drivers:power:max77693: add support for new multi function pmic max77693

This patch add support for new multi function pmic max77693.
The driver is split into three modules: pmic, muic and fuelgage.

Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

Makefile

@@ -284,6 +284,7 @@ LIBS-y += drivers/pci/libpci.o
 LIBS-y += drivers/pcmcia/libpcmcia.o
 LIBS-y += drivers/power/libpower.o \
 	drivers/power/fuel_gauge/libfuel_gauge.o \
+	drivers/power/mfd/libmfd.o \
 	drivers/power/pmic/libpmic.o \
 	drivers/power/battery/libbattery.o
 LIBS-y += drivers/spi/libspi.o

drivers/power/mfd/Makefile

@@ -0,0 +1,33 @@
+#
+# Copyright (C) 2013 Samsung Electronics
+# Piotr Wilczek <p.wilczek@samsung.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	:= $(obj)libmfd.o
+
+COBJS-$(CONFIG_POWER_PMIC_MAX77693) += pmic_max77693.o
+COBJS-$(CONFIG_POWER_MUIC_MAX77693) += muic_max77693.o
+COBJS-$(CONFIG_POWER_FG_MAX77693) += fg_max77693.o
+
+COBJS	:= $(COBJS-y)
+SRCS	:= $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+
+all:	$(LIB)
+
+$(LIB):	$(obj).depend $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+########################################################################

drivers/power/mfd/fg_max77693.c

@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics
+ * Piotr Wilczek <p.wilczek@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <power/pmic.h>
+#include <power/max77693_fg.h>
+#include <i2c.h>
+#include <power/power_chrg.h>
+#include <power/battery.h>
+#include <power/fg_battery_cell_params.h>
+#include <errno.h>
+
+static int max77693_get_vcell(u32 *vcell)
+{
+	u16 value;
+	u8 ret;
+
+	ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VCELL, 1,
+		       (u8 *)&value, 2);
+	if (ret)
+		return ret;
+
+	*vcell = (u32)(value >> 3);
+	*vcell = *vcell * 625;
+
+	return 0;
+}
+
+static int max77693_get_soc(u32 *soc)
+{
+	u16 value;
+	u8 ret;
+
+	ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VFSOC, 1,
+		       (u8 *)&value, 2);
+	if (ret)
+		return ret;
+
+	*soc = (u32)(value >> 8);
+
+	return 0;
+}
+
+static int power_update_battery(struct pmic *p, struct pmic *bat)
+{
+	struct power_battery *pb = bat->pbat;
+	int ret;
+
+	if (pmic_probe(p)) {
+		puts("Can't find max77693 fuel gauge\n");
+		return -1;
+	}
+
+	ret = max77693_get_soc(&pb->bat->state_of_chrg);
+	if (ret)
+		return ret;
+
+	max77693_get_vcell(&pb->bat->voltage_uV);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int power_check_battery(struct pmic *p, struct pmic *bat)
+{
+	struct power_battery *pb = bat->pbat;
+	unsigned int val;
+	int ret = 0;
+
+	if (pmic_probe(p)) {
+		puts("Can't find max77693 fuel gauge\n");
+		return -1;
+	}
+
+	ret = pmic_reg_read(p, MAX77693_STATUS, &val);
+	if (ret)
+		return ret;
+	debug("fg status: 0x%x\n", val);
+
+	ret = pmic_reg_read(p, MAX77693_VERSION, &pb->bat->version);
+	if (ret)
+		return ret;
+
+	ret = power_update_battery(p, bat);
+	if (ret)
+		return ret;
+	debug("fg ver: 0x%x\n", pb->bat->version);
+	printf("BAT: state_of_charge(SOC):%d%%\n",
+	       pb->bat->state_of_chrg);
+
+	printf("     voltage: %d.%6.6d [V] (expected to be %d [mAh])\n",
+	       pb->bat->voltage_uV / 1000000,
+	       pb->bat->voltage_uV % 1000000,
+	       pb->bat->capacity);
+
+	if (pb->bat->voltage_uV > 3850000)
+		pb->bat->state = EXT_SOURCE;
+	else if (pb->bat->voltage_uV < 3600000 || pb->bat->state_of_chrg < 5)
+		pb->bat->state = CHARGE;
+	else
+		pb->bat->state = NORMAL;
+
+	return 0;
+}
+
+static struct power_fg power_fg_ops = {
+	.fg_battery_check = power_check_battery,
+	.fg_battery_update = power_update_battery,
+};
+
+int power_fg_init(unsigned char bus)
+{
+	static const char name[] = "MAX77693_FG";
+	struct pmic *p = pmic_alloc();
+
+	if (!p) {
+		printf("%s: POWER allocation error!\n", __func__);
+		return -ENOMEM;
+	}
+
+	debug("Board Fuel Gauge init\n");
+
+	p->name = name;
+	p->interface = PMIC_I2C;
+	p->number_of_regs = FG_NUM_OF_REGS;
+	p->hw.i2c.addr = MAX77693_FUEL_I2C_ADDR;
+	p->hw.i2c.tx_num = 2;
+	p->sensor_byte_order = PMIC_SENSOR_BYTE_ORDER_BIG;
+	p->bus = bus;
+
+	p->fg = &power_fg_ops;
+
+	return 0;
+}

