text: /*-
   * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   *
   * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
   *
   * 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 <sys/param.h>
  #include <sys/bus.h>
  #include <sys/kernel.h>
  #include <sys/module.h>
  #include <sys/mutex.h>
  #include <sys/rman.h>
  #include <machine/bus.h>
  
  #include <dev/iicbus/iiconf.h>
  #include <dev/iicbus/iicbus.h>
  
  #include <dev/ofw/ofw_bus.h>
  #include <dev/ofw/ofw_bus_subr.h>
  
  #include <dev/extres/regulator/regulator.h>
  
  #include <arm64/rockchip/rk805reg.h>
  
  #include "regdev_if.h"
  
  MALLOC_DEFINE(M_RK805_REG, "RK805 regulator", "RK805 power regulator");
  
  /* #define	dprintf(sc, format, arg...)	device_printf(sc->base_dev, "%s: " format, __func__, arg) */
  #define	dprintf(sc, format, arg...)
  
  enum rk_pmic_type {
  	RK805 = 1,
  	RK808,
  };
  
  static struct ofw_compat_data compat_data[] = {
  	{"rockchip,rk805", RK805},
  	{"rockchip,rk808", RK808},
  	{NULL,             0}
  };
  
  struct rk805_regdef {
  	intptr_t		id;
  	char			*name;
  	uint8_t			enable_reg;
  	uint8_t			enable_mask;
  	uint8_t			voltage_reg;
  	uint8_t			voltage_mask;
  	int			voltage_min;
  	int			voltage_max;
  	int			voltage_step;
  	int			voltage_nstep;
  };
  
  struct rk805_reg_sc {
  	struct regnode		*regnode;
  	device_t		base_dev;
  	struct rk805_regdef	*def;
  	phandle_t		xref;
  	struct regnode_std_param *param;
  };
  
  struct rk805_softc {
  	device_t		dev;
  	struct mtx		mtx;
  	struct resource *	res[1];
  	void *			intrcookie;
  	struct intr_config_hook	intr_hook;
  	enum rk_pmic_type	type;
  
  	struct rk805_reg_sc	**regs;
  	int			nregs;
  };
  
  static int rk805_regnode_status(struct regnode *regnode, int *status);
  static int rk805_regnode_set_voltage(struct regnode *regnode, int min_uvolt,
      int max_uvolt, int *udelay);
  
  static struct rk805_regdef rk805_regdefs[] = {
  	{
  		.id = RK805_DCDC1,
  		.name = "DCDC_REG1",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x11,
  		.voltage_reg = RK805_DCDC1_ON_VSEL,
  		.voltage_mask = 0x3F,
  		.voltage_min = 712500,
  		.voltage_max = 1450000,
  		.voltage_step = 12500,
  		.voltage_nstep = 64,
  	},
  	{
  		.id = RK805_DCDC2,
  		.name = "DCDC_REG2",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x22,
  		.voltage_reg = RK805_DCDC2_ON_VSEL,
  		.voltage_mask = 0x3F,
  		.voltage_min = 712500,
  		.voltage_max = 1450000,
  		.voltage_step = 12500,
  		.voltage_nstep = 64,
  	},
  	{
  		.id = RK805_DCDC3,
  		.name = "DCDC_REG3",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x44,
  	},
  	{
  		.id = RK805_DCDC4,
  		.name = "DCDC_REG4",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x88,
  		.voltage_reg = RK805_DCDC4_ON_VSEL,
  		.voltage_mask = 0x3F,
  		.voltage_min = 800000,
  		.voltage_max = 3500000,
  		.voltage_step = 100000,
  		.voltage_nstep = 28,
  	},
  	{
  		.id = RK805_LDO1,
  		.name = "LDO_REG1",
  		.enable_reg = RK805_LDO_EN,
  		.enable_mask = 0x11,
  		.voltage_reg = RK805_LDO1_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 800000,
  		.voltage_max = 3400000,
  		.voltage_step = 100000,
  		.voltage_nstep = 27,
  	},
  	{
  		.id = RK805_LDO2,
  		.name = "LDO_REG2",
  		.enable_reg = RK805_LDO_EN,
  		.enable_mask = 0x22,
  		.voltage_reg = RK805_LDO2_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 800000,
  		.voltage_max = 3400000,
  		.voltage_step = 100000,
  		.voltage_nstep = 27,
  	},
  	{
  		.id = RK805_LDO3,
  		.name = "LDO_REG3",
  		.enable_reg = RK805_LDO_EN,
  		.enable_mask = 0x44,
  		.voltage_reg = RK805_LDO3_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 800000,
  		.voltage_max = 3400000,
  		.voltage_step = 100000,
  		.voltage_nstep = 27,
  	},
  };
  
