Merge tag 'for-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset updates from Sebastian Reichel:

 - core: simplify POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR handling

 - test-power: add POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR support

 - chrome EC drivers: add ID based probing

 - bq27xxx: simplify update loop to reduce I2C traffic

 - max8903 binding: fix GPIO polarity description

* tag 'for-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
  dt-bindings: power: supply: max8903: specify flt-gpios as input
  power: supply: bq27xxx: Move health reading out of update loop
  power: supply: bq27xxx: Move cycle count reading out of update loop
  power: supply: bq27xxx: Move energy reading out of update loop
  power: supply: bq27xxx: Move charge reading out of update loop
  power: supply: bq27xxx: Move time reading out of update loop
  power: supply: bq27xxx: Move temperature reading out of update loop
  power: supply: cros_pchg: provide ID table for avoiding fallback match
  power: supply: cros_usbpd: provide ID table for avoiding fallback match
  power: supply: core: simplify charge_behaviour formatting
  power: supply: test-power: implement charge_behaviour property

Documentation/devicetree/bindings/power/supply/maxim,max8903.yaml

@@ -34,7 +34,7 @@ properties:
 
   flt-gpios:
     maxItems: 1
-    description: Fault pin (active low, output)
+    description: Fault pin (active low, input)
 
   dcm-gpios:
     maxItems: 1

drivers/power/supply/bq27xxx_battery.c

@@ -1545,7 +1545,8 @@ static int bq27xxx_battery_read_soc(struct bq27xxx_device_info *di)
  * Return a battery charge value in µAh
  * Or < 0 if something fails.
  */
-static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
+static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg,
+				       union power_supply_propval *val)
 {
 	int charge;
 
@@ -1561,34 +1562,39 @@ static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
 	else
 		charge *= 1000;
 
-	return charge;
+	val->intval = charge;
+
+	return 0;
 }
 
 /*
  * Return the battery Nominal available capacity in µAh
  * Or < 0 if something fails.
  */
-static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
+static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di,
+					   union power_supply_propval *val)
 {
-	return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
+	return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC, val);
 }
 
 /*
  * Return the battery Remaining Capacity in µAh
  * Or < 0 if something fails.
  */
-static inline int bq27xxx_battery_read_rc(struct bq27xxx_device_info *di)
+static inline int bq27xxx_battery_read_rc(struct bq27xxx_device_info *di,
+					  union power_supply_propval *val)
 {
-	return bq27xxx_battery_read_charge(di, BQ27XXX_REG_RC);
+	return bq27xxx_battery_read_charge(di, BQ27XXX_REG_RC, val);
 }
 
 /*
  * Return the battery Full Charge Capacity in µAh
  * Or < 0 if something fails.
  */
-static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di)
+static inline int bq27xxx_battery_read_fcc(struct bq27xxx_device_info *di,
+					   union power_supply_propval *val)
 {
-	return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC);
+	return bq27xxx_battery_read_charge(di, BQ27XXX_REG_FCC, val);
 }
 
 /*
@@ -1633,7 +1639,8 @@ static int bq27xxx_battery_read_dcap(struct bq27xxx_device_info *di,
  * Return the battery Available energy in µWh
  * Or < 0 if something fails.
  */
-static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
+static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di,
+				       union power_supply_propval *val)
 {
 	int ae;
 
@@ -1648,14 +1655,17 @@ static int bq27xxx_battery_read_energy(struct bq27xxx_device_info *di)
 	else
 		ae *= 1000;
 
-	return ae;
+	val->intval = ae;
+
+	return 0;
 }
 
 /*
- * Return the battery temperature in tenths of degree Kelvin
+ * Return the battery temperature in tenths of degree Celsius
  * Or < 0 if something fails.
  */
-static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
+static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di,
+					    union power_supply_propval *val)
 {
 	int temp;
 
@@ -1668,14 +1678,20 @@ static int bq27xxx_battery_read_temperature(struct bq27xxx_device_info *di)
 	if (di->opts & BQ27XXX_O_ZERO)
 		temp = 5 * temp / 2;
 
-	return temp;
+	/* Convert decidegree Kelvin to Celsius */
+	temp -= 2731;
+
+	val->intval = temp;
+
+	return 0;
 }
 
