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Diffstat (limited to 'include/linux/power/bq2415x_charger.h')
| -rw-r--r-- | include/linux/power/bq2415x_charger.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/include/linux/power/bq2415x_charger.h b/include/linux/power/bq2415x_charger.h new file mode 100644 index 000000000000..8dcc0f46fc0a --- /dev/null +++ b/include/linux/power/bq2415x_charger.h @@ -0,0 +1,96 @@ +/* + * bq2415x charger driver + * + * Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com> + * + * 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., + * 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); +}; + +#endif |