linux-kernel - [PATCH v1 2/4] power: max17040: add simple battery cell support

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Date:   Wed,  8 Mar 2023 10:44:17 +0200
From:   Svyatoslav Ryhel <clamor95@...il.com>
To:     Iskren Chernev <me@...ren.info>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Matheus Castello <matheus@...tello.eng.br>,
        Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Svyatoslav Ryhel <clamor95@...il.com>
Cc:     linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/4] power: max17040: add simple battery cell support

Simple battery cell allows to pass some constant data
about battery controlled by this fuel gauge.

Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
---
 drivers/power/supply/max17040_battery.c | 34 +++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
index d1075959dd46..2778ed5b5c14 100644
--- a/drivers/power/supply/max17040_battery.c
+++ b/drivers/power/supply/max17040_battery.c
@@ -141,6 +141,7 @@ struct max17040_chip {
 	struct regmap			*regmap;
 	struct delayed_work		work;
 	struct power_supply		*battery;
+	struct power_supply_battery_info	*batt_info;
 	struct chip_data		data;
 
 	/* battery capacity */
@@ -400,6 +401,28 @@ static int max17040_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
 		val->intval = chip->low_soc_alert;
 		break;
+
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		val->intval = chip->batt_info->technology;
+		break;
+	case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
+		val->intval = chip->batt_info->energy_full_design_uwh;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+		val->intval = chip->batt_info->charge_full_design_uah;
+		break;
+	case POWER_SUPPLY_PROP_TEMP_MIN:
+		if (chip->batt_info->temp_min == INT_MIN)
+			return -ENODATA;
+
+		val->intval = chip->batt_info->temp_min * 10;
+		break;
+	case POWER_SUPPLY_PROP_TEMP_MAX:
+		if (chip->batt_info->temp_max == INT_MAX)
+			return -ENODATA;
+
+		val->intval = chip->batt_info->temp_max * 10;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -418,6 +441,11 @@ static enum power_supply_property max17040_battery_props[] = {
 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
 	POWER_SUPPLY_PROP_CAPACITY,
 	POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
+	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+	POWER_SUPPLY_PROP_TEMP_MIN,
+	POWER_SUPPLY_PROP_TEMP_MAX,
 };
 
 static const struct power_supply_desc max17040_battery_desc = {
@@ -470,6 +498,12 @@ static int max17040_probe(struct i2c_client *client)
 		return PTR_ERR(chip->battery);
 	}
 
+	if (client->dev.of_node) {
+		if (power_supply_get_battery_info(chip->battery, &chip->batt_info))
+			dev_warn(&client->dev,
+				 "No monitored battery, some properties will be missing\n");
+	}
+
 	ret = max17040_get_version(chip);
 	if (ret < 0)
 		return ret;
-- 
2.37.2