Replace kzalloc() with devm_kzalloc(). By doing this, we do not need
to care anymore about having to call kfree(). This result in a
simpler and more easy to read code.

Link: https://lore.kernel.org/r/20210628155420.1176217-4-mailhol.vincent@wanadoo.frSigned-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Make es58x_init_es58x_dev return a pointer to the allocated structure
instead of returning an integer. Errors are handled through the helper
function ERR_PTR and IS_ERR.

This slightly simplifies the code.

Link: https://lore.kernel.org/r/20210628155420.1176217-3-mailhol.vincent@wanadoo.frSigned-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Change the author name from "lastname firstname" to "firstname
lastname".

Fix a typo in a variable name in the documentation of struct
es58x_parameters::fifo_mask.

Fix a typo in the title of the datasheet (E701 -> E70) and re-indent
the comments.

Link: https://lore.kernel.org/r/20210628155420.1176217-2-mailhol.vincent@wanadoo.frSigned-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch updates old code by using the can_change_state() function
published since by the socket-can module.

In particular, this new code better manages the change of bus state by
also using the value of the error counters that the driver now
systematically asks for when initializing the channel.

Link: https://lore.kernel.org/r/20210715142842.35793-1-s.grosjean@peak-system.comSigned-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch adds information by replacing a hard-coded values with its
symbol and a adding comment.

Link: https://lore.kernel.org/r/20210625130931.27438-5-s.grosjean@peak-system.comSigned-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

The CAN - USB PCAN-USB interface is able to generate one-shot frames
as well as loopback frames that it transmits starting from version 4.1
of its firmware.

This patch adds support for the one-shot and loopback functionality to
the driver, that can be activated if the embedded firmware allows it.
If the driver detects that the PCAN-USB device runs an old firmware
(< 4.1) it prints a message suggesting to contact
<support@peak-system.com> for a possible firmware update.

Link: https://lore.kernel.org/r/20210625130931.27438-3-s.grosjean@peak-system.comSigned-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

In case of error, reading value from response argument is useless.

Link: https://lore.kernel.org/r/20210625130931.27438-2-s.grosjean@peak-system.comSigned-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch adds name and (possibly) firmware version information to
the kernel about the detected PEAK-System CAN - PCI/PCIe interface
card.

Link: https://lore.kernel.org/r/20210607151720.13571-1-s.grosjean@peak-system.comSigned-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
[mkl: reformated struct pci_device_id peak_pci_tbl]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch cleans several checkpatch warnings in the peak_pci driver.

Cc: Stephane Grosjean <s.grosjean@peak-system.com>
Link: https://lore.kernel.org/r/20210616102811.2449426-0-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch converts all comments to network subsystem style comments.

Cc: Stephane Grosjean <s.grosjean@peak-system.com>
Link: https://lore.kernel.org/r/20210616102811.2449426-8-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Networking block comments don't use an empty /* line,
use /* Comment...

Block comments use * on subsequent lines.
Block comments use a trailing */ on a separate line.

This patch fixes the comments style issues.

Link: https://lore.kernel.org/r/1624096589-13452-9-git-send-email-huangguangbin2@huawei.comSigned-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

According to the chackpatch.pl, no space before tabs.

Link: https://lore.kernel.org/r/1624096589-13452-8-git-send-email-huangguangbin2@huawei.comSigned-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Braces {} should be used on all arms of this statement.

Link: https://lore.kernel.org/r/1624096589-13452-7-git-send-email-huangguangbin2@huawei.comSigned-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Alignment should match open parenthesis.

Link: https://lore.kernel.org/r/1624096589-13452-6-git-send-email-huangguangbin2@huawei.comSigned-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch uses the BIT macro for setting individual bits,
to fix the following checkpatch.pl issue:
CHECK: Prefer using the BIT macro.

Link: https://lore.kernel.org/r/1624096589-13452-5-git-send-email-huangguangbin2@huawei.comSigned-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Macros with complex values should be enclosed in parentheses

Link: https://lore.kernel.org/r/1624096589-13452-4-git-send-email-huangguangbin2@huawei.comSigned-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch fixes the checkpatch error about missing a blank line
after declarations.

Link: https://lore.kernel.org/r/1624096589-13452-3-git-send-email-huangguangbin2@huawei.comSigned-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch removes some redundant blank lines.

Link: https://lore.kernel.org/r/1624096589-13452-2-git-send-email-huangguangbin2@huawei.comSigned-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Use DEVICE_ATTR_RW() helper macro instead of plain DEVICE_ATTR(), which
makes the code a bit shorter and easier to read.

Link: https://lore.kernel.org/r/20210603100233.11877-1-thunder.leizhen@huawei.comSigned-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Use DEVICE_ATTR_RO/RW() helper macro instead of plain DEVICE_ATTR(), which
makes the code a bit shorter and easier to read.

