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google_dual_batt_gauge.c
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google_dual_batt_gauge.c
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2021 Google, LLC
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/printk.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
#include <misc/gvotable.h>
#include "gbms_power_supply.h"
#include "google_bms.h"
#include "google_psy.h"
#define MAX(x, y) ((x) < (y) ? (y) : (x))
#define DUAL_FG_DELAY_INIT_MS 500
#define DUAL_FG_WORK_PERIOD_MS 10000
#define DUAL_BATT_TEMP_VOTER "daul_batt_temp"
#define DUAL_BATT_BALANCE_VOTER "dual_batt_balance"
#define DUAL_BATT_BALANCE_CC_ADJUST_STEP 100000 /* 100mA */
#define DUAL_BATT_BALANCE_FV_ADJUST_STEP 10000 /* 10mV */
#define DUAL_BATT_VSEC_OFFSET 50000
#define DUAL_BATT_VSEC_OFFSET_IDX 0
static int debug_printk_prlog = LOGLEVEL_INFO;
#define logbuffer_prlog(p, level, fmt, ...) \
gbms_logbuffer_prlog(p->log, level, 0, debug_printk_prlog, fmt, ##__VA_ARGS__)
struct dual_fg_drv {
struct device *device;
struct power_supply *psy;
const char *first_fg_psy_name;
const char *second_fg_psy_name;
struct power_supply *first_fg_psy;
struct power_supply *second_fg_psy;
struct mutex fg_lock;
struct delayed_work init_work;
struct delayed_work gdbatt_work;
struct gvotable_election *fcc_votable;
struct gvotable_election *fv_votable;
struct gbms_chg_profile chg_profile;
struct gbms_chg_profile base_profile;
struct gbms_chg_profile sec_profile;
struct logbuffer *log;
struct notifier_block fg_nb;
u32 battery_capacity;
u32 base_capacity;
u32 sec_capacity;
int cc_max;
int cc_balance_offset;
int cc_balance_ratio;
int fv_balance_offset;
int base_charge_full;
int sec_charge_full;
bool init_complete;
bool resume_complete;
bool cable_in;
u32 vsec_offset;
u32 vsec_offset_max_idx;
int base_soc;
int sec_soc;
};
static int gdbatt_resume_check(struct dual_fg_drv *dual_fg_drv) {
int ret = 0;
pm_runtime_get_sync(dual_fg_drv->device);
if (!dual_fg_drv->init_complete || !dual_fg_drv->resume_complete)
ret = -EAGAIN;
pm_runtime_put_sync(dual_fg_drv->device);
return ret;
}
static enum power_supply_property gdbatt_fg_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CAPACITY, /* replace with _RAW */
POWER_SUPPLY_PROP_CHARGE_COUNTER,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, /* used from gbattery */
POWER_SUPPLY_PROP_CURRENT_AVG, /* candidate for tier switch */
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CYCLE_COUNT,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_VOLTAGE_AVG,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
};
static int gdbatt_get_temp(struct power_supply *fg_psy, int *temp)
{
int err = 0;
union power_supply_propval val;
if (!fg_psy)
return -EINVAL;
err = power_supply_get_property(fg_psy,
POWER_SUPPLY_PROP_TEMP, &val);
if (err == 0)
*temp = val.intval;
return err;
}
static int gdbatt_select_temp_idx(struct gbms_chg_profile *profile, int temp)
{
if (temp < profile->temp_limits[0] ||
temp > profile->temp_limits[profile->temp_nb_limits - 1])
return -1;
else
return gbms_msc_temp_idx(profile, temp);
}
static int gdbatt_select_voltage_idx(struct gbms_chg_profile *profile, int vbatt)
{
int vbatt_idx = 0;
while (vbatt_idx < profile->volt_nb_limits - 1 &&
vbatt > profile->volt_limits[vbatt_idx])
vbatt_idx++;
return vbatt_idx;
}
static int gdbatt_oc_cc_offset(int ibase, int isec, int cc_base, int cc_sec, int now_offset, int step)
{
int cc_offset_base = 0, cc_offset_sec = 0;
if (cc_base < 0 || cc_sec < 0 || step <= 0) {
