[PATCH v4 0/3] Adding support for CAN busses via SPI interface

[Stefano Babic <sbabic@denx.de>]

Hi all,

after some time, I post an updated version of the spi_can driver.
Sorry for that, but I had to wait for the requested modifications
on the microcontroller's firmware to test it again.

The majork change is the GET_CFG message to query the remote
CAN microcontroller for the CAN bittiming. I hope also I have fixed
all issues from previous reviews.


Changes in v4:
- added GET_CFG message to query bit timing to the remote controller.
- readded this patch to the series
- implement GET_CFG message to ask the microcontroller
  for bittiming consts.
- drop set_mode (never called)
- drop echo_index (never used)
- fix inconsistencies using int variable (int/u32)
- add reference to documentation in Kconfig help
- s/refTime/ref_time/
- move module parameters on the top
- use variable to get sizeof inside kzalloc/memset
- fix missing close_candev() in open entry point
- fix return values (spi_can_fill_skb_msg())
- not access skb after calling net_receive_skb()
- fix minor coding style issues
- add missing free_irq() and gpio_free() in probe when fails

Changes in v3:
- format documentation, check for lines > 80 chars (O. Hartkopp)
- patch 2/3 already aqpplied to can-next, removed from patchset
- spican.h renamed to spi_can.h
- drop further references to i.MX and HCS12, not yet cleaned
- drop CAN_DEV depend from Kconfig
- drop debug stuff via sysfs, not required in production code
- drop debug module parameter, use CAN_DEBUG_DEVICES
- drop unused bittiming constant
- chksum on as default. It could still be disabled via
  DT/pdata, but not via module parameter.

Changes in v2:
- drop all references to i.MX35 and HCS12

Stefano Babic (3):
  Add documentation for SPI to CAN driver
  CAN: moved SPI drivers into a separate directory
  CAN: CAN driver to support multiple CAN bus on SPI interface

 Documentation/networking/spi_can.txt |  774 +++++++++++++++++
 drivers/net/can/Kconfig              |    8 +-
 drivers/net/can/Makefile             |    2 +-
 drivers/net/can/spi/Kconfig          |   21 +
 drivers/net/can/spi/Makefile         |    9 +
 drivers/net/can/{ => spi}/mcp251x.c  |    0
 drivers/net/can/spi/spi_can.c        | 1531 ++++++++++++++++++++++++++++++++++
 include/linux/can/platform/spi_can.h |   33 +
 8 files changed, 2371 insertions(+), 7 deletions(-)
 create mode 100644 Documentation/networking/spi_can.txt
 create mode 100644 drivers/net/can/spi/Kconfig
 create mode 100644 drivers/net/can/spi/Makefile
 rename drivers/net/can/{ => spi}/mcp251x.c (100%)
 create mode 100644 drivers/net/can/spi/spi_can.c
 create mode 100644 include/linux/can/platform/spi_can.h

-- 
1.9.1