Index: head/sys/arm/allwinner/aw_p2wi.c
===================================================================
--- head/sys/arm/allwinner/aw_p2wi.c	(nonexistent)
+++ head/sys/arm/allwinner/aw_p2wi.c	(revision 307822)
@@ -0,0 +1,277 @@
+/*-
+ * Copyright (c) 2016 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 ``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 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Allwinner P2WI (Push-Pull Two Wire Interface)
+ * P2WI is a iic-like interface used on sun6i hardware
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/rman.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/iicbus/iiconf.h>
+#include <dev/iicbus/iicbus.h>
+
+#include <dev/extres/clk/clk.h>
+#include <dev/extres/hwreset/hwreset.h>
+
+#include <arm/allwinner/aw_p2wi.h>
+
+#include "iicbus_if.h"
+
+static struct ofw_compat_data compat_data[] = {
+	{ "allwinner,sun6i-a31-p2wi",		1 },
+	{ NULL,					0 }
+};
+
+static struct resource_spec p2wi_spec[] = {
+	{ SYS_RES_MEMORY,	0,	RF_ACTIVE },
+	{ -1, 0 }
+};
+
+struct p2wi_softc {
+	struct resource	*res;
+	struct mtx	mtx;
+	clk_t		clk;
+	hwreset_t	rst;
+	device_t	iicbus;
+};
+
+#define	P2WI_LOCK(sc)			mtx_lock(&(sc)->mtx)
+#define	P2WI_UNLOCK(sc)			mtx_unlock(&(sc)->mtx)
+#define	P2WI_READ(sc, reg)		bus_read_4((sc)->res, (reg))
+#define	P2WI_WRITE(sc, reg, val)	bus_write_4((sc)->res, (reg), (val))
+
+#define	P2WI_RETRY	1000
+
+static phandle_t
+p2wi_get_node(device_t bus, device_t dev)
+{
+	return (ofw_bus_get_node(bus));
+}
+
+static int
+p2wi_reset(device_t dev, u_char speed, u_char addr, u_char *oldaddr)
+{
+	struct p2wi_softc *sc;
+	int retry;
+
+	sc = device_get_softc(dev);
+
+	P2WI_LOCK(sc);
+
+	P2WI_WRITE(sc, P2WI_CTRL, P2WI_CTRL_SOFT_RESET);
+	for (retry = P2WI_RETRY; retry > 0; retry--)
+		if ((P2WI_READ(sc, P2WI_CTRL) & P2WI_CTRL_SOFT_RESET) == 0)
+			break;
+
+	P2WI_UNLOCK(sc);
+
+	if (retry == 0) {
+		device_printf(dev, "soft reset timeout\n");
+		return (ETIMEDOUT);
+	}
+
+	return (IIC_ENOADDR);
+}
+
+static int
+p2wi_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs)
+{
+	struct p2wi_softc *sc;
+	int retry, error;
+	uint8_t data_len;
+
+	sc = device_get_softc(dev);
+
+	/*
+	 * Since P2WI is only used for AXP22x PMIC we only support
+	 * two messages of one byte length
+	 */
+	if (nmsgs != 2 || (msgs[0].flags & IIC_M_RD) == IIC_M_RD ||
+	    msgs[0].len != 1 || msgs[1].len != 1)
+		return (EINVAL);
+
+	P2WI_LOCK(sc);
+
+	/* Write address */
+	P2WI_WRITE(sc, P2WI_DADDR0, msgs[0].buf[0]);
+
+	/* Write Data length/Direction */
+	data_len = P2WI_DLEN_LEN(msgs[1].len);
+	if ((msgs[1].flags & IIC_M_RD) == 0)
+		P2WI_WRITE(sc, P2WI_DATA0, msgs[1].buf[0]);
+	else
+		data_len |= P2WI_DLEN_READ;
+	P2WI_WRITE(sc, P2WI_DLEN, data_len);
+
+	/* Start transfer */
+	P2WI_WRITE(sc, P2WI_CTRL, P2WI_CTRL_START_TRANS);
+
+	/* Wait for transfer to complete */
+	for (retry = P2WI_RETRY; retry > 0; retry--)
+		if ((P2WI_READ(sc, P2WI_CTRL) & P2WI_CTRL_START_TRANS) == 0)
+			break;
+
