linux-kernel - [PATCH 0/6] can: c_can: add support to 64 messages objects

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Message-Id: <20210224225246.11346-1-dariobin@libero.it>
Date:   Wed, 24 Feb 2021 23:52:40 +0100
From:   Dario Binacchi <dariobin@...ero.it>
To:     linux-kernel@...r.kernel.org
Cc:     Dario Binacchi <dariobin@...ero.it>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Oliver Hartkopp <socketcan@...tkopp.net>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        YueHaibing <yuehaibing@...wei.com>,
        Zhang Qilong <zhangqilong3@...wei.com>,
        linux-can@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH 0/6] can: c_can: add support to 64 messages objects


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(-)

-- 
2.17.1