  static struct rk805_regdef rk808_regdefs[] = {
  	{
  		.id = RK805_DCDC1,
  		.name = "DCDC_REG1",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x1,
  		.voltage_reg = RK805_DCDC1_ON_VSEL,
  		.voltage_mask = 0x3F,
  		.voltage_min = 712500,
  		.voltage_max = 1500000,
  		.voltage_step = 12500,
  		.voltage_nstep = 64,
  	},
  	{
  		.id = RK805_DCDC2,
  		.name = "DCDC_REG2",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x2,
  		.voltage_reg = RK805_DCDC2_ON_VSEL,
  		.voltage_mask = 0x3F,
  		.voltage_min = 712500,
  		.voltage_max = 1500000,
  		.voltage_step = 12500,
  		.voltage_nstep = 64,
  	},
  	{
  		/* BUCK3 voltage is calculated based on external resistor */
  		.id = RK805_DCDC3,
  		.name = "DCDC_REG3",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x4,
  	},
  	{
  		.id = RK805_DCDC4,
  		.name = "DCDC_REG4",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x8,
  		.voltage_reg = RK805_DCDC4_ON_VSEL,
  		.voltage_mask = 0xF,
  		.voltage_min = 1800000,
  		.voltage_max = 3300000,
  		.voltage_step = 100000,
  		.voltage_nstep = 16,
  	},
  	{
  		.id = RK808_LDO1,
  		.name = "LDO_REG1",
  		.enable_reg = RK808_LDO_EN,
  		.enable_mask = 0x1,
  		.voltage_reg = RK805_LDO1_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 1800000,
  		.voltage_max = 3400000,
  		.voltage_step = 100000,
  		.voltage_nstep = 17,
  	},
  	{
  		.id = RK808_LDO2,
  		.name = "LDO_REG2",
  		.enable_reg = RK808_LDO_EN,
  		.enable_mask = 0x2,
  		.voltage_reg = RK805_LDO2_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 1800000,
  		.voltage_max = 3400000,
  		.voltage_step = 100000,
  		.voltage_nstep = 17,
  	},
  	{
  		.id = RK808_LDO3,
  		.name = "LDO_REG3",
  		.enable_reg = RK808_LDO_EN,
  		.enable_mask = 0x4,
  		.voltage_reg = RK805_LDO3_ON_VSEL,
  		.voltage_mask = 0xF,
  		.voltage_min = 800000,
  		.voltage_max = 2500000,
  		.voltage_step = 100000,
  		.voltage_nstep = 18,
  	},
  	{
  		.id = RK808_LDO4,
  		.name = "LDO_REG4",
  		.enable_reg = RK808_LDO_EN,
  		.enable_mask = 0x8,
  		.voltage_reg = RK808_LDO4_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 1800000,
  		.voltage_max = 3400000,
  		.voltage_step = 100000,
  		.voltage_nstep = 17,
  	},
  	{
  		.id = RK808_LDO5,
  		.name = "LDO_REG5",
  		.enable_reg = RK808_LDO_EN,
  		.enable_mask = 0x10,
  		.voltage_reg = RK808_LDO5_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 1800000,
  		.voltage_max = 3400000,
  		.voltage_step = 100000,
  		.voltage_nstep = 17,
  	},
  	{
  		.id = RK808_LDO6,
  		.name = "LDO_REG6",
  		.enable_reg = RK808_LDO_EN,
  		.enable_mask = 0x20,
  		.voltage_reg = RK808_LDO6_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 800000,
  		.voltage_max = 2500000,
  		.voltage_step = 100000,
  		.voltage_nstep = 18,
  	},
  	{
  		.id = RK808_LDO7,
  		.name = "LDO_REG7",
  		.enable_reg = RK808_LDO_EN,
  		.enable_mask = 0x40,
  		.voltage_reg = RK808_LDO7_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 800000,
  		.voltage_max = 2500000,
  		.voltage_step = 100000,
  		.voltage_nstep = 18,
  	},
  	{
  		.id = RK808_LDO8,
  		.name = "LDO_REG8",
  		.enable_reg = RK808_LDO_EN,
  		.enable_mask = 0x80,
  		.voltage_reg = RK808_LDO8_ON_VSEL,
  		.voltage_mask = 0x1F,
  		.voltage_min = 1800000,
  		.voltage_max = 3400000,
  		.voltage_step = 100000,
  		.voltage_nstep = 17,
  	},
  	{
  		.id = RK808_SWITCH1,
  		.name = "SWITCH_REG1",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x20,
  		.voltage_min = 3000000,
  		.voltage_max = 3000000,
  	},
  	{
  		.id = RK808_SWITCH2,
  		.name = "SWITCH_REG2",
  		.enable_reg = RK805_DCDC_EN,
  		.enable_mask = 0x40,
  		.voltage_min = 3000000,
  		.voltage_max = 3000000,
  	},
  };
  