+	if (retry == 0) {
+		error = ETIMEDOUT;
+		goto done;
+	}
+
+	/* Read data if needed */
+	if ((msgs[1].flags & IIC_M_RD) == IIC_M_RD) {
+		msgs[1].buf[0] = P2WI_READ(sc, P2WI_DATA0) & 0xff;
+		msgs[1].len = 1;
+	}
+
+	error = 0;
+
+done:
+	P2WI_UNLOCK(sc);
+
+	return (error);
+}
+
+static int
+p2wi_probe(device_t dev)
+{
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
+		return (ENXIO);
+
+	device_set_desc(dev, "Allwinner P2WI");
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+p2wi_attach(device_t dev)
+{
+	struct p2wi_softc *sc;
+	int error;
+
+	sc = device_get_softc(dev);
+	mtx_init(&sc->mtx, device_get_nameunit(dev), "p2wi", MTX_DEF);
+
+	if (clk_get_by_ofw_index(dev, 0, 0, &sc->clk) == 0) {
+		error = clk_enable(sc->clk);
+		if (error != 0) {
+			device_printf(dev, "cannot enable clock\n");
+			goto fail;
+		}
+	}
+	if (hwreset_get_by_ofw_idx(dev, 0, 0, &sc->rst) == 0) {
+		error = hwreset_deassert(sc->rst);
+		if (error != 0) {
+			device_printf(dev, "cannot de-assert reset\n");
+			goto fail;
+		}
+	}
+
+	if (bus_alloc_resources(dev, p2wi_spec, &sc->res) != 0) {
+		device_printf(dev, "cannot allocate resources for device\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	sc->iicbus = device_add_child(dev, "iicbus", -1);
+	if (sc->iicbus == NULL) {
+		device_printf(dev, "cannot add iicbus child device\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	/* Disable interrupts */
+	P2WI_WRITE(sc, P2WI_INTE, 0x0);
+
+	bus_generic_attach(dev);
+
+	return (0);
+
+fail:
+	bus_release_resources(dev, p2wi_spec, &sc->res);
+	if (sc->rst != NULL)
+		hwreset_release(sc->rst);
+	if (sc->clk != NULL)
+		clk_release(sc->clk);
+	mtx_destroy(&sc->mtx);
+	return (error);
+}
+
+static device_method_t p2wi_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		p2wi_probe),
+	DEVMETHOD(device_attach,	p2wi_attach),
+
+	/* Bus interface */
+	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
+	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
+	DEVMETHOD(bus_alloc_resource,	bus_generic_alloc_resource),
+	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
+	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+	DEVMETHOD(bus_adjust_resource,	bus_generic_adjust_resource),
+	DEVMETHOD(bus_set_resource,	bus_generic_rl_set_resource),
+	DEVMETHOD(bus_get_resource,	bus_generic_rl_get_resource),
+
+	/* OFW methods */
+	DEVMETHOD(ofw_bus_get_node,	p2wi_get_node),
+
+	/* iicbus interface */
+	DEVMETHOD(iicbus_callback,	iicbus_null_callback),
+	DEVMETHOD(iicbus_reset,		p2wi_reset),
+	DEVMETHOD(iicbus_transfer,	p2wi_transfer),
+
+	DEVMETHOD_END
+};
+
+static driver_t p2wi_driver = {
+	"iichb",
+	p2wi_methods,
+	sizeof(struct p2wi_softc),
+};
+
+static devclass_t p2wi_devclass;
+
+EARLY_DRIVER_MODULE(iicbus, p2wi, iicbus_driver, iicbus_devclass, 0, 0,
+    BUS_PASS_RESOURCE + BUS_PASS_ORDER_MIDDLE);
+EARLY_DRIVER_MODULE(p2wi, simplebus, p2wi_driver, p2wi_devclass, 0, 0,
+    BUS_PASS_RESOURCE + BUS_PASS_ORDER_MIDDLE);
+MODULE_VERSION(p2wi, 1);

