From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Rob Herring <robh+dt@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, Hans de Goede <hdegoede@redhat.com>,
John Stultz <john.stultz@linaro.org>,
Felipe Balbi <felipe.balbi@linux.intel.com>,
Badhri Jagan Sridharan <badhri@google.com>,
Linus Walleij <linus.walleij@linaro.org>,
linux-usb@vger.kernel.org, Yu Chen <chenyu56@huawei.com>,
linux-kernel@vger.kernel.org, Biju Das <biju.das@bp.renesas.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
linux-mediatek@lists.infradead.org,
Min Guo <min.guo@mediatek.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
Nagarjuna Kristam <nkristam@nvidia.com>,
Adam Thomson <Adam.Thomson.Opensource@diasemi.com>,
linux-arm-kernel@lists.infradead.org, Li Jun <jun.li@nxp.com>
Subject: [PATCH v7 05/10] usb: roles: Introduce stubs for the exiting functions in role.h.
Date: Tue, 11 Jun 2019 16:44:35 +0800 [thread overview]
Message-ID: <1560242680-23844-6-git-send-email-chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <1560242680-23844-1-git-send-email-chunfeng.yun@mediatek.com>
From: Yu Chen <chenyu56@huawei.com>
This patch adds stubs for the exiting functions while
CONFIG_USB_ROLE_SWITCH does not enabled.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Yu Chen <chenyu56@huawei.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v7:
add Signed-off-by Chunfeng
v6:
merge this patch [1] into this series to add new API
[1] https://patchwork.kernel.org/patch/10909971/
---
include/linux/usb/role.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/include/linux/usb/role.h b/include/linux/usb/role.h
index c05ffa6abda9..da2b9641b877 100644
--- a/include/linux/usb/role.h
+++ b/include/linux/usb/role.h
@@ -42,6 +42,8 @@ struct usb_role_switch_desc {
bool allow_userspace_control;
};
+
+#if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)
int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role);
enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw);
struct usb_role_switch *usb_role_switch_get(struct device *dev);
@@ -51,5 +53,33 @@ struct usb_role_switch *
usb_role_switch_register(struct device *parent,
const struct usb_role_switch_desc *desc);
void usb_role_switch_unregister(struct usb_role_switch *sw);
+#else
+static inline int usb_role_switch_set_role(struct usb_role_switch *sw,
+ enum usb_role role)
+{
+ return 0;
+}
+
+static inline enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw)
+{
+ return USB_ROLE_NONE;
+}
+
+static inline struct usb_role_switch *usb_role_switch_get(struct device *dev)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static inline void usb_role_switch_put(struct usb_role_switch *sw) { }
+
+static inline struct usb_role_switch *
+usb_role_switch_register(struct device *parent,
+ const struct usb_role_switch_desc *desc)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static inline void usb_role_switch_unregister(struct usb_role_switch *sw) { }
+#endif
#endif /* __LINUX_USB_ROLE_H */
--
2.21.0
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next prev parent reply other threads:[~2019-06-11 8:45 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-11 8:44 [PATCH v7 00/10] add USB Type-B GPIO connector driver Chunfeng Yun
2019-06-11 8:44 ` [PATCH v7 01/10] dt-binding: usb: add usb-role-switch property Chunfeng Yun
2019-06-11 8:44 ` [PATCH v7 02/10] dt-bindings: connector: add optional properties for Type-B Chunfeng Yun
2019-06-11 8:44 ` [PATCH v7 03/10] dt-bindings: usb: add binding for Type-B GPIO connector driver Chunfeng Yun
2019-06-11 8:44 ` [PATCH v7 04/10] dt-bindings: usb: mtu3: add properties about USB Role Switch Chunfeng Yun
2019-06-11 8:44 ` Chunfeng Yun [this message]
2019-06-11 8:44 ` [PATCH v7 06/10] device connection: Add fwnode_connection_find_match() Chunfeng Yun
2019-06-11 8:44 ` [PATCH v7 07/10] usb: roles: Add fwnode_usb_role_switch_get() function Chunfeng Yun
2019-06-11 8:44 ` [PATCH v7 08/10] usb: roles: get usb-role-switch from parent Chunfeng Yun
2019-06-11 8:44 ` [PATCH v7 09/10] usb: roles: add USB Type-B GPIO connector driver Chunfeng Yun
2019-06-24 9:58 ` Heikki Krogerus
2019-06-25 8:55 ` Chunfeng Yun
2019-06-11 8:44 ` [PATCH v7 10/10] usb: mtu3: register a USB Role Switch for dual role mode Chunfeng Yun
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