From: Hui Song <hui.song_1@nxp.com>
To: linux-devel@linux.nxdi.nxp.com
Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
Song Hui <hui.song_1@nxp.com>
Subject: [PATCH v1] gpio: mpc8xxx: Add shutdown function.
Date: Wed, 8 Apr 2020 18:55:22 +0800 [thread overview]
Message-ID: <20200408105522.18194-1-hui.song_1@nxp.com> (raw)
From: Song Hui <hui.song_1@nxp.com>
The shutdown function needed to make interrupt handler to be NULL
when kexec execute.
Signed-off-by: Song Hui <hui.song_1@nxp.com>
---
drivers/gpio/gpio-mpc8xxx.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 604dfec..a24e6c5 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -446,9 +446,21 @@ static int mpc8xxx_remove(struct platform_device *pdev)
return 0;
}
+static int mpc8xxx_shutdown(struct platform_device *pdev)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = platform_get_drvdata(pdev);
+
+ if (mpc8xxx_gc->irq) {
+ irq_set_chained_handler_and_data(mpc8xxx_gc->irqn, NULL, NULL);
+ irq_domain_remove(mpc8xxx_gc->irq);
+ }
+
+ return 0;
+}
static struct platform_driver mpc8xxx_plat_driver = {
.probe = mpc8xxx_probe,
.remove = mpc8xxx_remove,
+ .shutdown = mpc8xxx_shutdown,
.driver = {
.name = "gpio-mpc8xxx",
.of_match_table = mpc8xxx_gpio_ids,
--
2.9.5
next reply other threads:[~2020-04-08 11:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-08 10:55 Hui Song [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-04-08 10:21 [PATCH v1] gpio: mpc8xxx: Add shutdown function Hui Song
2020-04-08 10:55 ` Russell King - ARM Linux admin
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