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241 lines
7.2 KiB
241 lines
7.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/export.h> |
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#include <linux/power_supply.h> |
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#include <linux/of.h> |
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#include "ab8500-bm.h" |
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/* Default: under this temperature, charging is stopped */ |
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#define AB8500_TEMP_UNDER 3 |
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/* Default: between this temp and AB8500_TEMP_UNDER charging is reduced */ |
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#define AB8500_TEMP_LOW 8 |
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/* Default: between this temp and AB8500_TEMP_OVER charging is reduced */ |
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#define AB8500_TEMP_HIGH 43 |
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/* Default: over this temp, charging is stopped */ |
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#define AB8500_TEMP_OVER 48 |
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/* Default: temperature hysteresis */ |
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#define AB8500_TEMP_HYSTERESIS 3 |
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static struct power_supply_battery_ocv_table ocv_cap_tbl[] = { |
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{ .ocv = 4186000, .capacity = 100}, |
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{ .ocv = 4163000, .capacity = 99}, |
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{ .ocv = 4114000, .capacity = 95}, |
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{ .ocv = 4068000, .capacity = 90}, |
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{ .ocv = 3990000, .capacity = 80}, |
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{ .ocv = 3926000, .capacity = 70}, |
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{ .ocv = 3898000, .capacity = 65}, |
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{ .ocv = 3866000, .capacity = 60}, |
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{ .ocv = 3833000, .capacity = 55}, |
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{ .ocv = 3812000, .capacity = 50}, |
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{ .ocv = 3787000, .capacity = 40}, |
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{ .ocv = 3768000, .capacity = 30}, |
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{ .ocv = 3747000, .capacity = 25}, |
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{ .ocv = 3730000, .capacity = 20}, |
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{ .ocv = 3705000, .capacity = 15}, |
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{ .ocv = 3699000, .capacity = 14}, |
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{ .ocv = 3684000, .capacity = 12}, |
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{ .ocv = 3672000, .capacity = 9}, |
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{ .ocv = 3657000, .capacity = 7}, |
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{ .ocv = 3638000, .capacity = 6}, |
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{ .ocv = 3556000, .capacity = 4}, |
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{ .ocv = 3424000, .capacity = 2}, |
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{ .ocv = 3317000, .capacity = 1}, |
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{ .ocv = 3094000, .capacity = 0}, |
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}; |
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/* |
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* Note that the batres_vs_temp table must be strictly sorted by falling |
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* temperature values to work. Factory resistance is 300 mOhm and the |
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* resistance values to the right are percentages of 300 mOhm. |
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*/ |
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static struct power_supply_resistance_temp_table temp_to_batres_tbl_thermistor[] = { |
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{ .temp = 40, .resistance = 40 /* 120 mOhm */ }, |
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{ .temp = 30, .resistance = 45 /* 135 mOhm */ }, |
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{ .temp = 20, .resistance = 55 /* 165 mOhm */ }, |
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{ .temp = 10, .resistance = 77 /* 230 mOhm */ }, |
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{ .temp = 00, .resistance = 108 /* 325 mOhm */ }, |
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{ .temp = -10, .resistance = 158 /* 445 mOhm */ }, |
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{ .temp = -20, .resistance = 198 /* 595 mOhm */ }, |
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}; |
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static struct power_supply_maintenance_charge_table ab8500_maint_charg_table[] = { |
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{ |
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/* Maintenance charging phase A, 60 hours */ |
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.charge_current_max_ua = 400000, |
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.charge_voltage_max_uv = 4050000, |
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.charge_safety_timer_minutes = 60*60, |
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}, |
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{ |
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/* Maintenance charging phase B, 200 hours */ |
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.charge_current_max_ua = 400000, |
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.charge_voltage_max_uv = 4000000, |
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.charge_safety_timer_minutes = 200*60, |
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} |
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}; |
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static const struct ab8500_bm_capacity_levels cap_levels = { |
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.critical = 2, |
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.low = 10, |
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.normal = 70, |
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.high = 95, |
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.full = 100, |
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}; |
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static const struct ab8500_fg_parameters fg = { |
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.recovery_sleep_timer = 10, |
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.recovery_total_time = 100, |
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.init_timer = 1, |
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.init_discard_time = 5, |
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.init_total_time = 40, |
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.high_curr_time = 60, |
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.accu_charging = 30, |
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.accu_high_curr = 30, |
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.high_curr_threshold_ua = 50000, |
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.lowbat_threshold_uv = 3100000, |
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.battok_falling_th_sel0 = 2860, |
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.battok_raising_th_sel1 = 2860, |
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.maint_thres = 95, |
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.user_cap_limit = 15, |
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.pcut_enable = 1, |
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.pcut_max_time = 127, |
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.pcut_flag_time = 112, |
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.pcut_max_restart = 15, |
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.pcut_debounce_time = 2, |
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}; |
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static const struct ab8500_maxim_parameters ab8500_maxi_params = { |
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.ena_maxi = true, |
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.chg_curr_ua = 910000, |
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.wait_cycles = 10, |
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.charger_curr_step_ua = 100000, |
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}; |
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static const struct ab8500_bm_charger_parameters chg = { |
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.usb_volt_max_uv = 5500000, |
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.usb_curr_max_ua = 1500000, |
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.ac_volt_max_uv = 7500000, |
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.ac_curr_max_ua = 1500000, |
