Path: csiph.com!eternal-september.org!feeder.eternal-september.org!aioe.org!bofh.it!news.nic.it!robomod From: Franklin S Cooper Jr Newsgroups: linux.kernel Subject: [PATCH 2/4] can: fixed-transceiver: Add documentation for CAN fixed transceiver bindings Date: Thu, 20 Jul 2017 01:40:01 +0200 Message-ID: References: Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1500507429; bh=BrDY2hasLQzTgigrKP7r2+LQKEF2NrmZ7odVpCrXysg=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=OerCFKqgeLsgvevy5rYRmXlfH6UOFO4EZfOJ1LR9SyHYolJd4JzxVvTFuwKLYGEYb xvlkfKRrF+HazmQk1mTmy7MmxjW/z+R5ii6/VTe7tZW/j6VrVoicHoIiiQvZ6SvGXa zHqty8eBEKhCKkb8pX2/MYasB2I4tAiOBYQ7gPCM= X-Mailer: git-send-email 2.10.0 MIME-Version: 1.0 Content-Type: text/plain Sender: robomod@news.nic.it List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Approved: robomod@news.nic.it Lines: 49 Organization: linux.* mail to news gateway X-Original-Cc: Franklin S Cooper Jr X-Original-Date: Wed, 19 Jul 2017 18:36:52 -0500 X-Original-Message-ID: <20170719233654.25908-3-fcooper@ti.com> X-Original-References: <20170719233654.25908-1-fcooper@ti.com> X-Original-Sender: linux-kernel-owner@vger.kernel.org Xref: csiph.com linux.kernel:1692276 Add documentation to describe usage of the new fixed transceiver binding. This new binding is applicable for any CAN device therefore it exist as its own document. Signed-off-by: Franklin S Cooper Jr --- .../bindings/net/can/fixed-transceiver.txt | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/can/fixed-transceiver.txt diff --git a/Documentation/devicetree/bindings/net/can/fixed-transceiver.txt b/Documentation/devicetree/bindings/net/can/fixed-transceiver.txt new file mode 100644 index 0000000..7c093c3 --- /dev/null +++ b/Documentation/devicetree/bindings/net/can/fixed-transceiver.txt @@ -0,0 +1,31 @@ +Fixed transceiver Device Tree binding +------------------------------ + +CAN transceiver typically limits the max speed in standard CAN and CAN FD +modes. Typically these limitations are static and the transceivers themselves +provide no way to detect this limitation at runtime. For this situation, +the "fixed-transceiver" node can be used. + +Properties: + +Optional: + max-arbitration-speed: a positive value non 0 value that determines the max + speed CAN can run in non CAN-FD mode or during the + arbitration phase in CAN-FD mode. + + max-data-speed: a positive value that determines the max data rate + that can be used in CAN-FD mode. A value of 0 + implies CAN-FD is not supported by the transceiver. + +Examples: + +Based on Texas Instrument's TCAN1042HGV CAN Transceiver + +m_can0 { + .... + fixed-transceiver@0 { + max-arbitration-speed = <1000000>; + max-data-speed = <5000000>; + }; + ... +}; -- 2.10.0