785 lines
21 KiB
C
785 lines
21 KiB
C
/****************************************************************************
|
|
* drivers/power/bq2425x.c
|
|
* Lower half driver for BQ2425x battery charger
|
|
*
|
|
* Copyright (C) 2015 Alan Carvalho de Assis. All rights reserved.
|
|
* Author: Alan Carvalho de Assis <acassis@gmail.com>
|
|
*
|
|
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* The BQ24250/BQ24251 are Li-Ion Battery Charger with Power-Path Management.
|
|
* It can be configured to Input Current Limit up to 2A.
|
|
*/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <unistd.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/kmalloc.h>
|
|
#include <nuttx/i2c/i2c_master.h>
|
|
#include <nuttx/power/battery_charger.h>
|
|
#include <nuttx/power/battery_ioctl.h>
|
|
#include "bq2425x.h"
|
|
|
|
/* This driver requires:
|
|
*
|
|
* CONFIG_BATTERY_CHARGER - Upper half battery driver support
|
|
* CONFIG_I2C - I2C support
|
|
* CONFIG_I2C_BQ2425X - And the driver must be explictly selected.
|
|
*/
|
|
|
|
#if defined(CONFIG_BATTERY_CHARGER) && defined(CONFIG_I2C) && \
|
|
defined(CONFIG_I2C_BQ2425X)
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* Debug ********************************************************************/
|
|
|
|
#ifdef CONFIG_DEBUG_BQ2425X
|
|
# define baterr _err
|
|
# define batreg _err
|
|
#else
|
|
# ifdef CONFIG_CPP_HAVE_VARARGS
|
|
# define baterr(x...)
|
|
# define batreg(x...)
|
|
# else
|
|
# define baterr (void)
|
|
# define batreg (void)
|
|
# endif
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Private
|
|
****************************************************************************/
|
|
|
|
struct bq2425x_dev_s
|
|
{
|
|
/* The common part of the battery driver visible to the upper-half driver */
|
|
|
|
FAR const struct battery_charger_operations_s *ops; /* Battery operations */
|
|
sem_t batsem; /* Enforce mutually exclusive access */
|
|
|
|
/* Data fields specific to the lower half BQ2425x driver follow */
|
|
|
|
FAR struct i2c_master_s *i2c; /* I2C interface */
|
|
uint8_t addr; /* I2C address */
|
|
uint32_t frequency; /* I2C frequency */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
/* I2C support */
|
|
|
|
static int bq2425x_getreg8(FAR struct bq2425x_dev_s *priv, uint8_t regaddr,
|
|
FAR uint8_t *regval);
|
|
static int bq2425x_putreg8(FAR struct bq2425x_dev_s *priv, uint8_t regaddr,
|
|
uint8_t regval);
|
|
|
|
static inline int bq2425x_getreport(FAR struct bq2425x_dev_s *priv,
|
|
uint8_t *report);
|
|
static inline int bq2425x_reset(FAR struct bq2425x_dev_s *priv);
|
|
static inline int bq2425x_watchdog(FAR struct bq2425x_dev_s *priv, bool enable);
|
|
static inline int bq2425x_setvolt(FAR struct bq2425x_dev_s *priv, int volts);
|
|
static inline int bq2425x_setcurr(FAR struct bq2425x_dev_s *priv, int current);
|
|
|
|
/* Battery driver lower half methods */
|
|
|
|
static int bq2425x_state(struct battery_charger_dev_s *dev, int *status);
|
|
static int bq2425x_health(struct battery_charger_dev_s *dev, int *health);
|
|
static int bq2425x_online(struct battery_charger_dev_s *dev, bool *status);
|
|
static int bq2425x_voltage(struct battery_charger_dev_s *dev, int value);
|
|
static int bq2425x_current(struct battery_charger_dev_s *dev, int value);
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
static const struct battery_charger_operations_s g_bq2425xops =
|
|
{
|
|
bq2425x_state,
|
|
bq2425x_health,
|
|
bq2425x_online,
|
|
bq2425x_voltage,
|
|
bq2425x_current
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_getreg8
|
|
*
|
|
* Description:
|
|
* Read a 8-bit value from a BQ2425x register pair.
