From 04750447124143dfc9444a0c3335ffc9636e1df8 Mon Sep 17 00:00:00 2001 From: Piotr Wilczek Date: Tue, 24 Sep 2013 16:31:22 +0200 Subject: 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 Signed-off-by: Kyungmin Park Signed-off-by: Minkyu Kang --- drivers/power/mfd/Makefile | 33 +++++++++ drivers/power/mfd/fg_max77693.c | 139 ++++++++++++++++++++++++++++++++++++++ drivers/power/mfd/muic_max77693.c | 77 +++++++++++++++++++++ drivers/power/mfd/pmic_max77693.c | 96 ++++++++++++++++++++++++++ 4 files changed, 345 insertions(+) create mode 100644 drivers/power/mfd/Makefile create mode 100644 drivers/power/mfd/fg_max77693.c create mode 100644 drivers/power/mfd/muic_max77693.c create mode 100644 drivers/power/mfd/pmic_max77693.c (limited to 'drivers') diff --git a/drivers/power/mfd/Makefile b/drivers/power/mfd/Makefile new file mode 100644 index 0000000000..76a05daa67 --- /dev/null +++ b/drivers/power/mfd/Makefile @@ -0,0 +1,33 @@ +# +# Copyright (C) 2013 Samsung Electronics +# Piotr Wilczek +# +# 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 + +######################################################################## diff --git a/drivers/power/mfd/fg_max77693.c b/drivers/power/mfd/fg_max77693.c new file mode 100644 index 0000000000..4519fed497 --- /dev/null +++ b/drivers/power/mfd/fg_max77693.c @@ -0,0 +1,139 @@ +/* + * Copyright (C) 2013 Samsung Electronics + * Piotr Wilczek + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +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; +} diff --git a/drivers/power/mfd/muic_max77693.c b/drivers/power/mfd/muic_max77693.c new file mode 100644 index 0000000000..e71012de1f --- /dev/null +++ b/drivers/power/mfd/muic_max77693.c @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2013 Samsung Electronics + * Piotr Wilczek + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include + +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; +} diff --git a/drivers/power/mfd/pmic_max77693.c b/drivers/power/mfd/pmic_max77693.c new file mode 100644 index 0000000000..1a4416b54f --- /dev/null +++ b/drivers/power/mfd/pmic_max77693.c @@ -0,0 +1,96 @@ +/* + * Copyright (C) 2013 Samsung Electronics + * Piotr Wilczek + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include + +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; +} -- cgit v1.2.1