diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/ab8500_chargalg.c | 105 |
1 files changed, 6 insertions, 99 deletions
diff --git a/drivers/power/supply/ab8500_chargalg.c b/drivers/power/supply/ab8500_chargalg.c index bcf85ae6828e..9f9a84ad2da2 100644 --- a/drivers/power/supply/ab8500_chargalg.c +++ b/drivers/power/supply/ab8500_chargalg.c @@ -46,9 +46,6 @@ /* Five minutes expressed in seconds */ #define FIVE_MINUTES_IN_SECONDS 300 -#define CHARGALG_CURR_STEP_LOW_UA 0 -#define CHARGALG_CURR_STEP_HIGH_UA 100000 - /* * This is the battery capacity limit that will trigger a new * full charging cycle in the case where maintenance charging @@ -86,11 +83,6 @@ struct ab8500_chargalg_suspension_status { bool usb_suspended; }; -struct ab8500_chargalg_current_step_status { - bool curr_step_change; - int curr_step_ua; -}; - struct ab8500_chargalg_battery_data { int temp; int volt_uv; @@ -186,8 +178,6 @@ struct ab8500_chargalg_events { * struct ab8500_charge_curr_maximization - Charger maximization parameters * @original_iset_ua: the non optimized/maximised charger current * @current_iset_ua: the charging current used at this moment - * @test_delta_i_ua: the delta between the current we want to charge and the - current that is really going into the battery * @condition_cnt: number of iterations needed before a new charger current is set * @max_current_ua: maximum charger current @@ -200,7 +190,6 @@ struct ab8500_chargalg_events { struct ab8500_charge_curr_maximization { int original_iset_ua; int current_iset_ua; - int test_delta_i_ua; int condition_cnt; int max_current_ua; int wait_cnt; @@ -229,7 +218,6 @@ enum maxim_ret { * @batt_data: data of the battery * @susp_status: current charger suspension status * @bm: Platform specific battery management information - * @curr_status: Current step status for over-current protection * @parent: pointer to the struct ab8500 * @chargalg_psy: structure that holds the battery properties exposed by * the charging algorithm @@ -255,7 +243,6 @@ struct ab8500_chargalg { struct ab8500_chargalg_battery_data batt_data; struct ab8500_chargalg_suspension_status susp_status; struct ab8500 *parent; - struct ab8500_chargalg_current_step_status curr_status; struct ab8500_bm_data *bm; struct power_supply *chargalg_psy; struct ux500_charger *ac_chg; @@ -421,22 +408,6 @@ static int ab8500_chargalg_check_charger_connection(struct ab8500_chargalg *di) } /** - * ab8500_chargalg_check_current_step_status() - Check charging current - * step status. - * @di: pointer to the ab8500_chargalg structure - * - * This function will check if there is a change in the charging current step - * and change charge state accordingly. - */ -static void ab8500_chargalg_check_current_step_status - (struct ab8500_chargalg *di) -{ - if (di->curr_status.curr_step_change) - ab8500_chargalg_state_to(di, STATE_NORMAL_INIT); - di->curr_status.curr_step_change = false; -} - -/** * ab8500_chargalg_start_safety_timer() - Start charging safety timer * @di: pointer to the ab8500_chargalg structure * @@ -831,7 +802,6 @@ static void init_maxim_chg_curr(struct ab8500_chargalg *di) di->ccm.original_iset_ua = bi->constant_charge_current_max_ua; di->ccm.current_iset_ua = bi->constant_charge_current_max_ua; - di->ccm.test_delta_i_ua = di->bm->maxi->charger_curr_step_ua; di->ccm.max_current_ua = di->bm->maxi->chg_curr_ua; di->ccm.condition_cnt = di->bm->maxi->wait_cycles; di->ccm.level = 0; @@ -862,8 +832,7 @@ static enum maxim_ret ab8500_chargalg_chg_curr_maxim(struct ab8500_chargalg *di) dev_dbg(di->dev, "lowering current\n"); di->ccm.wait_cnt++; di->ccm.condition_cnt = di->bm->maxi->wait_cycles; - di->ccm.max_current_ua = - di->ccm.current_iset_ua - di->ccm.test_delta_i_ua; + di->ccm.max_current_ua = di->ccm.current_iset_ua; di->ccm.current_iset_ua = di->ccm.max_current_ua; di->ccm.level--; return MAXIM_RET_CHANGE; @@ -893,29 +862,8 @@ static enum maxim_ret ab8500_chargalg_chg_curr_maxim(struct ab8500_chargalg *di) return MAXIM_RET_IBAT_TOO_HIGH; } - if (delta_i_ua > di->ccm.test_delta_i_ua && - (di->ccm.current_iset_ua + di->ccm.test_delta_i_ua) < - di->ccm.max_current_ua) { - if (di->ccm.condition_cnt-- == 0) { - /* Increse the iset with cco.test_delta_i */ - di->ccm.condition_cnt = di->bm->maxi->wait_cycles; - di->ccm.current_iset_ua += di->ccm.test_delta_i_ua; - di->ccm.level++; - dev_dbg(di->dev, " Maximization needed, increase" - " with %d uA to %duA (Optimal ibat: %d uA)" - " Level %d\n", - di->ccm.test_delta_i_ua, - di->ccm.current_iset_ua, - di->ccm.original_iset_ua, - di->ccm.level); - return MAXIM_RET_CHANGE; - } else { - return MAXIM_RET_NOACTION; - } - } else { - di->ccm.condition_cnt = di->bm->maxi->wait_cycles; - return MAXIM_RET_NOACTION; - } + di->ccm.condition_cnt = di->bm->maxi->wait_cycles; + return MAXIM_RET_NOACTION; } static void handle_maxim_chg_curr(struct ab8500_chargalg *di) @@ -1302,7 +1250,6 @@ static void ab8500_chargalg_algorithm(struct ab8500_chargalg *di) struct power_supply_battery_info *bi = di->bm->bi; int charger_status; int ret; - int curr_step_lvl_ua; /* Collect data from all power_supply class devices */ class_for_each_device(power_supply_class, NULL, @@ -1313,7 +1260,6 @@ static void ab8500_chargalg_algorithm(struct ab8500_chargalg *di) ab8500_chargalg_check_charger_voltage(di); charger_status = ab8500_chargalg_check_charger_connection(di); - ab8500_chargalg_check_current_step_status(di); if (is_ab8500(di->parent)) { ret = ab8500_chargalg_check_charger_enable(di); @@ -1511,15 +1457,13 @@ static void ab8500_chargalg_algorithm(struct ab8500_chargalg *di) break; case STATE_NORMAL_INIT: - if (di->curr_status.curr_step_ua == CHARGALG_CURR_STEP_LOW_UA) + if (bi->constant_charge_current_max_ua == 0) + /* "charging" with 0 uA */ ab8500_chargalg_stop_charging(di); else { - curr_step_lvl_ua = bi->constant_charge_current_max_ua - * di->curr_status.curr_step_ua - / CHARGALG_CURR_STEP_HIGH_UA; ab8500_chargalg_start_charging(di, bi->constant_charge_voltage_max_uv, - curr_step_lvl_ua); + bi->constant_charge_current_max_ua); } ab8500_chargalg_state_to(di, STATE_NORMAL); @@ -1742,37 +1686,6 @@ static int ab8500_chargalg_get_property(struct power_supply *psy, /* Exposure to the sysfs interface */ -static ssize_t ab8500_chargalg_curr_step_show(struct ab8500_chargalg *di, - char *buf) -{ - return sprintf(buf, "%d\n", di->curr_status.curr_step_ua); -} - -static ssize_t ab8500_chargalg_curr_step_store(struct ab8500_chargalg *di, - const char *buf, size_t length) -{ - long param; - int ret; - - ret = kstrtol(buf, 10, ¶m); - if (ret < 0) - return ret; - - di->curr_status.curr_step_ua = param; - if (di->curr_status.curr_step_ua >= CHARGALG_CURR_STEP_LOW_UA && - di->curr_status.curr_step_ua <= CHARGALG_CURR_STEP_HIGH_UA) { - di->curr_status.curr_step_change = true; - queue_work(di->chargalg_wq, &di->chargalg_work); - } else - dev_info(di->dev, "Wrong current step\n" - "Enter 0. Disable AC/USB Charging\n" - "1--100. Set AC/USB charging current step\n" - "100. Enable AC/USB Charging\n"); - - return strlen(buf); -} - - static ssize_t ab8500_chargalg_en_show(struct ab8500_chargalg *di, char *buf) { @@ -1832,10 +1745,6 @@ static struct ab8500_chargalg_sysfs_entry ab8500_chargalg_en_charger = __ATTR(chargalg, 0644, ab8500_chargalg_en_show, ab8500_chargalg_en_store); -static struct ab8500_chargalg_sysfs_entry ab8500_chargalg_curr_step = - __ATTR(chargalg_curr_step, 0644, ab8500_chargalg_curr_step_show, - ab8500_chargalg_curr_step_store); - static ssize_t ab8500_chargalg_sysfs_show(struct kobject *kobj, struct attribute *attr, char *buf) { @@ -1868,7 +1777,6 @@ static ssize_t ab8500_chargalg_sysfs_charger(struct kobject *kobj, static struct attribute *ab8500_chargalg_chg[] = { &ab8500_chargalg_en_charger.attr, - &ab8500_chargalg_curr_step.attr, NULL, }; @@ -2057,7 +1965,6 @@ static int ab8500_chargalg_probe(struct platform_device *pdev) dev_err(di->dev, "failed to create sysfs entry\n"); return ret; } - di->curr_status.curr_step_ua = CHARGALG_CURR_STEP_HIGH_UA; dev_info(di->dev, "probe success\n"); return component_add(dev, &ab8500_chargalg_component_ops); |