drivers/power/mfd/muic_max77693.c

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics
+ * Piotr Wilczek <p.wilczek@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <power/pmic.h>
+#include <power/power_chrg.h>
+#include <power/max77693_muic.h>
+#include <i2c.h>
+#include <errno.h>
+
+static int power_chrg_get_type(struct pmic *p)
+{
+	unsigned int val;
+	unsigned int charge_type, charger;
+
+	/* if probe failed, return cable none */
+	if (pmic_probe(p))
+		return CHARGER_NO;
+
+	pmic_reg_read(p, MAX77693_MUIC_STATUS2, &val);
+
+	charge_type = val & MAX77693_MUIC_CHG_MASK;
+
+	switch (charge_type) {
+	case MAX77693_MUIC_CHG_NO:
+		charger = CHARGER_NO;
+		break;
+	case MAX77693_MUIC_CHG_USB:
+	case MAX77693_MUIC_CHG_USB_D:
+		charger = CHARGER_USB;
+		break;
+	case MAX77693_MUIC_CHG_TA:
+	case MAX77693_MUIC_CHG_TA_1A:
+		charger = CHARGER_TA;
+		break;
+	case MAX77693_MUIC_CHG_TA_500:
+		charger = CHARGER_TA_500;
+		break;
+	default:
+		charger = CHARGER_UNKNOWN;
+		break;
+	}
+
+	return charger;
+}
+
+static struct power_chrg power_chrg_muic_ops = {
+	.chrg_type = power_chrg_get_type,
+};
+
+int power_muic_init(unsigned int bus)
+{
+	static const char name[] = "MAX77693_MUIC";
+	struct pmic *p = pmic_alloc();
+
+	if (!p) {
+		printf("%s: POWER allocation error!\n", __func__);
+		return -ENOMEM;
+	}
+
+	debug("Board Micro USB Interface Controller init\n");
+
+	p->name = name;
+	p->interface = PMIC_I2C;
+	p->number_of_regs = MUIC_NUM_OF_REGS;
+	p->hw.i2c.addr = MAX77693_MUIC_I2C_ADDR;
+	p->hw.i2c.tx_num = 1;
+	p->bus = bus;
+
+	p->chrg = &power_chrg_muic_ops;
+
+	return 0;
+}

