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pmic:fuel-gauge: Support for MAX17042 fuel-gauge

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Support for MAX17042 fuel-gauge (FG), which is built into the MAX8997
power management device.
Special file - fg_battery_cell_params.h with cells characteristics
added.

The FG device will work with redesigned PMIC framework.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Łukasz Majewski 2012-11-13 03:22:03 +00:00 committed by Anatolij Gustschin
parent 294a97da34
commit b95aacd332
5 changed files with 462 additions and 0 deletions
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1
Makefile
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@ -294,6 +294,7 @@ LIBS-y += drivers/net/phy/libphy.o
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/pmic/libpmic.o \
drivers/power/battery/libbattery.o
LIBS-y += drivers/spi/libspi.o

47
drivers/power/fuel_gauge/Makefile Normal file
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#
# Copyright (C) 2012 Samsung Electronics
# Lukasz Majewski <l.majewski@samsung.com>
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
include $(TOPDIR)/config.mk
LIB := $(obj)libfuel_gauge.o
COBJS-$(CONFIG_POWER_FG_MAX17042) += fg_max17042.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
########################################################################

250
drivers/power/fuel_gauge/fg_max17042.c Normal file
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/*
* Copyright (C) 2012 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <power/pmic.h>
#include <power/max17042_fg.h>
#include <i2c.h>
#include <power/max8997_pmic.h>
#include <power/power_chrg.h>
#include <power/battery.h>
#include <power/fg_battery_cell_params.h>
#include <errno.h>
static int fg_write_regs(struct pmic *p, u8 addr, u16 *data, int num)
{
int ret = 0;
int i;
for (i = 0; i < num; i++, addr++)
ret |= pmic_reg_write(p, addr, *(data + i));
return ret;
}
static int fg_read_regs(struct pmic *p, u8 addr, u16 *data, int num)
{
int ret = 0;
int i;
for (i = 0; i < num; i++, addr++)
ret |= pmic_reg_read(p, addr, (u32 *) (data + i));
return ret;
}
static int fg_write_and_verify(struct pmic *p, u8 addr, u16 data)
{
unsigned int val = data;
int ret = 0;
ret |= pmic_reg_write(p, addr, val);
ret |= pmic_reg_read(p, addr, &val);
if (ret)
return ret;
if (((u16) val) == data)
return 0;
return -1;
}
static void por_fuelgauge_init(struct pmic *p)
{
u16 r_data0[16], r_data1[16], r_data2[16];
u32 rewrite_count = 5, i = 0;
unsigned int val;
int ret = 0;
/* Delay 500 ms */
mdelay(500);
/* Initilize Configuration */
pmic_reg_write(p, MAX17042_CONFIG, 0x2310);
rewrite_model:
/* Unlock Model Access */
pmic_reg_write(p, MAX17042_MLOCKReg1, MODEL_UNLOCK1);
pmic_reg_write(p, MAX17042_MLOCKReg2, MODEL_UNLOCK2);
/* Write/Read/Verify the Custom Model */
ret |= fg_write_regs(p, MAX17042_MODEL1, cell_character0,
ARRAY_SIZE(cell_character0));
ret |= fg_write_regs(p, MAX17042_MODEL2, cell_character1,
ARRAY_SIZE(cell_character1));
ret |= fg_write_regs(p, MAX17042_MODEL3, cell_character2,
ARRAY_SIZE(cell_character2));
if (ret) {
printf("%s: Cell parameters write failed!\n", __func__);
return;
}
ret |= fg_read_regs(p, MAX17042_MODEL1, r_data0, ARRAY_SIZE(r_data0));
ret |= fg_read_regs(p, MAX17042_MODEL2, r_data1, ARRAY_SIZE(r_data1));
ret |= fg_read_regs(p, MAX17042_MODEL3, r_data2, ARRAY_SIZE(r_data2));
if (ret)
printf("%s: Cell parameters read failed!\n", __func__);
for (i = 0; i < 16; i++) {
if ((cell_character0[i] != r_data0[i])
|| (cell_character1[i] != r_data1[i])
|| (cell_character2[i] != r_data2[i]))
goto rewrite_model;
}
/* Lock model access */
pmic_reg_write(p, MAX17042_MLOCKReg1, MODEL_LOCK1);
pmic_reg_write(p, MAX17042_MLOCKReg2, MODEL_LOCK2);
/* Verify the model access is locked */
ret |= fg_read_regs(p, MAX17042_MODEL1, r_data0, ARRAY_SIZE(r_data0));
ret |= fg_read_regs(p, MAX17042_MODEL2, r_data1, ARRAY_SIZE(r_data1));
ret |= fg_read_regs(p, MAX17042_MODEL3, r_data2, ARRAY_SIZE(r_data2));
if (ret) {
printf("%s: Cell parameters read failed!\n", __func__);
return;
}
for (i = 0; i < ARRAY_SIZE(r_data0); i++) {
/* Check if model locked */
if (r_data0[i] || r_data1[i] || r_data2[i]) {
/* Rewrite model data - prevent from endless loop */
if (rewrite_count--) {
puts("FG - Lock model access failed!\n");
goto rewrite_model;
}
}
}
/* Write Custom Parameters */
fg_write_and_verify(p, MAX17042_RCOMP0, RCOMP0);
fg_write_and_verify(p, MAX17042_TEMPCO, TempCo);
/* Delay at least 350mS */
mdelay(350);
/* Initialization Complete */
pmic_reg_read(p, MAX17042_STATUS, &val);
/* Write and Verify Status with POR bit Cleared */
fg_write_and_verify(p, MAX17042_STATUS, val & ~MAX17042_POR);
/* Delay at least 350 ms */
mdelay(350);
}
static int power_update_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 max17042 fuel gauge\n");
return -1;
}
ret |= pmic_reg_read(p, MAX17042_VFSOC, &val);
pb->bat->state_of_chrg = (val >> 8);
pmic_reg_read(p, MAX17042_VCELL, &val);
debug("vfsoc: 0x%x\n", val);
pb->bat->voltage_uV = ((val & 0xFFUL) >> 3) + ((val & 0xFF00) >> 3);
pb->bat->voltage_uV = (pb->bat->voltage_uV * 625);
pmic_reg_read(p, 0x05, &val);
pb->bat->capacity = val >> 2;
return ret;
}
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 max17042 fuel gauge\n");
return -1;
}
ret |= pmic_reg_read(p, MAX17042_STATUS, &val);
debug("fg status: 0x%x\n", val);
if (val == MAX17042_POR)
por_fuelgauge_init(p);
ret |= pmic_reg_read(p, MAX17042_VERSION, &val);
pb->bat->version = val;
power_update_battery(p, bat);
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 ret;
}
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[] = "MAX17042_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 = MAX17042_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;
}

