linux-toradex.git/include/uapi/linux/can/netlink.h, branch v5.10-rc3

can: don't use deprecated license identifiers

2019-11-05T11:44:34+00:00

The "GPL-2.0" license identifier changed to "GPL-2.0-only" in SPDX v3.0.

Signed-off-by: Yegor Yefremov 
Acked-by: Oliver Hartkopp 
Signed-off-by: Marc Kleine-Budde

can: netlink: fix documentation typos

2019-08-13T15:32:21+00:00

This patch fixes some documentation typos in struct can_bittiming_const.

Signed-off-by: Andre Hartmann 
Signed-off-by: Marc Kleine-Budde

can: dev: Add support for limiting configured bitrate

2018-01-16T14:11:32+00:00

Various CAN or CAN-FD IP may be able to run at a faster rate than
what the transceiver the CAN node is connected to. This can lead to
unexpected errors. However, CAN transceivers typically have fixed
limitations and provide no means to discover these limitations at
runtime. Therefore, add support for a can-transceiver node that
can be reused by other CAN peripheral drivers to determine for both
CAN and CAN-FD what the max bitrate that can be used. If the user
tries to configure CAN to pass these maximum bitrates it will throw
an error.

Also add support for reading bitrate_max via the netlink interface.

Reviewed-by: Suman Anna 
Signed-off-by: Franklin S Cooper Jr 
[nsekhar@ti.com: fix build error with !CONFIG_OF]
Signed-off-by: Sekhar Nori 
Signed-off-by: Faiz Abbas 
Signed-off-by: Marc Kleine-Budde

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02T10:20:11+00:00

Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be.  This makes it hard for
compliance tools to determine the correct license.

Update these files with an SPDX license identifier.  The identifier was
chosen based on the license information in the file.

GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.

Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier.  The format
is:
        ((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)

SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text.  The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

Reviewed-by: Kate Stewart 
Reviewed-by: Philippe Ombredanne 
Reviewed-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

can: dev: add CAN interface API for fixed bitrates

2017-01-24T12:52:00+00:00

Some CAN interfaces only support fixed fixed bitrates. This patch adds a
netlink interface to get the list of the CAN interface's fixed bitrates and
data bitrates.

Inside the driver arrays of supported data- bitrate values are defined.

const u32 drvname_bitrate[] = { 20000, 50000, 100000 };
const u32 drvname_data_bitrate[] = { 200000, 500000, 1000000 };

struct drvname_priv *priv;
priv = netdev_priv(dev);

priv->bitrate_const = drvname_bitrate;
priv->bitrate_const_cnt = ARRAY_SIZE(drvname_bitrate);
priv->data_bitrate_const = drvname_data_bitrate;
priv->data_bitrate_const_cnt = ARRAY_SIZE(drvname_data_bitrate);

Signed-off-by: Marc Kleine-Budde

can: dev: add CAN interface termination API

2017-01-24T12:52:00+00:00

This patch adds a netlink interface to configure the CAN bus termination of
CAN interfaces.

Inside the driver an array of supported termination values is defined:

const u16 drvname_termination[] = { 60, 120, CAN_TERMINATION_DISABLED };

struct drvname_priv *priv;
priv = netdev_priv(dev);

priv->termination_const = drvname_termination;
priv->termination_const_cnt = ARRAY_SIZE(drvname_termination);
priv->termination = CAN_TERMINATION_DISABLED;

And the funtion to set the value has to be defined:

priv->do_set_termination = drvname_set_termination;

Signed-off-by: Oliver Hartkopp 
Reviewed-by: Ramesh Shanmugasundaram 
Signed-off-by: Marc Kleine-Budde

can: m_can: tag current CAN FD controllers as non-ISO

2015-01-15T15:57:59+00:00

During the CAN FD standardization process within the ISO it turned out that
the failure detection capability has to be improved.

The CAN in Automation organization (CiA) defined the already implemented CAN
FD controllers as 'non-ISO' and the upcoming improved CAN FD controllers as
'ISO' compliant. See at http://www.can-cia.com/index.php?id=1937

Finally there will be three types of CAN FD controllers in the future:

1. ISO compliant (fixed)
2. non-ISO compliant (fixed, like the M_CAN IP v3.0.1 in m_can.c)
3. ISO/non-ISO CAN FD controllers (switchable, like the PEAK USB FD)

So the current M_CAN driver for the M_CAN IP v3.0.1 has to expose its non-ISO
implementation by setting the CAN_CTRLMODE_FD_NON_ISO ctrlmode at startup.
As this bit cannot be switched at configuration time CAN_CTRLMODE_FD_NON_ISO
must not be set in ctrlmode_supported of the current M_CAN driver.

Signed-off-by: Oliver Hartkopp 
Cc: linux-stable 
Signed-off-by: Marc Kleine-Budde

can: netlink: Add CAN_CTRLMODE_PRESUME_ACK flag

2014-07-15T07:34:19+00:00

Most CAN controllers have a support for ignoring ACK absence. Some of
them refer to this feature as a self test mode (e. g. SJA1000) and some
include it as a part of a loopback mode (e. g. MCP2510).

Setting the introduced flag via netlink should make CAN controller
perform a successful transmission, even if there is no acknowledgement
(dominant ACK bit) received.

Signed-off-by: Nikita Edward Baruzdin 
Acked-by: Oliver Hartkopp 
Signed-off-by: Marc Kleine-Budde

can: netlink: Remove space before tab

2014-07-15T07:33:57+00:00

Fixes the corresponing checkpatch.pl warning.

Signed-off-by: Nikita Edward Baruzdin 
Acked-by: Oliver Hartkopp 
Signed-off-by: Marc Kleine-Budde

can: unify identifiers to ensure unique include processing

2014-05-19T07:38:24+00:00

Armin pointed me to the fact that the identifier which is used to ensure the
unique include processing in lunux/include/uapi/linux/can.h is CAN_H.
This clashed with his own source as includes from libraries and APIs should
use an underscore '_' at the identifier start.

This patch fixes the protection identifiers in all CAN relavant includes.

Reported-by: Armin Burchardt 
Signed-off-by: Oliver Hartkopp 
Signed-off-by: Marc Kleine-Budde