From patchwork Wed Nov 28 16:05:54 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 10702943 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BC7E513A4 for ; Wed, 28 Nov 2018 16:06:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA7B52D9BA for ; Wed, 28 Nov 2018 16:06:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9E44E2D9C0; Wed, 28 Nov 2018 16:06:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BFF332D9BC for ; Wed, 28 Nov 2018 16:06:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728833AbeK2DIa (ORCPT ); Wed, 28 Nov 2018 22:08:30 -0500 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:38942 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728664AbeK2DI3 (ORCPT ); Wed, 28 Nov 2018 22:08:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=Date:Message-Id:In-Reply-To: Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References: List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner: List-Archive; bh=USn8T5DUuL0JBN1z09MrPjgcjZaOWlHTBNpQBu+adh0=; b=V77yvcqI3nz6 Bs1KQRU5EO/+LiryrzafdrKs3TUWEP/nI690WdE4sx7xd65WL9pWHjYN4riL6nm6ARMY01lHNYw4v Rak6JWFlyO9DrJw5MvP78tt/i4rpJXm4/HNBunkqBG/jIQU/L+YArSAKM21M5XogqwUUPfJMKtm2C jDxrI=; Received: from cpc102320-sgyl38-2-0-cust46.18-2.cable.virginm.net ([82.37.168.47] helo=debutante.sirena.org.uk) by heliosphere.sirena.org.uk with esmtpa (Exim 4.89) (envelope-from ) id 1gS2La-0005xh-Hx; Wed, 28 Nov 2018 16:05:54 +0000 Received: by debutante.sirena.org.uk (Postfix, from userid 1000) id 460C0112521B; Wed, 28 Nov 2018 16:05:54 +0000 (GMT) From: Mark Brown To: Radu Pirea Cc: Mark Brown , richard.genoud@gmail.com, lee.jones@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, nicolas.ferre@microchip.com, alexandre.belloni@bootlin.com, ludovic.desroches@microchip.co, broonie@kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-spi@vger.kernel.org Subject: Applied "spi: at91-usart: add power management support" to the spi tree In-Reply-To: <20181121112732.15690-2-radu_nicolae.pirea@upb.ro> Message-Id: <20181128160554.460C0112521B@debutante.sirena.org.uk> Date: Wed, 28 Nov 2018 16:05:54 +0000 (GMT) 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: at91-usart: add power management support has been applied to the spi tree at https://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 96ed3ecde2c0911ffa11838050a058c2a40742f0 Mon Sep 17 00:00:00 2001 From: Radu Pirea Date: Wed, 21 Nov 2018 13:27:30 +0200 Subject: [PATCH] spi: at91-usart: add power management support This patch implements power management callback function for USART as SPI driver. Signed-off-by: Radu Pirea Signed-off-by: Mark Brown --- drivers/spi/spi-at91-usart.c | 61 ++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/drivers/spi/spi-at91-usart.c b/drivers/spi/spi-at91-usart.c index a924657642fa..0b07c746453d 100644 --- a/drivers/spi/spi-at91-usart.c +++ b/drivers/spi/spi-at91-usart.c @@ -13,6 +13,7 @@ #include #include #include +#include #include @@ -399,6 +400,59 @@ static int at91_usart_spi_probe(struct platform_device *pdev) return ret; } +__maybe_unused static int at91_usart_spi_runtime_suspend(struct device *dev) +{ + struct spi_controller *ctlr = dev_get_drvdata(dev); + struct at91_usart_spi *aus = spi_master_get_devdata(ctlr); + + clk_disable_unprepare(aus->clk); + pinctrl_pm_select_sleep_state(dev); + + return 0; +} + +__maybe_unused static int at91_usart_spi_runtime_resume(struct device *dev) +{ + struct spi_controller *ctrl = dev_get_drvdata(dev); + struct at91_usart_spi *aus = spi_master_get_devdata(ctrl); + + pinctrl_pm_select_default_state(dev); + + return clk_prepare_enable(aus->clk); +} + +__maybe_unused static int at91_usart_spi_suspend(struct device *dev) +{ + struct spi_controller *ctrl = dev_get_drvdata(dev); + int ret; + + ret = spi_controller_suspend(ctrl); + if (ret) + return ret; + + if (!pm_runtime_suspended(dev)) + at91_usart_spi_runtime_suspend(dev); + + return 0; +} + +__maybe_unused static int at91_usart_spi_resume(struct device *dev) +{ + struct spi_controller *ctrl = dev_get_drvdata(dev); + struct at91_usart_spi *aus = spi_master_get_devdata(ctrl); + int ret; + + if (!pm_runtime_suspended(dev)) { + ret = at91_usart_spi_runtime_resume(dev); + if (ret) + return ret; + } + + at91_usart_spi_init(aus); + + return spi_controller_resume(ctrl); +} + static int at91_usart_spi_remove(struct platform_device *pdev) { struct spi_controller *ctlr = platform_get_drvdata(pdev); @@ -409,6 +463,12 @@ static int at91_usart_spi_remove(struct platform_device *pdev) return 0; } +static const struct dev_pm_ops at91_usart_spi_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(at91_usart_spi_suspend, at91_usart_spi_resume) + SET_RUNTIME_PM_OPS(at91_usart_spi_runtime_suspend, + at91_usart_spi_runtime_resume, NULL) +}; + static const struct of_device_id at91_usart_spi_dt_ids[] = { { .compatible = "microchip,at91sam9g45-usart-spi"}, { /* sentinel */} @@ -419,6 +479,7 @@ MODULE_DEVICE_TABLE(of, at91_usart_spi_dt_ids); static struct platform_driver at91_usart_spi_driver = { .driver = { .name = "at91_usart_spi", + .pm = &at91_usart_spi_pm_ops, }, .probe = at91_usart_spi_probe, .remove = at91_usart_spi_remove,