xref: /openbsd-src/sys/dev/fdt/rkpmic.c (revision 32a67d492cfdc7c31a8f25d7f6b7dbe72d1a282a)

/*	$OpenBSD: rkpmic.c,v 1.18 2024/11/23 21:24:03 kettenis Exp $	*/
/*
 * Copyright (c) 2017 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 <sys/proc.h>
#include <sys/signalvar.h>

#include <machine/fdt.h>

#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_regulator.h>
#include <dev/ofw/fdt.h>

#include <dev/i2c/i2cvar.h>
#include <dev/spi/spivar.h>

#include <dev/clock_subr.h>

extern void (*powerdownfn)(void);

#define RK80X_SECONDS		0x00
#define RK80X_MINUTES		0x01
#define RK80X_HOURS		0x02
#define RK80X_DAYS		0x03
#define RK80X_MONTHS		0x04
#define RK80X_YEARS		0x05
#define RK80X_WEEKS		0x06
#define RK80X_NRTC_REGS	7

#define RK805_RTC_CTRL		0x10
#define RK808_RTC_CTRL		0x10
#define RK809_RTC_CTRL		0x0d
#define  RK80X_RTC_CTRL_STOP_RTC	0x01

#define RK805_RTC_STATUS	0x11
#define RK808_RTC_STATUS	0x11
#define RK809_RTC_STATUS	0x0e
#define  RK80X_RTC_STATUS_POWER_UP	0x80

#define RK805_DEV_CTRL		0x4b
#define  RK805_DEV_CTRL_DEV_OFF	0x01

#define RK806_SYS_CFG3		0x72
#define  RK806_SYS_CFG3_DEV_OFF	0x01

#define RK808_DEVCTRL		0x4b
#define  RK808_DEVCTRL_DEV_OFF_RST	0x08

#define RK809_PMIC_SYS_CFG3	0xf4
#define  RK809_PMIC_SYS_CFG3_SLP_FUN_MASK	0x18
#define  RK809_PMIC_SYS_CFG3_SLP_FUN_NONE	0x00
#define  RK809_PMIC_SYS_CFG3_SLP_FUN_SLEEP	0x08
#define  RK809_PMIC_SYS_CFG3_DEV_OFF		0x01
#define RK809_PMIC_INT_STS0	0xf8
#define RK809_PMIC_INT_MSK0	0xf9
#define  RK809_PMIC_INT_MSK0_PWRON_FALL_INT_IM	0x01
#define RK809_PMIC_INT_STS1	0xfa
#define RK809_PMIC_INT_MSK1	0xfb
#define RK809_PMIC_INT_STS2	0xfc
#define RK809_PMIC_INT_MSK2	0xfd
#define RK809_PMIC_GPIO_INT_CONFIG	0xfe
#define  RK809_PMIC_GPIO_INT_CONFIG_INT_POL	0x02

#define RKSPI_CMD_READ		(0 << 7)
#define RKSPI_CMD_WRITE		(1 << 7)

struct rkpmic_vsel_range {
	uint32_t base, delta;
	uint8_t vsel_min, vsel_max;
};

struct rkpmic_regdata {
	const char *name;
	uint8_t vreg, vmask;
	uint8_t sreg, smask;
	const struct rkpmic_vsel_range *vsel_range;
};

/*
 * Used by RK805 for BUCK1, BUCK2
 *  0-59:	0.7125V-1.45V, step=12.5mV
 *  60-62:	1.8V-2.2V, step=200mV
 *  63:		2.3V
 */
const struct rkpmic_vsel_range rk805_vsel_range1[] = {
	{ 712500, 12500, 0, 59 },
	{ 1800000, 200000, 60, 62 },
	{ 2300000, 0, 63, 63 },
	{}
};

/*
 * Used by RK805 for BUCK4
 *  0-27:	0.8V-3.5V, step=100mV
 */
const struct rkpmic_vsel_range rk805_vsel_range2[] = {
	{ 800000, 100000, 0, 27 },
	{}
};

/*
 * Used by RK805 for LDO1-3
 *  0-26:	0.8V-3.4V, step=100mV
 */
const struct rkpmic_vsel_range rk805_vsel_range3[] = {
	{ 800000, 100000, 0, 26 },
	{}
};

const struct rkpmic_regdata rk805_regdata[] = {
	{ "DCDC_REG1", 0x2f, 0x3f, 0, 0, rk805_vsel_range1 },
	{ "DCDC_REG2", 0x33, 0x3f, 0, 0, rk805_vsel_range1 },
	{ "DCDC_REG4", 0x38, 0x1f, 0, 0, rk805_vsel_range2 },
	{ "LDO_REG1", 0x3b, 0x1f, 0, 0, rk805_vsel_range3 },
	{ "LDO_REG2", 0x3d, 0x1f, 0, 0, rk805_vsel_range3 },
	{ "LDO_REG3", 0x3f, 0x1f, 0, 0, rk805_vsel_range3 },
	{ }
};