pr_err("%s: invalid params, %d, %d, %d\n", __func__, cc_base, cc_sec, step);
return 0;
}
if (ibase > cc_base)
cc_offset_base = ((ibase - cc_base + step - 1) / step) * step;
if (isec > cc_sec)
cc_offset_sec = ((isec - cc_sec + step - 1) / step) * step;
now_offset = ((cc_offset_base + cc_offset_sec) <= now_offset) ? (now_offset) :
(now_offset + step);
pr_debug("%s: %d, %d, %d", __func__, now_offset, cc_offset_base, cc_offset_sec);
return now_offset;
}
static void gdbatt_check_current(struct dual_fg_drv *dual_fg_drv, int temp_idx, int vbat_idx)
{
int ibase, isec, cc_base, cc_sec, cc_offset, next_cc_max, cc_lowerbd;
int next_vbat_idx = vbat_idx + 1;
struct gbms_chg_profile *profile = &dual_fg_drv->chg_profile;
struct gbms_chg_profile *base_profile = &dual_fg_drv->base_profile;
struct gbms_chg_profile *sec_profile = &dual_fg_drv->sec_profile;
if (!dual_fg_drv->cable_in) {
dual_fg_drv->cc_balance_offset = 0;
dual_fg_drv->fv_balance_offset = 0;
gvotable_cast_int_vote(dual_fg_drv->fcc_votable, DUAL_BATT_BALANCE_VOTER,
0, false);
gvotable_cast_int_vote(dual_fg_drv->fv_votable, DUAL_BATT_BALANCE_VOTER,
0, false);
return;
}
/* check for the last tier */
if (next_vbat_idx >= profile->volt_nb_limits)
next_vbat_idx = vbat_idx;
next_cc_max = GBMS_CCCM_LIMITS(profile, temp_idx, next_vbat_idx);
if (next_cc_max >= dual_fg_drv->cc_max)
cc_lowerbd = (next_cc_max * dual_fg_drv->cc_balance_ratio) / 100;
else
cc_lowerbd = next_cc_max;
cc_base = GBMS_CCCM_LIMITS(base_profile, temp_idx, vbat_idx);
cc_sec= GBMS_CCCM_LIMITS(sec_profile, temp_idx, vbat_idx);
ibase = GPSY_GET_PROP(dual_fg_drv->first_fg_psy, POWER_SUPPLY_PROP_CURRENT_AVG) * -1;
isec = GPSY_GET_PROP(dual_fg_drv->second_fg_psy, POWER_SUPPLY_PROP_CURRENT_AVG) * -1;
if ((ibase > cc_base) || (isec > cc_sec)) {
const int cc_offset_max = dual_fg_drv->cc_max - cc_lowerbd;
cc_offset = gdbatt_oc_cc_offset(ibase, isec, cc_base, cc_sec,
dual_fg_drv->cc_balance_offset, DUAL_BATT_BALANCE_CC_ADJUST_STEP);
if (cc_offset > cc_offset_max)
cc_offset = cc_offset_max;
gvotable_cast_int_vote(dual_fg_drv->fcc_votable, DUAL_BATT_BALANCE_VOTER,
dual_fg_drv->cc_max - cc_offset, true);
logbuffer_prlog(dual_fg_drv, LOGLEVEL_DEBUG,
"%s: battery OC base:%d/%d sec:%d/%d cc_offset:%d->%d cc_max:%d (%d/%d)",
__func__, ibase, cc_base, isec, cc_sec,
dual_fg_drv->cc_balance_offset, cc_offset,
dual_fg_drv->cc_max - cc_offset, next_cc_max, cc_lowerbd);
dual_fg_drv->cc_balance_offset = cc_offset;
power_supply_changed(dual_fg_drv->psy);
}
}
static void gdbatt_ov_last_tier(struct dual_fg_drv *dual_fg_drv)
{
if (!dual_fg_drv->fv_votable)
dual_fg_drv->fv_votable = gvotable_election_get_handle(VOTABLE_MSC_FV);
if (dual_fg_drv->fv_votable) {
struct gbms_chg_profile *profile = &dual_fg_drv->chg_profile;
const int fv = profile->volt_limits[profile->volt_nb_limits - 1];
int fv_offset = dual_fg_drv->fv_balance_offset + DUAL_BATT_BALANCE_FV_ADJUST_STEP;
gvotable_cast_int_vote(dual_fg_drv->fv_votable, DUAL_BATT_BALANCE_VOTER,
fv - fv_offset, true);
logbuffer_prlog(dual_fg_drv, LOGLEVEL_DEBUG, "%s: battery over max fv:%d->%d",
__func__, fv, fv - fv_offset);
dual_fg_drv->fv_balance_offset = fv_offset;
}
}
static void gdbatt_ov_handler(struct dual_fg_drv *dual_fg_drv, int vbatt_idx, int temp_idx)
{
struct gbms_chg_profile *profile = &dual_fg_drv->chg_profile;
const int cc_max = dual_fg_drv->cc_max;
int next_cc_max;
int next_vbatt_idx = vbatt_idx + 1;
if (next_vbatt_idx >= profile->volt_nb_limits)
next_vbatt_idx = vbatt_idx;
next_cc_max = GBMS_CCCM_LIMITS(profile, temp_idx, next_vbatt_idx);
if (next_cc_max == cc_max) {
