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-rw-r--r--drivers/power/supply/ab8500_bmdata.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/drivers/power/supply/ab8500_bmdata.c b/drivers/power/supply/ab8500_bmdata.c
new file mode 100644
index 0000000000..3e6ea22372
--- /dev/null
+++ b/drivers/power/supply/ab8500_bmdata.c
@@ -0,0 +1,241 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/export.h>
+#include <linux/power_supply.h>
+#include <linux/of.h>
+
+#include "ab8500-bm.h"
+
+/* Default: under this temperature, charging is stopped */
+#define AB8500_TEMP_UNDER 3
+/* Default: between this temp and AB8500_TEMP_UNDER charging is reduced */
+#define AB8500_TEMP_LOW 8
+/* Default: between this temp and AB8500_TEMP_OVER charging is reduced */
+#define AB8500_TEMP_HIGH 43
+/* Default: over this temp, charging is stopped */
+#define AB8500_TEMP_OVER 48
+/* Default: temperature hysteresis */
+#define AB8500_TEMP_HYSTERESIS 3
+
+static struct power_supply_battery_ocv_table ocv_cap_tbl[] = {
+ { .ocv = 4186000, .capacity = 100},
+ { .ocv = 4163000, .capacity = 99},
+ { .ocv = 4114000, .capacity = 95},
+ { .ocv = 4068000, .capacity = 90},
+ { .ocv = 3990000, .capacity = 80},
+ { .ocv = 3926000, .capacity = 70},
+ { .ocv = 3898000, .capacity = 65},
+ { .ocv = 3866000, .capacity = 60},
+ { .ocv = 3833000, .capacity = 55},
+ { .ocv = 3812000, .capacity = 50},
+ { .ocv = 3787000, .capacity = 40},
+ { .ocv = 3768000, .capacity = 30},
+ { .ocv = 3747000, .capacity = 25},
+ { .ocv = 3730000, .capacity = 20},
+ { .ocv = 3705000, .capacity = 15},
+ { .ocv = 3699000, .capacity = 14},
+ { .ocv = 3684000, .capacity = 12},
+ { .ocv = 3672000, .capacity = 9},
+ { .ocv = 3657000, .capacity = 7},
+ { .ocv = 3638000, .capacity = 6},
+ { .ocv = 3556000, .capacity = 4},
+ { .ocv = 3424000, .capacity = 2},
+ { .ocv = 3317000, .capacity = 1},
+ { .ocv = 3094000, .capacity = 0},
+};
+
+/*
+ * Note that the batres_vs_temp table must be strictly sorted by falling
+ * temperature values to work. Factory resistance is 300 mOhm and the
+ * resistance values to the right are percentages of 300 mOhm.
+ */
+static struct power_supply_resistance_temp_table temp_to_batres_tbl_thermistor[] = {
+ { .temp = 40, .resistance = 40 /* 120 mOhm */ },
+ { .temp = 30, .resistance = 45 /* 135 mOhm */ },
+ { .temp = 20, .resistance = 55 /* 165 mOhm */ },
+ { .temp = 10, .resistance = 77 /* 230 mOhm */ },
+ { .temp = 00, .resistance = 108 /* 325 mOhm */ },
+ { .temp = -10, .resistance = 158 /* 445 mOhm */ },
+ { .temp = -20, .resistance = 198 /* 595 mOhm */ },
+};
+
+static struct power_supply_maintenance_charge_table ab8500_maint_charg_table[] = {
+ {
+ /* Maintenance charging phase A, 60 hours */
+ .charge_current_max_ua = 400000,
+ .charge_voltage_max_uv = 4050000,
+ .charge_safety_timer_minutes = 60*60,
+ },
+ {
+ /* Maintenance charging phase B, 200 hours */
+ .charge_current_max_ua = 400000,
+ .charge_voltage_max_uv = 4000000,
+ .charge_safety_timer_minutes = 200*60,
+ }
+};
+
+static const struct ab8500_bm_capacity_levels cap_levels = {
+ .critical = 2,
+ .low = 10,
+ .normal = 70,
+ .high = 95,
+ .full = 100,
+};
+
+static const struct ab8500_fg_parameters fg = {
+ .recovery_sleep_timer = 10,
+ .recovery_total_time = 100,
+ .init_timer = 1,
+ .init_discard_time = 5,
+ .init_total_time = 40,
+ .high_curr_time = 60,
+ .accu_charging = 30,
+ .accu_high_curr = 30,
+ .high_curr_threshold_ua = 50000,
+ .lowbat_threshold_uv = 3100000,
+ .battok_falling_th_sel0 = 2860,
+ .battok_raising_th_sel1 = 2860,
+ .maint_thres = 95,
+ .user_cap_limit = 15,
+ .pcut_enable = 1,
+ .pcut_max_time = 127,
+ .pcut_flag_time = 112,
+ .pcut_max_restart = 15,
+ .pcut_debounce_time = 2,
+};
+
+static const struct ab8500_maxim_parameters ab8500_maxi_params = {
+ .ena_maxi = true,
+ .chg_curr_ua = 910000,
+ .wait_cycles = 10,
