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usb: typec: Find the ports 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 <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Jun Li <[email protected]>
Signed-off-by: Heikki Krogerus <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Heikki Krogerus 2019-02-13 10:45:55 +03:00 • committed by Greg Kroah-Hartman
commit 6a0bbcf96b
1 changed files with 21 additions and 3 deletions
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24
drivers/usb/typec/class.c
View file

@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/property.h>
#include <linux/slab.h>
#include "bus.h"
@ -204,15 +205,32 @@ static void typec_altmode_put_partner(struct altmode *altmode)
put_device(&adev->dev);
}
static int __typec_port_match(struct device *dev, const void *name)
static int typec_port_fwnode_match(struct device *dev, const void *fwnode)
{
return dev_fwnode(dev) == fwnode;
}
static int typec_port_name_match(struct device *dev, const void *name)
{
return !strcmp((const char *)name, dev_name(dev));
}
static void *typec_port_match(struct device_connection *con, int ep, void *data)
{
return class_find_device(typec_class, NULL, con->endpoint[ep],
__typec_port_match);
struct device *dev;
/*
* FIXME: Check does the fwnode supports the requested SVID. If it does
* we need to return ERR_PTR(-PROBE_DEFER) when there is no device.
*/
if (con->fwnode)
return class_find_device(typec_class, NULL, con->fwnode,
typec_port_fwnode_match);
dev = class_find_device(typec_class, NULL, con->endpoint[ep],
typec_port_name_match);
return dev ? dev : ERR_PTR(-EPROBE_DEFER);
}
struct typec_altmode *