  static int
  rk805_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size)
  {
  	int err;
  
  	err = iicdev_readfrom(dev, reg, data, size, IIC_INTRWAIT);
  	return (err);
  }
  
  static int
  rk805_write(device_t dev, uint8_t reg, uint8_t data)
  {
  
  	return (iicdev_writeto(dev, reg, &data, 1, IIC_INTRWAIT));
  }
  
  static int
  rk805_regnode_init(struct regnode *regnode)
  {
  	struct rk805_reg_sc *sc;
  	struct regnode_std_param *param;
  	int rv, udelay, status;
  
  	sc = regnode_get_softc(regnode);
  	param = regnode_get_stdparam(regnode);
  	if (param->min_uvolt == 0)
  		return (0);
  
  	/* 
  	 * Set the regulator at the correct voltage if it is not enabled.
  	 * Do not enable it, this is will be done either by a
  	 * consumer or by regnode_set_constraint if boot_on is true
  	 */
  	rv = rk805_regnode_status(regnode, &status);
  	if (rv != 0 || status == REGULATOR_STATUS_ENABLED)
  		return (rv);
  
  	rv = rk805_regnode_set_voltage(regnode, param->min_uvolt,
  	    param->max_uvolt, &udelay);
  	if (udelay != 0)
  		DELAY(udelay);
  
  	return (rv);
  }
  
  static int
  rk805_regnode_enable(struct regnode *regnode, bool enable, int *udelay)
  {
  	struct rk805_reg_sc *sc;
  	uint8_t val;
  
  	sc = regnode_get_softc(regnode);
  
  	dprintf(sc, "%sabling regulator %s\n",
  	    enable ? "En" : "Dis",
  	    sc->def->name);
  	rk805_read(sc->base_dev, sc->def->enable_reg, &val, 1);
  	if (enable)
  		val |= sc->def->enable_mask;
  	else
  		val &= ~sc->def->enable_mask;
  	rk805_write(sc->base_dev, sc->def->enable_reg, val);
  
  	*udelay = 0;
  
  	return (0);
  }
  
  static void
  rk805_regnode_reg_to_voltage(struct rk805_reg_sc *sc, uint8_t val, int *uv)
  {
  	if (val < sc->def->voltage_nstep)
  		*uv = sc->def->voltage_min + val * sc->def->voltage_step;
  	else
  		*uv = sc->def->voltage_min +
  		       (sc->def->voltage_nstep * sc->def->voltage_step);
  }
  
  static int
  rk805_regnode_voltage_to_reg(struct rk805_reg_sc *sc, int min_uvolt,
      int max_uvolt, uint8_t *val)
  {
  	uint8_t nval;
  	int nstep, uvolt;
  
  	nval = 0;
  	uvolt = sc->def->voltage_min;
  
  	for (nstep = 0; nstep < sc->def->voltage_nstep && uvolt < min_uvolt;
  	     nstep++) {
  		++nval;
  		uvolt += sc->def->voltage_step;
  	}
  	if (uvolt > max_uvolt)
  		return (EINVAL);
  
  	*val = nval;
  	return (0);
  }
  
  static int
  rk805_regnode_status(struct regnode *regnode, int *status)
  {
  	struct rk805_reg_sc *sc;
  	uint8_t val;
  
  	sc = regnode_get_softc(regnode);
  
