linux.git/drivers/usb/typec/class.c, branch v5.11

usb: typec: Send uevent for num_altmodes update

2021-01-07T13:22:22+00:00

Generate a change uevent when the "number_of_alternate_modes" sysfs file
for partners and plugs is updated by a port driver.

Cc: Heikki Krogerus 
Cc: Benson Leung 
Signed-off-by: Prashant Malani 
Link: https://lore.kernel.org/r/20210107034904.4112029-1-pmalani@chromium.org
Signed-off-by: Greg Kroah-Hartman

usb: typec: Add class for plug alt mode device

2020-12-11T10:07:59+00:00

Add the Type C class for plug alternate mode devices which are being
registered by the Type C connector class. This ensures that udev events
get generated when the plug alt modes are registered.

Cc: Heikki Krogerus 
Reviewed-by: Benson Leung 
Reviewed-by: Heikki Krogerus 
Signed-off-by: Prashant Malani 
Link: https://lore.kernel.org/r/20201210211653.879044-1-pmalani@chromium.org
Signed-off-by: Greg Kroah-Hartman

usb: typec: Add type sysfs attribute file for partners

2020-11-26T12:40:43+00:00

USB Power Delivery Specification defines a set of product
types for partners and cables. The product type can be read
from the ID Header VDO which is the first object in the
response to the Discover Identity command. This attribute
will display the product type of the partner. The cables
already have the attribute.

This sysfs attribute file is only created for the partners
and cables if the product type is really known in the
driver. Some interfaces do not give access to the Discover
Identity response from the partner or cable, but they may
still supply the product type separately in some cases.

When the product type of the partner or cable is detected,
uevent is also raised with PRODUCT_TYPE set to show the
actual product type (for example PRODUCT_TYPE=host).

Signed-off-by: Heikki Krogerus 
Link: https://lore.kernel.org/r/20201126115735.50529-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman

usb: typec: Constify static attribute_group structs

2020-11-26T12:40:42+00:00

These are never modified, so make them const to allow the compiler to
put them in read-only memory. Done with the help of coccinelle.

Signed-off-by: Rikard Falkeborn 
Link: https://lore.kernel.org/r/20201125162500.37228-3-rikard.falkeborn@gmail.com
Signed-off-by: Greg Kroah-Hartman

usb: typec: Expose Product Type VDOs via sysfs

2020-11-26T08:21:13+00:00

A PD-capable device can return up to 3 Product Type VDOs as part of its
DiscoverIdentity Response (USB PD Spec, Rev 3.0, Version 2.0, Section
6.4.4.3.1). Add sysfs attributes to expose these to userspace.

Cc: Benson Leung 
Cc: Heikki Krogerus 
Reviewed-by: Heikki Krogerus 
Signed-off-by: Prashant Malani 
Link: https://lore.kernel.org/r/20201125084911.1077462-2-pmalani@chromium.org
Signed-off-by: Greg Kroah-Hartman

usb: typec: Fix num_altmodes kernel-doc error

2020-11-20T08:41:46+00:00

The commit to introduce the num_altmodes attribute for partner had an
error where one of the parameters was named differently in the comment
and the function signature. Fix the version in the comment to align with
what is in the function signature.

This fixes the following htmldocs warning:

drivers/usb/typec/class.c:632: warning: Excess function parameter 'num_alt_modes' description in 'typec_partner_set_num_altmodes'

Fixes: a0ccdc4a77a1 ("usb: typec: Add number of altmodes partner attr")
Reviewed-by: Heikki Krogerus 
Signed-off-by: Prashant Malani 
Link: https://lore.kernel.org/r/20201120063523.4159877-1-pmalani@chromium.org
Reported-by: Stephen Rothwell 
Signed-off-by: Greg Kroah-Hartman

usb: typec: Add plug num_altmodes sysfs attr

2020-11-18T12:15:58+00:00

Add a field to the typec_plug struct to record the number of available
altmodes as well as the corresponding sysfs attribute to expose this to
userspace.

This allows userspace to determine whether there are any
remaining alternate modes left to be registered by the kernel driver. It
can begin executing any policy state machine after all available
alternate modes have been registered with the connector class framework.

This value is set to "-1" initially, signifying that a valid number of
alternate modes haven't been set for the plug. The sysfs file remains
hidden as long as the attribute value is -1.

We re-use the partner attribute for number_of_alternate_modes since the
usage and name is similar, and update the corresponding *_show() command
to support both partner and plugs.

Signed-off-by: Prashant Malani 
Reviewed-by: Heikki Krogerus 
Link: https://lore.kernel.org/r/20201116201150.2919178-4-pmalani@chromium.org
Signed-off-by: Greg Kroah-Hartman

usb: typec: Add number of altmodes partner attr

2020-11-18T11:55:46+00:00

Add a user-visible attribute for the number of alternate modes available
in a partner. This allows userspace to determine whether there are any
remaining alternate modes left to be registered by the kernel driver. It
can begin executing any policy state machine after all available
alternate modes have been registered with the connector class framework.

This value is set to "-1" initially, signifying that a valid number of
alternate modes haven't been set for the partner.

Also add a sysfs file which exposes this attribute. The file remains
hidden as long as the attribute value is -1.

Cc: Benson Leung 
Cc: Heikki Krogerus 
Signed-off-by: Prashant Malani 
Reviewed-by: Heikki Krogerus 
Link: https://lore.kernel.org/r/20201116201150.2919178-3-pmalani@chromium.org
Signed-off-by: Greg Kroah-Hartman

usb: typec: add typec_find_pwr_opmode

2020-10-02T13:30:31+00:00

This patch adds a function that converts power operation mode string into
power operation mode value.

It is useful to configure power operation mode through device tree
property, as power capabilities may be linked to hardware design.

Acked-by: Heikki Krogerus 
Signed-off-by: Amelie Delaunay 
Link: https://lore.kernel.org/r/20200924090049.9041-3-amelie.delaunay@st.com
Signed-off-by: Greg Kroah-Hartman

usb: typec: Comment correction for typec_partner_register_altmode

2020-07-21T11:38:21+00:00

typec_register_altmode returns ERR_PTR on failure.

Signed-off-by: Kyle Tso 
Reviewed-by: Guenter Roeck 
Link: https://lore.kernel.org/r/20200714033453.4044482-2-kyletso@google.com
Signed-off-by: Greg Kroah-Hartman