This patch adds support for the Holt HI-311x CAN controller. The HI311x
CAN controller is capable of transmitting and receiving standard data
frames, extended data frames and remote frames. The HI311x interfaces
with the host over SPI.
Datasheet: www.holtic.com/documents/371-hi-3110_v-rev-jpdf.do
Signed-off-by: Akshay Bhat <nodeax@gmail.com>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Silent ignorance of errors during probe procedure is a bad thing, this
patch fixes it. Extra message added for hardware initialization
failure. Such common issues are mostly caused by wrong wiring. Message
about success added as well, it should be useful to debug new hardware
configuration, especially in case of several CAN buses.
Signed-off-by: Ed Spiridonov <edo.rus@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Replace scheduled to be removed create_freezable_workqueue with
alloc_workqueue.
priv->wq should be explicitly set as freezable to ensure it is frozen
in the suspend sequence and work items are drained so that no new work
item starts execution until thawed. Thus, use of WQ_FREEZABLE flag
here is required.
WQ_MEM_RECLAIM flag has been set here to ensure forward progress
regardless of memory pressure.
The order of execution is not important so set @max_active as 0.
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Only two bits (RX0OVR and RX1OVR) are writable in EFLG, write is useless
if these bits aren't set.
Signed-off-by: Ed Spiridonov <edo.rus@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
An spi_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The regulators power and transceiver are optional. If those are not
present, the pointer (or error pointer) is correctly handled by the
driver, hence we can use devm_regulator_get_optional safely, which
avoids regulators getting created.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
If a valid power regulator or a dummy regulator is used (which
happens to be the case when no regulator is specified), restart_work
is queued no matter whether the device was running or not at suspend
time. Since work queues get initialized in the ndo_open callback,
resuming leads to a NULL pointer exception.
Reverse exactly the steps executed at suspend time:
- Enable the power regulator in any case
- Enable the transceiver regulator if the device was running, even in
case we have a power regulator
- Queue restart_work only in case the device was running
Fixes: bf66f3736a ("can: mcp251x: Move to threaded interrupts instead of workqueues.")
Signed-off-by: Stefan Agner <stefan@agner.ch>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This patch corrects addresses of acceptance filters. These registers are not in
use, but values should be correct. Tested with MCP2515 and am3352 and also
checked datasheets for MCP2515 and MCP2510.
Signed-off-by: Tomas Krcka <tomas.krcka@nkgroup.cz>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
In order to be able to move the stats increment from can_bus_off() into
can_change_state(), the increment had to be moved back into code that was using
can_bus_off() but not can_change_state().
As a side-effect, this patch fixes the following bugs:
* Redundant call to can_bus_off() in c_can.
* Bus-off counted twice in xilinx_can.
Signed-off-by: Andri Yngvason <andri.yngvason@marel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This patch moves the data allocated using dma_alloc_coherent to the
corresponding managed interface and does away with the calls to free the
allocated memory in the probe and remove functions.
Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
No need to manually copy debug settings into subdir Makefiles. kbuild
has a mechanism for inheriting, so let's use it.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
drivers/net/can/spi/mcp251x.c:953:7-27: ERROR: Threaded IRQ with no primary handler requested without IRQF_ONESHOT
Make sure threaded IRQs without a primary handler are always request with
IRQF_ONESHOT
Generated by: scripts/coccinelle/misc/irqf_oneshot.cocci
CC: Stefano Babic <sbabic@denx.de>
CC: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Create a directory for all CAN drivers using SPI and move mcp251x driver there.
Signed-off-by: Stefano Babic <sbabic@denx.de>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
