From mboxrd@z Thu Jan 1 00:00:00 1970 From: Franklin S Cooper Jr Subject: [PATCH v3 0/4] can: Support transceiver based bit rate limit Date: Wed, 2 Aug 2017 19:51:46 -0500 Message-ID: <20170803005150.9286-1-fcooper@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-can@vger.kernel.org, wg@grandegger.com, mkl@pengutronix.de, robh+dt@kernel.org, quentin.schulz@free-electrons.com, dev.kurt@vandijck-laurijssen.be, andrew@lunn.ch, sergei.shtylyov@cogentembedded.com, socketcan@hartkopp.net Cc: Franklin S Cooper Jr List-Id: devicetree@vger.kernel.org Add a new generic binding that CAN drivers can be used to specify the max bit rate supported by a transceiver. This is useful since in some instances since the maximum speeds may be limited by the transceiver used. However, transceivers may not provide a means to determine this limitation at runtime. Therefore, create a new binding that mimics "fixed-link" that allows a user to hardcode the max speeds that can be used. Also add support for this new binding in the MCAN driver. Note this is an optional subnode so even if a driver adds support for parsing fixed-transceiver the user does not have to define it in their device tree. Version 3 changes: Switch from having two "max bitrates" to one universal bitrate. Version 2 changes: Rename function Define proper variable default Drop unit address Move check to changelink function Reword commit message Reword documentation Franklin S Cooper Jr (4): can: dev: Add support for limiting configured bitrate dt-bindings: can: fixed-transceiver: Add new CAN fixed transceiver bindings dt-bindings: can: m_can: Include reference to new fixed transceiver binding can: m_can: Add call to of_can_transceiver_fixed .../bindings/net/can/fixed-transceiver.txt | 24 +++++++++++ .../devicetree/bindings/net/can/m_can.txt | 9 ++++ drivers/net/can/dev.c | 50 ++++++++++++++++++++++ drivers/net/can/m_can/m_can.c | 2 + include/linux/can/dev.h | 5 +++ 5 files changed, 90 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/can/fixed-transceiver.txt -- 2.9.4.dirty