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      1 /*
      2  * Copyright (C) 2011-2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <dirent.h>
     18 #include <errno.h>
     19 #include <fcntl.h>
     20 #include <inttypes.h>
     21 #include <linux/input.h>
     22 #include <stdbool.h>
     23 #include <stdio.h>
     24 #include <stdlib.h>
     25 #include <string.h>
     26 #include <sys/epoll.h>
     27 #include <sys/stat.h>
     28 #include <sys/types.h>
     29 #include <sys/un.h>
     30 #include <time.h>
     31 #include <unistd.h>
     32 
     33 #include <sys/socket.h>
     34 #include <linux/netlink.h>
     35 
     36 #include <batteryservice/BatteryService.h>
     37 #include <cutils/android_reboot.h>
     38 #include <cutils/klog.h>
     39 #include <cutils/misc.h>
     40 #include <cutils/uevent.h>
     41 #include <cutils/properties.h>
     42 
     43 #ifdef CHARGER_ENABLE_SUSPEND
     44 #include <suspend/autosuspend.h>
     45 #endif
     46 
     47 #include "minui/minui.h"
     48 
     49 #include "healthd.h"
     50 
     51 char *locale;
     52 
     53 #ifndef max
     54 #define max(a,b) ((a) > (b) ? (a) : (b))
     55 #endif
     56 
     57 #ifndef min
     58 #define min(a,b) ((a) < (b) ? (a) : (b))
     59 #endif
     60 
     61 #define ARRAY_SIZE(x)           (sizeof(x)/sizeof(x[0]))
     62 
     63 #define MSEC_PER_SEC            (1000LL)
     64 #define NSEC_PER_MSEC           (1000000LL)
     65 
     66 #define BATTERY_UNKNOWN_TIME    (2 * MSEC_PER_SEC)
     67 #define POWER_ON_KEY_TIME       (2 * MSEC_PER_SEC)
     68 #define UNPLUGGED_SHUTDOWN_TIME (10 * MSEC_PER_SEC)
     69 
     70 #define BATTERY_FULL_THRESH     95
     71 
     72 #define LAST_KMSG_PATH          "/proc/last_kmsg"
     73 #define LAST_KMSG_PSTORE_PATH   "/sys/fs/pstore/console-ramoops"
     74 #define LAST_KMSG_MAX_SZ        (32 * 1024)
     75 
     76 #define LOGE(x...) do { KLOG_ERROR("charger", x); } while (0)
     77 #define LOGW(x...) do { KLOG_WARNING("charger", x); } while (0)
     78 #define LOGV(x...) do { KLOG_DEBUG("charger", x); } while (0)
     79 
     80 struct key_state {
     81     bool pending;
     82     bool down;
     83     int64_t timestamp;
     84 };
     85 
     86 struct frame {
     87     int disp_time;
     88     int min_capacity;
     89     bool level_only;
     90 
     91     GRSurface* surface;
     92 };
     93 
     94 struct animation {
     95     bool run;
     96 
     97     struct frame *frames;
     98     int cur_frame;
     99     int num_frames;
    100 
    101     int cur_cycle;
    102     int num_cycles;
    103 
    104     /* current capacity being animated */
    105     int capacity;
    106 };
    107 
    108 struct charger {
    109     bool have_battery_state;
    110     bool charger_connected;
    111     int64_t next_screen_transition;
    112     int64_t next_key_check;
    113     int64_t next_pwr_check;
    114 
    115     struct key_state keys[KEY_MAX + 1];
    116 
    117     struct animation *batt_anim;
    118     GRSurface* surf_unknown;
    119     int boot_min_cap;
    120 };
    121 
    122 static struct frame batt_anim_frames[] = {
    123     {
    124         .disp_time = 750,
    125         .min_capacity = 0,
    126         .level_only = false,
    127         .surface = NULL,
    128     },
    129     {
    130         .disp_time = 750,
    131         .min_capacity = 20,
    132         .level_only = false,
    133         .surface = NULL,
    134     },
    135     {
    136         .disp_time = 750,
    137         .min_capacity = 40,
    138         .level_only = false,
    139         .surface = NULL,
    140     },
    141     {
    142         .disp_time = 750,
    143         .min_capacity = 60,
    144         .level_only = false,
    145         .surface = NULL,
    146     },
    147     {
    148         .disp_time = 750,
    149         .min_capacity = 80,
    150         .level_only = true,
    151         .surface = NULL,
    152     },
    153     {
    154         .disp_time = 750,
    155         .min_capacity = BATTERY_FULL_THRESH,
    156         .level_only = false,
    157         .surface = NULL,
    158     },
    159 };