|
|
*
|
|
* START <I2C write address> ACK <Reg address> ACK
|
|
* REPEATED-START <I2C read address> ACK Data0 ACK Data1 NO-ACK STOP
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int bq2425x_getreg8(FAR struct bq2425x_dev_s *priv, uint8_t regaddr,
|
|
FAR uint8_t *regval)
|
|
{
|
|
struct i2c_config_s config;
|
|
uint8_t val;
|
|
int ret;
|
|
|
|
/* Set up the I2C configuration */
|
|
|
|
config.frequency = priv->frequency;
|
|
config.address = priv->addr;
|
|
config.addrlen = 7;
|
|
|
|
/* Write the register address */
|
|
|
|
ret = i2c_write(priv->i2c, &config, ®addr, 1);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: i2c_write failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Restart and read 8-bits from the register */
|
|
|
|
ret = i2c_read(priv->i2c, &config, &val, 1);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: i2c_read failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Copy 8-bit value to be returned */
|
|
|
|
*regval = val;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_putreg8
|
|
*
|
|
* Description:
|
|
* Write a 8-bit value to a BQ2425x register pair.
|
|
*
|
|
* START <I2C write address> ACK <Reg address> ACK Data0 ACK Data1 ACK STOP
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int bq2425x_putreg8(FAR struct bq2425x_dev_s *priv, uint8_t regaddr,
|
|
uint8_t regval)
|
|
{
|
|
struct i2c_config_s config;
|
|
uint8_t buffer[2];
|
|
|
|
/* Set up the I2C configuration */
|
|
|
|
config.frequency = priv->frequency;
|
|
config.address = priv->addr;
|
|
config.addrlen = 7;
|
|
|
|
batreg("addr: %02x regval: %08x\n", regaddr, regval);
|
|
|
|
/* Set up a 3 byte message to send */
|
|
|
|
buffer[0] = regaddr;
|
|
buffer[1] = regval;
|
|
|
|
/* Write the register address followed by the data (no RESTART) */
|
|
|
|
return i2c_write(priv->i2c, &config, buffer, 2);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_getreport
|
|
*
|
|
* Description:
|
|
* Read the BQ2425X Register #1 (status and fault)
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline int bq2425x_getreport(FAR struct bq2425x_dev_s *priv,
|
|
uint8_t *report)
|
|
{
|
|
uint8_t regval = 0;
|
|
int ret;
|
|
|
|
ret = bq2425x_getreg8(priv, BQ2425X_REG_1, ®val);
|
|
if (ret == OK)
|
|
{
|
|
*report = regval;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_reset
|
|
*
|
|
* Description:
|
|
* Reset the BQ2425x
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline int bq2425x_reset(FAR struct bq2425x_dev_s *priv)
|
|
{
|
|
int ret;
|
|
uint8_t regval;
|
|
|
|
/* Read current register value */
|
|
|
|
ret = bq2425x_getreg8(priv, BQ2425X_REG_2, ®val);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error reading from BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Send reset command */
|
|
|
|
regval |= BQ2425X_RESET;
|
|
ret = bq2425x_putreg8(priv, BQ2425X_REG_2, regval);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error writing to BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Wait a little bit to clear registers */
|
|
|
|
usleep(500);
|
|
|
|
/* There is a BUG in BQ2425X the RESET bit is always read as 1 */
|
|
|
|
regval &= ~(BQ2425X_RESET);
|
|
ret = bq2425x_putreg8(priv, BQ2425X_REG_2, regval);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error writing to BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_watchdog
|
|
*
|
|
* Description:
|
|
* Enable/Disable the BQ2425x watchdog