pr_debug("%s: skip ov for tier %d/%d", __func__, vbatt_idx, next_vbatt_idx);
return;
}
if (!dual_fg_drv->fcc_votable)
dual_fg_drv->fcc_votable = gvotable_election_get_handle(VOTABLE_MSC_FCC);
if (dual_fg_drv->fcc_votable) {
const int cc_offset_max = cc_max - next_cc_max;
int cc_offset = dual_fg_drv->cc_balance_offset + DUAL_BATT_BALANCE_CC_ADJUST_STEP;
if (cc_offset > cc_offset_max)
cc_offset = cc_offset_max;
gvotable_cast_int_vote(dual_fg_drv->fcc_votable, DUAL_BATT_BALANCE_VOTER,
cc_max - cc_offset, true);
logbuffer_prlog(dual_fg_drv, LOGLEVEL_DEBUG,"%s: battery OV cc_max:%d->%d (%d)",
__func__, cc_max, cc_max - cc_offset, next_cc_max);
dual_fg_drv->cc_balance_offset = cc_offset;
power_supply_changed(dual_fg_drv->psy);
}
}
static void gdbatt_select_cc_max(struct dual_fg_drv *dual_fg_drv)
{
struct gbms_chg_profile *profile = &dual_fg_drv->chg_profile;
int base_temp, sec_temp, base_vbatt, sec_vbatt, dual_vbatt;
int base_temp_idx, sec_temp_idx, base_vbatt_idx, sec_vbatt_idx, temp_idx, vbatt_idx;
int base_cc_max, sec_cc_max, cc_max;
struct power_supply *base_psy = dual_fg_drv->first_fg_psy;
struct power_supply *sec_psy = dual_fg_drv->second_fg_psy;
int ret = 0;
bool check_current = false;
if (!dual_fg_drv->cable_in)
goto check_done;
ret = gdbatt_get_temp(base_psy, &base_temp);
if (ret < 0)
goto check_done;
ret = gdbatt_get_temp(sec_psy, &sec_temp);
if (ret < 0)
goto check_done;
base_vbatt = GPSY_GET_PROP(base_psy, POWER_SUPPLY_PROP_VOLTAGE_NOW);
if (base_vbatt < 0)
goto check_done;
sec_vbatt = GPSY_GET_PROP(sec_psy, POWER_SUPPLY_PROP_VOLTAGE_NOW);
if (sec_vbatt < 0)
goto check_done;
dual_vbatt = (base_vbatt + sec_vbatt) / 2;
base_temp_idx = gdbatt_select_temp_idx(profile, base_temp);
sec_temp_idx = gdbatt_select_temp_idx(profile, sec_temp);
vbatt_idx = gdbatt_select_voltage_idx(profile, dual_vbatt);
if (base_vbatt > profile->volt_limits[profile->volt_nb_limits - 1])
base_vbatt_idx = profile->volt_nb_limits;
else
base_vbatt_idx = gdbatt_select_voltage_idx(profile, base_vbatt);
if (sec_vbatt > profile->volt_limits[profile->volt_nb_limits - 1]) {
sec_vbatt_idx = profile->volt_nb_limits;
} else {
const int sec_vbatt_offset = sec_vbatt - dual_fg_drv->vsec_offset;
sec_vbatt_idx = gdbatt_select_voltage_idx(profile, sec_vbatt_offset);
/* only apply offset in allowed idx */
if (sec_vbatt_idx > dual_fg_drv->vsec_offset_max_idx)
sec_vbatt_idx = gdbatt_select_voltage_idx(profile, sec_vbatt);
}
base_cc_max = GBMS_CCCM_LIMITS(profile, base_temp_idx, vbatt_idx);
sec_cc_max = GBMS_CCCM_LIMITS(profile, sec_temp_idx, vbatt_idx);
if (base_cc_max <= sec_cc_max) {
cc_max = base_cc_max;
temp_idx = base_temp_idx;
} else {
cc_max = sec_cc_max;
temp_idx = sec_temp_idx;
}
if (cc_max == dual_fg_drv->cc_max) {
if ((base_vbatt_idx > vbatt_idx) || (sec_vbatt_idx > vbatt_idx)) {
logbuffer_prlog(dual_fg_drv, LOGLEVEL_DEBUG,
"%s: battery OV v_base:%d, v_sec:%d",
__func__, base_vbatt, sec_vbatt);
if (vbatt_idx >= profile->volt_nb_limits)
gdbatt_ov_last_tier(dual_fg_drv);
else
gdbatt_ov_handler(dual_fg_drv, vbatt_idx, temp_idx);
} else {
check_current = true;
}
goto check_done;
}
if (!dual_fg_drv->fcc_votable)
dual_fg_drv->fcc_votable =
gvotable_election_get_handle(VOTABLE_MSC_FCC);
if (dual_fg_drv->fcc_votable) {
/* reset balance offset */
dual_fg_drv->cc_balance_offset = 0;
gvotable_cast_int_vote(dual_fg_drv->fcc_votable, DUAL_BATT_BALANCE_VOTER, 0, false);
/* set new cc_max by temp */
pr_info("%s: temp:%d/%d(%d/%d), vbatt:%d/%d(%d/%d), cc_max:%d/%d(%d)\n", __func__,
base_temp, sec_temp, base_temp_idx, sec_temp_idx, base_vbatt,
