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usb: roles: Find the muxes by also matching against the device node

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When the connections are defined in firmware, struct
device_connection will have the fwnode member pointing to
the device node (struct fwnode_handle) of the requested
device, and the endpoint will not be used at all in that
case.

Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jun Li <jun.li@nxp.com>
Tested-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus 2019-02-13 10:45:54 +03:00 committed by Greg Kroah-Hartman
parent 80e04837a4
commit ec69e9533c
2 changed files with 20 additions and 3 deletions
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21
drivers/usb/roles/class.c
View File

@ -8,6 +8,7 @@
*/
#include <linux/usb/role.h>
#include <linux/property.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
@ -84,7 +85,12 @@ enum usb_role usb_role_switch_get_role(struct usb_role_switch *sw)
}
EXPORT_SYMBOL_GPL(usb_role_switch_get_role);
static int __switch_match(struct device *dev, const void *name)
static int switch_fwnode_match(struct device *dev, const void *fwnode)
{
return dev_fwnode(dev) == fwnode;
}
static int switch_name_match(struct device *dev, const void *name)
{
return !strcmp((const char *)name, dev_name(dev));
}
@ -94,8 +100,16 @@ static void *usb_role_switch_match(struct device_connection *con, int ep,
{
struct device *dev;
dev = class_find_device(role_class, NULL, con->endpoint[ep],
__switch_match);
if (con->fwnode) {
if (!fwnode_property_present(con->fwnode, con->id))
return NULL;
dev = class_find_device(role_class, NULL, con->fwnode,
switch_fwnode_match);
} else {
dev = class_find_device(role_class, NULL, con->endpoint[ep],
switch_name_match);
}
return dev ? to_role_switch(dev) : ERR_PTR(-EPROBE_DEFER);
}
@ -266,6 +280,7 @@ usb_role_switch_register(struct device *parent,
sw->get = desc->get;
sw->dev.parent = parent;
sw->dev.fwnode = desc->fwnode;
sw->dev.class = role_class;
sw->dev.type = &usb_role_dev_type;
dev_set_name(&sw->dev, "%s-role-switch", dev_name(parent));

2
include/linux/usb/role.h
View File

@ -18,6 +18,7 @@ typedef enum usb_role (*usb_role_switch_get_t)(struct device *dev);
/**
* struct usb_role_switch_desc - USB Role Switch Descriptor
* @fwnode: The device node to be associated with the role switch
* @usb2_port: Optional reference to the host controller port device (USB2)
* @usb3_port: Optional reference to the host controller port device (USB3)
* @udc: Optional reference to the peripheral controller device
@ -32,6 +33,7 @@ typedef enum usb_role (*usb_role_switch_get_t)(struct device *dev);
* usb_role_switch_register() before registering the switch.
*/
struct usb_role_switch_desc {
struct fwnode_handle *fwnode;
struct device *usb2_port;
struct device *usb3_port;
struct device *udc;