linux-kernel - [PATCH] extcon: max77843: Clear IRQ bits state before request IRQ

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Date:	Fri, 05 Jun 2015 13:32:27 +0900
From:	Jaewon Kim <jaewon02.kim@...sung.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>
Cc:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	Jaewon Kim <jaewon02.kim@...sung.com>
Subject: [PATCH] extcon: max77843: Clear IRQ bits state before request IRQ

IRQ signal before driver probe is needless because driver sends
current state after platform booting done.
So, this patch clears MUIC IRQ bits before request IRQ.

Signed-off-by: Jaewon Kim <jaewon02.kim@...sung.com>
---
 drivers/extcon/extcon-max77843.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/extcon/extcon-max77843.c b/drivers/extcon/extcon-max77843.c
index d78a64d..11e09d1 100644
--- a/drivers/extcon/extcon-max77843.c
+++ b/drivers/extcon/extcon-max77843.c
@@ -781,6 +781,15 @@ static int max77843_muic_probe(struct platform_device *pdev)
 	/* Support virtual irq domain for max77843 MUIC device */
 	INIT_WORK(&info->irq_work, max77843_muic_irq_work);
 
+	/* Clear IRQ bits before request IRQs */
+	ret = regmap_bulk_read(max77843->regmap_muic,
+			MAX77843_MUIC_REG_INT1, info->status,
+			MAX77843_MUIC_IRQ_NUM);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
+		goto err_muic_irq;
+	}
+
 	for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
 		struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
 		unsigned int virq = 0;
-- 
1.7.9.5

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