sec_vbatt, base_vbatt_idx, sec_vbatt_idx, base_cc_max,
sec_cc_max, cc_max);
gvotable_cast_int_vote(dual_fg_drv->fcc_votable,
DUAL_BATT_TEMP_VOTER, cc_max, true);
dual_fg_drv->cc_max = cc_max;
power_supply_changed(dual_fg_drv->psy);
}
check_done:
if (check_current || !dual_fg_drv->cable_in)
gdbatt_check_current(dual_fg_drv, temp_idx, vbatt_idx);
pr_debug("check done. cable_in=%d (%d)\n", dual_fg_drv->cable_in, ret);
}
static int gdbatt_get_capacity(struct dual_fg_drv *dual_fg_drv, int base_soc, int sec_soc)
{
const int base_full = dual_fg_drv->base_charge_full / 1000;
const int sec_full = dual_fg_drv->sec_charge_full / 1000;
const int full_sum = base_full + sec_full;
if (!base_full || !sec_full)
return (base_soc + sec_soc) / 2;
return (base_soc * base_full + sec_soc * sec_full) / full_sum;
}
#define MONITOR_SOC_DIFF 10
static void gdbatt_fg_logging(struct dual_fg_drv *dual_fg_drv, int base_soc_raw, int sec_soc_raw)
{
const int base_soc = qnum_toint(qnum_from_q8_8(base_soc_raw));
const int sec_soc = qnum_toint(qnum_from_q8_8(sec_soc_raw));
if (dual_fg_drv->base_soc == base_soc && dual_fg_drv->sec_soc == sec_soc)
return;
/* Dump registers */
if (abs(base_soc - sec_soc) >= MONITOR_SOC_DIFF) {
GPSY_SET_PROP(dual_fg_drv->first_fg_psy, GBMS_PROP_FG_REG_LOGGING, true);
GPSY_SET_PROP(dual_fg_drv->second_fg_psy, GBMS_PROP_FG_REG_LOGGING, true);
}
dual_fg_drv->base_soc = base_soc;
dual_fg_drv->sec_soc = sec_soc;
}
static void google_dual_batt_work(struct work_struct *work)
{
struct dual_fg_drv *dual_fg_drv = container_of(work, struct dual_fg_drv,
gdbatt_work.work);
struct power_supply *base_psy = dual_fg_drv->first_fg_psy;
struct power_supply *sec_psy = dual_fg_drv->second_fg_psy;
int base_data, sec_data;
mutex_lock(&dual_fg_drv->fg_lock);
if (!dual_fg_drv->init_complete)
goto done;
if (!base_psy || !sec_psy)
goto done;
gdbatt_select_cc_max(dual_fg_drv);
if (dual_fg_drv->base_charge_full && dual_fg_drv->sec_charge_full)
goto done;
base_data = GPSY_GET_PROP(base_psy, POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN);
sec_data = GPSY_GET_PROP(sec_psy, POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN);
if (base_data <= 0 || sec_data <= 0)
goto done;
dev_info(dual_fg_drv->device, "update base_charge_full:%d->%d, sec_charge_full:%d->%d\n",
dual_fg_drv->base_charge_full, base_data, dual_fg_drv->sec_charge_full, sec_data);
dual_fg_drv->base_charge_full = base_data;
dual_fg_drv->sec_charge_full = sec_data;
done:
mod_delayed_work(system_wq, &dual_fg_drv->gdbatt_work,
msecs_to_jiffies(DUAL_FG_WORK_PERIOD_MS));
mutex_unlock(&dual_fg_drv->fg_lock);
}
static int gdbatt_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct dual_fg_drv *dual_fg_drv = (struct dual_fg_drv *)
power_supply_get_drvdata(psy);
int err = 0;
union power_supply_propval fg_1;
union power_supply_propval fg_2;
err = gdbatt_resume_check(dual_fg_drv);
if (err != 0)
return err;
if (!dual_fg_drv->first_fg_psy && !dual_fg_drv->second_fg_psy)
return -EAGAIN;
if (!dual_fg_drv->first_fg_psy || !dual_fg_drv->second_fg_psy)
goto single_fg;
mutex_lock(&dual_fg_drv->fg_lock);
err = power_supply_get_property(dual_fg_drv->first_fg_psy, psp, &fg_1);
if (err != 0) {
pr_debug("error %d reading first fg prop %d\n", err, psp);
mutex_unlock(&dual_fg_drv->fg_lock);
return err;
}
err = power_supply_get_property(dual_fg_drv->second_fg_psy, psp, &fg_2);
if (err != 0) {
pr_debug("error %d reading second fg prop %d\n", err, psp);
mutex_unlock(&dual_fg_drv->fg_lock);
return err;
}
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_COUNTER:
