u-boot/drivers/power/fuel_gauge/fg_max17042.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

285 lines
6.1 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*/
#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));
if (ret)
return ret;
}
return 0;
}
static int fg_read_regs(struct pmic *p, u8 addr, u16 *data, int num)
{
unsigned int dat;
int ret = 0;
int i;
for (i = 0; i < num; i++, addr++) {
ret = pmic_reg_read(p, addr, &dat);
if (ret)
return ret;
*(data + i) = (u16)dat;
}
return 0;
}
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;
u32 check_count;
u32 lock_count;
u32 i = 0;
u32 val;
s32 ret = 0;
char *status_msg;
/* Delay 500 ms */
mdelay(500);
/* Initilize Configuration */
pmic_reg_write(p, MAX17042_CONFIG, 0x2310);
rewrite_model:
check_count = 5;
lock_count = 5;
if (!rewrite_count--) {
status_msg = "init failed!";
goto error;
}
/* 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));
if (ret)
goto rewrite_model;
ret = fg_write_regs(p, MAX17042_MODEL2, cell_character1,
ARRAY_SIZE(cell_character1));
if (ret)
goto rewrite_model;
ret = fg_write_regs(p, MAX17042_MODEL3, cell_character2,
ARRAY_SIZE(cell_character2));
if (ret)
goto rewrite_model;
check_model:
if (!check_count--) {
if (rewrite_count)
goto rewrite_model;
else
status_msg = "check failed!";
goto error;
}
ret = fg_read_regs(p, MAX17042_MODEL1, r_data0, ARRAY_SIZE(r_data0));
if (ret)
goto check_model;
ret = fg_read_regs(p, MAX17042_MODEL2, r_data1, ARRAY_SIZE(r_data1));
if (ret)
goto check_model;
ret = fg_read_regs(p, MAX17042_MODEL3, r_data2, ARRAY_SIZE(r_data2));
if (ret)
goto check_model;
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:
if (!lock_count--) {
if (rewrite_count)
goto rewrite_model;
else
status_msg = "lock failed!";
goto error;
}
/* 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));
if (ret)
goto lock_model;
ret = fg_read_regs(p, MAX17042_MODEL2, r_data1, ARRAY_SIZE(r_data1));
if (ret)
goto lock_model;
ret = fg_read_regs(p, MAX17042_MODEL3, r_data2, ARRAY_SIZE(r_data2));
if (ret)
goto lock_model;
for (i = 0; i < ARRAY_SIZE(r_data0); i++) {
/* Check if model locked */
if (r_data0[i] || r_data1[i] || r_data2[i])
goto lock_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);
status_msg = "OK!";
error:
debug("%s: model init status: %s\n", p->name, status_msg);
return;
}
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 -ENODEV;
}
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 -ENODEV;
}
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;
}