linux-kernel - [PATCH 3/4] spmi: Add driver shutdown support

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Date:   Wed,  9 Dec 2020 18:33:43 -0800
From:   Stephen Boyd <sboyd@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] spmi: Add driver shutdown support

From: Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>

Add new shutdown() method.  Use it in the standard driver model style.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
Link: https://lore.kernel.org/r/1603187810-30481-2-git-send-email-hsin-hsiung.wang@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
---
 drivers/spmi/spmi.c  | 9 +++++++++
 include/linux/spmi.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c
index 253340e10dab..51f5aeb65b3b 100644
--- a/drivers/spmi/spmi.c
+++ b/drivers/spmi/spmi.c
@@ -359,6 +359,14 @@ static int spmi_drv_remove(struct device *dev)
 	return 0;
 }
 
+static void spmi_drv_shutdown(struct device *dev)
+{
+	const struct spmi_driver *sdrv = to_spmi_driver(dev->driver);
+
+	if (sdrv && sdrv->shutdown)
+		sdrv->shutdown(to_spmi_device(dev));
+}
+
 static int spmi_drv_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	int ret;
@@ -375,6 +383,7 @@ static struct bus_type spmi_bus_type = {
 	.match		= spmi_device_match,
 	.probe		= spmi_drv_probe,
 	.remove		= spmi_drv_remove,
+	.shutdown	= spmi_drv_shutdown,
 	.uevent		= spmi_drv_uevent,
 };
 
diff --git a/include/linux/spmi.h b/include/linux/spmi.h
index 394a3f68bad5..729bcbf9f5ad 100644
--- a/include/linux/spmi.h
+++ b/include/linux/spmi.h
@@ -138,6 +138,7 @@ struct spmi_driver {
 	struct device_driver driver;
 	int	(*probe)(struct spmi_device *sdev);
 	void	(*remove)(struct spmi_device *sdev);
+	void	(*shutdown)(struct spmi_device *sdev);
 };
 
 static inline struct spmi_driver *to_spmi_driver(struct device_driver *d)
-- 
https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/
https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git