From patchwork Fri Sep 15 14:04:02 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Romain Izard X-Patchwork-Id: 814294 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-pwm-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="UrMJMf71"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3xty035HWhz9s7m for ; Sat, 16 Sep 2017 00:07:31 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751400AbdIOOEm (ORCPT ); Fri, 15 Sep 2017 10:04:42 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:37756 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751364AbdIOOEj (ORCPT ); Fri, 15 Sep 2017 10:04:39 -0400 Received: by mail-wm0-f65.google.com with SMTP id f4so2877607wmh.4; Fri, 15 Sep 2017 07:04:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=ZOE6mSORyd32Z+XivRdOjpv+WfGVy1Eu7ppcpFUenUs=; b=UrMJMf71vrGrI6EFJ+tdaRP6VnlkzAEEBNmUXnucrKZjSnF89FgIED8jQ0NT8m/CcZ uTQMrI1m7Y0gd7rlkTRdQwob5RmhnQo0/yGNHz/AkXjfDPihFkD/FHn5Pd8o9q513onX sElQR1ywqkzpbYHXs65BkbV2gQ9mZQEij4JHIXgABLg54pykQcCDPqB/BkU5GmLhBXIV zsZ+ga87oo24yimH5zz9giy3IL0ICcUgqw79G737FzrRiFwDST0AOOEo/E54qKrx+W4G nIDY5KiHfRJj2aZ/K8yeR58VXChtoMQQv/Nxs/wMN5tdvGRgpP0pw9C8YlRCqbo/b60g 6nnQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=ZOE6mSORyd32Z+XivRdOjpv+WfGVy1Eu7ppcpFUenUs=; b=U0loTa6Y2QNyo7mZBYSoV1E7j7Xy0breSC4tIOhaXCdX7YJhZqFvb+eOTFqDhg8yrH hNp7+tr87NYvEzEaMP0teySlw5y7K7PXwwQ9qX0UYEUmgDRaCgxyJ2dH+hPopPsVQ56H FtnTTOOHpAHiWG4sAV1Y+FAoHyE+vZVGZYVYCzXV4N8xqP+fkicCSHDBKlwluaOb/OAT 9eMoQ2s49+lncL/zGJj4rO0XHOUjSjU8N7lAJF6DFgi46kUEGzbgUViCIywC/w8BDo9s CJBXXE+HlMVuYzkOagaC/Zo8Xi+Wiep3X5lrrVhcuARM9p6YR0U1g8bJkPtpPrOUsc3T HTog== X-Gm-Message-State: AHPjjUiHYf6NLjxLd/fG6BCNpPNKYCLBEOl1RN9BOq1xa1hpppAMtTAk RPTV+WI6eLDxvQ== X-Google-Smtp-Source: AOwi7QCJMoLzY6bWNkH1DvvAV28ENIag/wW4piV6YqJlnq93EHv/ajYoo5T77ByeOXwVWUNl4T1nbA== X-Received: by 10.28.11.195 with SMTP id 186mr2703215wml.41.1505484277996; Fri, 15 Sep 2017 07:04:37 -0700 (PDT) Received: from localhost.localdomain (146.187.3.109.rev.sfr.net. [109.3.187.146]) by smtp.gmail.com with ESMTPSA id 55sm1399225wrw.60.2017.09.15.07.04.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 15 Sep 2017 07:04:37 -0700 (PDT) From: Romain Izard To: Nicolas Ferre , Alexandre Belloni , Boris Brezillon , Michael Turquette , Stephen Boyd , Ludovic Desroches , Wenyou Yang , Josh Wu , David Woodhouse , Brian Norris , Marek Vasut , Cyrille Pitchen , Thierry Reding , Richard Genoud , Greg Kroah-Hartman , Alan Stern Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-pwm@vger.kernel.org, linux-serial@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Romain Izard Subject: [PATCH v2 0/9] Various patches for SAMA5D2 backup mode Date: Fri, 15 Sep 2017 16:04:02 +0200 Message-Id: <20170915140411.31716-1-romain.izard.pro@gmail.com> X-Mailer: git-send-email 2.11.0 Sender: linux-pwm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pwm@vger.kernel.org While the core of the backup mode for SAMA5D2 has been integrated in v4.13, it is far from complete. Individual controllers in the chip have drivers that do not support the reset of the registers during suspend, and they need to be adapted to handle it. The first patch uses the clock wakeup code from the prototype backup mode instead of the version integrated in the mainline, as the mainline version is not stable. During a test loop with two-second backup suspend, the mainline version will hang in less than one day, whereas the prototype version has been running the same test for more than a week without hanging. Changes in v2: * drop the IIO patch duplicating existing code * determine the number of programmable clocks to save dynamically * declare a required local variable in the tty/serial patch Romain Izard (9): clk: at91: pmc: Wait for clocks when resuming clk: at91: pmc: Save SCSR during suspend clk: at91: pmc: Support backup for programmable clocks mtd: nand: atmel: Avoid ECC errors when leaving backup mode mtd: nand: atmel: Report PMECC failures as errors ehci-atmel: Power down during suspend is normal pwm: atmel-tcb: Support backup mode atmel_flexcom: Support backup mode tty/serial: atmel: Prevent a warning on suspend drivers/clk/at91/clk-programmable.c | 2 ++ drivers/clk/at91/pmc.c | 55 +++++++++++++++++++++++++------ drivers/clk/at91/pmc.h | 2 ++ drivers/mfd/atmel-flexcom.c | 65 ++++++++++++++++++++++++++++--------- drivers/mtd/nand/atmel/pmecc.c | 15 ++++----- drivers/pwm/pwm-atmel-tcb.c | 63 +++++++++++++++++++++++++++++++++-- drivers/tty/serial/atmel_serial.c | 14 ++++++++ drivers/usb/host/ehci-atmel.c | 3 +- 8 files changed, 182 insertions(+), 37 deletions(-)