
+{
+
+ info->type = BACKLIGHT_TYPE_KEYBOARD;
+ strlcpy(info->name, "Chromium EC Keyboard", BACKLIGHTMAXNAMELENGTH);
+
+ return (0);
+}
+
+static device_method_t acpi_cros_kblt_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, acpi_cros_kblt_probe),
+ DEVMETHOD(device_attach, acpi_cros_kblt_attach),
+ DEVMETHOD(device_resume, acpi_cros_kblt_resume),
+
+ /* Backlight interface */
+ DEVMETHOD(backlight_update_status, acpi_cros_kblt_update_status),
+ DEVMETHOD(backlight_get_status, acpi_cros_kblt_get_status),
+ DEVMETHOD(backlight_get_info, acpi_cros_kblt_get_info),
+
+ DEVMETHOD_END
+};
+
+static driver_t acpi_cros_kblt_driver = {
+ "acpi_cros_kblt",
+ acpi_cros_kblt_methods,
+ sizeof(struct acpi_cros_kblt_softc),
+};
+
+static devclass_t acpi_cros_kblt_devclass;
+
+DRIVER_MODULE(acpi_cros_kblt, acpi, acpi_cros_kblt_driver,
+ acpi_cros_kblt_devclass, 0, 0);
+MODULE_DEPEND(acpi_cros_kblt, acpi, 1, 1, 1);
diff --git a/sys/modules/acpi/acpi_cros_kblt/Makefile b/sys/modules/acpi/acpi_cros_kblt/Makefile
new file mode 100644
--- /dev/null
+++ b/sys/modules/acpi/acpi_cros_kblt/Makefile
@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+.PATH: ${SRCTOP}/sys/dev/acpi_support
+KMOD= acpi_cros_kblt
+SRCS= acpi_cros_kblt.c opt_acpi.h device_if.h bus_if.h acpi_if.h backlight_if.h
+
+.include <bsd.kmod.mk>

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