f3a71a6eb1
Add power on reset (POR) init procedure defined by the maxim appnote. Using this procedure ensures that the part is configured/initialized correctly at POR and improves early accuracy of the fuel gauge and informs the fuel gauge with the battery characterization parameters. The battery characterization parameters come from the maxim characterization procedure. Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
197 lines
4.8 KiB
C
197 lines
4.8 KiB
C
/*
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* Fuel gauge driver for Maxim 17042 / 8966 / 8997
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* Note that Maxim 8966 and 8997 are mfd and this is its subdevice.
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*
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* Copyright (C) 2011 Samsung Electronics
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* MyungJoo Ham <myungjoo.ham@samsung.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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __MAX17042_BATTERY_H_
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#define __MAX17042_BATTERY_H_
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#define MAX17042_STATUS_BattAbsent (1 << 3)
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#define MAX17042_BATTERY_FULL (100)
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#define MAX17042_DEFAULT_SNS_RESISTOR (10000)
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#define MAX17042_CHARACTERIZATION_DATA_SIZE 48
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enum max17042_register {
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MAX17042_STATUS = 0x00,
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MAX17042_VALRT_Th = 0x01,
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MAX17042_TALRT_Th = 0x02,
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MAX17042_SALRT_Th = 0x03,
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MAX17042_AtRate = 0x04,
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MAX17042_RepCap = 0x05,
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MAX17042_RepSOC = 0x06,
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MAX17042_Age = 0x07,
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MAX17042_TEMP = 0x08,
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MAX17042_VCELL = 0x09,
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MAX17042_Current = 0x0A,
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MAX17042_AvgCurrent = 0x0B,
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MAX17042_SOC = 0x0D,
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MAX17042_AvSOC = 0x0E,
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MAX17042_RemCap = 0x0F,
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MAX17042_FullCAP = 0x10,
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MAX17042_TTE = 0x11,
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MAX17042_V_empty = 0x12,
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MAX17042_RSLOW = 0x14,
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MAX17042_AvgTA = 0x16,
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MAX17042_Cycles = 0x17,
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MAX17042_DesignCap = 0x18,
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MAX17042_AvgVCELL = 0x19,
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MAX17042_MinMaxTemp = 0x1A,
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MAX17042_MinMaxVolt = 0x1B,
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MAX17042_MinMaxCurr = 0x1C,
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MAX17042_CONFIG = 0x1D,
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MAX17042_ICHGTerm = 0x1E,
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MAX17042_AvCap = 0x1F,
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MAX17042_ManName = 0x20,
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MAX17042_DevName = 0x21,
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MAX17042_FullCAPNom = 0x23,
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MAX17042_TempNom = 0x24,
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MAX17042_TempLim = 0x25,
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MAX17042_TempHot = 0x26,
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MAX17042_AIN = 0x27,
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MAX17042_LearnCFG = 0x28,
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MAX17042_FilterCFG = 0x29,
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MAX17042_RelaxCFG = 0x2A,
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MAX17042_MiscCFG = 0x2B,
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MAX17042_TGAIN = 0x2C,
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MAx17042_TOFF = 0x2D,
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MAX17042_CGAIN = 0x2E,
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MAX17042_COFF = 0x2F,
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MAX17042_MaskSOC = 0x32,
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MAX17042_SOC_empty = 0x33,
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MAX17042_T_empty = 0x34,
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MAX17042_FullCAP0 = 0x35,
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MAX17042_LAvg_empty = 0x36,
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MAX17042_FCTC = 0x37,
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MAX17042_RCOMP0 = 0x38,
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MAX17042_TempCo = 0x39,
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MAX17042_EmptyTempCo = 0x3A,
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MAX17042_K_empty0 = 0x3B,
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MAX17042_TaskPeriod = 0x3C,
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MAX17042_FSTAT = 0x3D,
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MAX17042_SHDNTIMER = 0x3F,
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MAX17042_dQacc = 0x45,
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MAX17042_dPacc = 0x46,
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MAX17042_VFSOC0 = 0x48,
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MAX17042_QH = 0x4D,
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MAX17042_QL = 0x4E,
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MAX17042_VFSOC0Enable = 0x60,
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MAX17042_MLOCKReg1 = 0x62,
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MAX17042_MLOCKReg2 = 0x63,
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MAX17042_MODELChrTbl = 0x80,
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MAX17042_OCV = 0xEE,
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MAX17042_OCVInternal = 0xFB,
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MAX17042_VFSOC = 0xFF,
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};
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/*
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* used for setting a register to a desired value
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* addr : address for a register
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* data : setting value for the register
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*/
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struct max17042_reg_data {
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u8 addr;
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u16 data;
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};
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struct max17042_config_data {
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/* External current sense resistor value in milli-ohms */
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u32 cur_sense_val;
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/* A/D measurement */
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u16 tgain; /* 0x2C */
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u16 toff; /* 0x2D */
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u16 cgain; /* 0x2E */
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u16 coff; /* 0x2F */
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/* Alert / Status */
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u16 valrt_thresh; /* 0x01 */
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u16 talrt_thresh; /* 0x02 */
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u16 soc_alrt_thresh; /* 0x03 */
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u16 config; /* 0x01D */
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u16 shdntimer; /* 0x03F */
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/* App data */
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u16 design_cap; /* 0x18 */
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u16 ichgt_term; /* 0x1E */
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/* MG3 config */
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u16 at_rate; /* 0x04 */
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u16 learn_cfg; /* 0x28 */
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u16 filter_cfg; /* 0x29 */
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u16 relax_cfg; /* 0x2A */
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u16 misc_cfg; /* 0x2B */
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u16 masksoc; /* 0x32 */
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/* MG3 save and restore */
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u16 fullcap; /* 0x10 */
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u16 fullcapnom; /* 0x23 */
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u16 socempty; /* 0x33 */
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u16 lavg_empty; /* 0x36 */
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u16 dqacc; /* 0x45 */
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u16 dpacc; /* 0x46 */
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/* Cell technology from power_supply.h */
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u16 cell_technology;
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/* Cell Data */
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u16 vempty; /* 0x12 */
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u16 temp_nom; /* 0x24 */
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u16 temp_lim; /* 0x25 */
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u16 fctc; /* 0x37 */
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u16 rcomp0; /* 0x38 */
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u16 tcompc0; /* 0x39 */
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u16 empty_tempco; /* 0x3A */
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u16 kempty0; /* 0x3B */
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u16 cell_char_tbl[MAX17042_CHARACTERIZATION_DATA_SIZE];
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} __packed;
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struct max17042_platform_data {
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struct max17042_reg_data *init_data;
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struct max17042_config_data *config_data;
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int num_init_data; /* Number of enties in init_data array */
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bool enable_current_sense;
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bool enable_por_init; /* Use POR init from Maxim appnote */
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/*
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* R_sns in micro-ohms.
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* default 10000 (if r_sns = 0) as it is the recommended value by
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* the datasheet although it can be changed by board designers.
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*/
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unsigned int r_sns;
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};
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#endif /* __MAX17042_BATTERY_H_ */
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