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 000000000..3e6ea2237
--- /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);
+}