 /*
  * Return the battery Cycle count total
  * Or < 0 if something fails.
  */
-static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
+static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di,
+				     union power_supply_propval *val)
 {
 	int cyct;
 
@@ -1683,14 +1699,17 @@ static int bq27xxx_battery_read_cyct(struct bq27xxx_device_info *di)
 	if (cyct < 0)
 		dev_err(di->dev, "error reading cycle count total\n");
 
-	return cyct;
+	val->intval = cyct;
+
+	return 0;
 }
 
 /*
  * Read a time register.
  * Return < 0 if something fails.
  */
-static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
+static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg,
+				     union power_supply_propval *val)
 {
 	int tval;
 
@@ -1704,7 +1723,9 @@ static int bq27xxx_battery_read_time(struct bq27xxx_device_info *di, u8 reg)
 	if (tval == 65535)
 		return -ENODATA;
 
-	return tval * 60;
+	val->intval = tval * 60;
+
+	return 0;
 }
 
 /*
@@ -1756,19 +1777,26 @@ static bool bq27xxx_battery_capacity_inaccurate(struct bq27xxx_device_info *di,
 		return false;
 }
 
-static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
+static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di,
+				       union power_supply_propval *val)
 {
+	int health;
+
 	/* Unlikely but important to return first */
 	if (unlikely(bq27xxx_battery_overtemp(di, di->cache.flags)))
-		return POWER_SUPPLY_HEALTH_OVERHEAT;
-	if (unlikely(bq27xxx_battery_undertemp(di, di->cache.flags)))
-		return POWER_SUPPLY_HEALTH_COLD;
-	if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
-		return POWER_SUPPLY_HEALTH_DEAD;
-	if (unlikely(bq27xxx_battery_capacity_inaccurate(di, di->cache.flags)))
-		return POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
-
-	return POWER_SUPPLY_HEALTH_GOOD;
+		health = POWER_SUPPLY_HEALTH_OVERHEAT;
+	else if (unlikely(bq27xxx_battery_undertemp(di, di->cache.flags)))
+		health = POWER_SUPPLY_HEALTH_COLD;
+	else if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
+		health = POWER_SUPPLY_HEALTH_DEAD;
+	else if (unlikely(bq27xxx_battery_capacity_inaccurate(di, di->cache.flags)))
+		health = POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
+	else
+		health = POWER_SUPPLY_HEALTH_GOOD;
+
+	val->intval = health;
+
+	return 0;
 }
 
 static bool bq27xxx_battery_is_full(struct bq27xxx_device_info *di, int flags)
@@ -1851,22 +1879,8 @@ static void bq27xxx_battery_update_unlocked(struct bq27xxx_device_info *di)
 	if ((cache.flags & 0xff) == 0xff)
 		cache.flags = -1; /* read error */
 	if (cache.flags >= 0) {
-		cache.temperature = bq27xxx_battery_read_temperature(di);
-		if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
-			cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
-		if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
-			cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
-		if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
-			cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
-
-		cache.charge_full = bq27xxx_battery_read_fcc(di);
 		cache.capacity = bq27xxx_battery_read_soc(di);
-		if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
-			cache.energy = bq27xxx_battery_read_energy(di);
 		di->cache.flags = cache.flags;
-		cache.health = bq27xxx_battery_read_health(di);
-		if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
-			cache.cycle_count = bq27xxx_battery_read_cyct(di);
 
