From patchwork Mon May 2 15:47:24 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 8993551 Return-Path: X-Original-To: patchwork-linux-spi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 49952BF29F for ; Mon, 2 May 2016 15:47:52 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 74AB720222 for ; Mon, 2 May 2016 15:47:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8CEDB20211 for ; Mon, 2 May 2016 15:47:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754088AbcEBPrk (ORCPT ); Mon, 2 May 2016 11:47:40 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:41926 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754222AbcEBPrd (ORCPT ); Mon, 2 May 2016 11:47:33 -0400 Received: from debutante.sirena.org.uk ([2a01:348:6:8808:fab::3] helo=debutante) by mezzanine.sirena.org.uk with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1axG4G-0002Ck-3V; Mon, 02 May 2016 15:47:28 +0000 Received: from broonie by debutante with local (Exim 4.87) (envelope-from ) id 1axG4C-0005RE-2M; Mon, 02 May 2016 16:47:24 +0100 From: Mark Brown To: Pramod Gurav Cc: Mark Brown , broonie@kernel.org, rjw@rjwysocki.net, ulf.hansson@linaro.org, andy.gross@linaro.org, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org In-Reply-To: <1462191244-30758-1-git-send-email-pramod.gurav@linaro.org> Message-Id: Date: Mon, 02 May 2016 16:47:24 +0100 X-SA-Exim-Connect-IP: 2a01:348:6:8808:fab::3 X-SA-Exim-Mail-From: broonie@sirena.org.uk X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Subject: Applied "spi: qup: Handle clocks in pm_runtime suspend and resume" to the spi tree X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The patch spi: qup: Handle clocks in pm_runtime suspend and resume has been applied to the spi tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark From dae1a7700b34eceae049cf8f1567a640528ca4c1 Mon Sep 17 00:00:00 2001 From: Pramod Gurav Date: Mon, 2 May 2016 17:44:03 +0530 Subject: [PATCH] spi: qup: Handle clocks in pm_runtime suspend and resume Clocks must ne disabled in pm_runtime to achieve some power saving. Enable the clocks when the device is runtime resumed during a transfer. Signed-off-by: Pramod Gurav Signed-off-by: Mark Brown --- drivers/spi/spi-qup.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 810a7fae3479..e42ff613c0e0 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -937,6 +937,10 @@ static int spi_qup_pm_suspend_runtime(struct device *device) config = readl(controller->base + QUP_CONFIG); config |= QUP_CONFIG_CLOCK_AUTO_GATE; writel_relaxed(config, controller->base + QUP_CONFIG); + + clk_disable_unprepare(controller->cclk); + clk_disable_unprepare(controller->iclk); + return 0; } @@ -945,6 +949,15 @@ static int spi_qup_pm_resume_runtime(struct device *device) struct spi_master *master = dev_get_drvdata(device); struct spi_qup *controller = spi_master_get_devdata(master); u32 config; + int ret; + + ret = clk_prepare_enable(controller->iclk); + if (ret) + return ret; + + ret = clk_prepare_enable(controller->cclk); + if (ret) + return ret; /* Disable clocks auto gaiting */ config = readl_relaxed(controller->base + QUP_CONFIG);