/*
 * Used by RK806 for BUCK
 *  0-159:	0.5V-1.5V, step=6.25mV
 *  160-236:	1.5V-3.4V, step=25mV
 *  237-255:	3.4V-3.4V, step=0mV
 */
const struct rkpmic_vsel_range rk806_vsel_range1[] = {
	{ 500000, 6250, 0, 159 },
	{ 1500000, 25000, 160, 236 },
	{ 3400000, 0, 237, 255 },
	{}
};

/*
 * Used by RK806 for LDO
 *  0-232:	0.5V-3.4V, step=12.5mV
 *  233-255:	3.4V-3.4V, step=0mV
 */
const struct rkpmic_vsel_range rk806_vsel_range2[] = {
	{ 500000, 12500, 0, 232 },
	{ 3400000, 0, 233, 255 },
	{}
};

const struct rkpmic_regdata rk806_regdata[] = {
	{ "dcdc-reg1", 0x1a, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg2", 0x1b, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg3", 0x1c, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg4", 0x1d, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg5", 0x1e, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg6", 0x1f, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg7", 0x20, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg8", 0x21, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg9", 0x22, 0xff, 0, 0, rk806_vsel_range1 },
	{ "dcdc-reg10", 0x23, 0xff, 0, 0, rk806_vsel_range1 },
	{ "nldo-reg1", 0x43, 0xff, 0, 0, rk806_vsel_range2 },
	{ "nldo-reg2", 0x44, 0xff, 0, 0, rk806_vsel_range2 },
	{ "nldo-reg3", 0x45, 0xff, 0, 0, rk806_vsel_range2 },
	{ "nldo-reg4", 0x46, 0xff, 0, 0, rk806_vsel_range2 },
	{ "nldo-reg5", 0x47, 0xff, 0, 0, rk806_vsel_range2 },
	{ "pldo-reg1", 0x4e, 0xff, 0, 0, rk806_vsel_range2 },
	{ "pldo-reg2", 0x4f, 0xff, 0, 0, rk806_vsel_range2 },
	{ "pldo-reg3", 0x50, 0xff, 0, 0, rk806_vsel_range2 },
	{ "pldo-reg4", 0x51, 0xff, 0, 0, rk806_vsel_range2 },
	{ "pldo-reg5", 0x52, 0xff, 0, 0, rk806_vsel_range2 },
	{ "pldo-reg6", 0x53, 0xff, 0, 0, rk806_vsel_range2 },
	{ }
};

/*
 * Used by RK808 for BUCK1 & BUCK2
 *  0-63:	0.7125V-1.5V, step=12.5mV
 */
const struct rkpmic_vsel_range rk808_vsel_range1[] = {
	{ 712500, 12500, 0, 63 },
	{}
};

/*
 * Used by RK808 for BUCK4
 *  0-15:	1.8V-3.3V,step=100mV
 */
const struct rkpmic_vsel_range rk808_vsel_range2[] = {
	{ 1800000, 100000, 0, 15 },
	{}
};

/*
 * Used by RK808 for LDO1-2, 4-5, 8
 *  0-16:	1.8V-3.4V, step=100mV
 */
const struct rkpmic_vsel_range rk808_vsel_range3[] = {
	{ 1800000, 100000, 0, 16 },
	{}
};

/*
 * Used by RK808 for LDO3
 *   0-12:	0.8V~2.0V, step=100mV
 *   13:	2.2V
 *   15:	2.5V
 */
const struct rkpmic_vsel_range rk808_vsel_range4[] = {
	{ 800000, 100000, 0, 12 },
	{ 2200000, 0, 13, 13 },
	{ 2500000, 0, 15, 15 },
	{}
};

/*
 * Used by RK808 for LDO6-7
 *  0-17:	0.8V-2.5V,step=100mV
 */
const struct rkpmic_vsel_range rk808_vsel_range5[] = {
	{ 800000, 100000, 0, 17 },
	{}
};

const struct rkpmic_regdata rk808_regdata[] = {
	{ "DCDC_REG1", 0x2f, 0x3f, 0, 0, rk808_vsel_range1 },
	{ "DCDC_REG2", 0x33, 0x3f, 0, 0, rk808_vsel_range1 },
	{ "DCDC_REG4", 0x38, 0x0f, 0, 0, rk808_vsel_range2 },
	{ "LDO_REG1", 0x3b, 0x1f, 0, 0, rk808_vsel_range3 },
	{ "LDO_REG2", 0x3d, 0x1f, 0, 0, rk808_vsel_range3 },
	{ "LDO_REG3", 0x3f, 0x0f, 0, 0, rk808_vsel_range4 },
	{ "LDO_REG4", 0x41, 0x1f, 0, 0, rk808_vsel_range3 },
	{ "LDO_REG5", 0x43, 0x1f, 0, 0, rk808_vsel_range3 },
	{ "LDO_REG6", 0x45, 0x1f, 0, 0, rk808_vsel_range5 },
	{ "LDO_REG7", 0x47, 0x1f, 0, 0, rk808_vsel_range5 },
	{ "LDO_REG8", 0x49, 0x1f, 0, 0, rk808_vsel_range3 },
	{ }
};