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline int bq2425x_watchdog(FAR struct bq2425x_dev_s *priv, bool enable)
|
|
{
|
|
int ret;
|
|
uint8_t regval;
|
|
|
|
ret = bq2425x_getreg8(priv, BQ2425X_REG_1, ®val);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error reading from BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (enable)
|
|
{
|
|
regval |= BQ2425X_WD_EN;
|
|
}
|
|
else
|
|
{
|
|
regval &= ~(BQ2425X_WD_EN);
|
|
}
|
|
|
|
ret = bq2425x_putreg8(priv, BQ2425X_REG_1, regval);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error writing to BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_state
|
|
*
|
|
* Description:
|
|
* Return the current battery state
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int bq2425x_state(struct battery_charger_dev_s *dev, int *status)
|
|
{
|
|
FAR struct bq2425x_dev_s *priv = (FAR struct bq2425x_dev_s *)dev;
|
|
uint8_t regval = 0;
|
|
int ret;
|
|
|
|
ret = bq2425x_getreport(priv, ®val);
|
|
if (ret < 0)
|
|
{
|
|
*status = BATTERY_UNKNOWN;
|
|
return ret;
|
|
}
|
|
|
|
regval &= BQ2425X_STAT_MASK;
|
|
|
|
/* Is there some fault in the battery? */
|
|
|
|
if (regval == BQ2425X_STAT_FAULT)
|
|
{
|
|
*status = BATTERY_FAULT;
|
|
}
|
|
|
|
/* Is the charging done? */
|
|
|
|
else if (regval == BQ2425X_STAT_CHG_DONE)
|
|
{
|
|
*status = BATTERY_FULL;
|
|
}
|
|
|
|
/* Is the charging in progress? */
|
|
|
|
else if (regval == BQ2425X_STAT_CHG_PROGRESS)
|
|
{
|
|
*status = BATTERY_CHARGING;
|
|
}
|
|
|
|
/* Is the charging ready? */
|
|
|
|
else if (regval == BQ2425X_STAT_READY)
|
|
{
|
|
*status = BATTERY_IDLE;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_health
|
|
*
|
|
* Description:
|
|
* Return the current battery health state
|
|
*
|
|
* Note: if more than one fault happened the user needs to call this ioctl
|
|
* again to read a new fault, repeat until receive a BATTERY_HEALTH_GOOD.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int bq2425x_health(struct battery_charger_dev_s *dev, int *health)
|
|
{
|
|
FAR struct bq2425x_dev_s *priv = (FAR struct bq2425x_dev_s *)dev;
|
|
uint8_t regval = 0;
|
|
int ret;
|
|
|
|
ret = bq2425x_getreport(priv, ®val);
|
|
if (ret < 0)
|
|
{
|
|
*health = BATTERY_HEALTH_UNKNOWN;
|
|
return ret;
|
|
}
|
|
|
|
regval &= BQ2425X_FAULT_MASK;
|
|
|
|
switch (regval)
|
|
{
|
|
case BQ2425X_FAULT_NORMAL:
|
|
*health = BATTERY_HEALTH_GOOD;
|
|
break;
|
|
|
|
case BQ2425X_FAULT_SLEEP:
|
|
case BQ2425X_FAULT_INP_OVP:
|
|
case BQ2425X_FAULT_INP_UVLO:
|
|
case BQ2425X_FAULT_ISET_SHORT:
|
|
case BQ2425X_FAULT_INP_LDO_LOW:
|
|
*health = BATTERY_HEALTH_UNSPEC_FAIL;
|
|
break;
|
|
|
|
case BQ2425X_FAULT_BAT_OVP:
|
|
*health = BATTERY_HEALTH_OVERVOLTAGE;
|
|
break;
|
|
|
|
case BQ2425X_FAULT_BAT_TEMP:
|
|
case BQ2425X_FAULT_THERM_SHUT:
|
|
*health = BATTERY_HEALTH_OVERHEAT;
|
|
break;
|
|
|
|
case BQ2425X_FAULT_TIMER:
|
|
*health = BATTERY_HEALTH_SAFE_TMR_EXP;
|
|
break;
|
|
|
|
case BQ2425X_FAULT_NO_BATTERY:
|
|
*health = BATTERY_HEALTH_DISCONNECTED;
|
|
break;
|
|
|
|
default:
|
|
*health = BATTERY_HEALTH_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_online
|
|
*
|
|
* Description:
|
|
* Return true if the battery is online
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int bq2425x_online(struct battery_charger_dev_s *dev, bool *status)
|
|
{
|
|
/* There is no concept of online/offline in this driver */
|
|
|
|
*status = true;
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_powersupply
|
|
*
|
|
* Description:
|
|