    160 
    161 static struct animation battery_animation = {
    162     .run = false,
    163     .frames = batt_anim_frames,
    164     .cur_frame = 0,
    165     .num_frames = ARRAY_SIZE(batt_anim_frames),
    166     .cur_cycle = 0,
    167     .num_cycles = 3,
    168     .capacity = 0,
    169 };
    170 
    171 static struct charger charger_state;
    172 static struct healthd_config *healthd_config;
    173 static struct android::BatteryProperties *batt_prop;
    174 static int char_width;
    175 static int char_height;
    176 static bool minui_inited;
    177 
    178 /* current time in milliseconds */
    179 static int64_t curr_time_ms(void)
    180 {
    181     struct timespec tm;
    182     clock_gettime(CLOCK_MONOTONIC, &tm);
    183     return tm.tv_sec * MSEC_PER_SEC + (tm.tv_nsec / NSEC_PER_MSEC);
    184 }
    185 
    186 static void clear_screen(void)
    187 {
    188     gr_color(0, 0, 0, 255);
    189     gr_clear();
    190 }
    191 
    192 #define MAX_KLOG_WRITE_BUF_SZ 256
    193 
    194 static void dump_last_kmsg(void)
    195 {
    196     char *buf;
    197     char *ptr;
    198     unsigned sz = 0;
    199     int len;
    200 
    201     LOGW("\n");
    202     LOGW("*************** LAST KMSG ***************\n");
    203     LOGW("\n");
    204     buf = (char *)load_file(LAST_KMSG_PSTORE_PATH, &sz);
    205 
    206     if (!buf || !sz) {
    207         buf = (char *)load_file(LAST_KMSG_PATH, &sz);
    208         if (!buf || !sz) {
    209             LOGW("last_kmsg not found. Cold reset?\n");
    210             goto out;
    211         }
    212     }
    213 
    214     len = min(sz, LAST_KMSG_MAX_SZ);
    215     ptr = buf + (sz - len);
    216 
    217     while (len > 0) {
    218         int cnt = min(len, MAX_KLOG_WRITE_BUF_SZ);
    219         char yoink;
    220         char *nl;
    221 
    222         nl = (char *)memrchr(ptr, '\n', cnt - 1);
    223         if (nl)
    224             cnt = nl - ptr + 1;
    225 
    226         yoink = ptr[cnt];
    227         ptr[cnt] = '\0';
    228         klog_write(6, "<4>%s", ptr);
    229         ptr[cnt] = yoink;
    230 
    231         len -= cnt;
    232         ptr += cnt;
    233     }
    234 
    235     free(buf);
    236 
    237 out:
    238     LOGW("\n");
    239     LOGW("************* END LAST KMSG *************\n");
    240     LOGW("\n");
    241 }
    242 
    243 #ifdef CHARGER_ENABLE_SUSPEND
    244 static int request_suspend(bool enable)
    245 {
    246     if (enable)
    247         return autosuspend_enable();
    248     else
    249         return autosuspend_disable();
    250 }
    251 #else
    252 static int request_suspend(bool /*enable*/)
    253 {
    254     return 0;
    255 }
    256 #endif
    257 
    258 static int draw_text(const char *str, int x, int y)
    259 {
    260     int str_len_px = gr_measure(str);
    261 
    262     if (x < 0)
    263         x = (gr_fb_width() - str_len_px) / 2;
    264     if (y < 0)
    265         y = (gr_fb_height() - char_height) / 2;
    266     gr_text(x, y, str, 0);
    267 
    268     return y + char_height;
    269 }
    270 
    271 static void android_green(void)
    272 {
    273     gr_color(0xa4, 0xc6, 0x39, 255);
    274 }
    275 
    276 /* returns the last y-offset of where the surface ends */
    277 static int draw_surface_centered(struct charger* /*charger*/, GRSurface* surface)
    278 {
    279     int w;
    280     int h;
    281     int x;
    282     int y;
    283 
    284     w = gr_get_width(surface);
    285     h = gr_get_height(surface);
    286     x = (gr_fb_width() - w) / 2 ;
    287     y = (gr_fb_height() - h) / 2 ;
    288 
    289     LOGV("drawing surface %dx%d+%d+%d\n", w, h, x, y);
    290     gr_blit(surface, 0, 0, w, h, x, y);
    291     return y + h;
    292 }
    293 
    294 static void draw_unknown(struct charger *charger)
    295 {
    296     int y;
    297     if (charger->surf_unknown) {
    298         draw_surface_centered(charger, charger->surf_unknown);
    299     } else {
    300         android_green();
    301         y = draw_text("Charging!", -1, -1);
    302         draw_text("?\?/100", -1, y + 25);
    303     }
