linux-kernel - [PATCH 2/7] mfd: lp8788: Use devm_mfd_add_devices and devm_regmap_add_irq

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Date:	Thu, 21 Apr 2016 17:55:53 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<lee.jones@...aro.org>, <milo.kim@...com>, <cw00.choi@...sung.com>,
	<k.kozlowski@...sung.com>
CC:	<sbkim73@...sung.com>, <tony@...mide.com>,
	<linux-kernel@...r.kernel.org>,
	<linux-samsung-soc@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH 2/7] mfd: lp8788: Use devm_mfd_add_devices and devm_regmap_add_irq_chip

Use devm_mfd_add_devices() for adding MFD child devices and
devm_regmap_add_irq_chip() for IRQ chip registration.

This reduces the error code path and .remove callback for removing
MFD child devices and deleting IRQ chip data.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
CC: Milo Kim <milo.kim@...com>
---
 drivers/mfd/lp8788-irq.c | 12 +++---------
 drivers/mfd/lp8788.c     | 10 ----------
 2 files changed, 3 insertions(+), 19 deletions(-)

diff --git a/drivers/mfd/lp8788-irq.c b/drivers/mfd/lp8788-irq.c
index 792d51b..aacd39f 100644
--- a/drivers/mfd/lp8788-irq.c
+++ b/drivers/mfd/lp8788-irq.c
@@ -175,9 +175,9 @@ int lp8788_irq_init(struct lp8788 *lp, int irq)
 	lp->irqdm = irqd->domain;
 	mutex_init(&irqd->irq_lock);
 
-	ret = request_threaded_irq(irq, NULL, lp8788_irq_handler,
-				IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-				"lp8788-irq", irqd);
+	ret = devm_request_threaded_irq(lp->dev, irq, NULL, lp8788_irq_handler,
+					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					"lp8788-irq", irqd);
 	if (ret) {
 		dev_err(lp->dev, "failed to create a thread for IRQ_N\n");
 		return ret;
@@ -187,9 +187,3 @@ int lp8788_irq_init(struct lp8788 *lp, int irq)
 
 	return 0;
 }
-
-void lp8788_irq_exit(struct lp8788 *lp)
-{
-	if (lp->irq)
-		free_irq(lp->irq, lp->irqdm);
-}
diff --git a/drivers/mfd/lp8788.c b/drivers/mfd/lp8788.c
index acf6165..37fea46 100644
--- a/drivers/mfd/lp8788.c
+++ b/drivers/mfd/lp8788.c
@@ -203,15 +203,6 @@ static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 			       ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
 }
 
-static int lp8788_remove(struct i2c_client *cl)
-{
-	struct lp8788 *lp = i2c_get_clientdata(cl);
-
-	mfd_remove_devices(lp->dev);
-	lp8788_irq_exit(lp);
-	return 0;
-}
-
 static const struct i2c_device_id lp8788_ids[] = {
 	{"lp8788", 0},
 	{ }
@@ -223,7 +214,6 @@ static struct i2c_driver lp8788_driver = {
 		.name = "lp8788",
 	},
 	.probe = lp8788_probe,
-	.remove = lp8788_remove,
 	.id_table = lp8788_ids,
 };
 
-- 
2.1.4