* Set the Power Supply Current Limit.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline int bq2425x_powersupply(FAR struct bq2425x_dev_s *priv, int current)
|
|
{
|
|
uint8_t regval;
|
|
int ret, idx;
|
|
|
|
switch (current)
|
|
{
|
|
case 100:
|
|
idx = BQ2425X_INP_CURR_LIM_100MA;
|
|
break;
|
|
|
|
case 150:
|
|
idx = BQ2425X_INP_CURR_LIM_150MA;
|
|
break;
|
|
|
|
case 500:
|
|
idx = BQ2425X_INP_CURR_LIM_500MA;
|
|
break;
|
|
|
|
case 900:
|
|
idx = BQ2425X_INP_CURR_LIM_900MA;
|
|
break;
|
|
|
|
case 1500:
|
|
idx = BQ2425X_INP_CURR_LIM_1500MA;
|
|
break;
|
|
|
|
case 2000:
|
|
idx = BQ2425X_INP_CURR_LIM_2000MA;
|
|
break;
|
|
|
|
default:
|
|
baterr("ERROR: Current not supported, setting default to 100mA.!\n");
|
|
idx = BQ2425X_INP_CURR_LIM_100MA;
|
|
break;
|
|
}
|
|
|
|
/* Read current register */
|
|
|
|
ret = bq2425x_getreg8(priv, BQ2425X_REG_2, ®val);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error reading from BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Clear previous current and set new value */
|
|
|
|
regval &= ~(BQ2425X_INP_CURR_LIM_MASK);
|
|
regval |= idx;
|
|
|
|
/* Also clear Reset bit to avoid the resetting BUG */
|
|
|
|
regval &= ~(BQ2425X_RESET);
|
|
|
|
ret = bq2425x_putreg8(priv, BQ2425X_REG_2, regval);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error writing to BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_setvolt
|
|
*
|
|
* Description:
|
|
* Set the voltage level to charge the battery. Voltage value in mV.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline int bq2425x_setvolt(FAR struct bq2425x_dev_s *priv, int volts)
|
|
{
|
|
uint8_t regval;
|
|
int ret, idx;
|
|
|
|
/* Verify if voltage is in the acceptable range */
|
|
|
|
if (volts < BQ2425X_VOLT_MIN || volts > BQ2425X_VOLT_MAX)
|
|
{
|
|
baterr("ERROR: Voltage %d mV is out of range.\n", volts);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = bq2425x_getreg8(priv, BQ2425X_REG_3, ®val);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error reading from BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Voltage starts at 3500mV and increases in steps of 20mV */
|
|
|
|
idx = volts - BQ2425X_VOLT_MIN;
|
|
idx = idx / 20;
|
|
|
|
/* Clear previous voltage */
|
|
|
|
regval &= ~(BQ2425X_BAT_VOLT_MASK);
|
|
regval |= (idx << BQ2425X_BAT_VOLT_SHIFT);
|
|
|
|
ret = bq2425x_putreg8(priv, BQ2425X_REG_3, regval);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error writing to BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_setcurr
|
|
*
|
|
* Description:
|
|
* Set the current to charge the battery. Current value in mA.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline int bq2425x_setcurr(FAR struct bq2425x_dev_s *priv, int current)
|
|
{
|
|
uint8_t regval;
|
|
int ret, idx;
|
|
|
|
/* Verify if voltage is in the acceptable range */
|
|
|
|
if (current < BQ2425X_CURR_MIN || current > BQ2425X_CURR_MAX)
|
|
{
|
|
baterr("ERROR: Current %d mA is out of range.\n", volts);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = bq2425x_getreg8(priv, BQ2425X_REG_4, ®val);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error reading from BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Current starts at 500mV and increases in steps of 50mA */
|
|
|
|
idx = current - BQ2425X_CURR_MIN;
|
|
idx = idx / 50;
|
|
|
|
/* Clear previous current and set new value */
|
|
|
|
regval &= ~(BQ2425X_CHG_CURRENT_MASK);
|
|
regval |= (idx << BQ2425X_CHG_CURRENT_SHIFT);
|
|
|
|
