[0/6] can: c_can: add support to 64 messages objects

Message

Dario Binacchi Feb. 24, 2021, 10:52 p.m. UTC

The D_CAN controller supports up to 128 messages. Until now the driver
only managed 32 messages although Sitara processors and DRA7 SOC can
handle 64.

The series was tested on a beaglebone board.

Note:
I have not changed the type of tx_field (belonging to the c_can_priv
structure) to atomic64_t because I think the atomic_t type has size
of at least 32 bits on x86 and arm, which is enough to handle 64
messages.
http://marc.info/?l=linux-can&m=139746476821294&w=2 reports the results
of tests performed just on x86 and arm architectures.


Dario Binacchi (6):
  can: c_can: remove unused code
  can: c_can: fix indentation
  can: c_can: fix control interface used by c_can_do_tx
  can: c_can: use 32-bit write to set arbitration register
  can: c_can: prepare to up the message objects number
  can: c_can: add support to 64 messages objects

 drivers/net/can/c_can/c_can.c          | 83 ++++++++++++++++----------
 drivers/net/can/c_can/c_can.h          | 32 ++++------
 drivers/net/can/c_can/c_can_platform.c |  6 +-
 3 files changed, 69 insertions(+), 52 deletions(-)