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Date: Tue, 11 Jun 2019 16:44:37 +0800 From: Chunfeng Yun <chunfeng.yun@...iatek.com> To: Rob Herring <robh+dt@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Heikki Krogerus <heikki.krogerus@...ux.intel.com> CC: Mark Rutland <mark.rutland@....com>, Chunfeng Yun <chunfeng.yun@...iatek.com>, Matthias Brugger <matthias.bgg@...il.com>, Adam Thomson <Adam.Thomson.Opensource@...semi.com>, Li Jun <jun.li@....com>, Badhri Jagan Sridharan <badhri@...gle.com>, Hans de Goede <hdegoede@...hat.com>, Andy Shevchenko <andy.shevchenko@...il.com>, Min Guo <min.guo@...iatek.com>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>, Biju Das <biju.das@...renesas.com>, Linus Walleij <linus.walleij@...aro.org>, Yu Chen <chenyu56@...wei.com>, Nagarjuna Kristam <nkristam@...dia.com>, Felipe Balbi <felipe.balbi@...ux.intel.com> Subject: [PATCH v7 07/10] usb: roles: Add fwnode_usb_role_switch_get() function From: Heikki Krogerus <heikki.krogerus@...ux.intel.com> The fwnode_usb_role_switch_get() function is exactly the same as usb_role_switch_get(), except that it takes struct fwnode_handle as parameter instead of struct device. Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com> Tested-by: Biju Das <biju.das@...renesas.com> --- v7: add signed-off-by Chunfeng and tested-by Biju v6: new patch --- drivers/usb/roles/class.c | 20 ++++++++++++++++++++ include/linux/usb/role.h | 7 +++++++ 2 files changed, 27 insertions(+) diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c index 86defca6623e..5b637aaf311f 100644 --- a/drivers/usb/roles/class.c +++ b/drivers/usb/roles/class.c @@ -135,6 +135,26 @@ struct usb_role_switch *usb_role_switch_get(struct device *dev) } EXPORT_SYMBOL_GPL(usb_role_switch_get); +/** + * fwnode_usb_role_switch_get - Find USB role switch linked with the caller + * @fwnode: The caller device node + * + * This is similar to the usb_role_switch_get() function above, but it searches + * the switch using fwnode instead of device entry. + */ +struct usb_role_switch *fwnode_usb_role_switch_get(struct fwnode_handle *fwnode) +{ + struct usb_role_switch *sw; + + sw = fwnode_connection_find_match(fwnode, "usb-role-switch", NULL, + usb_role_switch_match); + if (!IS_ERR_OR_NULL(sw)) + WARN_ON(!try_module_get(sw->dev.parent->driver->owner)); + + return sw; +} +EXPORT_SYMBOL_GPL(fwnode_usb_role_switch_get); + /** * usb_role_switch_put - Release handle to a switch * @sw: USB Role Switch diff --git a/include/linux/usb/role.h b/include/linux/usb/role.h index da2b9641b877..2d77f97df72d 100644 --- a/include/linux/usb/role.h +++ b/include/linux/usb/role.h @@ -47,6 +47,7 @@ struct usb_role_switch_desc { 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); +struct usb_role_switch *fwnode_usb_role_switch_get(struct fwnode_handle *node); void usb_role_switch_put(struct usb_role_switch *sw); struct usb_role_switch * @@ -70,6 +71,12 @@ static inline struct usb_role_switch *usb_role_switch_get(struct device *dev) return ERR_PTR(-ENODEV); } +static inline struct usb_role_switch * +fwnode_usb_role_switch_get(struct fwnode_handle *node) +{ + return ERR_PTR(-ENODEV); +} + static inline void usb_role_switch_put(struct usb_role_switch *sw) { } static inline struct usb_role_switch * -- 2.21.0
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