    304 }
    305 
    306 static void draw_battery(struct charger *charger)
    307 {
    308     struct animation *batt_anim = charger->batt_anim;
    309     struct frame *frame = &batt_anim->frames[batt_anim->cur_frame];
    310 
    311     if (batt_anim->num_frames != 0) {
    312         draw_surface_centered(charger, frame->surface);
    313         LOGV("drawing frame #%d min_cap=%d time=%d\n",
    314              batt_anim->cur_frame, frame->min_capacity,
    315              frame->disp_time);
    316     }
    317 }
    318 
    319 static void redraw_screen(struct charger *charger)
    320 {
    321     struct animation *batt_anim = charger->batt_anim;
    322 
    323     clear_screen();
    324 
    325     /* try to display *something* */
    326     if (batt_anim->capacity < 0 || batt_anim->num_frames == 0)
    327         draw_unknown(charger);
    328     else
    329         draw_battery(charger);
    330     gr_flip();
    331 }
    332 
    333 static void kick_animation(struct animation *anim)
    334 {
    335     anim->run = true;
    336 }
    337 
    338 static void reset_animation(struct animation *anim)
    339 {
    340     anim->cur_cycle = 0;
    341     anim->cur_frame = 0;
    342     anim->run = false;
    343 }
    344 
    345 static void update_screen_state(struct charger *charger, int64_t now)
    346 {
    347     struct animation *batt_anim = charger->batt_anim;
    348     int disp_time;
    349 
    350     if (!batt_anim->run || now < charger->next_screen_transition)
    351         return;
    352 
    353     if (!minui_inited) {
    354 
    355         if (healthd_config && healthd_config->screen_on) {
    356             if (!healthd_config->screen_on(batt_prop)) {
    357                 LOGV("[%" PRId64 "] leave screen off\n", now);
    358                 batt_anim->run = false;
    359                 charger->next_screen_transition = -1;
    360                 if (charger->charger_connected)
    361                     request_suspend(true);
    362                 return;
    363             }
    364         }
    365 
    366         gr_init();
    367         gr_font_size(&char_width, &char_height);
    368 
    369 #ifndef CHARGER_DISABLE_INIT_BLANK
    370         gr_fb_blank(true);
    371 #endif
    372         minui_inited = true;
    373     }
    374 
    375     /* animation is over, blank screen and leave */
    376     if (batt_anim->cur_cycle == batt_anim->num_cycles) {
    377         reset_animation(batt_anim);
    378         charger->next_screen_transition = -1;
    379         gr_fb_blank(true);
    380         LOGV("[%" PRId64 "] animation done\n", now);
    381         if (charger->charger_connected)
    382             request_suspend(true);
    383         return;
    384     }
    385 
    386     disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time;
    387 
    388     /* animation starting, set up the animation */
    389     if (batt_anim->cur_frame == 0) {
    390 
    391         LOGV("[%" PRId64 "] animation starting\n", now);
    392         if (batt_prop && batt_prop->batteryLevel >= 0 && batt_anim->num_frames != 0) {
    393             int i;
    394 
    395             /* find first frame given current capacity */
    396             for (i = 1; i < batt_anim->num_frames; i++) {
    397                 if (batt_prop->batteryLevel < batt_anim->frames[i].min_capacity)
    398                     break;
    399             }
    400             batt_anim->cur_frame = i - 1;
    401 
    402             /* show the first frame for twice as long */
    403             disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time * 2;
    404         }
    405         if (batt_prop)
    406             batt_anim->capacity = batt_prop->batteryLevel;
    407     }
    408 
    409     /* unblank the screen  on first cycle */
    410     if (batt_anim->cur_cycle == 0)
    411         gr_fb_blank(false);
    412 
    413     /* draw the new frame (@ cur_frame) */
    414     redraw_screen(charger);
    415 
    416     /* if we don't have anim frames, we only have one image, so just bump
    417      * the cycle counter and exit
    418      */