/*
 * Used by RK809 for BUCK1-3
 *  0-80:	0.5V-1.5V,step=12.5mV
 *  81-89:	1.6V-2.4V,step=100mV
 */
const struct rkpmic_vsel_range rk809_vsel_range1[] = {
	{ 500000, 12500, 0, 80 },
	{ 1600000, 100000, 81, 89 },
	{}
};

/*
 * Used by RK809 for BUCK4
 *  0-80:	0.5V-1.5V,step=12.5mV
 *  81-99:	1.6V-3.4V,step=100mV
 */
const struct rkpmic_vsel_range rk809_vsel_range2[] = {
	{ 500000, 12500, 0, 80 },
	{ 1600000, 100000, 81, 99 },
	{}
};

/*
 * Used by RK809 for BUCK5
 *  0:		1.5V
 *  1-3:	1.8V-2.2V,step=200mV
 *  4-5:	2.8V-3.0V,step=200mV
 *  6-7:	3.3V-3.6V,step=300mV
 */
const struct rkpmic_vsel_range rk809_vsel_range3[] = {
	{ 1500000, 0, 0, 0 },
	{ 1800000, 200000, 1, 3 },
	{ 2800000, 200000, 4, 5 },
	{ 3300000, 300000, 6, 7 },
	{}
};

/*
 * Used by RK809 for LDO1-7
 *  0-112: 0.6V-3.4V,step=25mV
 */
const struct rkpmic_vsel_range rk809_vsel_range4[] = {
	{ 600000, 25000, 0, 112 },
	{}
};

const struct rkpmic_regdata rk809_regdata[] = {
	{ "DCDC_REG1", 0xbb, 0x7f, 0xb5, 0x01, rk809_vsel_range1 },
	{ "DCDC_REG2", 0xbe, 0x7f, 0xb5, 0x02, rk809_vsel_range1 },
	{ "DCDC_REG3", 0xc1, 0x7f, 0xb5, 0x04, rk809_vsel_range1 },
	{ "DCDC_REG4", 0xc4, 0x7f, 0xb5, 0x08, rk809_vsel_range2 },
	{ "DCDC_REG5", 0xde, 0x0f, 0xb5, 0x20, rk809_vsel_range3 },
	{ "LDO_REG1", 0xcc, 0x7f, 0xb6, 0x01, rk809_vsel_range4 },
	{ "LDO_REG2", 0xce, 0x7f, 0xb6, 0x02, rk809_vsel_range4 },
	{ "LDO_REG3", 0xd0, 0x7f, 0xb6, 0x04, rk809_vsel_range4 },
	{ "LDO_REG4", 0xd2, 0x7f, 0xb6, 0x08, rk809_vsel_range4 },
	{ "LDO_REG5", 0xd4, 0x7f, 0xb6, 0x10, rk809_vsel_range4 },
	{ "LDO_REG6", 0xd6, 0x7f, 0xb6, 0x20, rk809_vsel_range4 },
	{ "LDO_REG7", 0xd8, 0x7f, 0xb6, 0x40, rk809_vsel_range4 },
	{ "LDO_REG8", 0xda, 0x7f, 0xb6, 0x80, rk809_vsel_range4 },
	{ "LDO_REG9", 0xdc, 0x7f, 0xb5, 0x10, rk809_vsel_range4 },
	{ "SWITCH_REG1", 0, 0, 0xb5, 0x40, NULL },
	{ "SWITCH_REG2", 0, 0, 0xb5, 0x80, NULL },
	{ }
};

/*
 * Used by RK817 for BOOST
 *  0-7: 4.7V-5.4V,step=100mV
 */
const struct rkpmic_vsel_range rk817_boost_range[] = {
	{ 4700000, 100000, 0, 7 },
	{}
};

const struct rkpmic_regdata rk817_regdata[] = {
	{ "DCDC_REG1", 0xbb, 0x7f, 0, 0, rk809_vsel_range1 },
	{ "DCDC_REG2", 0xbe, 0x7f, 0, 0, rk809_vsel_range1 },
	{ "DCDC_REG3", 0xc1, 0x7f, 0, 0, rk809_vsel_range1 },
	{ "DCDC_REG4", 0xc4, 0x7f, 0, 0, rk809_vsel_range2 },
	{ "LDO_REG1", 0xcc, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "LDO_REG2", 0xce, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "LDO_REG3", 0xd0, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "LDO_REG4", 0xd2, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "LDO_REG5", 0xd4, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "LDO_REG6", 0xd6, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "LDO_REG7", 0xd8, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "LDO_REG8", 0xda, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "LDO_REG9", 0xdc, 0x7f, 0, 0, rk809_vsel_range4 },
	{ "BOOST", 0xde, 0x07, 0, 0, rk817_boost_range },
	{ }
};