ret = bq2425x_putreg8(priv, BQ2425X_REG_4, regval);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error writing to BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_voltage
|
|
*
|
|
* Description:
|
|
* Set battery charger voltage
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int bq2425x_voltage(struct battery_charger_dev_s *dev, int value)
|
|
{
|
|
FAR struct bq2425x_dev_s *priv = (FAR struct bq2425x_dev_s *)dev;
|
|
int ret;
|
|
|
|
/* Set voltage to battery charger */
|
|
|
|
ret = bq2425x_setvolt(priv, value);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error setting voltage to BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_current
|
|
*
|
|
* Description:
|
|
* Set the battery charger current rate for charging
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int bq2425x_current(struct battery_charger_dev_s *dev, int value)
|
|
{
|
|
FAR struct bq2425x_dev_s *priv = (FAR struct bq2425x_dev_s *)dev;
|
|
int ret;
|
|
|
|
/* Set current to battery charger */
|
|
|
|
ret = bq2425x_setcurr(priv, value);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Error setting current to BQ2425X! Error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: bq2425x_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the BQ2425x battery driver and return an instance of the
|
|
* lower_half interface that may be used with battery_charger_register();
|
|
*
|
|
* This driver requires:
|
|
*
|
|
* CONFIG_BATTERY_CHARGER - Upper half battery driver support
|
|
* CONFIG_I2C - I2C support
|
|
* CONFIG_I2C_BQ2425X - And the driver must be explictly selected.
|
|
*
|
|
* Input Parameters:
|
|
* i2c - An instance of the I2C interface to use to communicate with
|
|
* the BQ2425x
|
|
* addr - The I2C address of the BQ2425x (Better be 0x36).
|
|
* frequency - The I2C frequency
|
|
*
|
|
* Returned Value:
|
|
* A pointer to the initializeed lower-half driver instance. A NULL pointer
|
|
* is returned on a failure to initialize the BQ2425x lower half.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct battery_charger_dev_s *
|
|
bq2425x_initialize(FAR struct i2c_master_s *i2c, uint8_t addr,
|
|
uint32_t frequency)
|
|
{
|
|
FAR struct bq2425x_dev_s *priv;
|
|
int ret;
|
|
|
|
/* Initialize the BQ2425x device structure */
|
|
|
|
priv = (FAR struct bq2425x_dev_s *)kmm_zalloc(sizeof(struct bq2425x_dev_s));
|
|
if (priv)
|
|
{
|
|
/* Initialize the BQ2425x device structure */
|
|
|
|
sem_init(&priv->batsem, 0, 1);
|
|
priv->ops = &g_bq2425xops;
|
|
priv->i2c = i2c;
|
|
priv->addr = addr;
|
|
priv->frequency = frequency;
|
|
|
|
/* Reset the BQ2425x */
|
|
|
|
ret = bq2425x_reset(priv);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Failed to reset the BQ2425x: %d\n", ret);
|
|
kmm_free(priv);
|
|
return NULL;
|
|
}
|
|
|
|
/* Disable watchdog otherwise BQ2425x returns to StandAlone mode */
|
|
|
|
ret = bq2425x_watchdog(priv, false);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Failed to disable BQ2425x watchdog: %d\n", ret);
|
|
kmm_free(priv);
|
|
return NULL;
|
|
}
|
|
|
|
/* Define that our power supply can offer 2000mA to the charger */
|
|
|
|
ret = bq2425x_powersupply(priv, 2000);
|
|
if (ret < 0)
|
|
{
|
|
baterr("ERROR: Failed to set BQ2425x power supply current: %d\n", ret);
|
|
kmm_free(priv);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return (FAR struct battery_charger_dev_s *)priv;
|
|
}
|
|
|
|
#endif /* CONFIG_BATTERY && CONFIG_I2C && CONFIG_I2C_BQ2425X */
|