include/linux/power/smb347-charger.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Summit Microelectronics SMB347 Battery Charger Driver
   4  *
   5  * Copyright (C) 2011, Intel Corporation
   6  *
   7  * Authors: Bruce E. Robertson <bruce.e.robertson@intel.com>
   8  *          Mika Westerberg <mika.westerberg@linux.intel.com>
   9  */
  10
  11 #ifndef SMB347_CHARGER_H
  12 #define SMB347_CHARGER_H
  13
  14 #include <linux/types.h>
  15 #include <linux/power_supply.h>
  16
  17 enum {
  18         /* use the default compensation method */
  19         SMB347_SOFT_TEMP_COMPENSATE_DEFAULT = -1,
  20
  21         SMB347_SOFT_TEMP_COMPENSATE_NONE,
  22         SMB347_SOFT_TEMP_COMPENSATE_CURRENT,
  23         SMB347_SOFT_TEMP_COMPENSATE_VOLTAGE,
  24 };
  25
  26 /* Use default factory programmed value for hard/soft temperature limit */
  27 #define SMB347_TEMP_USE_DEFAULT         -273
  28
  29 /*
  30  * Charging enable can be controlled by software (via i2c) by
  31  * smb347-charger driver or by EN pin (active low/high).
  32  */
  33 enum smb347_chg_enable {
  34         SMB347_CHG_ENABLE_SW,
  35         SMB347_CHG_ENABLE_PIN_ACTIVE_LOW,
  36         SMB347_CHG_ENABLE_PIN_ACTIVE_HIGH,
  37 };
  38
  39 /**
  40  * struct smb347_charger_platform_data - platform data for SMB347 charger
  41  * @battery_info: Information about the battery
  42  * @max_charge_current: maximum current (in uA) the battery can be charged
  43  * @max_charge_voltage: maximum voltage (in uV) the battery can be charged
  44  * @pre_charge_current: current (in uA) to use in pre-charging phase
  45  * @termination_current: current (in uA) used to determine when the
  46  *                       charging cycle terminates
  47  * @pre_to_fast_voltage: voltage (in uV) treshold used for transitioning to
  48  *                       pre-charge to fast charge mode
  49  * @mains_current_limit: maximum input current drawn from AC/DC input (in uA)
  50  * @usb_hc_current_limit: maximum input high current (in uA) drawn from USB
  51  *                        input
  52  * @chip_temp_threshold: die temperature where device starts limiting charge
  53  *                       current [%100 - %130] (in degree C)
  54  * @soft_cold_temp_limit: soft cold temperature limit [%0 - %15] (in degree C),
  55  *                        granularity is 5 deg C.
  56  * @soft_hot_temp_limit: soft hot temperature limit [%40 - %55] (in degree  C),
  57  *                       granularity is 5 deg C.
  58  * @hard_cold_temp_limit: hard cold temperature limit [%-5 - %10] (in degree C),
  59  *                        granularity is 5 deg C.
  60  * @hard_hot_temp_limit: hard hot temperature limit [%50 - %65] (in degree C),
  61  *                       granularity is 5 deg C.
  62  * @suspend_on_hard_temp_limit: suspend charging when hard limit is hit
  63  * @soft_temp_limit_compensation: compensation method when soft temperature
  64  *                                limit is hit
  65  * @charge_current_compensation: current (in uA) for charging compensation
  66  *                               current when temperature hits soft limits
  67  * @use_mains: AC/DC input can be used
  68  * @use_usb: USB input can be used
  69  * @use_usb_otg: USB OTG output can be used (not implemented yet)
  70  * @irq_gpio: GPIO number used for interrupts (%-1 if not used)
  71  * @enable_control: how charging enable/disable is controlled
  72  *                  (driver/pin controls)
  73  *
  74  * @use_main, @use_usb, and @use_usb_otg are means to enable/disable
  75  * hardware support for these. This is useful when we want to have for
  76  * example OTG charging controlled via OTG transceiver driver and not by
  77  * the SMB347 hardware.
  78  *
  79  * Hard and soft temperature limit values are given as described in the
  80  * device data sheet and assuming NTC beta value is %3750. Even if this is
  81  * not the case, these values should be used. They can be mapped to the
  82  * corresponding NTC beta values with the help of table %2 in the data
  83  * sheet. So for example if NTC beta is %3375 and we want to program hard
  84  * hot limit to be %53 deg C, @hard_hot_temp_limit should be set to %50.
  85  *
  86  * If zero value is given in any of the current and voltage values, the
  87  * factory programmed default will be used. For soft/hard temperature
  88  * values, pass in %SMB347_TEMP_USE_DEFAULT instead.
  89  */
  90 struct smb347_charger_platform_data {
  91         struct power_supply_info battery_info;
  92         unsigned int    max_charge_current;
  93         unsigned int    max_charge_voltage;
  94         unsigned int    pre_charge_current;
  95         unsigned int    termination_current;
  96         unsigned int    pre_to_fast_voltage;
  97         unsigned int    mains_current_limit;
  98         unsigned int    usb_hc_current_limit;
  99         unsigned int    chip_temp_threshold;
 100         int             soft_cold_temp_limit;
 101         int             soft_hot_temp_limit;
 102         int             hard_cold_temp_limit;
 103         int             hard_hot_temp_limit;
 104         bool            suspend_on_hard_temp_limit;
 105         unsigned int    soft_temp_limit_compensation;
 106         unsigned int    charge_current_compensation;
 107         bool            use_mains;
 108         bool            use_usb;
 109         bool            use_usb_otg;
 110         int             irq_gpio;
 111         enum smb347_chg_enable enable_control;
 112 };
 113
 114 #endif /* SMB347_CHARGER_H */