drivers/power/mfd/pmic_max77693.c

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics
+ * Piotr Wilczek <p.wilczek@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <power/pmic.h>
+#include <power/max77693_pmic.h>
+#include <i2c.h>
+#include <errno.h>
+
+static int max77693_charger_state(struct pmic *p, int state, int current)
+{
+	unsigned int val;
+
+	if (pmic_probe(p))
+		return -1;
+
+	/* unlock write capability */
+	val = MAX77693_CHG_UNLOCK;
+	pmic_reg_write(p, MAX77693_CHG_CNFG_06, val);
+
+	if (state == CHARGER_DISABLE) {
+		puts("Disable the charger.\n");
+		pmic_reg_read(p, MAX77693_CHG_CNFG_00, &val);
+		val &= ~0x01;
+		pmic_reg_write(p, MAX77693_CHG_CNFG_00, val);
+		return -1;
+	}
+
+	if (current < CHARGER_MIN_CURRENT || current > CHARGER_MAX_CURRENT) {
+		printf("%s: Wrong charge current: %d [mA]\n",
+		       __func__, current);
+		return -1;
+	}
+
+	/* set charging current */
+	pmic_reg_read(p, MAX77693_CHG_CNFG_02, &val);
+	val &= ~MAX77693_CHG_CC;
+	val |= current * 10 / 333;	/* 0.1A/3 steps */
+	pmic_reg_write(p, MAX77693_CHG_CNFG_02, val);
+
+	/* enable charging */
+	val = MAX77693_CHG_MODE_ON;
+	pmic_reg_write(p, MAX77693_CHG_CNFG_00, val);
+
+	/* check charging current */
+	pmic_reg_read(p, MAX77693_CHG_CNFG_02, &val);
+	val &= 0x3f;
+	printf("Enable the charger @ %d [mA]\n", val * 333 / 10);
+
+	return 0;
+}
+
+static int max77693_charger_bat_present(struct pmic *p)
+{
+	unsigned int val;
+
+	if (pmic_probe(p))
+		return -1;
+
+	pmic_reg_read(p, MAX77693_CHG_INT_OK, &val);
+
+	return !(val & MAX77693_CHG_DETBAT);
+}
+
+static struct power_chrg power_chrg_pmic_ops = {
+	.chrg_bat_present = max77693_charger_bat_present,
+	.chrg_state = max77693_charger_state,
+};
+
+int pmic_init_max77693(unsigned char bus)
+{
+	static const char name[] = "MAX77693_PMIC";
+	struct pmic *p = pmic_alloc();
+
+	if (!p) {
+		printf("%s: POWER allocation error!\n", __func__);
+		return -ENOMEM;
+	}
+
+	debug("Board PMIC init\n");
+
+	p->name = name;
+	p->interface = PMIC_I2C;
+	p->number_of_regs = PMIC_NUM_OF_REGS;
+	p->hw.i2c.addr = MAX77693_PMIC_I2C_ADDR;
+	p->hw.i2c.tx_num = 1;
+	p->bus = bus;
+
+	p->chrg = &power_chrg_pmic_ops;
+
+	return 0;
+}

include/power/max77693_fg.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics
+ * Piotr Wilczek <p.wilczek@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __MAX77693_FG_H_
+#define __MAX77693_FG_H_
+
+/* MAX 77693 registers */
+enum {
+	MAX77693_STATUS		= 0x00,
+	MAX77693_SOCREP		= 0x06,
+	MAX77693_VCELL		= 0x09,
+	MAX77693_CURRENT	= 0x0A,
+	MAX77693_AVG_CURRENT	= 0x0B,
+	MAX77693_SOCMIX		= 0x0D,
+	MAX77693_SOCAV		= 0x0E,
+	MAX77693_DESIGN_CAP	= 0x18,
+	MAX77693_AVG_VCELL	= 0x19,
+	MAX77693_CONFIG		= 0x1D,
+	MAX77693_VERSION	= 0x21,
+	MAX77693_LEARNCFG	= 0x28,
+	MAX77693_FILTERCFG	= 0x29,
+	MAX77693_RELAXCFG	= 0x2A,
+	MAX77693_MISCCFG	= 0x2B,
+	MAX77693_CGAIN		= 0x2E,
+	MAX77693_COFF		= 0x2F,
+	MAX77693_RCOMP0		= 0x38,
+	MAX77693_TEMPCO		= 0x39,
+	MAX77693_FSTAT		= 0x3D,
+	MAX77693_VFOCV		= 0xEE,
+	MAX77693_VFSOC		= 0xFF,
+
+	FG_NUM_OF_REGS		= 0x100,
+};
+
+#define MAX77693_POR (1 << 1)
+
+#define MODEL_UNLOCK1		0x0059
+#define MODEL_UNLOCK2		0x00c4
+#define MODEL_LOCK1		0x0000
+#define MODEL_LOCK2		0x0000
+
+#define MAX77693_FUEL_I2C_ADDR	(0x6C >> 1)
+
+int power_fg_init(unsigned char bus);
+#endif /* __MAX77693_FG_H_ */

