Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752624AbdHJBAN (ORCPT ); Wed, 9 Aug 2017 21:00:13 -0400 Received: from lelnx194.ext.ti.com ([198.47.27.80]:56128 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752264AbdHJBAJ (ORCPT ); Wed, 9 Aug 2017 21:00:09 -0400 From: Franklin S Cooper Jr To: , , , , , , , , , , , CC: Franklin S Cooper Jr Subject: [PATCH v4 0/4] can: Support transceiver based bit rate limit Date: Wed, 9 Aug 2017 19:59:12 -0500 Message-ID: <20170810005916.27163-1-fcooper@ti.com> X-Mailer: git-send-email 2.9.4.dirty MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1789 Lines: 46 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 can-transceiver the user does not have to define it in their device tree. Version 4 changes: Switch from fixed-transceiver to can-transceiver Drop unit address that snuck back in again. Indicate that can-transceiver is a subnode and not a property in documentation 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: can-transceiver: Document new binding dt-bindings: can: m_can: Document new can transceiver binding can: m_can: Add call to of_can_transceiver .../bindings/net/can/can-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/can-transceiver.txt -- 2.9.4.dirty