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Date:   Fri, 14 Aug 2020 00:34:03 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        David Heidelberg <david@...t.cz>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "Bruce E . Robertson" <bruce.e.robertson@...el.com>
Cc:     linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Jonghwa Lee <jonghwa3.lee@...sung.com>,
        John Stultz <john.stultz@...aro.org>,
        Vinay Simha BN <simhavcs@...il.com>,
        linux-tegra@...r.kernel.org
Subject: [PATCH v3 04/10] power: supply: smb347-charger: Use resource-managed API

From: David Heidelberg <david@...t.cz>

Simplify code, more convenient to use with Device Tree.

Reviewed-by: Dmitry Osipenko <digetx@...il.com>
Signed-off-by: David Heidelberg <david@...t.cz>
---
 drivers/power/supply/smb347-charger.c | 75 +++++++++++----------------
 1 file changed, 29 insertions(+), 46 deletions(-)

diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c
index f99026d81f2a..60894105fcbd 100644
--- a/drivers/power/supply/smb347-charger.c
+++ b/drivers/power/supply/smb347-charger.c
@@ -836,21 +836,31 @@ static int smb347_irq_init(struct smb347_charger *smb,
 			   struct i2c_client *client)
 {
 	const struct smb347_charger_platform_data *pdata = smb->pdata;
-	int ret, irq = gpio_to_irq(pdata->irq_gpio);
+	unsigned long irqflags = IRQF_ONESHOT;
+	int ret;
 
-	ret = gpio_request_one(pdata->irq_gpio, GPIOF_IN, client->name);
-	if (ret < 0)
-		goto fail;
+	/* Requesting GPIO for IRQ is only needed in non-DT way */
+	if (!client->irq) {
+		int irq = gpio_to_irq(pdata->irq_gpio);
+
+		ret = devm_gpio_request_one(smb->dev, pdata->irq_gpio,
+					    GPIOF_IN, client->name);
+		if (ret < 0)
+			return ret;
+
+		irqflags |= IRQF_TRIGGER_FALLING;
+		client->irq = irq;
+	}
 
-	ret = request_threaded_irq(irq, NULL, smb347_interrupt,
-				   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-				   client->name, smb);
+	ret = devm_request_threaded_irq(smb->dev, client->irq, NULL,
+					smb347_interrupt, irqflags,
+					client->name, smb);
 	if (ret < 0)
-		goto fail_gpio;
+		return ret;
 
 	ret = smb347_set_writable(smb, true);
 	if (ret < 0)
-		goto fail_irq;
+		return ret;
 
 	/*
 	 * Configure the STAT output to be suitable for interrupts: disable
@@ -860,20 +870,10 @@ static int smb347_irq_init(struct smb347_charger *smb,
 				 CFG_STAT_ACTIVE_HIGH | CFG_STAT_DISABLED,
 				 CFG_STAT_DISABLED);
 	if (ret < 0)
-		goto fail_readonly;
+		client->irq = 0;
 
 	smb347_set_writable(smb, false);
-	client->irq = irq;
-	return 0;
 
-fail_readonly:
-	smb347_set_writable(smb, false);
-fail_irq:
-	free_irq(irq, smb);
-fail_gpio:
-	gpio_free(pdata->irq_gpio);
-fail:
-	client->irq = 0;
 	return ret;
 }
 
@@ -1251,32 +1251,24 @@ static int smb347_probe(struct i2c_client *client,
 	mains_usb_cfg.num_supplicants = ARRAY_SIZE(battery);
 	mains_usb_cfg.drv_data = smb;
 	if (smb->pdata->use_mains) {
-		smb->mains = power_supply_register(dev, &smb347_mains_desc,
-						   &mains_usb_cfg);
+		smb->mains = devm_power_supply_register(dev, &smb347_mains_desc,
+							&mains_usb_cfg);
 		if (IS_ERR(smb->mains))
 			return PTR_ERR(smb->mains);
 	}
 
 	if (smb->pdata->use_usb) {
-		smb->usb = power_supply_register(dev, &smb347_usb_desc,
-						 &mains_usb_cfg);
-		if (IS_ERR(smb->usb)) {
-			if (smb->pdata->use_mains)
-				power_supply_unregister(smb->mains);
+		smb->usb = devm_power_supply_register(dev, &smb347_usb_desc,
+						      &mains_usb_cfg);
+		if (IS_ERR(smb->usb))
 			return PTR_ERR(smb->usb);
-		}
 	}
 
 	battery_cfg.drv_data = smb;
-	smb->battery = power_supply_register(dev, &smb347_battery_desc,
-					     &battery_cfg);
-	if (IS_ERR(smb->battery)) {
-		if (smb->pdata->use_usb)
-			power_supply_unregister(smb->usb);
-		if (smb->pdata->use_mains)
-			power_supply_unregister(smb->mains);
+	smb->battery = devm_power_supply_register(dev, &smb347_battery_desc,
+						  &battery_cfg);
+	if (IS_ERR(smb->battery))
 		return PTR_ERR(smb->battery);
-	}
 
 	/*
 	 * Interrupt pin is optional. If it is connected, we setup the
@@ -1299,17 +1291,8 @@ static int smb347_remove(struct i2c_client *client)
 {
 	struct smb347_charger *smb = i2c_get_clientdata(client);
 
-	if (client->irq) {
+	if (client->irq)
 		smb347_irq_disable(smb);
-		free_irq(client->irq, smb);
-		gpio_free(smb->pdata->irq_gpio);
-	}
-
-	power_supply_unregister(smb->battery);
-	if (smb->pdata->use_usb)
-		power_supply_unregister(smb->usb);
-	if (smb->pdata->use_mains)
-		power_supply_unregister(smb->mains);
 	return 0;
 }
 
-- 
2.27.0

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