    419     if (batt_anim->num_frames == 0 || batt_anim->capacity < 0) {
    420         LOGV("[%" PRId64 "] animation missing or unknown battery status\n", now);
    421         charger->next_screen_transition = now + BATTERY_UNKNOWN_TIME;
    422         batt_anim->cur_cycle++;
    423         return;
    424     }
    425 
    426     /* schedule next screen transition */
    427     charger->next_screen_transition = now + disp_time;
    428 
    429     /* advance frame cntr to the next valid frame only if we are charging
    430      * if necessary, advance cycle cntr, and reset frame cntr
    431      */
    432     if (charger->charger_connected) {
    433         batt_anim->cur_frame++;
    434 
    435         /* if the frame is used for level-only, that is only show it when it's
    436          * the current level, skip it during the animation.
    437          */
    438         while (batt_anim->cur_frame < batt_anim->num_frames &&
    439                batt_anim->frames[batt_anim->cur_frame].level_only)
    440             batt_anim->cur_frame++;
    441         if (batt_anim->cur_frame >= batt_anim->num_frames) {
    442             batt_anim->cur_cycle++;
    443             batt_anim->cur_frame = 0;
    444 
    445             /* don't reset the cycle counter, since we use that as a signal
    446              * in a test above to check if animation is over
    447              */
    448         }
    449     } else {
    450         /* Stop animating if we're not charging.
    451          * If we stop it immediately instead of going through this loop, then
    452          * the animation would stop somewhere in the middle.
    453          */
    454         batt_anim->cur_frame = 0;
    455         batt_anim->cur_cycle++;
    456     }
    457 }
    458 
    459 static int set_key_callback(int code, int value, void *data)
    460 {
    461     struct charger *charger = (struct charger *)data;
    462     int64_t now = curr_time_ms();
    463     int down = !!value;
    464 
    465     if (code > KEY_MAX)
    466         return -1;
    467 
    468     /* ignore events that don't modify our state */
    469     if (charger->keys[code].down == down)
    470         return 0;
    471 
    472     /* only record the down even timestamp, as the amount
    473      * of time the key spent not being pressed is not useful */
    474     if (down)
    475         charger->keys[code].timestamp = now;
    476     charger->keys[code].down = down;
    477     charger->keys[code].pending = true;
    478     if (down) {
    479         LOGV("[%" PRId64 "] key[%d] down\n", now, code);
    480     } else {
    481         int64_t duration = now - charger->keys[code].timestamp;
    482         int64_t secs = duration / 1000;
    483         int64_t msecs = duration - secs * 1000;
    484         LOGV("[%" PRId64 "] key[%d] up (was down for %" PRId64 ".%" PRId64 "sec)\n",
    485              now, code, secs, msecs);
    486     }
    487 
    488     return 0;
    489 }
    490 
    491 static void update_input_state(struct charger *charger,
    492                                struct input_event *ev)
    493 {
    494     if (ev->type != EV_KEY)
    495         return;
    496     set_key_callback(ev->code, ev->value, charger);
    497 }
    498 
    499 static void set_next_key_check(struct charger *charger,
    500                                struct key_state *key,
    501                                int64_t timeout)
    502 {
    503     int64_t then = key->timestamp + timeout;
    504 
    505     if (charger->next_key_check == -1 || then < charger->next_key_check)
    506         charger->next_key_check = then;
    507 }
    508 
    509 static void process_key(struct charger *charger, int code, int64_t now)
    510 {
    511     struct key_state *key = &charger->keys[code];
    512 
    513     if (code == KEY_POWER) {
    514         if (key->down) {
    515             int64_t reboot_timeout = key->timestamp + POWER_ON_KEY_TIME;
    516             if (now >= reboot_timeout) {
    517                 /* We do not currently support booting from charger mode on
    518                    all devices. Check the property and continue booting or reboot