struct rkpmic_softc {
	struct device sc_dev;
	int sc_node;

	i2c_tag_t sc_i2c_tag;
	i2c_addr_t sc_i2c_addr;
	spi_tag_t sc_spi_tag;
	struct spi_config sc_spi_conf;

	int sc_rtc_ctrl_reg, sc_rtc_status_reg;
	uint8_t sc_dev_ctrl_reg, sc_dev_off_val;

	struct todr_chip_handle sc_todr;
	const struct rkpmic_regdata *sc_regdata;

	int (*sc_read)(struct rkpmic_softc *, uint8_t, void *, size_t);
	int (*sc_write)(struct rkpmic_softc *, uint8_t, void *, size_t);

	void *sc_ih;
};

int	rkpmic_i2c_match(struct device *, void *, void *);
void	rkpmic_i2c_attach(struct device *, struct device *, void *);
int	rkpmic_i2c_read(struct rkpmic_softc *, uint8_t, void *, size_t);
int	rkpmic_i2c_write(struct rkpmic_softc *, uint8_t, void *, size_t);

int	rkpmic_spi_match(struct device *, void *, void *);
void	rkpmic_spi_attach(struct device *, struct device *, void *);
int	rkpmic_spi_read(struct rkpmic_softc *, uint8_t, void *, size_t);
int	rkpmic_spi_write(struct rkpmic_softc *, uint8_t, void *, size_t);

void	rkpmic_attach(struct device *, struct device *, void *);
int	rkpmic_activate(struct device *, int);

const struct cfattach rkpmic_i2c_ca = {
	sizeof(struct rkpmic_softc), rkpmic_i2c_match, rkpmic_i2c_attach,
	NULL, rkpmic_activate
};

const struct cfattach rkpmic_spi_ca = {
	sizeof(struct rkpmic_softc), rkpmic_spi_match, rkpmic_spi_attach
};

struct cfdriver rkpmic_cd = {
	NULL, "rkpmic", DV_DULL
};

int	rkpmic_intr(void *);
void	rkpmic_attach_regulator(struct rkpmic_softc *, int);
uint8_t	rkpmic_reg_read(struct rkpmic_softc *, int);
void	rkpmic_reg_write(struct rkpmic_softc *, int, uint8_t);
int	rkpmic_clock_read(struct rkpmic_softc *, struct clock_ymdhms *);
int	rkpmic_clock_write(struct rkpmic_softc *, struct clock_ymdhms *);
int	rkpmic_gettime(struct todr_chip_handle *, struct timeval *);
int	rkpmic_settime(struct todr_chip_handle *, struct timeval *);

struct rkpmic_softc *rkpmic_sc;
void    rkpmic_powerdown(void);

int
rkpmic_i2c_match(struct device *parent, void *match, void *aux)
{
	struct i2c_attach_args *ia = aux;

	return (strcmp(ia->ia_name, "rockchip,rk805") == 0 ||
	    strcmp(ia->ia_name, "rockchip,rk808") == 0 ||
	    strcmp(ia->ia_name, "rockchip,rk809") == 0 ||
	    strcmp(ia->ia_name, "rockchip,rk817") == 0);
}

void
rkpmic_i2c_attach(struct device *parent, struct device *self, void *aux)
{
	struct rkpmic_softc *sc = (struct rkpmic_softc *)self;
	struct i2c_attach_args *ia = aux;

	sc->sc_i2c_tag = ia->ia_tag;
	sc->sc_i2c_addr = ia->ia_addr;
	sc->sc_node = *(int *)ia->ia_cookie;
	sc->sc_read = rkpmic_i2c_read;
	sc->sc_write = rkpmic_i2c_write;

	rkpmic_attach(parent, self, aux);
}

int
rkpmic_spi_match(struct device *parent, void *match, void *aux)
{
	struct spi_attach_args *sa = aux;

	return (strcmp(sa->sa_name, "rockchip,rk806") == 0);
}

void
rkpmic_spi_attach(struct device *parent, struct device *self, void *aux)
{
	struct rkpmic_softc *sc = (struct rkpmic_softc *)self;
	struct spi_attach_args *sa = aux;

	sc->sc_spi_tag = sa->sa_tag;
	sc->sc_node = *(int *)sa->sa_cookie;
	sc->sc_read = rkpmic_spi_read;
	sc->sc_write = rkpmic_spi_write;

	sc->sc_spi_conf.sc_bpw = 8;
	sc->sc_spi_conf.sc_freq =
	    OF_getpropint(sc->sc_node, "spi-max-frequency", 1000000);
	sc->sc_spi_conf.sc_cs = OF_getpropint(sc->sc_node, "reg", 0);

	rkpmic_attach(parent, self, aux);
}

void
rkpmic_attach(struct device *parent, struct device *self, void *aux)
{
	struct rkpmic_softc *sc = (struct rkpmic_softc *)self;
	const char *chip;
	uint8_t val;
	int node;