90
include/power/fg_battery_cell_params.h Normal file
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@ -0,0 +1,90 @@
/*
* Copyright (C) 2012 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __FG_BATTERY_CELL_PARAMS_H_
#define __FG_BATTERY_CELL_PARAMS_H_
#if defined(CONFIG_POWER_FG_MAX17042) && defined(CONFIG_TRATS)
/* Cell characteristics - Exynos4 TRATS development board */
/* Shall be written to addr 0x80h */
u16 cell_character0[16] = {
0xA2A0,
0xB6E0,
0xB850,
0xBAD0,
0xBB20,
0xBB70,
0xBBC0,
0xBC20,
0xBC80,
0xBCE0,
0xBD80,
0xBE20,
0xC090,
0xC420,
0xC910,
0xD070
};
/* Shall be written to addr 0x90h */
u16 cell_character1[16] = {
0x0090,
0x1A50,
0x02F0,
0x2060,
0x2060,
0x2E60,
0x26A0,
0x2DB0,
0x2DB0,
0x1870,
0x2A20,
0x16F0,
0x08F0,
0x0D40,
0x08C0,
0x08C0
};
/* Shall be written to addr 0xA0h */
u16 cell_character2[16] = {
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100,
0x0100
};
#endif
#endif /* __FG_BATTERY_CELL_PARAMS_H_ */

74
include/power/max17042_fg.h Normal file
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@ -0,0 +1,74 @@
/*
* Copyright (C) 2012 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __MAX17042_FG_H_
#define __MAX17042_FG_H_
/* MAX 17042 registers */
enum {
MAX17042_STATUS = 0x00,
MAX17042_SOCREP = 0x06,
MAX17042_VCELL = 0x09,
MAX17042_CURRENT = 0x0A,
MAX17042_AVG_CURRENT = 0x0B,
MAX17042_SOCMIX = 0x0D,
MAX17042_SOCAV = 0x0E,
MAX17042_DESIGN_CAP = 0x18,
MAX17042_AVG_VCELL = 0x19,
MAX17042_CONFIG = 0x1D,
MAX17042_VERSION = 0x21,
MAX17042_LEARNCFG = 0x28,
MAX17042_FILTERCFG = 0x29,
MAX17042_RELAXCFG = 0x2A,
MAX17042_MISCCFG = 0x2B,
MAX17042_CGAIN = 0x2E,
MAX17042_COFF = 0x2F,
MAX17042_RCOMP0 = 0x38,
MAX17042_TEMPCO = 0x39,
MAX17042_FSTAT = 0x3D,
MAX17042_MLOCKReg1 = 0x62,
MAX17042_MLOCKReg2 = 0x63,
MAX17042_MODEL1 = 0x80,
MAX17042_MODEL2 = 0x90,
MAX17042_MODEL3 = 0xA0,
MAX17042_VFOCV = 0xFB,
MAX17042_VFSOC = 0xFF,
FG_NUM_OF_REGS = 0x100,
};
#define RCOMP0 0x0060
#define TempCo 0x1015
#define MAX17042_POR (1 << 1)
#define MODEL_UNLOCK1 0x0059
#define MODEL_UNLOCK2 0x00c4
#define MODEL_LOCK1 0x0000
#define MODEL_LOCK2 0x0000
#define MAX17042_I2C_ADDR (0x6C >> 1)
int power_fg_init(unsigned char bus);
#endif /* __MAX17042_FG_H_ */