From patchwork Thu Mar 7 12:52:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 1052860 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=nic.cz Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=nic.cz header.i=@nic.cz header.b="IRf9RCXG"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44FVtX1062z9sNG for ; Thu, 7 Mar 2019 23:53:40 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726275AbfCGMxU (ORCPT ); Thu, 7 Mar 2019 07:53:20 -0500 Received: from mail.nic.cz ([217.31.204.67]:34451 "EHLO mail.nic.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726101AbfCGMxS (ORCPT ); Thu, 7 Mar 2019 07:53:18 -0500 Received: from dellmb.labs.office.nic.cz (unknown [IPv6:2001:1488:fffe:6:cac7:3539:7f1f:463]) by mail.nic.cz (Postfix) with ESMTP id 36116633EF; Thu, 7 Mar 2019 13:53:15 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1551963195; bh=gtOfD2MZKCSmq4GCwQ4L9gKprttf0yWXffULGODrOZs=; h=From:To:Date; b=IRf9RCXGKqw1/xwqyWmOquYFPnPpmle0+KCjBdpw5hAIBaAx3JN8NvygJJD50NqVy SU0v+Jul/G3LLfezQsWXdSYUao+BcUmhr3EAZUJRfBAaR1ES1Rl/G6+32xg3Esoyfg e9Qw7u/yLhUct/f6+gIF51NLaw0+hZZdsD9ZI5dk= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Linus Walleij Cc: Tony Lindgren , Shawn Guo , linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Arnd Bergmann , =?utf-8?q?Marek_Beh=C3=BAn?= Subject: [PATCH v4 armsoc/drivers/bus+gpio 0/5] Add Moxtet bus and GPIO over Moxtet bus Date: Thu, 7 Mar 2019 13:52:46 +0100 Message-Id: <20190307125251.724-1-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Hello, this is the fourth version of patches to support the Moxtet bus and GPIOs over it. Moxtet is a Turris Mox specific tiny bus over SPI. I know that merge window is now closed, but I am trying this anyway now, since Documentation/process/2.Process.rst mentions that even when merge window is closed, "An occasional exception is made for drivers for previously-unsupported hardware; if they touch no in-tree code, they cannot cause regressions and should be safe to add at any time." These patches apply to current linux/master, linux-gpio/devel and arm-soc/arm/drivers. I would appreciate reviews for the changes I made. I removed the Acked-by, since the changes in drivers/bus/moxtet.c are non-trivial. Marek Changes since v3: - added module_description file in /sys/bus/moxtet/devices/*/ - moved debugging into debugfs: - removed input_value and output_value debug files from /sys/bus/moxtet/devices/*/ - added input and output debug files to debugfs/moxtet - added support for interrupts into moxtet driver: Some modules send interrupt via a shared line for all modules. In addition to this, they also send interrupt information via the SPI shift register, so that the system can distinguish which modules exactly sent it and won't have to check all modules. This is also needed to fix some bugs when one module sent IRQ and then another module sent another IRQ before the first was handled by the system, but the handling was already in progress. Since the shared line is falling-edge, the second IRQ was never handled. - since moxtet driver is now also interrupt controller, device-tree binding documentation is also changed Changes since v2: - addressed the issues in device tree documentation pointed by Rob Herring - cosmetic changes suggested by Linus Walleij - added sysfs ABI documentation for /sys/bus/moxtet/devices attribute files as suggested by Linus Walleij Marek Behún (5): bus: Add support for Moxtet bus dt-bindings: bus: Document moxtet bus binding bus: moxtet: Add sysfs and debugfs documentation drivers: gpio: Add support for GPIOs over Moxtet bus dt-bindings: gpio: Document GPIOs via Moxtet bus Documentation/ABI/testing/debugfs-moxtet | 23 + .../ABI/testing/sysfs-bus-moxtet-devices | 17 + .../devicetree/bindings/bus/moxtet.txt | 44 + .../devicetree/bindings/gpio/gpio-moxtet.txt | 18 + MAINTAINERS | 12 + drivers/bus/Kconfig | 10 + drivers/bus/Makefile | 1 + drivers/bus/moxtet.c | 886 ++++++++++++++++++ drivers/gpio/Kconfig | 9 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-moxtet.c | 179 ++++ include/dt-bindings/bus/moxtet.h | 16 + include/linux/moxtet.h | 109 +++ 13 files changed, 1325 insertions(+) create mode 100644 Documentation/ABI/testing/debugfs-moxtet create mode 100644 Documentation/ABI/testing/sysfs-bus-moxtet-devices create mode 100644 Documentation/devicetree/bindings/bus/moxtet.txt create mode 100644 Documentation/devicetree/bindings/gpio/gpio-moxtet.txt create mode 100644 drivers/bus/moxtet.c create mode 100644 drivers/gpio/gpio-moxtet.c create mode 100644 include/dt-bindings/bus/moxtet.h create mode 100644 include/linux/moxtet.h