diff options
Diffstat (limited to 'drivers/power/supply/power_supply_core.c')
-rw-r--r-- | drivers/power/supply/power_supply_core.c | 80 |
1 files changed, 48 insertions, 32 deletions
diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c index 6093754cebd5..ec838c9bcc0a 100644 --- a/drivers/power/supply/power_supply_core.c +++ b/drivers/power/supply/power_supply_core.c @@ -21,6 +21,7 @@ #include <linux/power_supply.h> #include <linux/property.h> #include <linux/thermal.h> +#include <linux/fixp-arith.h> #include "power_supply.h" /* exported for the APM Power driver, APM emulation */ @@ -563,14 +564,19 @@ EXPORT_SYMBOL_GPL(devm_power_supply_get_by_phandle); #endif /* CONFIG_OF */ int power_supply_get_battery_info(struct power_supply *psy, - struct power_supply_battery_info *info) + struct power_supply_battery_info **info_out) { struct power_supply_resistance_temp_table *resist_table; + struct power_supply_battery_info *info; struct device_node *battery_np; const char *value; int err, len, index; const __be32 *list; + info = devm_kmalloc(&psy->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + info->technology = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; info->energy_full_design_uwh = -EINVAL; info->charge_full_design_uah = -EINVAL; @@ -580,6 +586,10 @@ int power_supply_get_battery_info(struct power_supply *psy, info->charge_term_current_ua = -EINVAL; info->constant_charge_current_max_ua = -EINVAL; info->constant_charge_voltage_max_uv = -EINVAL; + info->tricklecharge_current_ua = -EINVAL; + info->precharge_voltage_max_uv = -EINVAL; + info->charge_restart_voltage_uv = -EINVAL; + info->overvoltage_limit_uv = -EINVAL; info->temp_ambient_alert_min = INT_MIN; info->temp_ambient_alert_max = INT_MAX; info->temp_alert_min = INT_MIN; @@ -727,7 +737,7 @@ int power_supply_get_battery_info(struct power_supply *psy, list = of_get_property(battery_np, "resistance-temp-table", &len); if (!list || !len) - goto out_put_node; + goto out_ret_pointer; info->resist_table_size = len / (2 * sizeof(__be32)); resist_table = info->resist_table = devm_kcalloc(&psy->dev, @@ -745,6 +755,10 @@ int power_supply_get_battery_info(struct power_supply *psy, resist_table[index].resistance = be32_to_cpu(*list++); } +out_ret_pointer: + /* Finally return the whole thing */ + *info_out = info; + out_put_node: of_node_put(battery_np); return err; @@ -763,6 +777,8 @@ void power_supply_put_battery_info(struct power_supply *psy, if (info->resist_table) devm_kfree(&psy->dev, info->resist_table); + + devm_kfree(&psy->dev, info); } EXPORT_SYMBOL_GPL(power_supply_put_battery_info); @@ -783,26 +799,25 @@ EXPORT_SYMBOL_GPL(power_supply_put_battery_info); int power_supply_temp2resist_simple(struct power_supply_resistance_temp_table *table, int table_len, int temp) { - int i, resist; + int i, high, low; - for (i = 0; i < table_len; i++) + /* Break loop at table_len - 1 because that is the highest index */ + for (i = 0; i < table_len - 1; i++) if (temp > table[i].temp) break; - if (i > 0 && i < table_len) { - int tmp; - - tmp = (table[i - 1].resistance - table[i].resistance) * - (temp - table[i].temp); - tmp /= table[i - 1].temp - table[i].temp; - resist = tmp + table[i].resistance; - } else if (i == 0) { - resist = table[0].resistance; - } else { - resist = table[table_len - 1].resistance; - } - - return resist; + /* The library function will deal with high == low */ + if ((i == 0) || (i == (table_len - 1))) + high = i; + else + high = i - 1; + low = i; + + return fixp_linear_interpolate(table[low].temp, + table[low].resistance, + table[high].temp, + table[high].resistance, + temp); } EXPORT_SYMBOL_GPL(power_supply_temp2resist_simple); @@ -821,24 +836,25 @@ EXPORT_SYMBOL_GPL(power_supply_temp2resist_simple); int power_supply_ocv2cap_simple(struct power_supply_battery_ocv_table *table, int table_len, int ocv) { - int i, cap, tmp; + int i, high, low; - for (i = 0; i < table_len; i++) + /* Break loop at table_len - 1 because that is the highest index */ + for (i = 0; i < table_len - 1; i++) if (ocv > table[i].ocv) break; - if (i > 0 && i < table_len) { - tmp = (table[i - 1].capacity - table[i].capacity) * - (ocv - table[i].ocv); - tmp /= table[i - 1].ocv - table[i].ocv; - cap = tmp + table[i].capacity; - } else if (i == 0) { - cap = table[0].capacity; - } else { - cap = table[table_len - 1].capacity; - } - - return cap; + /* The library function will deal with high == low */ + if ((i == 0) || (i == (table_len - 1))) + high = i - 1; + else + high = i; /* i.e. i == 0 */ + low = i; + + return fixp_linear_interpolate(table[low].ocv, + table[low].capacity, + table[high].ocv, + table[high].capacity, + ocv); } EXPORT_SYMBOL_GPL(power_supply_ocv2cap_simple); |