Property changes on: head/sys/arm/allwinner/aw_p2wi.c
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Added: svn:keywords
## -0,0 +1 ##
+FreeBSD=%H
\ No newline at end of property
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
\ No newline at end of property
Index: head/sys/arm/allwinner/aw_p2wi.h
===================================================================
--- head/sys/arm/allwinner/aw_p2wi.h	(nonexistent)
+++ head/sys/arm/allwinner/aw_p2wi.h	(revision 307822)
@@ -0,0 +1,79 @@
+/*-
+ * Copyright (c) 2016 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 ``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 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __AW_P2WI_H__
+#define	__AW_P2WI_H__
+
+#define	P2WI_CTRL			0x00
+#define	 P2WI_CTRL_SOFT_RESET		(1 << 0)
+#define	 P2WI_CTRL_GLOBAL_INT_ENB	(1 << 1)
+#define	 P2WI_CTRL_ABORT_TRANS		(1 << 6)
+#define	 P2WI_CTRL_START_TRANS		(1 << 7)
+
+#define	P2WI_CCR			0x04
+#define	 P2WI_CCR_CLK_DIV_SHIFT		0
+#define	 P2WI_CCR_CLK_DIV_MASK		0xFF
+#define	 P2WI_CCR_SDA_ODLY_SHIFT	7
+#define	 P2WI_CCR_SDA_ODLY_MASK		0x700
+
+#define	P2WI_INTE	0x08
+#define	 P2WI_INTE_TRANS_OVER_ENB
+#define	 P2WI_INTE_TRANS_ERR_ENB
+#define	 P2WI_INTE_LOAD_BSY_ENB
+
+#define	P2WI_STAT			0x0C
+#define	 P2WI_STAT_TRANS_OVER		(1 << 0)
+#define	 P2WI_STAT_TRANS_ERR		(1 << 1)
+#define	 P2WI_STAT_LOAD_BSY		(1 << 2)
+#define	 P2WI_STAT_TRANS_ERR_ID_SHIFT	7
+#define	 P2WI_STAT_TRANS_ERR_ID_MASK	0xFF00
+
+#define	P2WI_DADDR0	0x10
+
+#define	P2WI_DADDR1	0x14
+
+#define	P2WI_DLEN		0x18
+#define	 P2WI_DLEN_LEN(x)	((x - 1) & 0x7)
+#define	 P2WI_DLEN_READ		(1 << 4)
+
+#define	P2WI_DATA0	0x1C
+
+#define	P2WI_DATA1	0x20
+
+#define	P2WI_LCR		0x24
+#define	 P2WI_LCR_SDA_CTL_EN	(1 << 0)
+#define	 P2WI_LCR_SDA_CTL	(1 << 1)
+#define	 P2WI_LCR_SCL_CTL_EN	(1 << 2)
+#define	 P2WI_LCR_SCL_CTL	(1 << 3)
+#define	 P2WI_LCR_SDA_STATE	(1 << 4)
+#define	 P2WI_LCR_SCL_STATE	(1 << 5)
+
+
+#define	P2WI_PMCR	0x28
+
+#endif /* __AW_P2WI_H__ */