Link: https://lore.kernel.org/r/20210603111739.11983-1-thunder.leizhen@huawei.comSigned-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Use DEVICE_ATTR_RO() helper macro instead of plain DEVICE_ATTR(), which
makes the code a bit shorter and easier to read.

Link: https://lore.kernel.org/r/20210603110902.11930-1-thunder.leizhen@huawei.comSigned-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

The driver's IRQ handler supports shared IRQs, so request a shared IRQ
handler.

Link: https://lore.kernel.org/r/20210724205212.737328-1-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

The driver is neither dependent on OF, nor it requires any OF headers.
Fix header block to clarify independence from OF.

Link: https://lore.kernel.org/r/http://lore.kernel.org/r/20210531084444.1785397-2-mkl@pengutronix.deSigned-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

In some configurations, mainly ACPI-based, the clock frequency of the
device is supplied by very well established 'clock-frequency'
property. Hence, try to get it from the property at last if no other
providers are available.

Link: https://lore.kernel.org/r/20210531084444.1785397-1-mkl@pengutronix.deSigned-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Since commit aee2b3cc ("can: tcan4x5x: fix bittiming const, use
common bittiming from m_can driver") there is no use of the device
specific bit timing parameters (m_can_classdev::bit_timing and struct
m_can_classdev::data_timing).

This patch removes the support for custom bit timing from the driver,
as the common bit timing works for all known IP core implementations.

Cc: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Link: https://lore.kernel.org/r/20210616102811.2449426-7-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Use the devm_platform_ioremap_resource_byname() helper instead of
calling platform_get_resource_byname() and devm_ioremap_resource()
separately.

Link: https://lore.kernel.org/r/20210603073441.2983497-1-yangyingliang@huawei.comSigned-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Add support for implementing transceiver node as phy. The max_bitrate
is obtained by getting a phy attribute.

Link: https://lore.kernel.org/r/20210724174001.553047-1-mkl@pengutronix.deSigned-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Some transceivers need a configuration step (for example, pulling the
standby or enable lines) for them to start sending messages. The
transceiver can be implemented as a phy with the configuration done in
the phy driver. The bit rate limitation can the be obtained by the
driver using the phy node.

Document the above implementation in the bosch mcan bindings.

Link: https://lore.kernel.org/r/20210510052541.14168-2-a-govindraju@ti.comSigned-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

can_validate() does a first check:

|	if (is_can_fd) {
|		if (!data[IFLA_CAN_BITTIMING] || !data[IFLA_CAN_DATA_BITTIMING])
|			return -EOPNOTSUPP;
|	}

If that first if succeeds, we know that if is_can_fd is true then
data[IFLA_CAN_BITTIMING is set.

However, the next if switch does not leverage on above knowledge and
redoes the check:

| 	if (data[IFLA_CAN_DATA_BITTIMING]) {
|		if (!is_can_fd || !data[IFLA_CAN_BITTIMING])
|		                   ^~~~~~~~~~~~~~~~~~~~~~~~
| 			return -EOPNOTSUPP;
| 	}

This patch removes that redundant check.

Link: https://lore.kernel.org/r/20210603151550.140727-2-mailhol.vincent@wanadoo.frSigned-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

When the FD is turned off through the netlink interface, the data bit
timing values still remain in data_bittiming and are displayed despite
of the feature being disabled.

Example:

| $ ip link set can0 type can bitrate 500000 dbitrate 2000000 fd on
| $ ip --details link show can0
| 1:  can0: <NOARP,ECHO> mtu 72 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 10
|     link/can  promiscuity 0 minmtu 0 maxmtu 0
|     can <FD> state STOPPED restart-ms 0
| 	  bitrate 500000 sample-point 0.875
| 	  tq 12 prop-seg 69 phase-seg1 70 phase-seg2 20 sjw 1
| 	  ES582.1/ES584.1: tseg1 2..256 tseg2 2..128 sjw 1..128 brp 1..512 brp-inc 1
| 	  dbitrate 2000000 dsample-point 0.750
| 	  dtq 12 dprop-seg 14 dphase-seg1 15 dphase-seg2 10 dsjw 1
| 	  ES582.1/ES584.1: dtseg1 2..32 dtseg2 1..16 dsjw 1..8 dbrp 1..32 dbrp-inc 1
| 	  clock 80000000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
|
| $ ip link set can0 type can bitrate 500000 fd off
| $ ip --details link show can0
| 1:  can0: <NOARP,ECHO> mtu 16 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 10
|     link/can  promiscuity 0 minmtu 0 maxmtu 0
|     can state STOPPED restart-ms 0
| 	  bitrate 500000 sample-point 0.875
| 	  tq 12 prop-seg 69 phase-seg1 70 phase-seg2 20 sjw 1
| 	  ES582.1/ES584.1: tseg1 2..256 tseg2 2..128 sjw 1..128 brp 1..512 brp-inc 1
| 	  dbitrate 2000000 dsample-point 0.750
| 	  dtq 12 dprop-seg 14 dphase-seg1 15 dphase-seg2 10 dsjw 1
| 	  ES582.1/ES584.1: dtseg1 2..32 dtseg2 1..16 dsjw 1..8 dbrp 1..32 dbrp-inc 1
| 	  clock 80000000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535

