linux-kernel - [PATCH V2] rtc: bbnsm: add remove hook

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Message-Id: <20241104031512.3474790-1-peng.fan@oss.nxp.com>
Date: Mon,  4 Nov 2024 11:15:12 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Jacky Bai <ping.bai@....com>,
	Peng Fan <peng.fan@....com>,
	linux-rtc@...r.kernel.org (open list:REAL TIME CLOCK (RTC) SUBSYSTEM),
	linux-kernel@...r.kernel.org (open list)
Cc: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH V2] rtc: bbnsm: add remove hook

From: Peng Fan <peng.fan@....com>

Without remove hook to clear wake irq, there will be kernel dump when
doing module test.
"bbnsm_rtc 44440000.bbnsm:rtc: wake irq already initialized"

Add remove hook to clear wake irq and set wakeup to false.

Fixes: eb7b85853c38 ("rtc: bbnsm: Add the bbnsm rtc support")
Cc: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Peng Fan <peng.fan@....com>
---

V2:
 Per Christophe JAILLET
  Use remove, not remove_new
  Fix error handling in probe

 drivers/rtc/rtc-nxp-bbnsm.c | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-nxp-bbnsm.c b/drivers/rtc/rtc-nxp-bbnsm.c
index acbfbeb8b070..31225baddadf 100644
--- a/drivers/rtc/rtc-nxp-bbnsm.c
+++ b/drivers/rtc/rtc-nxp-bbnsm.c
@@ -197,13 +197,30 @@ static int bbnsm_rtc_probe(struct platform_device *pdev)
 	if (ret) {
 		dev_err(&pdev->dev, "failed to request irq %d: %d\n",
 			bbnsm->irq, ret);
-		return ret;
+		goto err;
 	}
 
 	bbnsm->rtc->ops = &bbnsm_rtc_ops;
 	bbnsm->rtc->range_max = U32_MAX;
 
-	return devm_rtc_register_device(bbnsm->rtc);
+	ret = devm_rtc_register_device(bbnsm->rtc);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register rtc :%d\n", ret);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	dev_pm_clear_wake_irq(&pdev->dev);
+	device_init_wakeup(&pdev->dev, false);
+	return ret;
+}
+
+static void bbnsm_rtc_remove(struct platform_device *pdev)
+{
+	dev_pm_clear_wake_irq(&pdev->dev);
+	device_init_wakeup(&pdev->dev, false);
 }
 
 static const struct of_device_id bbnsm_dt_ids[] = {
@@ -218,6 +235,7 @@ static struct platform_driver bbnsm_rtc_driver = {
 		.of_match_table = bbnsm_dt_ids,
 	},
 	.probe = bbnsm_rtc_probe,
+	.remove = bbnsm_rtc_remove,
 };
 module_platform_driver(bbnsm_rtc_driver);
 
-- 
2.37.1