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
case POWER_SUPPLY_PROP_CURRENT_AVG:
case POWER_SUPPLY_PROP_CURRENT_NOW:
val->intval = fg_1.intval + fg_2.intval;
break;
case POWER_SUPPLY_PROP_TEMP:
val->intval = MAX(fg_1.intval, fg_2.intval);
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
val->intval = MAX(fg_1.intval, fg_2.intval);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = (fg_1.intval + fg_2.intval)/2;
break;
case POWER_SUPPLY_PROP_VOLTAGE_AVG:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_OCV:
val->intval = (fg_1.intval + fg_2.intval)/2;
break;
case GBMS_PROP_CAPACITY_RAW:
val->intval = gdbatt_get_capacity(dual_fg_drv, fg_1.intval, fg_2.intval);
gdbatt_fg_logging(dual_fg_drv, fg_1.intval, fg_2.intval);
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = gdbatt_get_capacity(dual_fg_drv, fg_1.intval, fg_2.intval);
break;
case POWER_SUPPLY_PROP_HEALTH:
/* larger one is bad. TODO: confirm its priority */
val->intval = MAX(fg_1.intval, fg_2.intval);
break;
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_CYCLE_COUNT:
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = fg_1.intval;
if (fg_1.intval != fg_2.intval)
pr_debug("case %d not align: %d/%d",
psp, fg_1.intval, fg_2.intval);
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = fg_1.intval && fg_2.intval;
if (fg_1.intval != fg_2.intval)
pr_debug("PRESENT different: %d/%d", fg_1.intval, fg_2.intval);
break;
case POWER_SUPPLY_PROP_SERIAL_NUMBER:
/* TODO: need hash SN */
val->strval = fg_1.strval;
break;
/* support bhi */
case GBMS_PROP_HEALTH_ACT_IMPEDANCE:
case GBMS_PROP_HEALTH_IMPEDANCE:
case GBMS_PROP_RESISTANCE:
case GBMS_PROP_RESISTANCE_RAW:
case GBMS_PROP_RESISTANCE_AVG:
case GBMS_PROP_BATTERY_AGE:
case GBMS_PROP_CHARGE_FULL_ESTIMATE:
case GBMS_PROP_CAPACITY_FADE_RATE:
case GBMS_PROP_BATT_ID:
val->intval = fg_1.intval;
break;
default:
pr_debug("getting unsupported property: %d\n", psp);
break;
}
mutex_unlock(&dual_fg_drv->fg_lock);
return 0;
single_fg:
mutex_lock(&dual_fg_drv->fg_lock);
if (dual_fg_drv->first_fg_psy)
err = power_supply_get_property(dual_fg_drv->first_fg_psy, psp, val);
else if (dual_fg_drv->second_fg_psy)
err = power_supply_get_property(dual_fg_drv->second_fg_psy, psp, val);
mutex_unlock(&dual_fg_drv->fg_lock);
if (err < 0)
pr_debug("error %d reading single prop %d\n", err, psp);
return 0;
}
static int gdbatt_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct dual_fg_drv *dual_fg_drv = (struct dual_fg_drv *)
power_supply_get_drvdata(psy);
int ret = 0;
ret = gdbatt_resume_check(dual_fg_drv);
if (ret != 0)
return ret;
switch (psp) {
case GBMS_PROP_BATT_CE_CTRL:
if (dual_fg_drv->first_fg_psy) {
ret = GPSY_SET_PROP(dual_fg_drv->first_fg_psy, psp, val->intval);
if (ret < 0)
pr_err("Cannot set the first BATT_CE_CTRL, ret=%d\n", ret);
}
if (dual_fg_drv->second_fg_psy) {
ret = GPSY_SET_PROP(dual_fg_drv->second_fg_psy, psp, val->intval);
if (ret < 0)
pr_err("Cannot set the second BATT_CE_CTRL, ret=%d\n", ret);
}
dual_fg_drv->cable_in = !!val->intval;
mod_delayed_work(system_wq, &dual_fg_drv->gdbatt_work, 0);
break;
case GBMS_PROP_HEALTH_ACT_IMPEDANCE:
/* TODO: discuss with BattEng to decide save data */
/* if (dual_fg_drv->first_fg_psy) {
ret = GPSY_SET_PROP(dual_fg_drv->first_fg_psy, psp, val->intval);
if (ret < 0)
pr_err("Cannot set the first HEALTH_ACT_IMPEDANCE, ret=%d\n", ret);
} */
break;
default:
return -EINVAL;
}
if (ret < 0) {
pr_debug("gdbatt: set_prop cannot write psp=%d\n", psp);
return ret;
}
return 0;
}
static int gdbatt_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case GBMS_PROP_BATT_CE_CTRL:
