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* bq2415x charger driver
* Copyright (C) 2011-2012 Pali Rohár <>
* 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
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#ifndef BQ2415X_CHARGER_H
#define BQ2415X_CHARGER_H
* This is platform data for bq2415x chip. It contains default board
* voltages and currents which can be also later configured via sysfs. If
* value is -1 then default chip value (specified in datasheet) will be
* used.
* Value resistor_sense is needed for for configuring charge and
* termination current. It it is less or equal to zero, configuring charge
* and termination current will not be possible.
* Function set_mode_hook is needed for automode (setting correct current
* limit when charger is connected/disconnected or setting boost mode).
* When is NULL, automode function is disabled. When is not NULL, it must
* have this prototype:
* int (*set_mode_hook)(
* void (*hook)(enum bq2415x_mode mode, void *data),
* void *data)
* hook is hook function (see below) and data is pointer to driver private
* data
* bq2415x driver will call it as:
* platform_data->set_mode_hook(bq2415x_hook_function, bq2415x_device);
* Board/platform function set_mode_hook return non zero value when hook
* function was successful registered. Platform code should call that hook
* function (which get from pointer, with data) every time when charger
* was connected/disconnected or require to enable boost mode. bq2415x
* driver then will set correct current limit, enable/disable charger or
* boost mode.
* Hook function has this prototype:
* void hook(enum bq2415x_mode mode, void *data);
* mode is bq2415x mode (charger or boost)
* data is pointer to driver private data (which get from
* set_charger_type_hook)
* When bq driver is being unloaded, it call function:
* platform_data->set_mode_hook(NULL, NULL);
* (hook function and driver private data are NULL)
* After that board/platform code must not call driver hook function! It
* is possible that pointer to hook function will not be valid and calling
* will cause undefined result.
/* Supported modes with maximal current limit */
enum bq2415x_mode {
BQ2415X_MODE_OFF, /* offline mode (charger disabled) */
BQ2415X_MODE_NONE, /* unknown charger (100mA) */
BQ2415X_MODE_HOST_CHARGER, /* usb host/hub charger (500mA) */
BQ2415X_MODE_DEDICATED_CHARGER, /* dedicated charger (unlimited) */
BQ2415X_MODE_BOOST, /* boost mode (charging disabled) */
struct bq2415x_platform_data {
int current_limit; /* mA */
int weak_battery_voltage; /* mV */
int battery_regulation_voltage; /* mV */
int charge_current; /* mA */
int termination_current; /* mA */
int resistor_sense; /* m ohm */
int (*set_mode_hook)(void (*hook)(enum bq2415x_mode mode, void *data),
void *data);