 		/*
 		 * On gauges with signed current reporting the current must be
@@ -2038,18 +2052,16 @@ static int bq27xxx_battery_get_property(struct power_supply *psy,
 		ret = bq27xxx_battery_capacity_level(di, val);
 		break;
 	case POWER_SUPPLY_PROP_TEMP:
-		ret = bq27xxx_simple_value(di->cache.temperature, val);
-		if (ret == 0)
-			val->intval -= 2731; /* convert decidegree k to c */
+		ret = bq27xxx_battery_read_temperature(di, val);
 		break;
 	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
-		ret = bq27xxx_simple_value(di->cache.time_to_empty, val);
+		ret = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE, val);
 		break;
 	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
-		ret = bq27xxx_simple_value(di->cache.time_to_empty_avg, val);
+		ret = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP, val);
 		break;
 	case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
-		ret = bq27xxx_simple_value(di->cache.time_to_full, val);
+		ret = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF, val);
 		break;
 	case POWER_SUPPLY_PROP_TECHNOLOGY:
 		if (di->opts & BQ27XXX_O_MUL_CHEM)
@@ -2059,12 +2071,12 @@ static int bq27xxx_battery_get_property(struct power_supply *psy,
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_NOW:
 		if (di->regs[BQ27XXX_REG_NAC] != INVALID_REG_ADDR)
-			ret = bq27xxx_simple_value(bq27xxx_battery_read_nac(di), val);
+			ret = bq27xxx_battery_read_nac(di, val);
 		else
-			ret = bq27xxx_simple_value(bq27xxx_battery_read_rc(di), val);
+			ret = bq27xxx_battery_read_rc(di, val);
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_FULL:
-		ret = bq27xxx_simple_value(di->cache.charge_full, val);
+		ret = bq27xxx_battery_read_fcc(di, val);
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 		ret = bq27xxx_battery_read_dcap(di, val);
@@ -2077,16 +2089,16 @@ static int bq27xxx_battery_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
 		return -EINVAL;
 	case POWER_SUPPLY_PROP_CYCLE_COUNT:
-		ret = bq27xxx_simple_value(di->cache.cycle_count, val);
+		ret = bq27xxx_battery_read_cyct(di, val);
 		break;
 	case POWER_SUPPLY_PROP_ENERGY_NOW:
-		ret = bq27xxx_simple_value(di->cache.energy, val);
+		ret = bq27xxx_battery_read_energy(di, val);
 		break;
 	case POWER_SUPPLY_PROP_POWER_AVG:
 		ret = bq27xxx_battery_pwr_avg(di, val);
 		break;
 	case POWER_SUPPLY_PROP_HEALTH:
-		ret = bq27xxx_simple_value(di->cache.health, val);
+		ret = bq27xxx_battery_read_health(di, val);
 		break;
 	case POWER_SUPPLY_PROP_MANUFACTURER:
 		val->strval = BQ27XXX_MANUFACTURER;

drivers/power/supply/cros_peripheral_charger.c

@@ -5,6 +5,7 @@
  * Copyright 2020 Google LLC.
  */
 
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/notifier.h>
 #include <linux/platform_data/cros_ec_commands.h>
@@ -367,16 +368,22 @@ static int __maybe_unused cros_pchg_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(cros_pchg_pm_ops, NULL, cros_pchg_resume);
 
+static const struct platform_device_id cros_pchg_id[] = {
+	{ DRV_NAME, 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(platform, cros_pchg_id);
+
 static struct platform_driver cros_pchg_driver = {
 	.driver = {
 		.name = DRV_NAME,
 		.pm = &cros_pchg_pm_ops,
 	},
-	.probe = cros_pchg_probe
+	.probe = cros_pchg_probe,
+	.id_table = cros_pchg_id,
 };
 
 module_platform_driver(cros_pchg_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("ChromeOS EC peripheral device charger");
-MODULE_ALIAS("platform:" DRV_NAME);

drivers/power/supply/cros_usbpd-charger.c

@@ -5,6 +5,7 @@
  * Copyright (c) 2014 - 2018 Google, Inc
  */
 
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/platform_data/cros_ec_commands.h>
 #include <linux/platform_data/cros_ec_proto.h>
@@ -711,16 +712,22 @@ static int cros_usbpd_charger_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(cros_usbpd_charger_pm_ops, NULL,
 			 cros_usbpd_charger_resume);
 
+static const struct platform_device_id cros_usbpd_charger_id[] = {
+	{ DRV_NAME, 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(platform, cros_usbpd_charger_id);
+
 static struct platform_driver cros_usbpd_charger_driver = {
 	.driver = {
 		.name = DRV_NAME,
 		.pm = &cros_usbpd_charger_pm_ops,
 	},
-	.probe = cros_usbpd_charger_probe
+	.probe = cros_usbpd_charger_probe,
+	.id_table = cros_usbpd_charger_id,
 };
 
 module_platform_driver(cros_usbpd_charger_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("ChromeOS EC USBPD charger");
-MODULE_ALIAS("platform:" DRV_NAME);

drivers/power/supply/power_supply_sysfs.c

@@ -271,23 +271,6 @@ static ssize_t power_supply_show_usb_type(struct device *dev,
 	return count;
 }
 