    519                    accordingly. */
    520                 if (property_get_bool("ro.enable_boot_charger_mode", false)) {
    521                     LOGW("[%" PRId64 "] booting from charger mode\n", now);
    522                     property_set("sys.boot_from_charger_mode", "1");
    523                 } else {
    524                     if (charger->batt_anim->capacity >= charger->boot_min_cap) {
    525                         LOGW("[%" PRId64 "] rebooting\n", now);
    526                         android_reboot(ANDROID_RB_RESTART, 0, 0);
    527                     } else {
    528                         LOGV("[%" PRId64 "] ignore power-button press, battery level "
    529                             "less than minimum\n", now);
    530                     }
    531                 }
    532             } else {
    533                 /* if the key is pressed but timeout hasn't expired,
    534                  * make sure we wake up at the right-ish time to check
    535                  */
    536                 set_next_key_check(charger, key, POWER_ON_KEY_TIME);
    537 
    538                /* Turn on the display and kick animation on power-key press
    539                 * rather than on key release
    540                 */
    541                 kick_animation(charger->batt_anim);
    542                 request_suspend(false);
    543             }
    544         } else {
    545             /* if the power key got released, force screen state cycle */
    546             if (key->pending) {
    547                 kick_animation(charger->batt_anim);
    548             }
    549         }
    550     }
    551 
    552     key->pending = false;
    553 }
    554 
    555 static void handle_input_state(struct charger *charger, int64_t now)
    556 {
    557     process_key(charger, KEY_POWER, now);
    558 
    559     if (charger->next_key_check != -1 && now > charger->next_key_check)
    560         charger->next_key_check = -1;
    561 }
    562 
    563 static void handle_power_supply_state(struct charger *charger, int64_t now)
    564 {
    565     if (!charger->have_battery_state)
    566         return;
    567 
    568     if (!charger->charger_connected) {
    569 
    570         /* Last cycle would have stopped at the extreme top of battery-icon
    571          * Need to show the correct level corresponding to capacity.
    572          */
    573         kick_animation(charger->batt_anim);
    574         request_suspend(false);
    575         if (charger->next_pwr_check == -1) {
    576             charger->next_pwr_check = now + UNPLUGGED_SHUTDOWN_TIME;
    577             LOGW("[%" PRId64 "] device unplugged: shutting down in %" PRId64 " (@ %" PRId64 ")\n",
    578                  now, (int64_t)UNPLUGGED_SHUTDOWN_TIME, charger->next_pwr_check);
    579         } else if (now >= charger->next_pwr_check) {
    580             LOGW("[%" PRId64 "] shutting down\n", now);
    581             android_reboot(ANDROID_RB_POWEROFF, 0, 0);
    582         } else {
    583             /* otherwise we already have a shutdown timer scheduled */
    584         }
    585     } else {
    586         /* online supply present, reset shutdown timer if set */
    587         if (charger->next_pwr_check != -1) {
    588             LOGW("[%" PRId64 "] device plugged in: shutdown cancelled\n", now);
    589             kick_animation(charger->batt_anim);
    590         }
    591         charger->next_pwr_check = -1;
    592     }
    593 }
    594 
    595 void healthd_mode_charger_heartbeat()
    596 {
    597     struct charger *charger = &charger_state;
    598     int64_t now = curr_time_ms();
    599 
    600     handle_input_state(charger, now);
    601     handle_power_supply_state(charger, now);
    602 
    603     /* do screen update last in case any of the above want to start
    604      * screen transitions (animations, etc)
    605      */
    606     update_screen_state(charger, now);
    607 }
    608 
    609 void healthd_mode_charger_battery_update(
    610     struct android::BatteryProperties *props)
    611 {
    612     struct charger *charger = &charger_state;
    613 
    614     charger->charger_connected =
