97 lines
3.4 KiB
C
97 lines
3.4 KiB
C
/*
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* bq2415x charger driver
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*
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* Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef BQ2415X_CHARGER_H
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#define BQ2415X_CHARGER_H
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/*
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* This is platform data for bq2415x chip. It contains default board
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* voltages and currents which can be also later configured via sysfs. If
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* value is -1 then default chip value (specified in datasheet) will be
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* used.
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*
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* Value resistor_sense is needed for for configuring charge and
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* termination current. It it is less or equal to zero, configuring charge
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* and termination current will not be possible.
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*
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* Function set_mode_hook is needed for automode (setting correct current
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* limit when charger is connected/disconnected or setting boost mode).
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* When is NULL, automode function is disabled. When is not NULL, it must
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* have this prototype:
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*
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* int (*set_mode_hook)(
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* void (*hook)(enum bq2415x_mode mode, void *data),
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* void *data)
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*
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* hook is hook function (see below) and data is pointer to driver private
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* data
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*
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* bq2415x driver will call it as:
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*
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* platform_data->set_mode_hook(bq2415x_hook_function, bq2415x_device);
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*
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* Board/platform function set_mode_hook return non zero value when hook
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* function was successful registered. Platform code should call that hook
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* function (which get from pointer, with data) every time when charger
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* was connected/disconnected or require to enable boost mode. bq2415x
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* driver then will set correct current limit, enable/disable charger or
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* boost mode.
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*
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* Hook function has this prototype:
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*
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* void hook(enum bq2415x_mode mode, void *data);
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*
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* mode is bq2415x mode (charger or boost)
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* data is pointer to driver private data (which get from
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* set_charger_type_hook)
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*
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* When bq driver is being unloaded, it call function:
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*
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* platform_data->set_mode_hook(NULL, NULL);
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*
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* (hook function and driver private data are NULL)
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*
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* After that board/platform code must not call driver hook function! It
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* is possible that pointer to hook function will not be valid and calling
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* will cause undefined result.
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*/
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/* Supported modes with maximal current limit */
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enum bq2415x_mode {
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BQ2415X_MODE_OFF, /* offline mode (charger disabled) */
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BQ2415X_MODE_NONE, /* unknown charger (100mA) */
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BQ2415X_MODE_HOST_CHARGER, /* usb host/hub charger (500mA) */
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BQ2415X_MODE_DEDICATED_CHARGER, /* dedicated charger (unlimited) */
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BQ2415X_MODE_BOOST, /* boost mode (charging disabled) */
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};
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struct bq2415x_platform_data {
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int current_limit; /* mA */
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int weak_battery_voltage; /* mV */
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int battery_regulation_voltage; /* mV */
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int charge_current; /* mA */
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int termination_current; /* mA */
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int resistor_sense; /* m ohm */
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int (*set_mode_hook)(void (*hook)(enum bq2415x_mode mode, void *data),
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void *data);
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};
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#endif
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