Property changes on: head/sys/arm/allwinner/aw_p2wi.h
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Added: svn:keywords
## -0,0 +1 ##
+FreeBSD=%H
\ No newline at end of property
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
\ No newline at end of property
Index: head/sys/arm/allwinner/files.allwinner
===================================================================
--- head/sys/arm/allwinner/files.allwinner	(revision 307821)
+++ head/sys/arm/allwinner/files.allwinner	(revision 307822)
@@ -1,57 +1,58 @@
 # $FreeBSD$
 kern/kern_clocksource.c			standard
 
 arm/allwinner/a10_ahci.c		optional	ahci
 arm/allwinner/a10_codec.c		optional	sound
 arm/allwinner/a10_common.c		standard
 arm/allwinner/a10_dmac.c		standard
 arm/allwinner/a10_ehci.c		optional	ehci
 arm/allwinner/aw_usbphy.c		optional	ehci
 arm/allwinner/a10_gpio.c		optional	gpio
 arm/allwinner/a10_mmc.c			optional	mmc
 arm/allwinner/a10_sramc.c		standard
 arm/allwinner/aw_nmi.c			optional	intrng
 arm/allwinner/aw_if_dwc.c		optional	dwc
+arm/allwinner/aw_p2wi.c			optional	p2wi
 arm/allwinner/aw_rsb.c			optional	rsb
 arm/allwinner/aw_rtc.c			standard
 arm/allwinner/aw_ts.c			standard
 arm/allwinner/aw_wdog.c			standard
 arm/allwinner/aw_machdep.c		standard
 arm/allwinner/aw_mp.c			optional	smp
 arm/allwinner/axp209.c			optional	axp209
 arm/allwinner/axp81x.c			optional	axp81x
 arm/allwinner/if_awg.c			optional	awg
 arm/allwinner/if_emac.c			optional	emac
 arm/allwinner/sunxi_dma_if.m		standard
 dev/iicbus/twsi/a10_twsi.c		optional	twsi
 dev/usb/controller/generic_ohci.c	optional	ohci
 dev/usb/controller/generic_usb_if.m	optional	ohci
 arm/allwinner/aw_sid.c			standard
 arm/allwinner/aw_thermal.c		standard
 dev/iicbus/sy8106a.c			optional	sy8106a
 #arm/allwinner/console.c		standard
 
 arm/allwinner/a10_fb.c			optional	vt
 arm/allwinner/a10_hdmi.c		optional	hdmi
 arm/allwinner/a10_hdmiaudio.c		optional	hdmi sound
 arm/arm/hdmi_if.m			optional	hdmi
 
 arm/allwinner/aw_reset.c		standard
 arm/allwinner/aw_ccu.c			standard
 arm/allwinner/clk/aw_ahbclk.c		standard
 arm/allwinner/clk/aw_apbclk.c		standard
 arm/allwinner/clk/aw_axiclk.c		standard
 arm/allwinner/clk/aw_codecclk.c		standard
 arm/allwinner/clk/aw_cpuclk.c		standard
 arm/allwinner/clk/aw_cpusclk.c		standard
 arm/allwinner/clk/aw_debeclk.c		standard
 arm/allwinner/clk/aw_gate.c		standard
 arm/allwinner/clk/aw_gmacclk.c		standard
 arm/allwinner/clk/aw_hdmiclk.c		standard
 arm/allwinner/clk/aw_lcdclk.c		standard
 arm/allwinner/clk/aw_modclk.c		standard
 arm/allwinner/clk/aw_mmcclk.c		standard
 arm/allwinner/clk/aw_oscclk.c		standard
 arm/allwinner/clk/aw_pll.c		standard
 arm/allwinner/clk/aw_thsclk.c		standard
 arm/allwinner/clk/aw_usbclk.c		standard
Index: head/sys/arm/conf/GENERIC
===================================================================
--- head/sys/arm/conf/GENERIC	(revision 307821)
+++ head/sys/arm/conf/GENERIC	(revision 307822)
@@ -1,173 +1,174 @@
 #
 # GENERICV6 -- Generic(ish) kernel config.
 #
 # For more information on this file, please read the config(5) manual page,
 # and/or the handbook section on Kernel Configuration Files:
 #
 #    http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
 #
 # The handbook is also available locally in /usr/share/doc/handbook
 # if you've installed the doc distribution, otherwise always see the
 # FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
 # latest information.
 #
 # An exhaustive list of options and more detailed explanations of the
 # device lines is also present in the ../../conf/NOTES and NOTES files.
 # If you are in doubt as to the purpose or necessity of a line, check first
 # in NOTES.
 #
 # $FreeBSD$
 
 ident		GENERIC
 
 cpu		CPU_CORTEXA_MP
 machine 	arm armv6
 makeoptions	CONF_CFLAGS="-march=armv7a"
 