	if (OF_is_compatible(sc->sc_node, "rockchip,rk805")) {
		chip = "RK805";
		sc->sc_rtc_ctrl_reg = RK805_RTC_CTRL;
		sc->sc_rtc_status_reg = RK805_RTC_STATUS;
		sc->sc_dev_ctrl_reg = RK805_DEV_CTRL;
		sc->sc_dev_off_val = RK805_DEV_CTRL_DEV_OFF;
		sc->sc_regdata = rk805_regdata;
	} else if (OF_is_compatible(sc->sc_node, "rockchip,rk806")) {
		chip = "RK806";
		sc->sc_dev_ctrl_reg = RK806_SYS_CFG3;
		sc->sc_dev_off_val = RK806_SYS_CFG3_DEV_OFF;
		sc->sc_regdata = rk806_regdata;
	} else if (OF_is_compatible(sc->sc_node, "rockchip,rk808")) {
		chip = "RK808";
		sc->sc_rtc_ctrl_reg = RK808_RTC_CTRL;
		sc->sc_rtc_status_reg = RK808_RTC_STATUS;
		sc->sc_dev_ctrl_reg = RK808_DEVCTRL;
		sc->sc_dev_off_val = RK808_DEVCTRL_DEV_OFF_RST;
		sc->sc_regdata = rk808_regdata;
	} else if (OF_is_compatible(sc->sc_node, "rockchip,rk809")) {
		chip = "RK809";
		sc->sc_rtc_ctrl_reg = RK809_RTC_CTRL;
		sc->sc_rtc_status_reg = RK809_RTC_STATUS;
		sc->sc_dev_ctrl_reg = RK809_PMIC_SYS_CFG3;
		sc->sc_dev_off_val = RK809_PMIC_SYS_CFG3_DEV_OFF;
		sc->sc_regdata = rk809_regdata;
	} else {
		chip = "RK817";
		sc->sc_rtc_ctrl_reg = RK809_RTC_CTRL;
		sc->sc_rtc_status_reg = RK809_RTC_STATUS;
		sc->sc_dev_ctrl_reg = RK809_PMIC_SYS_CFG3;
		sc->sc_dev_off_val = RK809_PMIC_SYS_CFG3_DEV_OFF;
		sc->sc_regdata = rk817_regdata;
	}
	printf(": %s\n", chip);

	if (sc->sc_rtc_ctrl_reg) {
		sc->sc_todr.cookie = sc;
		sc->sc_todr.todr_gettime = rkpmic_gettime;
		sc->sc_todr.todr_settime = rkpmic_settime;
		sc->sc_todr.todr_quality = 0;
		todr_attach(&sc->sc_todr);
	}

	node = OF_getnodebyname(sc->sc_node, "regulators");
	if (node == 0)
		return;
	for (node = OF_child(node); node; node = OF_peer(node))
		rkpmic_attach_regulator(sc, node);

	if (OF_is_compatible(sc->sc_node, "rockchip,rk809")) {
		/* Mask all interrupts. */
		rkpmic_reg_write(sc, RK809_PMIC_INT_MSK0, 0xff);
		rkpmic_reg_write(sc, RK809_PMIC_INT_MSK1, 0xff);
		rkpmic_reg_write(sc, RK809_PMIC_INT_MSK2, 0xff);

		/* Ack all interrupts. */
		rkpmic_reg_write(sc, RK809_PMIC_INT_STS0, 0xff);
		rkpmic_reg_write(sc, RK809_PMIC_INT_STS1, 0xff);
		rkpmic_reg_write(sc, RK809_PMIC_INT_STS2, 0xff);

		/* Set interrupt pin to active-low. */
		val = rkpmic_reg_read(sc, RK809_PMIC_GPIO_INT_CONFIG);
		rkpmic_reg_write(sc, RK809_PMIC_GPIO_INT_CONFIG,
		    val & ~RK809_PMIC_GPIO_INT_CONFIG_INT_POL);

		sc->sc_ih = fdt_intr_establish(sc->sc_node, IPL_TTY,
		    rkpmic_intr, sc, sc->sc_dev.dv_xname);

		/* Unmask power button interrupt. */
		rkpmic_reg_write(sc, RK809_PMIC_INT_MSK0,
		    ~RK809_PMIC_INT_MSK0_PWRON_FALL_INT_IM);

