power: supply: sc27xx: Optimize the battery resistance with measuring temperature (6af82888) · Commits · 戴 / test

drivers/power/supply/sc27xx_fuel_gauge.c

+30 −2

Original line number	Diff line number	Diff line
		@@ -81,9 +81,11 @@
		* @max_volt: the maximum constant input voltage in millivolt
		* @min_volt: the minimum drained battery voltage in microvolt
		* @table_len: the capacity table length
		* @resist_table_len: the resistance table length
		* @cur_1000ma_adc: ADC value corresponding to 1000 mA
		* @vol_1000mv_adc: ADC value corresponding to 1000 mV
		* @cap_table: capacity table with corresponding ocv
		* @resist_table: resistance percent table with corresponding temperature
		*/
		struct sc27xx_fgu_data {
		struct regmap *regmap;
		@@ -103,15 +105,18 @@ struct sc27xx_fgu_data {
		int max_volt;
		int min_volt;
		int table_len;
		int resist_table_len;
		int cur_1000ma_adc;
		int vol_1000mv_adc;
		struct power_supply_battery_ocv_table *cap_table;
		struct power_supply_resistance_temp_table *resist_table;
		};

		static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int capacity);
		static void sc27xx_fgu_capacity_calibration(struct sc27xx_fgu_data *data,
		int cap, bool int_mode);
		static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap);
		static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data data, int temp);

		static const char * const sc27xx_charger_supply_name[] = {
		"sc2731_charger",
		@@ -434,7 +439,7 @@ static int sc27xx_fgu_get_current(struct sc27xx_fgu_data data, int val)

		static int sc27xx_fgu_get_vbat_ocv(struct sc27xx_fgu_data data, int val)
		{
		int vol, cur, ret;
		int vol, cur, ret, temp, resistance;

		ret = sc27xx_fgu_get_vbat_vol(data, &vol);
		if (ret)
		@@ -444,8 +449,19 @@ static int sc27xx_fgu_get_vbat_ocv(struct sc27xx_fgu_data data, int val)
		if (ret)
		return ret;

		resistance = data->internal_resist;
		if (data->resist_table_len > 0) {
		ret = sc27xx_fgu_get_temp(data, &temp);
		if (ret)
		return ret;

		resistance = power_supply_temp2resist_simple(data->resist_table,
		data->resist_table_len, temp);
		resistance = data->internal_resist * resistance / 100;
		}

		/* Return the battery OCV in micro volts. */
		val = vol 1000 - cur * data->internal_resist;
		val = vol 1000 - cur * resistance;

		return 0;
		}
		@@ -929,6 +945,18 @@ static int sc27xx_fgu_hw_init(struct sc27xx_fgu_data *data)
		if (!data->alarm_cap)
		data->alarm_cap += 1;

		data->resist_table_len = info.resist_table_size;
		if (data->resist_table_len > 0) {
		data->resist_table = devm_kmemdup(data->dev, info.resist_table,
		data->resist_table_len *
		sizeof(struct power_supply_resistance_temp_table),
		GFP_KERNEL);
		if (!data->resist_table) {
		power_supply_put_battery_info(data->battery, &info);
		return -ENOMEM;
		}
		}

		power_supply_put_battery_info(data->battery, &info);

		ret = sc27xx_fgu_calibration(data);

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