linux-kernel - [PATCH 1/3] spmi: Add driver shutdown support

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Message-ID: <1596445047-2975-2-git-send-email-hsin-hsiung.wang@mediatek.com>
Date:   Mon, 3 Aug 2020 16:57:25 +0800
From:   Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
To:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     Liam Girdwood <lgirdwood@...il.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-msm@...r.kernel.org>, <srv_heupstream@...iatek.com>
Subject: [PATCH 1/3] spmi: Add driver shutdown support

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

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
---
 drivers/spmi/spmi.c  | 12 ++++++++++++
 drivers/spmi/spmi.c  | 12 ++++++++++++
 include/linux/spmi.h |  1 +
 2 files changed, 13 insertions(+)

diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c
index c16b60f..5fde024 100644
--- a/drivers/spmi/spmi.c
+++ b/drivers/spmi/spmi.c
@@ -357,6 +357,17 @@ 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)
+		return;
+
+
+	if (sdrv->shutdown)
+		sdrv->shutdown(to_spmi_device(dev));
+}
+}
+
 static int spmi_drv_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	int ret;
@@ -373,6 +384,7 @@ static struct bus_type spmi_bus_type = {
@@ -373,6 +384,7 @@ 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 394a3f6..729bcbf 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)
-- 
2.6.4