-static ssize_t power_supply_show_charge_behaviour(struct device *dev,
-						  struct power_supply *psy,
-						  union power_supply_propval *value,
-						  char *buf)
-{
-	int ret;
-
-	ret = power_supply_get_property(psy,
-					POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR,
-					value);
-	if (ret < 0)
-		return ret;
-
-	return power_supply_charge_behaviour_show(dev, psy->desc->charge_behaviours,
-						  value->intval, buf);
-}
-
 static ssize_t power_supply_show_property(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf) {
@@ -321,7 +304,8 @@ static ssize_t power_supply_show_property(struct device *dev,
 						&value, buf);
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
-		ret = power_supply_show_charge_behaviour(dev, psy, &value, buf);
+		ret = power_supply_charge_behaviour_show(dev, psy->desc->charge_behaviours,
+							 value.intval, buf);
 		break;
 	case POWER_SUPPLY_PROP_MODEL_NAME ... POWER_SUPPLY_PROP_SERIAL_NUMBER:
 		ret = sysfs_emit(buf, "%s\n", value.strval);

drivers/power/supply/test_power.c

@@ -35,6 +35,8 @@ static int battery_capacity		= 50;
 static int battery_voltage		= 3300;
 static int battery_charge_counter	= -1000;
 static int battery_current		= -1600;
+static enum power_supply_charge_behaviour battery_charge_behaviour =
+	POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO;
 
 static bool module_initialized;
 
@@ -123,6 +125,9 @@ static int test_power_get_battery_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_CURRENT_NOW:
 		val->intval = battery_current;
 		break;
+	case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
+		val->intval = battery_charge_behaviour;
+		break;
 	default:
 		pr_info("%s: some properties deliberately report errors.\n",
 			__func__);
@@ -131,6 +136,31 @@ static int test_power_get_battery_property(struct power_supply *psy,
 	return 0;
 }
 
+static int test_power_battery_property_is_writeable(struct power_supply *psy,
+						    enum power_supply_property psp)
+{
+	return psp == POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR;
+}
+
+static int test_power_set_battery_property(struct power_supply *psy,
+					   enum power_supply_property psp,
+					   const union power_supply_propval *val)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
+		if (val->intval < 0 ||
+		    val->intval >= BITS_PER_TYPE(typeof(psy->desc->charge_behaviours)) ||
+		    !(BIT(val->intval) & psy->desc->charge_behaviours)) {
+			return -EINVAL;
+		}
+		battery_charge_behaviour = val->intval;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
 static enum power_supply_property test_power_ac_props[] = {
 	POWER_SUPPLY_PROP_ONLINE,
 };
@@ -156,6 +186,7 @@ static enum power_supply_property test_power_battery_props[] = {
 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
 	POWER_SUPPLY_PROP_CURRENT_AVG,
 	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR,
 };
 
 static char *test_power_ac_supplied_to[] = {
@@ -178,6 +209,11 @@ static const struct power_supply_desc test_power_desc[] = {
 		.properties = test_power_battery_props,
 		.num_properties = ARRAY_SIZE(test_power_battery_props),
 		.get_property = test_power_get_battery_property,
+		.set_property = test_power_set_battery_property,
+		.property_is_writeable = test_power_battery_property_is_writeable,
+		.charge_behaviours = BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO)
+				   | BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE)
+				   | BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE),
 	},
 	[TEST_USB] = {
 		.name = "test_usb",

include/linux/power/bq27xxx_battery.h

@@ -47,16 +47,8 @@ struct bq27xxx_access_methods {
 };
 
 struct bq27xxx_reg_cache {
-	int temperature;
-	int time_to_empty;
-	int time_to_empty_avg;
-	int time_to_full;
-	int charge_full;
-	int cycle_count;
 	int capacity;
-	int energy;
 	int flags;
-	int health;
 };
 
 struct bq27xxx_device_info {