+ .charger_curr_step_ua = 100000,
+};
+
+static const struct ab8500_bm_charger_parameters chg = {
+ .usb_volt_max_uv = 5500000,
+ .usb_curr_max_ua = 1500000,
+ .ac_volt_max_uv = 7500000,
+ .ac_curr_max_ua = 1500000,
+};
+
+/* This is referenced directly in the charger code */
+struct ab8500_bm_data ab8500_bm_data = {
+ .main_safety_tmr_h = 4,
+ .temp_interval_chg = 20,
+ .temp_interval_nochg = 120,
+ .usb_safety_tmr_h = 4,
+ .bkup_bat_v = BUP_VCH_SEL_2P6V,
+ .bkup_bat_i = BUP_ICH_SEL_150UA,
+ .capacity_scaling = false,
+ .chg_unknown_bat = false,
+ .enable_overshoot = false,
+ .fg_res = 100,
+ .cap_levels = &cap_levels,
+ .interval_charging = 5,
+ .interval_not_charging = 120,
+ .maxi = &ab8500_maxi_params,
+ .chg_params = &chg,
+ .fg_params = &fg,
+};
+
+int ab8500_bm_of_probe(struct power_supply *psy,
+ struct ab8500_bm_data *bm)
+{
+ struct power_supply_battery_info *bi;
+ struct device *dev = &psy->dev;
+ int ret;
+
+ ret = power_supply_get_battery_info(psy, &bm->bi);
+ if (ret) {
+ dev_err(dev, "cannot retrieve battery info\n");
+ return ret;
+ }
+ bi = bm->bi;
+
+ /* Fill in defaults for any data missing from the device tree */
+ if (bi->charge_full_design_uah < 0)
+ /* The default capacity is 612 mAh for unknown batteries */
+ bi->charge_full_design_uah = 612000;
+
+ /*
+ * All of these voltages need to be specified or we will simply
+ * fall back to safe defaults.
+ */
+ if ((bi->voltage_min_design_uv < 0) ||
+ (bi->voltage_max_design_uv < 0)) {
+ /* Nominal voltage is 3.7V for unknown batteries */
+ bi->voltage_min_design_uv = 3700000;
+ /* Termination voltage 4.05V */
+ bi->voltage_max_design_uv = 4050000;
+ }
+
+ if (bi->constant_charge_current_max_ua < 0)
+ bi->constant_charge_current_max_ua = 400000;
+
+ if (bi->constant_charge_voltage_max_uv < 0)
+ bi->constant_charge_voltage_max_uv = 4100000;
+
+ if (bi->charge_term_current_ua)
+ /* Charging stops when we drop below this current */
+ bi->charge_term_current_ua = 200000;
+
+ if (!bi->maintenance_charge || !bi->maintenance_charge_size) {
+ bi->maintenance_charge = ab8500_maint_charg_table;
+ bi->maintenance_charge_size = ARRAY_SIZE(ab8500_maint_charg_table);
+ }
+
+ if (bi->alert_low_temp_charge_current_ua < 0 ||
+ bi->alert_low_temp_charge_voltage_uv < 0)
+ {
+ bi->alert_low_temp_charge_current_ua = 300000;
+ bi->alert_low_temp_charge_voltage_uv = 4000000;
+ }
+ if (bi->alert_high_temp_charge_current_ua < 0 ||
+ bi->alert_high_temp_charge_voltage_uv < 0)
+ {
+ bi->alert_high_temp_charge_current_ua = 300000;
+ bi->alert_high_temp_charge_voltage_uv = 4000000;
+ }
+
+ /*
+ * Internal resistance and factory resistance are tightly coupled
+ * so both MUST be defined or we fall back to defaults.
+ */
+ if ((bi->factory_internal_resistance_uohm < 0) ||
+ !bi->resist_table) {
+ bi->factory_internal_resistance_uohm = 300000;
+ bi->resist_table = temp_to_batres_tbl_thermistor;
+ bi->resist_table_size = ARRAY_SIZE(temp_to_batres_tbl_thermistor);
+ }
+
+ /* The default battery is emulated by a resistor at 7K */
+ if (bi->bti_resistance_ohm < 0 ||
+ bi->bti_resistance_tolerance < 0) {
+ bi->bti_resistance_ohm = 7000;
+ bi->bti_resistance_tolerance = 20;
+ }
+
+ if (!bi->ocv_table[0]) {
+ /* Default capacity table at say 25 degrees Celsius */
+ bi->ocv_temp[0] = 25;
+ bi->ocv_table[0] = ocv_cap_tbl;
+ bi->ocv_table_size[0] = ARRAY_SIZE(ocv_cap_tbl);
+ }
+
+ if (bi->temp_min == INT_MIN)
+ bi->temp_min = AB8500_TEMP_UNDER;
+ if (bi->temp_max == INT_MAX)
+ bi->temp_max = AB8500_TEMP_OVER;
+ if (bi->temp_alert_min == INT_MIN)
+ bi->temp_alert_min = AB8500_TEMP_LOW;
+ if (bi->temp_alert_max == INT_MAX)
+ bi->temp_alert_max = AB8500_TEMP_HIGH;
+ bm->temp_hysteresis = AB8500_TEMP_HYSTERESIS;
+
+ return 0;
+}
+
+void ab8500_bm_of_remove(struct power_supply *psy,
+ struct ab8500_bm_data *bm)
+{
+ power_supply_put_battery_info(psy, bm->bi);
+}