 makeoptions	KERNVIRTADDR=0xc0000000
 options 	KERNVIRTADDR=0xc0000000
 
 include 	"std.armv6"
 files		"../allwinner/files.allwinner"
 files		"../allwinner/a20/files.a20"
 files		"../allwinner/a31/files.a31"
 files		"../allwinner/a83t/files.a83t"
 files		"../allwinner/h3/files.h3"
 files		"../broadcom/bcm2835/files.bcm2836"
 files		"../broadcom/bcm2835/files.bcm283x"
 files		"../nvidia/tegra124/files.tegra124"
 files		"../qemu/files.qemu"
 
 options 	SOC_ALLWINNER_A20
 options 	SOC_ALLWINNER_A31
 options 	SOC_ALLWINNER_A31S
 options 	SOC_ALLWINNER_A83T
 options 	SOC_ALLWINNER_H3
 options 	SOC_BCM2836
 
 options 	SCHED_ULE		# ULE scheduler
 options 	SMP			# Enable multiple cores
 options 	PLATFORM
 options 	PLATFORM_SMP
 options 	MULTIDELAY
 options 	LINUX_BOOT_ABI
 
 # EXT_RESOURCES pseudo devices
 options 	EXT_RESOURCES
 device		clk
 device		phy
 device		hwreset
 device		regulator
 
 # Interrupt controller
 options 	INTRNG
 device		gic
 
 # ARM Generic Timer
 device		generic_timer
 
 # MMC/SD/SDIO Card slot support
 device		sdhci			# SD controller
 device		mmc			# mmc/sd bus
 device		mmcsd			# mmc/sd flash cards
 
 # ATA controllers
 device		ahci			# AHCI-compatible SATA controllers
 #device		ata			# Legacy ATA/SATA controllers
 
 # PCI
 options 	NEW_PCIB
 device		pci
 
 # PCI NICs
 device		re			# RealTek 8139C+/8169/8169S/8110S
 
 # VirtIO
 device		virtio
 device		virtio_mmio
 device		virtio_blk
 device		vtnet
 
 # Console and misc
 device		uart
 device		uart_ns8250
 device		uart_snps
 device		pl011
 device		pty
 device		snp
 device		md			# Memory "disks"
 device		random			# Entropy device
 device		psci
 
 # I2C support
 device		iicbus
 device		iic
 device		twsi
 device		rsb
+device		p2wi			# Allwinner Push-Pull Two Wire interface
 device		axp209			# AXP209 Power Management Unit
 device		axp81x			# AXP813/818 Power Management Unit
 device		bcm2835_bsc
 device		icee
 
 # GPIO
 device		gpio
 device		gpioled
 device		gpioregulator
 
 # SPI
 device		spibus
 device		bcm2835_spi
 
 device		scbus			# SCSI bus (required for ATA/SCSI)
 device		da			# Direct Access (disks)
 device		cd			# CD
 device		pass			# Passthrough device (direct ATA/SCSI access)
 
 # USB support
 options 	USB_HOST_ALIGN=64	# Align usb buffers to cache line size.
 device		usb
 #device		uhci
 device		ohci
 device		ehci
 device		dwcotg			# DWC OTG controller
 
 device		umass			# Disks/Mass storage - Requires scbus and da
 device		uhid			# "Human Interface Devices"
 device		ukbd			# Allow keyboard like HIDs to control console
 
 # Ethernet
 device		loop
 device		ether
 device		vlan			# 802.1Q VLAN support
 device		mii
 device		bpf
 
 #device		emac			# 10/100 integrated EMAC controller
 device		dwc			# 10/100/1000 integrated GMAC controller
 device		awg			# 10/100/1000 integrated EMAC controller
 
 # USB ethernet support, requires miibus
 device		smcphy
 device		smsc
 device		miibus
 
 # Sound support
 device		sound
 
 # Framebuffer support
 device		vt
 device		kbdmux
 device		ums
 device		videomode
 device		hdmi
 device		vchiq
 
 # Pinmux
 device		fdt_pinctrl
 
 # Extensible Firmware Interface
 options 	EFI
 
 # Flattened Device Tree
 options 	FDT			# Configure using FDT/DTB data
 makeoptions	MODULES_EXTRA="dtb/allwinner dtb/nvidia dtb/rpi"