return 1;
default:
break;
}
return 0;
}
static struct power_supply_desc gdbatt_psy_desc = {
.name = "dualbatt",
.type = POWER_SUPPLY_TYPE_BATTERY,
.get_property = gdbatt_get_property,
.set_property = gdbatt_set_property,
.property_is_writeable = gdbatt_property_is_writeable,
.properties = gdbatt_fg_props,
.num_properties = ARRAY_SIZE(gdbatt_fg_props),
};
/* ------------------------------------------------------------------------ */
static int gdbatt_init_pack_chg_profile(struct gbms_chg_profile *pack_profile,
struct device_node *node,
const struct gbms_chg_profile *profile,
u32 capacity_ma)
{
const u32 table_size = (profile->temp_nb_limits - 1) * profile->volt_nb_limits;
u32 ccm;
int vi, ti, ret;
/* copy profile to pack_profile */
memcpy(pack_profile, profile, sizeof(*pack_profile));
/* update C rates into pack_profile->cccm_limits */
pack_profile->cccm_limits = kzalloc(sizeof(s32) * table_size, GFP_KERNEL);
if (!pack_profile->cccm_limits)
return -ENOMEM;
ret = of_property_read_u32_array(node, "google,chg-pack-cc-limits",
pack_profile->cccm_limits,
table_size);
if (ret < 0) {
pr_err("cannot read chg-pack-cc-limits table, ret=%d\n", ret);
kfree(pack_profile->cccm_limits);
pack_profile->cccm_limits = NULL;
return -EINVAL;
}
/* chg-battery-capacity is in mAh, chg-cc-limits relative to 100 */
for (ti = 0; ti < pack_profile->temp_nb_limits - 1; ti++) {
for (vi = 0; vi < pack_profile->volt_nb_limits; vi++) {
ccm = GBMS_CCCM_LIMITS(pack_profile, ti, vi);
ccm *= capacity_ma * 10;
GBMS_CCCM_LIMITS_SET(pack_profile, ti, vi) = ccm;
}
}
return ret;
}
static int gdbatt_init_chg_profile(struct dual_fg_drv *dual_fg_drv)
{
struct device_node *node = of_find_node_by_name(NULL, "google,battery");
struct device_node *dual_fg_node = dual_fg_drv->device->of_node;
struct gbms_chg_profile *profile = &dual_fg_drv->chg_profile;
int ret = 0;
if (profile->cccm_limits)
return 0;
ret = gbms_init_chg_profile(profile, node);
if (ret < 0)
return -EINVAL;
ret = of_property_read_u32(node, "google,chg-battery-capacity",
&dual_fg_drv->battery_capacity);
if (ret < 0)
pr_warn("battery not present, no default capacity, zero charge table\n");
ret = of_property_read_u32(dual_fg_node, "google,chg-base-battery-capacity",
&dual_fg_drv->base_capacity);
if (ret < 0)
pr_warn("base battery not present, no default capacity, zero charge table\n");
ret = of_property_read_u32(dual_fg_node, "google,chg-sec-battery-capacity",
&dual_fg_drv->sec_capacity);
if (ret < 0)
pr_warn("secondary battery not present, no default capacity, zero charge table\n");
gbms_init_chg_table(profile, node, dual_fg_drv->battery_capacity);
ret = gdbatt_init_pack_chg_profile(&dual_fg_drv->base_profile, dual_fg_node, profile,
dual_fg_drv->base_capacity);
if (ret < 0)
return ret;
ret = gdbatt_init_pack_chg_profile(&dual_fg_drv->sec_profile, dual_fg_node, profile,
dual_fg_drv->sec_capacity);
if (ret < 0)
return ret;
return ret;
}
static int psy_changed(struct notifier_block *nb,
unsigned long action, void *data)
{
struct power_supply *psy = data;
struct dual_fg_drv *dual_fg_drv = container_of(nb, struct dual_fg_drv, fg_nb);
if ((action != PSY_EVENT_PROP_CHANGED) || (psy == NULL) || (psy->desc == NULL) ||
(psy->desc->name == NULL))
return NOTIFY_OK;
pr_debug("name=%s evt=%lu\n", psy->desc->name, action);
if (action == PSY_EVENT_PROP_CHANGED) {
bool is_first_fg = (dual_fg_drv->first_fg_psy_name != NULL) &&
!strcmp(psy->desc->name, dual_fg_drv->first_fg_psy_name);
bool is_second_fg = (dual_fg_drv->second_fg_psy_name != NULL) &&