Remark: once FD is turned off, it is not possible to turn fd back on
and reuse the previously input data bit timing values:

| $ ip link set can0 type can bitrate 500000 fd on
| RTNETLINK answers: Operation not supported

This means that the user will need to re-configure the data bit timing
in order to turn fd on again.

Because old data bit timing values cannot be reused, this patch clears
priv->data_bit timing whenever FD is turned off. This way, the data
bit timing variables are not displayed anymore.

Link: https://lore.kernel.org/r/20210618081904.141114-2-mailhol.vincent@wanadoo.frSigned-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch fixes a typo in the documentation for struct can_tdc::tdcv.
The number "0" refers to automatic mode not the letter "O".

Further two grammar errors in the documentation for struct can_tdc are
fixed.

First grammar error: add a missing third person 's'.

Second grammar error: replace "such as" by "such that". The intent is
to give a condition, not an example.

Fixes: 289ea9e4 ("can: add new CAN FD bittiming parameters: Transmitter Delay Compensation (TDC)")
Link: https://lore.kernel.org/r/20210616095922.2430415-1-mkl@pengutronix.de
Link: https://lore.kernel.org/r/20210616124057.60723-1-mailhol.vincent@wanadoo.frCo-developed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Acked-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

can: rx-offload: can_rx_offload_threaded_irq_finish(): add new function to be called from threaded interrupt

After reading all CAN frames from the controller in the IRQ handler
and storing them into a skb_queue, the driver calls napi_schedule().
In the napi poll function the skb from the skb_queue are then pushed
into the networking stack.

However if napi_schedule() is called from a threaded IRQ handler this
triggers the following error:

| NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!!

To avoid this, create a new rx-offload
function (can_rx_offload_threaded_irq_finish()) with a call to
local_bh_disable()/local_bh_enable() around the napi_schedule() call.

Convert all drivers that call can_rx_offload_irq_finish() from
threaded IRQ context to can_rx_offload_threaded_irq_finish().

Link: https://lore.kernel.org/r/20210724204745.736053-4-mkl@pengutronix.deSuggested-by: Daniel Glöckner <dg@emlix.com>
Tested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Instead of calling can_rx_offload_schedule() call napi_schedule()
directly. As this was the last use of can_rx_offload_schedule() remove
this helper function.

Link: https://lore.kernel.org/r/20210724204745.736053-3-mkl@pengutronix.deTested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Adding a skb to the skb_queue in rx-offload requires to take a lock.

This commit avoids this by adding an unlocked skb queue that is
appended at the end of the ISR. Having one lock at the end of the ISR
should be OK as the HW is empty, not about to overflow.

Link: https://lore.kernel.org/r/20210724204745.736053-2-mkl@pengutronix.deTested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Co-developed-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

In the j1939_xtp_rx_dat_one() function, there are 2 variables (skb and
se_skb) holding a skb. The control buffer of the skbs is accessed one
after the other, but using the same "skcb" variable.

To avoid confusion introduce a new variable "se_skcb" to access the
se_skb's control buffer as done in the rest of this file, too.

Cc: Robin van der Gracht <robin@protonic.nl>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20210616102811.2449426-6-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch changes the name of the "skcb" variable in
j1939_session_tx_dat() to "se_skcb" as it's the session skb's control
buffer. The same name is used in other functions for the session skb's
control buffer.

Cc: Robin van der Gracht <robin@protonic.nl>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20210616102811.2449426-5-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch changes the name of the "skb" variable in
j1939_session_completed() to "se_skb" as it's the session skb. The
same name is used in other functions for the session skb.

Cc: Robin van der Gracht <robin@protonic.nl>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20210616102811.2449426-4-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Replace the existing /* fall through */ comments the new
pseudo-keyword macro fallthrough.

Cc: Robin van der Gracht <robin@protonic.nl>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20210616102811.2449426-3-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch fixes a checkpatch warning about a long line and wrong
indention.

Cc: Robin van der Gracht <robin@protonic.nl>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20210616102811.2449426-2-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Correct a grammatical error.

Link: https://lore.kernel.org/r/20210611043933.17047-1-13145886936@163.comSigned-off-by: gushengxian <gushengxian@yulong.com>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>