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}; |
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/* This is referenced directly in the charger code */ |
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struct ab8500_bm_data ab8500_bm_data = { |
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.main_safety_tmr_h = 4, |
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.temp_interval_chg = 20, |
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.temp_interval_nochg = 120, |
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.usb_safety_tmr_h = 4, |
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.bkup_bat_v = BUP_VCH_SEL_2P6V, |
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.bkup_bat_i = BUP_ICH_SEL_150UA, |
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.capacity_scaling = false, |
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.chg_unknown_bat = false, |
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.enable_overshoot = false, |
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.fg_res = 100, |
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.cap_levels = &cap_levels, |
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.interval_charging = 5, |
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.interval_not_charging = 120, |
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.maxi = &ab8500_maxi_params, |
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.chg_params = &chg, |
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.fg_params = &fg, |
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}; |
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int ab8500_bm_of_probe(struct power_supply *psy, |
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struct ab8500_bm_data *bm) |
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{ |
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struct power_supply_battery_info *bi; |
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struct device *dev = &psy->dev; |
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int ret; |
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ret = power_supply_get_battery_info(psy, &bm->bi); |
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if (ret) { |
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dev_err(dev, "cannot retrieve battery info\n"); |
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return ret; |
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} |
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bi = bm->bi; |
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/* Fill in defaults for any data missing from the device tree */ |
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if (bi->charge_full_design_uah < 0) |
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/* The default capacity is 612 mAh for unknown batteries */ |
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bi->charge_full_design_uah = 612000; |
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/* |
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* All of these voltages need to be specified or we will simply |
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* fall back to safe defaults. |
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*/ |
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if ((bi->voltage_min_design_uv < 0) || |
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(bi->voltage_max_design_uv < 0)) { |
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/* Nominal voltage is 3.7V for unknown batteries */ |
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bi->voltage_min_design_uv = 3700000; |
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/* Termination voltage 4.05V */ |
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bi->voltage_max_design_uv = 4050000; |
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} |
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if (bi->constant_charge_current_max_ua < 0) |
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bi->constant_charge_current_max_ua = 400000; |
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if (bi->constant_charge_voltage_max_uv < 0) |
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bi->constant_charge_voltage_max_uv = 4100000; |
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if (bi->charge_term_current_ua) |
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/* Charging stops when we drop below this current */ |
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bi->charge_term_current_ua = 200000; |
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if (!bi->maintenance_charge || !bi->maintenance_charge_size) { |
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bi->maintenance_charge = ab8500_maint_charg_table; |
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bi->maintenance_charge_size = ARRAY_SIZE(ab8500_maint_charg_table); |
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} |
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if (bi->alert_low_temp_charge_current_ua < 0 || |
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bi->alert_low_temp_charge_voltage_uv < 0) |
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{ |
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bi->alert_low_temp_charge_current_ua = 300000; |
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bi->alert_low_temp_charge_voltage_uv = 4000000; |
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} |
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if (bi->alert_high_temp_charge_current_ua < 0 || |
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bi->alert_high_temp_charge_voltage_uv < 0) |
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{ |
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bi->alert_high_temp_charge_current_ua = 300000; |
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bi->alert_high_temp_charge_voltage_uv = 4000000; |
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} |
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/* |
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* Internal resistance and factory resistance are tightly coupled |
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* so both MUST be defined or we fall back to defaults. |
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*/ |
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if ((bi->factory_internal_resistance_uohm < 0) || |
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!bi->resist_table) { |
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bi->factory_internal_resistance_uohm = 300000; |
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bi->resist_table = temp_to_batres_tbl_thermistor; |
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bi->resist_table_size = ARRAY_SIZE(temp_to_batres_tbl_thermistor); |
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} |
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/* The default battery is emulated by a resistor at 7K */ |
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if (bi->bti_resistance_ohm < 0 || |
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bi->bti_resistance_tolerance < 0) { |
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bi->bti_resistance_ohm = 7000; |
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bi->bti_resistance_tolerance = 20; |
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} |
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if (!bi->ocv_table[0]) { |
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/* Default capacity table at say 25 degrees Celsius */ |
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bi->ocv_temp[0] = 25; |
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bi->ocv_table[0] = ocv_cap_tbl; |
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bi->ocv_table_size[0] = ARRAY_SIZE(ocv_cap_tbl); |
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} |
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if (bi->temp_min == INT_MIN) |
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bi->temp_min = AB8500_TEMP_UNDER; |
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if (bi->temp_max == INT_MAX) |
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bi->temp_max = AB8500_TEMP_OVER; |
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if (bi->temp_alert_min == INT_MIN) |
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bi->temp_alert_min = AB8500_TEMP_LOW; |
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if (bi->temp_alert_max == INT_MAX) |
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bi->temp_alert_max = AB8500_TEMP_HIGH; |
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bm->temp_hysteresis = AB8500_TEMP_HYSTERESIS; |
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return 0; |
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} |
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void ab8500_bm_of_remove(struct power_supply *psy, |
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struct ab8500_bm_data *bm) |
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{ |
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power_supply_put_battery_info(psy, bm->bi); |
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}
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