From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org ([63.228.1.57]:46233 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932423AbeFZXV3 (ORCPT ); Tue, 26 Jun 2018 19:21:29 -0400 From: Benjamin Herrenschmidt Subject: [PATCH 00/14] fsi: Fixes and Coldfire coprocessor offload Date: Wed, 27 Jun 2018 09:20:55 +1000 Message-Id: <20180626232109.10944-1-benh@kernel.crashing.org> Sender: devicetree-owner@vger.kernel.org To: Joel Stanley Cc: linux-aspeed@lists.ozlabs.org, openbmc@lists.ozlabs.org, devicetree@vger.kernel.org, Andrew Jeffery , linux-kernel@vger.kernel.org-v2 List-ID: (This is a resend, apprently only the first 2 patches ever made it out last week ...) This series implements support for offloading the FSI protocol bitbanging to the ColdFire secondary core of the Aspeed SoCs. The result increases FSI performance by a factor of 4, and on systems that don't support async FSI clock, provide much more regular and continuous clocking which helps reliability. Patch 1 may go a different route and was already posted a few weeks ago, I included it for completeness. Patches 2..9 add some infrastructure to the FSI core to control some of the FSI protocol delays and adjustements/fixes to the existing GPIO bitbanging master. They are "mechanical" dependencies Patch 10 moves some protocol definitions to a common place where the new master driver can find them Patch 11 is the DT binding for the new driver with comes with patch 12 Finally patch 13 and 14 update the Romulus and Palmetto board device-trees to use the new driver. There's another dependency on the Aspeed GPIO driver changes for handling with GPIO lines ownership and handshaking. The patches have been submitted and can be found for reference there: https://github.com/ozbenh/linux-ast/commits/gpio Finally, the driver needs a machine specific firmware file. The firwmare is open source and available at: https://github.com/ozbenh/cf-fsi I will submit it to linux-firmware if there's enough popular demand ;-)