include/power/max77693_muic.h

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics
+ * Piotr Wilczek <p.wilczek@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __MAX77693_MUIC_H_
+#define __MAX77693_MUIC_H_
+
+#include <power/power_chrg.h>
+
+/*
+ * MUIC REGISTER
+ */
+
+#define MAX77693_MUIC_PREFIX	"max77693-muic:"
+
+/* MAX77693_MUIC_STATUS1 */
+#define MAX77693_MUIC_ADC_MASK	0x1F
+
+/* MAX77693_MUIC_STATUS2 */
+#define MAX77693_MUIC_CHG_NO		0x00
+#define MAX77693_MUIC_CHG_USB		0x01
+#define MAX77693_MUIC_CHG_USB_D		0x02
+#define MAX77693_MUIC_CHG_TA		0x03
+#define MAX77693_MUIC_CHG_TA_500	0x04
+#define MAX77693_MUIC_CHG_TA_1A		0x05
+#define MAX77693_MUIC_CHG_MASK		0x07
+
+/* MAX77693_MUIC_CONTROL1 */
+#define MAX77693_MUIC_CTRL1_DN1DP2	((0x1 << 3) | 0x1)
+#define MAX77693_MUIC_CTRL1_UT1UR2	((0x3 << 3) | 0x3)
+#define MAX77693_MUIC_CTRL1_ADN1ADP2	((0x4 << 3) | 0x4)
+#define MAX77693_MUIC_CTRL1_AUT1AUR2	((0x5 << 3) | 0x5)
+#define MAX77693_MUIC_CTRL1_MASK	0xC0
+
+#define MUIC_PATH_USB	0
+#define MUIC_PATH_UART	1
+
+#define MUIC_PATH_CP	0
+#define MUIC_PATH_AP	1
+
+enum muic_path {
+	MUIC_PATH_USB_CP,
+	MUIC_PATH_USB_AP,
+	MUIC_PATH_UART_CP,
+	MUIC_PATH_UART_AP,
+};
+
+/* MAX 777693 MUIC registers */
+enum {
+	MAX77693_MUIC_ID	= 0x00,
+	MAX77693_MUIC_INT1	= 0x01,
+	MAX77693_MUIC_INT2	= 0x02,
+	MAX77693_MUIC_INT3	= 0x03,
+	MAX77693_MUIC_STATUS1	= 0x04,
+	MAX77693_MUIC_STATUS2	= 0x05,
+	MAX77693_MUIC_STATUS3	= 0x06,
+	MAX77693_MUIC_INTMASK1	= 0x07,
+	MAX77693_MUIC_INTMASK2	= 0x08,
+	MAX77693_MUIC_INTMASK3	= 0x09,
+	MAX77693_MUIC_CDETCTRL	= 0x0A,
+	MAX77693_MUIC_CONTROL1	= 0x0C,
+	MAX77693_MUIC_CONTROL2	= 0x0D,
+	MAX77693_MUIC_CONTROL3	= 0x0E,
+
+	MUIC_NUM_OF_REGS	= 0x0F,
+};
+
+#define MAX77693_MUIC_I2C_ADDR	(0x4A >> 1)
+
+int power_muic_init(unsigned int bus);
+#endif /* __MAX77693_MUIC_H_ */

include/power/max77693_pmic.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics
+ * Piotr Wilczek <p.wilczek@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __MAX77693_PMIC_H_
+#define __MAX77693_PMIC_H_
+
+#include <power/power_chrg.h>
+
+enum {CHARGER_ENABLE, CHARGER_DISABLE};
+
+#define CHARGER_MIN_CURRENT 200
+#define CHARGER_MAX_CURRENT 2000
+
+#define MAX77693_CHG_PREFIX	"max77693-chg:"
+
+/* Registers */
+
+#define MAX77693_CHG_BASE	0xB0
+#define MAX77693_CHG_INT_OK	0xB2
+#define MAX77693_CHG_CNFG_00	0xB7
+#define MAX77693_CHG_CNFG_02	0xB9
+#define MAX77693_CHG_CNFG_06	0xBD
+#define MAX77693_SAFEOUT	0xC6
+
+#define PMIC_NUM_OF_REGS	0xC7
+
+#define MAX77693_CHG_DETBAT	(0x1 << 7)	/* MAX77693_CHG_INT_OK */
+#define MAX77693_CHG_MODE_ON	0x05		/* MAX77693_CHG_CNFG_00 */
+#define MAX77693_CHG_CC		0x3F		/* MAX77693_CHG_CNFG_02	*/
+#define MAX77693_CHG_LOCK	(0x0 << 2)	/* MAX77693_CHG_CNFG_06	*/
+#define MAX77693_CHG_UNLOCK	(0x3 << 2)	/* MAX77693_CHG_CNFG_06	*/
+
+#define MAX77693_ENSAFEOUT1	(1 << 6)
+#define MAX77693_ENSAFEOUT2	(1 << 7)
+
+#define MAX77693_PMIC_I2C_ADDR	(0xCC >> 1)
+
+int pmic_init_max77693(unsigned char bus);
+#endif /* __MAX77693_PMIC_H_ */