#ifdef SUSPEND
		if (OF_getpropbool(sc->sc_node, "wakeup-source"))
			device_register_wakeup(&sc->sc_dev);
#endif
	}

	if (OF_getpropbool(sc->sc_node, "system-power-controller") ||
	    OF_getpropbool(sc->sc_node, "rockchip,system-power-controller")) {
		rkpmic_sc = sc;
		powerdownfn = rkpmic_powerdown;
	}
}

int
rkpmic_activate(struct device *self, int act)
{
	struct rkpmic_softc *sc = (struct rkpmic_softc *)self;
	uint8_t val;

	switch (act) {
	case DVACT_SUSPEND:
		if (OF_is_compatible(sc->sc_node, "rockchip,rk809")) {
			val = rkpmic_reg_read(sc, RK809_PMIC_SYS_CFG3);
			val &= ~RK809_PMIC_SYS_CFG3_SLP_FUN_MASK;
			val |= RK809_PMIC_SYS_CFG3_SLP_FUN_SLEEP;
			rkpmic_reg_write(sc, RK809_PMIC_SYS_CFG3, val);
		}
		break;
	case DVACT_RESUME:
		if (OF_is_compatible(sc->sc_node, "rockchip,rk809")) {
			val = rkpmic_reg_read(sc, RK809_PMIC_SYS_CFG3);
			val &= ~RK809_PMIC_SYS_CFG3_SLP_FUN_MASK;
			val |= RK809_PMIC_SYS_CFG3_SLP_FUN_NONE;
			rkpmic_reg_write(sc, RK809_PMIC_SYS_CFG3, val);
			rkpmic_reg_write(sc, RK809_PMIC_INT_STS0, 0xff);
		}
		break;
	}

	return 0;
}

int
rkpmic_intr(void *arg)
{
	extern int allowpowerdown;
	struct rkpmic_softc *sc = arg;

	if (allowpowerdown) {
		allowpowerdown = 0;
		prsignal(initprocess, SIGUSR2);
	}

	rkpmic_reg_write(sc, RK809_PMIC_INT_STS0, 0xff);
	return 1;
}

void
rkpmic_powerdown(void)
{
	struct rkpmic_softc *sc = rkpmic_sc;
	rkpmic_reg_write(sc, sc->sc_dev_ctrl_reg,
	    rkpmic_reg_read(sc, sc->sc_dev_ctrl_reg) | sc->sc_dev_off_val);
}

struct rkpmic_regulator {
	struct rkpmic_softc *rr_sc;

	uint8_t rr_vreg, rr_vmask;
	const struct rkpmic_vsel_range *rr_vsel_range;

	struct regulator_device rr_rd;
};

uint32_t rkpmic_get_voltage(void *);
int	rkpmic_set_voltage(void *, uint32_t);
int	rkpmic_do_set_voltage(struct rkpmic_regulator *, uint32_t, int);

void
rkpmic_attach_regulator(struct rkpmic_softc *sc, int node)
{
	struct rkpmic_regulator *rr;
	char name[32];
	uint32_t voltage;
	int i, snode;
	uint8_t val;

	name[0] = 0;
	OF_getprop(node, "name", name, sizeof(name));
	name[sizeof(name) - 1] = 0;
	for (i = 0; sc->sc_regdata[i].name; i++) {
		if (strcmp(sc->sc_regdata[i].name, name) == 0)
			break;
	}
	if (sc->sc_regdata[i].name == NULL)
		return;

	rr = malloc(sizeof(*rr), M_DEVBUF, M_WAITOK | M_ZERO);
	rr->rr_sc = sc;

	rr->rr_vreg = sc->sc_regdata[i].vreg;
	rr->rr_vmask = sc->sc_regdata[i].vmask;
	rr->rr_vsel_range = sc->sc_regdata[i].vsel_range;

	rr->rr_rd.rd_node = node;
	rr->rr_rd.rd_cookie = rr;
	rr->rr_rd.rd_get_voltage = rkpmic_get_voltage;
	rr->rr_rd.rd_set_voltage = rkpmic_set_voltage;
	regulator_register(&rr->rr_rd);

	if (sc->sc_regdata[i].smask) {
		snode = OF_getnodebyname(node, "regulator-state-mem");
		if (snode) {
			val = rkpmic_reg_read(sc, sc->sc_regdata[i].sreg);
			if (OF_getpropbool(snode, "regulator-on-in-suspend"))
				val |= sc->sc_regdata[i].smask;
			if (OF_getpropbool(snode, "regulator-off-in-suspend"))
				val &= ~sc->sc_regdata[i].smask;
			rkpmic_reg_write(sc, sc->sc_regdata[i].sreg, val);

			voltage = OF_getpropint(snode,
			    "regulator-suspend-min-microvolt", 0);
			voltage = OF_getpropint(snode,
			    "regulator-suspend-microvolt", voltage);
			if (voltage > 0)
				rkpmic_do_set_voltage(rr, voltage, 1);
		}
	}
}

uint32_t
rkpmic_get_voltage(void *cookie)
{
	struct rkpmic_regulator *rr = cookie;
	const struct rkpmic_vsel_range *vsel_range = rr->rr_vsel_range;
	uint8_t vsel;
	uint32_t ret = 0;

	if (vsel_range == NULL)
		return 0;

	vsel = rkpmic_reg_read(rr->rr_sc, rr->rr_vreg) & rr->rr_vmask;

	while (vsel_range->base) {
		ret = vsel_range->base;
		if (vsel >= vsel_range->vsel_min &&
		    vsel <= vsel_range->vsel_max) {
			ret += (vsel - vsel_range->vsel_min) *
			    vsel_range->delta;
			break;
		} else
			ret += (vsel_range->vsel_max - vsel_range->vsel_min) *
			    vsel_range->delta;
		vsel_range++;

