linux-kernel - [RFC PATCH 1/1] power: supply: bq27xxx: Call power_supply

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Date:   Wed, 28 Feb 2018 02:04:44 +0100
From:   Merlijn Wajer <merlijn@...zup.org>
To:     linux-omap@...r.kernel.org
Cc:     merlijn@...zup.org,
        Pali Rohár <pali.rohar@...il.com>,
        "Andrew F. Davis" <afd@...com>, Sebastian Reichel <sre@...nel.org>,
        Liam Breck <kernel@...workimprov.net>,
        Matt Ranostay <matt.ranostay@...sulko.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 1/1] power: supply: bq27xxx: Call power_supply_changed on status change

Signed-off-by: Merlijn Wajer <merlijn@...zup.org>
---
 drivers/power/supply/bq27xxx_battery.c | 59 +++++++++++++++++-----------------
 include/linux/power/bq27xxx_battery.h  |  1 +
 2 files changed, 30 insertions(+), 30 deletions(-)

diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index 0a203672744c..218d153fb431 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -1527,6 +1527,31 @@ static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
 	return POWER_SUPPLY_HEALTH_GOOD;
 }
 
+static int bq27xxx_battery_read_status(struct bq27xxx_device_info *di)
+{
+	int status;
+
+	if (di->opts & BQ27XXX_O_ZERO) {
+		if (di->cache.flags & BQ27000_FLAG_FC)
+			status = POWER_SUPPLY_STATUS_FULL;
+		else if (di->cache.flags & BQ27000_FLAG_CHGS)
+			status = POWER_SUPPLY_STATUS_CHARGING;
+		else if (power_supply_am_i_supplied(di->bat) > 0)
+			status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		else
+			status = POWER_SUPPLY_STATUS_DISCHARGING;
+	} else {
+		if (di->cache.flags & BQ27XXX_FLAG_FC)
+			status = POWER_SUPPLY_STATUS_FULL;
+		else if (di->cache.flags & BQ27XXX_FLAG_DSC)
+			status = POWER_SUPPLY_STATUS_DISCHARGING;
+		else
+			status = POWER_SUPPLY_STATUS_CHARGING;
+	}
+
+	return status;
+}
+
 void bq27xxx_battery_update(struct bq27xxx_device_info *di)
 {
 	struct bq27xxx_reg_cache cache = {0, };
@@ -1547,6 +1572,7 @@ void bq27xxx_battery_update(struct bq27xxx_device_info *di)
 			cache.time_to_full = -ENODATA;
 			cache.charge_full = -ENODATA;
 			cache.health = -ENODATA;
+			cache.status = bq27xxx_battery_read_status(di);
 		} else {
 			if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
 				cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
@@ -1559,6 +1585,7 @@ void bq27xxx_battery_update(struct bq27xxx_device_info *di)
 			if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
 				cache.energy = bq27xxx_battery_read_energy(di);
 			cache.health = bq27xxx_battery_read_health(di);
+			cache.status = bq27xxx_battery_read_status(di);
 		}
 		if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
 			cache.cycle_count = bq27xxx_battery_read_cyct(di);
@@ -1570,7 +1597,7 @@ void bq27xxx_battery_update(struct bq27xxx_device_info *di)
 			di->charge_design_full = bq27xxx_battery_read_dcap(di);
 	}
 
-	if (di->cache.capacity != cache.capacity)
+	if ((di->cache.capacity != cache.capacity) || (di->cache.status != cache.status))
 		power_supply_changed(di->bat);
 
 	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
@@ -1625,34 +1652,6 @@ static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
 	return 0;
 }
 
-static int bq27xxx_battery_status(struct bq27xxx_device_info *di,
-				  union power_supply_propval *val)
-{
-	int status;
-
-	if (di->opts & BQ27XXX_O_ZERO) {
-		if (di->cache.flags & BQ27000_FLAG_FC)
-			status = POWER_SUPPLY_STATUS_FULL;
-		else if (di->cache.flags & BQ27000_FLAG_CHGS)
-			status = POWER_SUPPLY_STATUS_CHARGING;
-		else if (power_supply_am_i_supplied(di->bat) > 0)
-			status = POWER_SUPPLY_STATUS_NOT_CHARGING;
-		else
-			status = POWER_SUPPLY_STATUS_DISCHARGING;
-	} else {
-		if (di->cache.flags & BQ27XXX_FLAG_FC)
-			status = POWER_SUPPLY_STATUS_FULL;
-		else if (di->cache.flags & BQ27XXX_FLAG_DSC)
-			status = POWER_SUPPLY_STATUS_DISCHARGING;
-		else
-			status = POWER_SUPPLY_STATUS_CHARGING;
-	}
-
-	val->intval = status;
-
-	return 0;
-}
-
 static int bq27xxx_battery_capacity_level(struct bq27xxx_device_info *di,
 					  union power_supply_propval *val)
 {
@@ -1733,7 +1732,7 @@ static int bq27xxx_battery_get_property(struct power_supply *psy,
 
 	switch (psp) {
 	case POWER_SUPPLY_PROP_STATUS:
-		ret = bq27xxx_battery_status(di, val);
+		ret = bq27xxx_simple_value(di->cache.status, val);
 		break;
 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 		ret = bq27xxx_battery_voltage(di, val);
diff --git a/include/linux/power/bq27xxx_battery.h b/include/linux/power/bq27xxx_battery.h
index e6187f524f2c..4f27656045fd 100644
--- a/include/linux/power/bq27xxx_battery.h
+++ b/include/linux/power/bq27xxx_battery.h
@@ -49,6 +49,7 @@ struct bq27xxx_reg_cache {
 	int flags;
 	int power_avg;
 	int health;
+	int status;
 };
 
 struct bq27xxx_device_info {
-- 
2.16.2