    615         props->chargerAcOnline || props->chargerUsbOnline ||
    616         props->chargerWirelessOnline;
    617 
    618     if (!charger->have_battery_state) {
    619         charger->have_battery_state = true;
    620         charger->next_screen_transition = curr_time_ms() - 1;
    621         reset_animation(charger->batt_anim);
    622         kick_animation(charger->batt_anim);
    623     }
    624     batt_prop = props;
    625 }
    626 
    627 int healthd_mode_charger_preparetowait(void)
    628 {
    629     struct charger *charger = &charger_state;
    630     int64_t now = curr_time_ms();
    631     int64_t next_event = INT64_MAX;
    632     int64_t timeout;
    633 
    634     LOGV("[%" PRId64 "] next screen: %" PRId64 " next key: %" PRId64 " next pwr: %" PRId64 "\n", now,
    635          charger->next_screen_transition, charger->next_key_check,
    636          charger->next_pwr_check);
    637 
    638     if (charger->next_screen_transition != -1)
    639         next_event = charger->next_screen_transition;
    640     if (charger->next_key_check != -1 && charger->next_key_check < next_event)
    641         next_event = charger->next_key_check;
    642     if (charger->next_pwr_check != -1 && charger->next_pwr_check < next_event)
    643         next_event = charger->next_pwr_check;
    644 
    645     if (next_event != -1 && next_event != INT64_MAX)
    646         timeout = max(0, next_event - now);
    647     else
    648         timeout = -1;
    649 
    650    return (int)timeout;
    651 }
    652 
    653 static int input_callback(int fd, unsigned int epevents, void *data)
    654 {
    655     struct charger *charger = (struct charger *)data;
    656     struct input_event ev;
    657     int ret;
    658 
    659     ret = ev_get_input(fd, epevents, &ev);
    660     if (ret)
    661         return -1;
    662     update_input_state(charger, &ev);
    663     return 0;
    664 }
    665 
    666 static void charger_event_handler(uint32_t /*epevents*/)
    667 {
    668     int ret;
    669 
    670     ret = ev_wait(-1);
    671     if (!ret)
    672         ev_dispatch();
    673 }
    674 
    675 void healthd_mode_charger_init(struct healthd_config* config)
    676 {
    677     int ret;
    678     struct charger *charger = &charger_state;
    679     int i;
    680     int epollfd;
    681 
    682     dump_last_kmsg();
    683 
    684     LOGW("--------------- STARTING CHARGER MODE ---------------\n");
    685 
    686     ret = ev_init(input_callback, charger);
    687     if (!ret) {
    688         epollfd = ev_get_epollfd();
    689         healthd_register_event(epollfd, charger_event_handler);
    690     }
    691 
    692     ret = res_create_display_surface("charger/battery_fail", &charger->surf_unknown);
    693     if (ret < 0) {
    694         LOGE("Cannot load battery_fail image\n");
    695         charger->surf_unknown = NULL;
    696     }
    697 
    698     charger->batt_anim = &battery_animation;
    699 
    700     GRSurface** scale_frames;
    701     int scale_count;
    702     ret = res_create_multi_display_surface("charger/battery_scale", &scale_count, &scale_frames);
    703     if (ret < 0) {
    704         LOGE("Cannot load battery_scale image\n");
    705         charger->batt_anim->num_frames = 0;
    706         charger->batt_anim->num_cycles = 1;
    707     } else if (scale_count != charger->batt_anim->num_frames) {
    708         LOGE("battery_scale image has unexpected frame count (%d, expected %d)\n",
    709              scale_count, charger->batt_anim->num_frames);
    710         charger->batt_anim->num_frames = 0;
    711         charger->batt_anim->num_cycles = 1;
    712     } else {
    713         for (i = 0; i < charger->batt_anim->num_frames; i++) {
    714             charger->batt_anim->frames[i].surface = scale_frames[i];
    715         }
    716     }
    717 
    718     ev_sync_key_state(set_key_callback, charger);
    719 
    720     charger->next_screen_transition = -1;
    721     charger->next_key_check = -1;
    722     charger->next_pwr_check = -1;
    723     healthd_config = config;
    724     charger->boot_min_cap = config->boot_min_cap;
    725 }
    726