	}

	return ret;
}

int
rkpmic_set_voltage(void *cookie, uint32_t voltage)
{
	return rkpmic_do_set_voltage(cookie, voltage, 0);
}

int
rkpmic_do_set_voltage(struct rkpmic_regulator *rr, uint32_t voltage, int sleep)
{
	const struct rkpmic_vsel_range *vsel_range = rr->rr_vsel_range;
	uint32_t vmin, vmax, volt;
	uint8_t reg, vsel;

	if (vsel_range == NULL)
		return ENODEV;

	while (vsel_range->base) {
		vmin = vsel_range->base;
		vmax = vmin + (vsel_range->vsel_max - vsel_range->vsel_min) *
		    vsel_range->delta;
		if (voltage < vmin)
			return EINVAL;
		if (voltage <= vmax) {
			vsel = vsel_range->vsel_min;
			volt = vsel_range->base;
			while (vsel <= vsel_range->vsel_max) {
				if (volt == voltage)
					break;
				else {
					vsel++;
					volt += vsel_range->delta;
				}
			}
			if (volt != voltage)
				return EINVAL;
			break;
		}
		vsel_range++;
	}

	if (vsel_range->base == 0)
		return EINVAL;

	reg = rkpmic_reg_read(rr->rr_sc, rr->rr_vreg + sleep);
	reg &= ~rr->rr_vmask;
	reg |= vsel;
	rkpmic_reg_write(rr->rr_sc, rr->rr_vreg + sleep, reg);

	return 0;
}

int
rkpmic_gettime(struct todr_chip_handle *handle, struct timeval *tv)
{
	struct rkpmic_softc *sc = handle->cookie;
	struct clock_ymdhms dt;
	time_t secs;
	int error;

	error = rkpmic_clock_read(sc, &dt);
	if (error)
		return error;

	if (dt.dt_sec > 59 || dt.dt_min > 59 || dt.dt_hour > 23 ||
	    dt.dt_day > 31 || dt.dt_day == 0 ||
	    dt.dt_mon > 12 || dt.dt_mon == 0 ||
	    dt.dt_year < POSIX_BASE_YEAR)
		return EINVAL;

	/*
	 * The RTC thinks November has 31 days.  Match what Linux does
	 * and undo the damage by considering the calendars to be in
	 * sync on January 1st 2016.
	 */
	secs = clock_ymdhms_to_secs(&dt);
	secs += (dt.dt_year - 2016 + (dt.dt_mon == 12 ? 1 : 0)) * 86400;

	tv->tv_sec = secs;
	tv->tv_usec = 0;
	return 0;
}

int
rkpmic_settime(struct todr_chip_handle *handle, struct timeval *tv)
{
	struct rkpmic_softc *sc = handle->cookie;
	struct clock_ymdhms dt;
	time_t secs;

	/*
	 * Take care of the November 31st braindamage here as well.
	 * Don't try to be clever, just do the conversion in two
	 * steps, first taking care of November 31 in previous years,
	 * and then taking care of days in December of the current
	 * year.  December 1st turns into November 31st!
	 */
	secs = tv->tv_sec;
	clock_secs_to_ymdhms(secs, &dt);
	secs -= (dt.dt_year - 2016) * 86400;
	clock_secs_to_ymdhms(secs, &dt);
	if (dt.dt_mon == 12) {
		dt.dt_day--;
		if (dt.dt_day == 0) {
			dt.dt_mon = 11;
			dt.dt_day = 31;
		}
	}

	return rkpmic_clock_write(sc, &dt);
}

uint8_t
rkpmic_reg_read(struct rkpmic_softc *sc, int reg)
{
	uint8_t cmd = reg;
	uint8_t val;

	if (sc->sc_read(sc, cmd, &val, sizeof(val))) {
		printf("%s: can't read register 0x%02x\n",
		    sc->sc_dev.dv_xname, reg);
		val = 0xff;
	}

	return val;
}

void
rkpmic_reg_write(struct rkpmic_softc *sc, int reg, uint8_t val)
{
	uint8_t cmd = reg;

	if (sc->sc_write(sc, cmd, &val, sizeof(val))) {
		printf("%s: can't write register 0x%02x\n",
		    sc->sc_dev.dv_xname, reg);
	}
}

int
rkpmic_clock_read(struct rkpmic_softc *sc, struct clock_ymdhms *dt)
{
	uint8_t regs[RK80X_NRTC_REGS];
	uint8_t cmd = RK80X_SECONDS;
	uint8_t status;
	int error;

	error = sc->sc_read(sc, cmd, regs, RK80X_NRTC_REGS);

	if (error) {
		printf("%s: can't read RTC\n", sc->sc_dev.dv_xname);
		return error;
	}

