linux-toradex.git/include/linux/usb/role.h, branch v6.16-rc6

usb: roles: fix include/linux/usb/role.h compile issue

2022-01-25T17:30:15+00:00

when CONFIG_USB_ROLE_SWITCH is not defined,
add usb_role_switch_find_by_fwnode() definition which return NULL.

Fixes: c6919d5e0cd1 ("usb: roles: Add usb_role_switch_find_by_fwnode()")
Signed-off-by: Linyu Yuan 
Link: https://lore.kernel.org/r/1641818608-25039-1-git-send-email-quic_linyyuan@quicinc.com
Signed-off-by: Greg Kroah-Hartman

usb: roles: add helper usb_role_string()

2021-05-27T07:17:18+00:00

Introduces usb_role_string() function, which returns a
human-readable name of provided usb role, it's useful to
make the log readable.

Reviewed-by: Heikki Krogerus 
Signed-off-by: Chunfeng Yun 
Link: https://lore.kernel.org/r/1621932786-9335-1-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman

usb: roles: Allow the role switches to be named

2020-03-04T10:12:50+00:00

The switch devices have been named by using the name of the
parent device as base for now, but if for example the
parent device controls multiple muxes, that will not work.

Adding an optional member "name" to the switch descriptor
that can be used for naming the switch during registration.

Signed-off-by: Heikki Krogerus 
Link: https://lore.kernel.org/r/20200302135353.56659-7-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

usb: roles: Provide the switch drivers handle to the switch in the API

2020-03-04T10:12:50+00:00

The USB role callback functions had a parameter pointing to
the parent device (struct device) of the switch. The
assumption was that the switch parent is always the
controller. Firstly, that may not be true in every case, and
secondly, it prevents us from supporting devices that supply
multiple muxes.

Changing the first parameter of usb_role_switch_set_t and
usb_role_switch_get_t from struct device to struct
usb_role_switch.

Cc: Peter Chen 
Cc: Felipe Balbi 
Cc: Chunfeng Yun 
Cc: Bin Liu 
Signed-off-by: Heikki Krogerus 
Link: https://lore.kernel.org/r/20200302135353.56659-6-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

usb: roles: Leave the private driver data pointer to the drivers

2020-03-04T10:12:49+00:00

Adding usb_role_switch_get/set_drvdata() functions that the
switch drivers can use for setting and getting private data
pointer that is associated with the switch.

Signed-off-by: Heikki Krogerus 
Link: https://lore.kernel.org/r/20200302135353.56659-5-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

usb: roles: Add usb_role_switch_find_by_fwnode()

2019-11-04T14:05:25+00:00

Simple wrapper function that searches USB role switches with
class_find_device_by_fwnode().

Signed-off-by: Heikki Krogerus 
Reviewed-by: Hans de Goede 
Tested-by: Hans de Goede 
Link: https://lore.kernel.org/r/20191008122600.22340-2-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

usb: roles: Add fwnode_usb_role_switch_get() function

2019-09-03T14:46:17+00:00

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 
Signed-off-by: Chunfeng Yun 
Tested-by: Biju Das 
Link: https://lore.kernel.org/r/1567070558-29417-8-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman

usb: roles: Introduce stubs for the exiting functions in role.h

2019-09-03T14:02:32+00:00

This patch adds stubs for the exiting functions while
CONFIG_USB_ROLE_SWITCH does not enabled.

Cc: Greg Kroah-Hartman 
Cc: Heikki Krogerus 
Cc: Hans de Goede 
Cc: Andy Shevchenko 
Cc: John Stultz 
Reviewed-by: Heikki Krogerus 
Signed-off-by: Yu Chen 
Signed-off-by: Chunfeng Yun 
Link: https://lore.kernel.org/r/1567070558-29417-6-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman

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

2019-02-14T09:52:25+00:00

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 
Reviewed-by: Andy Shevchenko 
Reviewed-by: Jun Li 
Tested-by: Jun Li 
Signed-off-by: Heikki Krogerus 
Signed-off-by: Greg Kroah-Hartman

usb: common: Small class for USB role switches

2018-03-22T12:40:10+00:00

USB role switch is a device that can be used to choose the
data role for USB connector. With dual-role capable USB
controllers, the controller itself will be the switch, but
on some platforms the USB host and device controllers are
separate IPs and there is a mux between them and the
connector. On those platforms the mux driver will need to
register the switch.

With USB Type-C connectors, the host-to-device relationship
is negotiated over the Configuration Channel (CC). That
means the USB Type-C drivers need to be in control of the
role switch. The class provides a simple API for the USB
Type-C drivers for the control.

For other types of USB connectors (mainly microAB) the class
provides user space control via sysfs attribute file that
can be used to request role swapping from the switch.

Reviewed-by: Hans de Goede 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Heikki Krogerus 
Signed-off-by: Greg Kroah-Hartman