  	*status = 0;
  	rk805_read(sc->base_dev, sc->def->enable_reg, &val, 1);
  	if (val & sc->def->enable_mask)
  		*status = REGULATOR_STATUS_ENABLED;
  
  	return (0);
  }
  
  static int
  rk805_regnode_set_voltage(struct regnode *regnode, int min_uvolt,
      int max_uvolt, int *udelay)
  {
  	struct rk805_reg_sc *sc;
  	uint8_t val;
  	int uvolt;
  
  	sc = regnode_get_softc(regnode);
  
  	if (!sc->def->voltage_step)
  		return (ENXIO);
  
  	dprintf(sc, "Setting %s to %d<->%d uvolts\n",
  	    sc->def->name,
  	    min_uvolt,
  	    max_uvolt);
  	rk805_read(sc->base_dev, sc->def->voltage_reg, &val, 1);
  	if (rk805_regnode_voltage_to_reg(sc, min_uvolt, max_uvolt, &val) != 0)
  		return (ERANGE);
  
  	rk805_write(sc->base_dev, sc->def->voltage_reg, val);
  
  	rk805_read(sc->base_dev, sc->def->voltage_reg, &val, 1);
  
  	*udelay = 0;
  
  	rk805_regnode_reg_to_voltage(sc, val, &uvolt);
  	dprintf(sc, "Regulator %s set to %d uvolt\n",
  	  sc->def->name,
  	  uvolt);
  
  	return (0);
  }
  
  static int
  rk805_regnode_get_voltage(struct regnode *regnode, int *uvolt)
  {
  	struct rk805_reg_sc *sc;
  	uint8_t val;
  
  	sc = regnode_get_softc(regnode);
  
  	if (sc->def->voltage_min ==  sc->def->voltage_max) {
  		*uvolt = sc->def->voltage_min;
  		return (0);
  	}
  
  	if (!sc->def->voltage_step)
  		return (ENXIO);
  
  	rk805_read(sc->base_dev, sc->def->voltage_reg, &val, 1);
  	rk805_regnode_reg_to_voltage(sc, val & sc->def->voltage_mask, uvolt);
  
  	dprintf(sc, "Regulator %s is at %d uvolt\n",
  	  sc->def->name,
  	  *uvolt);
  
  	return (0);
  }
  
  static regnode_method_t rk805_regnode_methods[] = {
  	/* Regulator interface */
  	REGNODEMETHOD(regnode_init,		rk805_regnode_init),
  	REGNODEMETHOD(regnode_enable,		rk805_regnode_enable),
  	REGNODEMETHOD(regnode_status,		rk805_regnode_status),
  	REGNODEMETHOD(regnode_set_voltage,	rk805_regnode_set_voltage),
  	REGNODEMETHOD(regnode_get_voltage,	rk805_regnode_get_voltage),
  	REGNODEMETHOD(regnode_check_voltage,	regnode_method_check_voltage),
  	REGNODEMETHOD_END
  };
  DEFINE_CLASS_1(rk805_regnode, rk805_regnode_class, rk805_regnode_methods,
      sizeof(struct rk805_reg_sc), regnode_class);
  
  static struct rk805_reg_sc *
  rk805_reg_attach(device_t dev, phandle_t node,
      struct rk805_regdef *def)
  {
  	struct rk805_reg_sc *reg_sc;
  	struct regnode_init_def initdef;
  	struct regnode *regnode;
  
  	memset(&initdef, 0, sizeof(initdef));
  	if (regulator_parse_ofw_stdparam(dev, node, &initdef) != 0) {
  		device_printf(dev, "cannot create regulator\n");
  		return (NULL);
  	}
  	if (initdef.std_param.min_uvolt == 0)
  		initdef.std_param.min_uvolt = def->voltage_min;
  	if (initdef.std_param.max_uvolt == 0)
  		initdef.std_param.max_uvolt = def->voltage_max;
  	initdef.id = def->id;
  	initdef.ofw_node = node;
  
  	regnode = regnode_create(dev, &rk805_regnode_class, &initdef);
  	if (regnode == NULL) {
  		device_printf(dev, "cannot create regulator\n");
  		return (NULL);
  	}
  
  	reg_sc = regnode_get_softc(regnode);
  	reg_sc->regnode = regnode;
  	reg_sc->base_dev = dev;
  	reg_sc->def = def;
  	reg_sc->xref = OF_xref_from_node(node);
  	reg_sc->param = regnode_get_stdparam(regnode);
  
  	regnode_register(regnode);
  
  	return (reg_sc);
  }
  
  static int
  rk805_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, "RockChip RK805 PMIC");
  	return (BUS_PROBE_DEFAULT);
  }
  
  static void
  rk805_start(void *pdev)
  {
  	struct rk805_softc *sc;
  	device_t dev;
  	uint8_t data[2];
  	int err;
  
  	dev = pdev;
  	sc = device_get_softc(dev);
  	sc->dev = dev;
  