	/*
	 * Convert the RK80x's register values into something useable.
	 */
	dt->dt_sec = FROMBCD(regs[0]);
	dt->dt_min = FROMBCD(regs[1]);
	dt->dt_hour = FROMBCD(regs[2]);
	dt->dt_day = FROMBCD(regs[3]);
	dt->dt_mon = FROMBCD(regs[4]);
	dt->dt_year = FROMBCD(regs[5]) + 2000;

	/* Consider the time to be invalid if the POWER_UP bit is set. */
	status = rkpmic_reg_read(sc, sc->sc_rtc_status_reg);
	if (status & RK80X_RTC_STATUS_POWER_UP)
		return EINVAL;

	return 0;
}

int
rkpmic_clock_write(struct rkpmic_softc *sc, struct clock_ymdhms *dt)
{
	uint8_t regs[RK80X_NRTC_REGS];
	uint8_t cmd = RK80X_SECONDS;
	int error;

	/*
	 * Convert our time representation into something the RK80x
	 * can understand.
	 */
	regs[0] = TOBCD(dt->dt_sec);
	regs[1] = TOBCD(dt->dt_min);
	regs[2] = TOBCD(dt->dt_hour);
	regs[3] = TOBCD(dt->dt_day);
	regs[4] = TOBCD(dt->dt_mon);
	regs[5] = TOBCD(dt->dt_year - 2000);
	regs[6] = TOBCD(dt->dt_wday);

	/* Stop RTC such that we can write to it. */
	rkpmic_reg_write(sc, sc->sc_rtc_ctrl_reg, RK80X_RTC_CTRL_STOP_RTC);

	error = sc->sc_write(sc, cmd, regs, RK80X_NRTC_REGS);

	/* Restart RTC. */
	rkpmic_reg_write(sc, sc->sc_rtc_ctrl_reg, 0);

	if (error) {
		printf("%s: can't write RTC\n", sc->sc_dev.dv_xname);
		return error;
	}

	/* Clear POWER_UP bit to indicate the time is now valid. */
	rkpmic_reg_write(sc, sc->sc_rtc_status_reg, RK80X_RTC_STATUS_POWER_UP);

	return 0;
}

int
rkpmic_i2c_read(struct rkpmic_softc *sc, uint8_t cmd, void *buf, size_t buflen)
{
	int error;

	iic_acquire_bus(sc->sc_i2c_tag, I2C_F_POLL);
	error = iic_exec(sc->sc_i2c_tag, I2C_OP_READ_WITH_STOP,
	    sc->sc_i2c_addr, &cmd, sizeof(cmd), buf, buflen, I2C_F_POLL);
	iic_release_bus(sc->sc_i2c_tag, I2C_F_POLL);

	return error;
}

int
rkpmic_i2c_write(struct rkpmic_softc *sc, uint8_t cmd, void *buf, size_t buflen)
{
	int error;

	iic_acquire_bus(sc->sc_i2c_tag, I2C_F_POLL);
	error = iic_exec(sc->sc_i2c_tag, I2C_OP_WRITE_WITH_STOP,
	    sc->sc_i2c_addr, &cmd, sizeof(cmd), buf, buflen, I2C_F_POLL);
	iic_release_bus(sc->sc_i2c_tag, I2C_F_POLL);

	return error;
}

int
rkpmic_spi_read(struct rkpmic_softc *sc, uint8_t cmd, void *buf, size_t buflen)
{
	uint8_t cmdbuf[3];
	int error;

	cmdbuf[0] = RKSPI_CMD_READ | (buflen - 1);
	cmdbuf[1] = cmd;  /* 16-bit addr low */
	cmdbuf[2] = 0x00; /* 16-bit addr high */

	spi_acquire_bus(sc->sc_spi_tag, 0);
	spi_config(sc->sc_spi_tag, &sc->sc_spi_conf);
	error = spi_transfer(sc->sc_spi_tag, cmdbuf, NULL, sizeof(cmdbuf),
	    SPI_KEEP_CS);
	if (!error)
		error = spi_read(sc->sc_spi_tag, buf, buflen);
	spi_release_bus(sc->sc_spi_tag, 0);

	return error;
}

int
rkpmic_spi_write(struct rkpmic_softc *sc, uint8_t cmd, void *buf, size_t buflen)
{
	uint8_t cmdbuf[3];
	int error;

	cmdbuf[0] = RKSPI_CMD_WRITE | (buflen - 1);
	cmdbuf[1] = cmd;  /* 16-bit addr low */
	cmdbuf[2] = 0x00; /* 16-bit addr high */

	spi_acquire_bus(sc->sc_spi_tag, 0);
	spi_config(sc->sc_spi_tag, &sc->sc_spi_conf);
	error = spi_transfer(sc->sc_spi_tag, cmdbuf, NULL, sizeof(cmdbuf),
	    SPI_KEEP_CS);
	if (!error)
		error = spi_write(sc->sc_spi_tag, buf, buflen);
	spi_release_bus(sc->sc_spi_tag, 0);

	return error;
}