linux-kernel - [PATCH] rtc: zynqmp: Add shutdown callback for kexec support

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Message-ID: <20250724170517.974356-1-harini.t@amd.com>
Date: Thu, 24 Jul 2025 22:35:17 +0530
From: Harini T <harini.t@....com>
To: <alexandre.belloni@...tlin.com>, <michal.simek@....com>
CC: <linux-rtc@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <git@....com>, Harini T <harini.t@....com>
Subject: [PATCH] rtc: zynqmp: Add shutdown callback for kexec support

During kexec, the hardware is not reset and any enabled interrupts can
interfere with the new kernel's RTC initialization.

The shutdown callback reuses the existing remove function to disable
alarm interrupts and wakeup capability, putting the device in a
quiescent state rather than completely removing it.

Signed-off-by: Harini T <harini.t@....com>
---
 drivers/rtc/rtc-zynqmp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/rtc/rtc-zynqmp.c b/drivers/rtc/rtc-zynqmp.c
index f39102b66eac..26893367f0f5 100644
--- a/drivers/rtc/rtc-zynqmp.c
+++ b/drivers/rtc/rtc-zynqmp.c
@@ -383,6 +383,7 @@ MODULE_DEVICE_TABLE(of, xlnx_rtc_of_match);
 static struct platform_driver xlnx_rtc_driver = {
 	.probe		= xlnx_rtc_probe,
 	.remove		= xlnx_rtc_remove,
+	.shutdown	= xlnx_rtc_remove,
 	.driver		= {
 		.name	= KBUILD_MODNAME,
 		.pm	= &xlnx_rtc_pm_ops,
-- 
2.43.0