linux-kernel - [PATCH v3 2/2] power_supply: Use of-thermal cdev registration API

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Date:   Tue, 21 Dec 2021 00:16:28 +0530
From:   Manaf Meethalavalappu Pallikunhi <quic_manafm@...cinc.com>
To:     Sebastian Reichel <sre@...nel.org>
CC:     <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        David Collins <quic_collinsd@...cinc.com>,
        Subbaraman Narayanamurthy <quic_subbaram@...cinc.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        "thara . gopinath @ linaro . org" <thara.gopinath@...aro.org>,
        "Manaf Meethalavalappu Pallikunhi" <quic_manafm@...cinc.com>
Subject: [PATCH v3 2/2] power_supply: Use of-thermal cdev registration API

With thermal frameworks of-thermal interface, thermal zone parameters can
be defined in devicetree. This includes cooling device mitigation levels
for a thermal zone. To take advantage of this, cooling device should use
the thermal_of_cooling_device_register API to register a cooling device.

Use thermal_of_cooling_device_register API to register the power supply
cooling device. This enables power supply cooling device be included in the
thermal zone parameter in devicetree.

Signed-off-by: Manaf Meethalavalappu Pallikunhi <quic_manafm@...cinc.com>
---
 drivers/power/supply/power_supply_core.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index ea3e75e..800b8a3 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -132,7 +132,7 @@ void power_supply_changed(struct power_supply *psy)
 }
 EXPORT_SYMBOL_GPL(power_supply_changed);
 
-static int psy_register_cooler(struct power_supply *psy);
+static int psy_register_cooler(struct device *dev, struct power_supply *psy);
 /*
  * Notify that power supply was registered after parent finished the probing.
  *
@@ -159,7 +159,7 @@ static void power_supply_deferred_register_work(struct work_struct *work)
 	}
 
 	power_supply_changed(psy);
-	psy_register_cooler(psy);
+	psy_register_cooler(psy->dev.parent, psy);
 
 	if (psy->dev.parent)
 		mutex_unlock(&psy->dev.parent->mutex);
@@ -1145,7 +1145,7 @@ static const struct thermal_cooling_device_ops psy_tcd_ops = {
 	.set_cur_state = ps_set_cur_charge_cntl_limit,
 };
 
-static int psy_register_cooler(struct power_supply *psy)
+static int psy_register_cooler(struct device *dev, struct power_supply *psy)
 {
 	int i;
 
@@ -1153,7 +1153,13 @@ static int psy_register_cooler(struct power_supply *psy)
 	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(
+			if (dev)
+				psy->tcd = thermal_of_cooling_device_register(
+							dev_of_node(dev),
+							(char *)psy->desc->name,
+							psy, &psy_tcd_ops);
+			else
+				psy->tcd = thermal_cooling_device_register(
 							(char *)psy->desc->name,
 							psy, &psy_tcd_ops);
 			return PTR_ERR_OR_ZERO(psy->tcd);
@@ -1178,7 +1184,7 @@ static void psy_unregister_thermal(struct power_supply *psy)
 {
 }
 
-static int psy_register_cooler(struct power_supply *psy)
+static int psy_register_cooler(struct device *dev, struct power_supply *psy)
 {
 	return 0;
 }