linux-kernel - [PATCH] power: supply: core: Add psy_has

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Date:   Wed,  1 Sep 2021 16:59:36 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Sebastian Reichel <sre@...nel.org>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH] power: supply: core: Add psy_has_property()

Add the helper psy_has_property() to check whether a power supply
has a given property and use it instead of ad hoc iterations over
the property list in multiple locations.

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
---

 drivers/power/supply/power_supply_core.c | 65 ++++++++++++++----------
 1 file changed, 37 insertions(+), 28 deletions(-)

diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index d99e2f11c183..9309b33ed3ec 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -956,26 +956,41 @@ static struct thermal_zone_device_ops psy_tzd_ops = {
 	.get_temp = power_supply_read_temp,
 };
 
+static bool psy_has_property(const struct power_supply_desc *psy_desc,
+			     enum power_supply_property psp)
+{
+	bool found = false;
+	int i;
+
+	for (i = 0; i < psy_desc->num_properties; i++) {
+		if (psy_desc->properties[i] == psp) {
+			found = true;
+			break;
+		}
+	}
+
+	return found;
+}
+
 static int psy_register_thermal(struct power_supply *psy)
 {
-	int i, ret;
+	int ret;
 
 	if (psy->desc->no_thermal)
 		return 0;
 
 	/* Register battery zone device psy reports temperature */
-	for (i = 0; i < psy->desc->num_properties; i++) {
-		if (psy->desc->properties[i] == POWER_SUPPLY_PROP_TEMP) {
-			psy->tzd = thermal_zone_device_register(psy->desc->name,
-					0, 0, psy, &psy_tzd_ops, NULL, 0, 0);
-			if (IS_ERR(psy->tzd))
-				return PTR_ERR(psy->tzd);
-			ret = thermal_zone_device_enable(psy->tzd);
-			if (ret)
-				thermal_zone_device_unregister(psy->tzd);
-			return ret;
-		}
+	if (psy_has_property(psy->desc, POWER_SUPPLY_PROP_TEMP)) {
+		psy->tzd = thermal_zone_device_register(psy->desc->name,
+				0, 0, psy, &psy_tzd_ops, NULL, 0, 0);
+		if (IS_ERR(psy->tzd))
+			return PTR_ERR(psy->tzd);
+		ret = thermal_zone_device_enable(psy->tzd);
+		if (ret)
+			thermal_zone_device_unregister(psy->tzd);
+		return ret;
 	}
+
 	return 0;
 }
 
@@ -1046,18 +1061,14 @@ static const struct thermal_cooling_device_ops psy_tcd_ops = {
 
 static int psy_register_cooler(struct power_supply *psy)
 {
-	int i;
-
 	/* Register for cooling device if psy can control charging */
-	for (i = 0; i < psy->desc->num_properties; i++) {
-		if (psy->desc->properties[i] ==
-				POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT) {
-			psy->tcd = thermal_cooling_device_register(
-							(char *)psy->desc->name,
-							psy, &psy_tcd_ops);
-			return PTR_ERR_OR_ZERO(psy->tcd);
-		}
+	if (psy_has_property(psy->desc, POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT)) {
+		psy->tcd = thermal_cooling_device_register(
+			(char *)psy->desc->name,
+			psy, &psy_tcd_ops);
+		return PTR_ERR_OR_ZERO(psy->tcd);
 	}
+
 	return 0;
 }
 
@@ -1095,7 +1106,7 @@ __power_supply_register(struct device *parent,
 {
 	struct device *dev;
 	struct power_supply *psy;
-	int i, rc;
+	int rc;
 
 	if (!parent)
 		pr_warn("%s: Expected proper parent device for '%s'\n",
@@ -1104,11 +1115,9 @@ __power_supply_register(struct device *parent,
 	if (!desc || !desc->name || !desc->properties || !desc->num_properties)
 		return ERR_PTR(-EINVAL);
 
-	for (i = 0; i < desc->num_properties; ++i) {
-		if ((desc->properties[i] == POWER_SUPPLY_PROP_USB_TYPE) &&
-		    (!desc->usb_types || !desc->num_usb_types))
-			return ERR_PTR(-EINVAL);
-	}
+	if (psy_has_property(desc, POWER_SUPPLY_PROP_USB_TYPE) &&
+	    (!desc->usb_types || !desc->num_usb_types))
+		return ERR_PTR(-EINVAL);
 
 	psy = kzalloc(sizeof(*psy), GFP_KERNEL);
 	if (!psy)
-- 
2.33.0.153.gba50c8fa24-goog