!strcmp(psy->desc->name, dual_fg_drv->second_fg_psy_name);
if (is_first_fg || is_second_fg)
power_supply_changed(dual_fg_drv->psy);
}
return NOTIFY_OK;
}
static void google_dual_batt_gauge_init_work(struct work_struct *work)
{
struct dual_fg_drv *dual_fg_drv = container_of(work, struct dual_fg_drv,
init_work.work);
struct power_supply *first_fg_psy = dual_fg_drv->first_fg_psy;
struct power_supply *second_fg_psy = dual_fg_drv->second_fg_psy;
union power_supply_propval val;
int err = 0;
if (!dual_fg_drv->first_fg_psy && dual_fg_drv->first_fg_psy_name) {
first_fg_psy = power_supply_get_by_name(dual_fg_drv->first_fg_psy_name);
if (!first_fg_psy) {
dev_info(dual_fg_drv->device,
"failed to get \"%s\" power supply, retrying...\n",
dual_fg_drv->first_fg_psy_name);
goto retry_init_work;
}
dual_fg_drv->first_fg_psy = first_fg_psy;
/* Don't use it if battery not present */
err = power_supply_get_property(first_fg_psy,
POWER_SUPPLY_PROP_PRESENT, &val);
if (err == -EAGAIN)
goto retry_init_work;
if (err == 0 && val.intval == 0) {
dev_info(dual_fg_drv->device, "First battery not PRESENT\n");
dual_fg_drv->first_fg_psy_name = NULL;
dual_fg_drv->first_fg_psy = NULL;
}
}
if (!dual_fg_drv->second_fg_psy && dual_fg_drv->second_fg_psy_name) {
second_fg_psy = power_supply_get_by_name(dual_fg_drv->second_fg_psy_name);
if (!second_fg_psy) {
pr_info("failed to get \"%s\" power supply, retrying...\n",
dual_fg_drv->second_fg_psy_name);
goto retry_init_work;
}
dual_fg_drv->second_fg_psy = second_fg_psy;
/* Don't use it if battery not present */
err = power_supply_get_property(second_fg_psy,
POWER_SUPPLY_PROP_PRESENT, &val);
if (err == -EAGAIN)
goto retry_init_work;
if (err == 0 && val.intval == 0) {
dev_info(dual_fg_drv->device, "Second battery not PRESENT\n");
dual_fg_drv->second_fg_psy_name = NULL;
dual_fg_drv->second_fg_psy = NULL;
}
}
dual_fg_drv->cc_max = -1;
err = gdbatt_init_chg_profile(dual_fg_drv);
if (err < 0)
dev_info(dual_fg_drv->device,"fail to init chg profile (%d)\n", err);
dual_fg_drv->fg_nb.notifier_call = psy_changed;
err = power_supply_reg_notifier(&dual_fg_drv->fg_nb);
if (err < 0)
pr_err("cannot register power supply notifer (%d)\n", err);
dual_fg_drv->init_complete = true;
dual_fg_drv->resume_complete = true;
dual_fg_drv->base_charge_full = 0;
dual_fg_drv->sec_charge_full = 0;
mod_delayed_work(system_wq, &dual_fg_drv->gdbatt_work, 0);
dev_info(dual_fg_drv->device, "google_dual_batt_gauge_init_work done\n");
return;
retry_init_work:
schedule_delayed_work(&dual_fg_drv->init_work,
msecs_to_jiffies(DUAL_FG_DELAY_INIT_MS));
}
static int google_dual_batt_gauge_probe(struct platform_device *pdev)
{
const char *first_fg_psy_name;
const char *second_fg_psy_name;
struct dual_fg_drv *dual_fg_drv;
struct power_supply_config psy_cfg = {};
struct dentry *de;
int ret;
dual_fg_drv = devm_kzalloc(&pdev->dev, sizeof(*dual_fg_drv), GFP_KERNEL);
if (!dual_fg_drv)
return -ENOMEM;
dual_fg_drv->device = &pdev->dev;
ret = of_property_read_string(pdev->dev.of_node, "google,first-fg-psy-name",
&first_fg_psy_name);
if (ret == 0) {
pr_info("google,first-fg-psy-name=%s\n", first_fg_psy_name);
dual_fg_drv->first_fg_psy_name = devm_kstrdup(&pdev->dev,
first_fg_psy_name, GFP_KERNEL);
if (!dual_fg_drv->first_fg_psy_name)
return -ENOMEM;
}
ret = of_property_read_string(pdev->dev.of_node, "google,second-fg-psy-name",
&second_fg_psy_name);
if (ret == 0) {
pr_info("google,second-fg-psy-name=%s\n", second_fg_psy_name);
dual_fg_drv->second_fg_psy_name = devm_kstrdup(&pdev->dev, second_fg_psy_name,
GFP_KERNEL);
if (!dual_fg_drv->second_fg_psy_name)