  	/* No version register in RK808 */
  	if (bootverbose && sc->type == RK805) {
  		err = rk805_read(dev, RK805_CHIP_NAME, data, 1);
  		if (err != 0) {
  			device_printf(dev, "Cannot read chip name reg\n");
  			return;
  		}
  		err = rk805_read(dev, RK805_CHIP_VER, data + 1, 1);
  		if (err != 0) {
  			device_printf(dev, "Cannot read chip version reg\n");
  			return;
  		}
  		device_printf(dev, "Chip Name: %x\n",
  		    data[0] << 4 | ((data[1] >> 4) & 0xf));
  		device_printf(dev, "Chip Version: %x\n", data[1] & 0xf);
  	}
  
  	config_intrhook_disestablish(&sc->intr_hook);
  }
  
  static int
  rk805_attach(device_t dev)
  {
  	struct rk805_softc *sc;
  	struct rk805_reg_sc *reg;
  	struct rk805_regdef *regdefs;
  	phandle_t rnode, child;
  	int i;
  
  	sc = device_get_softc(dev);
  
  	sc->intr_hook.ich_func = rk805_start;
  	sc->intr_hook.ich_arg = dev;
  
  	if (config_intrhook_establish(&sc->intr_hook) != 0)
  		return (ENOMEM);
  
  	sc->type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
  	switch (sc->type) {
  	case RK805:
  		regdefs = rk805_regdefs;
  		sc->nregs = nitems(rk805_regdefs);
  		break;
  	case RK808:
  		regdefs = rk808_regdefs;
  		sc->nregs = nitems(rk808_regdefs);
  		break;
  	default:
  		device_printf(dev, "Unknown type %d\n", sc->type);
  		return (ENXIO);
  	}
  
  	sc->regs = malloc(sizeof(struct rk805_reg_sc *) * sc->nregs,
  	    M_RK805_REG, M_WAITOK | M_ZERO);
  
  	rnode = ofw_bus_find_child(ofw_bus_get_node(dev), "regulators");
  	if (rnode > 0) {
  		for (i = 0; i < sc->nregs; i++) {
  			child = ofw_bus_find_child(rnode,
  			    regdefs[i].name);
  			if (child == 0)
  				continue;
  			reg = rk805_reg_attach(dev, child, &regdefs[i]);
  			if (reg == NULL) {
  				device_printf(dev,
  				    "cannot attach regulator %s\n",
  				    regdefs[i].name);
  				continue;
  			}
  			sc->regs[i] = reg;
  			if (bootverbose)
  				device_printf(dev, "Regulator %s attached\n",
  				    regdefs[i].name);
  		}
  	}
  
  	return (0);
  }
  
  static int
  rk805_detach(device_t dev)
  {
  
  	/* We cannot detach regulators */
  	return (EBUSY);
  }
  
  static int
  rk805_map(device_t dev, phandle_t xref, int ncells,
      pcell_t *cells, intptr_t *id)
  {
  	struct rk805_softc *sc;
  	int i;
  
  	sc = device_get_softc(dev);
  
  	for (i = 0; i < sc->nregs; i++) {
  		if (sc->regs[i]->xref == xref) {
  			*id = sc->regs[i]->def->id;
  			return (0);
  		}
  	}
  
  	return (ERANGE);
  }
  
  static device_method_t rk805_methods[] = {
  	DEVMETHOD(device_probe,		rk805_probe),
  	DEVMETHOD(device_attach,	rk805_attach),
  	DEVMETHOD(device_detach,	rk805_detach),
  
  	/* regdev interface */
  	DEVMETHOD(regdev_map,		rk805_map),
  	DEVMETHOD_END
  };
  
  static driver_t rk805_driver = {
  	"rk805_pmu",
  	rk805_methods,
  	sizeof(struct rk805_softc),
  };
  
  static devclass_t rk805_devclass;
  
  EARLY_DRIVER_MODULE(rk805, iicbus, rk805_driver, rk805_devclass, 0, 0,
      BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LAST);
  MODULE_DEPEND(rk805, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER);
  MODULE_VERSION(rk805, 1);
  