return -ENOMEM;
}
if (!dual_fg_drv->first_fg_psy_name && !dual_fg_drv->second_fg_psy_name) {
pr_err("no dual gauge setting\n");
return -EINVAL;
}
ret = of_property_read_u32(pdev->dev.of_node, "google,vsec-offset",
&dual_fg_drv->vsec_offset);
if (ret < 0) {
pr_debug("Couldn't set vsec_offset (%d)\n", ret);
dual_fg_drv->vsec_offset = DUAL_BATT_VSEC_OFFSET;
}
INIT_DELAYED_WORK(&dual_fg_drv->init_work, google_dual_batt_gauge_init_work);
INIT_DELAYED_WORK(&dual_fg_drv->gdbatt_work, google_dual_batt_work);
mutex_init(&dual_fg_drv->fg_lock);
platform_set_drvdata(pdev, dual_fg_drv);
psy_cfg.drv_data = dual_fg_drv;
psy_cfg.of_node = pdev->dev.of_node;
if (of_property_read_bool(pdev->dev.of_node, "google,psy-type-unknown"))
gdbatt_psy_desc.type = POWER_SUPPLY_TYPE_UNKNOWN;
dual_fg_drv->psy = devm_power_supply_register(dual_fg_drv->device,
&gdbatt_psy_desc, &psy_cfg);
if (IS_ERR(dual_fg_drv->psy)) {
ret = PTR_ERR(dual_fg_drv->psy);
if (ret == -EPROBE_DEFER)
return -EPROBE_DEFER;
/* TODO: fail with -ENODEV */
dev_err(dual_fg_drv->device,
"Couldn't register as power supply, ret=%d\n", ret);
}
ret = of_property_read_u32(pdev->dev.of_node, "google,cc-balance-ratio",
&dual_fg_drv->cc_balance_ratio);
if (ret < 0)
dual_fg_drv->cc_balance_ratio = 100;
ret = of_property_read_u32(pdev->dev.of_node, "google,vfloat-offset-max-idx",
&dual_fg_drv->vsec_offset_max_idx);
if (ret < 0)
dual_fg_drv->vsec_offset_max_idx = DUAL_BATT_VSEC_OFFSET_IDX;
dual_fg_drv->log = logbuffer_register("dual_batt");
if (IS_ERR(dual_fg_drv->log)) {
dev_err(dual_fg_drv->device, "Couldn't register logbuffer, (%ld)\n",
PTR_ERR(dual_fg_drv->log));
dual_fg_drv->log = NULL;
}
/* debugfs */
de = debugfs_create_dir("google_dual_batt", 0);
if (IS_ERR_OR_NULL(de))
dev_err(dual_fg_drv->device, "Couldn't create debugfs, (%ld)\n", PTR_ERR(de));
else
debugfs_create_u32("debug_level", 0644, de, &debug_printk_prlog);
schedule_delayed_work(&dual_fg_drv->init_work,
msecs_to_jiffies(DUAL_FG_DELAY_INIT_MS));
pr_info("google_dual_batt_gauge_probe done\n");
return 0;
}
static int google_dual_batt_gauge_remove(struct platform_device *pdev)
{
struct dual_fg_drv *dual_fg_drv = platform_get_drvdata(pdev);
gbms_free_chg_profile(&dual_fg_drv->chg_profile);
kfree(dual_fg_drv->base_profile.cccm_limits);
kfree(dual_fg_drv->sec_profile.cccm_limits);
if (dual_fg_drv->log)
logbuffer_unregister(dual_fg_drv->log);
return 0;
}
static int __maybe_unused google_dual_batt_pm_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct dual_fg_drv *dual_fg_drv = platform_get_drvdata(pdev);
pm_runtime_get_sync(dual_fg_drv->device);
dual_fg_drv->resume_complete = false;
pm_runtime_put_sync(dual_fg_drv->device);
return 0;
}
static int __maybe_unused google_dual_batt_pm_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct dual_fg_drv *dual_fg_drv = platform_get_drvdata(pdev);
pm_runtime_get_sync(dual_fg_drv->device);
dual_fg_drv->resume_complete = true;
pm_runtime_put_sync(dual_fg_drv->device);
return 0;
}
static const struct dev_pm_ops google_dual_batt_pm_ops = {
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(google_dual_batt_pm_suspend, google_dual_batt_pm_resume)
};
static const struct of_device_id google_dual_batt_gauge_of_match[] = {
{.compatible = "google,dual_batt_gauge"},
{},
};
MODULE_DEVICE_TABLE(of, google_dual_batt_gauge_of_match);
static struct platform_driver google_dual_batt_gauge_driver = {
.driver = {
.name = "google,dual_batt_gauge",
.owner = THIS_MODULE,
.of_match_table = google_dual_batt_gauge_of_match,
.probe_type = PROBE_PREFER_ASYNCHRONOUS,