From patchwork Fri Mar 8 13:12:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ludovic BARRE X-Patchwork-Id: 10844679 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 EE31B1390 for ; Fri, 8 Mar 2019 13:13:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D3AE32E079 for ; Fri, 8 Mar 2019 13:13:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C1F512E095; Fri, 8 Mar 2019 13:13:43 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 55EF22E079 for ; Fri, 8 Mar 2019 13:13:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8vR8O8WkRJ/48Y59V0jEDnQfMRQaGiMzBCqqCyM8HfU=; b=QopWB+ZJCkM+6a 9g6HxVu2Hg+YIuKfILf4i8KMkJ5uUcipnRowaO8C9pKK21oBX0LdbMYrnoKgRbgl2NwMQzK0SFFMc kUs/LPkgxkFjjXivvzTo+0PQkrWwFBUZJB07UDUrb/Tt4XIMzztAwAAuN7h+PCvGIjvYOuM5y/Qzn F9fqievJ8RicPNFckpUCkV1A3/D8r9VsyErJy1yxU7y0jly7a6qVw1b/YCWqAac5qY3jPqNv9VHFb qgZsNADD5LwWGasYwnFOvAEYzzna3gz1uS7FJVL8XYISRdOhk8g/cMKYm4c9DBXasjWyGAv2Y+xyf sB5JI52nY1NaWbFEhF+g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h2FJh-0000De-EK; Fri, 08 Mar 2019 13:13:37 +0000 Received: from mx07-00178001.pphosted.com ([62.209.51.94]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h2FIp-0007Vl-MT; Fri, 08 Mar 2019 13:12:46 +0000 Received: from pps.filterd (m0046037.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x28DAlDV012655; Fri, 8 Mar 2019 14:12:39 +0100 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2r3gx52qpp-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 08 Mar 2019 14:12:39 +0100 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 79E5D31; Fri, 8 Mar 2019 13:12:38 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas24.st.com [10.75.90.94]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 4FBD25572; Fri, 8 Mar 2019 13:12:38 +0000 (GMT) Received: from SAFEX1HUBCAS23.st.com (10.75.90.47) by Safex1hubcas24.st.com (10.75.90.94) with Microsoft SMTP Server (TLS) id 14.3.361.1; Fri, 8 Mar 2019 14:12:38 +0100 Received: from lmecxl0923.lme.st.com (10.48.0.237) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.361.1; Fri, 8 Mar 2019 14:12:37 +0100 From: Ludovic Barre To: Mark Brown , Marek Vasut , Boris Brezillon , Rob Herring Subject: [PATCH 2/2] spi: spi-mem: stm32-qspi: add suspend/resume support Date: Fri, 8 Mar 2019 14:12:21 +0100 Message-ID: <1552050741-27739-3-git-send-email-ludovic.Barre@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1552050741-27739-1-git-send-email-ludovic.Barre@st.com> References: <1552050741-27739-1-git-send-email-ludovic.Barre@st.com> MIME-Version: 1.0 X-Originating-IP: [10.48.0.237] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-03-08_11:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190308_051244_019864_ED7A4304 X-CRM114-Status: GOOD ( 13.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Alexandre Torgue , linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, linux-mtd@lists.infradead.org, Ludovic Barre , Maxime Coquelin , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ludovic Barre This patch adds suspend and resume support for spi-stm32-qspi drivers. Signed-off-by: Ludovic Barre --- drivers/spi/spi-stm32-qspi.c | 39 +++++++++++++++++++++++++++++++++++---- 1 file changed, 35 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c index 7354f9d..3e8ca10 100644 --- a/drivers/spi/spi-stm32-qspi.c +++ b/drivers/spi/spi-stm32-qspi.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -101,6 +102,9 @@ struct stm32_qspi { struct completion data_completion; u32 fmode; + u32 cr_reg; + u32 dcr_reg; + /* * to protect device configuration, could be different between * 2 flash access (bk1, bk2) @@ -355,7 +359,7 @@ static int stm32_qspi_setup(struct spi_device *spi) struct spi_controller *ctrl = spi->master; struct stm32_qspi *qspi = spi_controller_get_devdata(ctrl); struct stm32_qspi_flash *flash; - u32 cr, presc; + u32 presc; if (ctrl->busy) return -EBUSY; @@ -371,11 +375,12 @@ static int stm32_qspi_setup(struct spi_device *spi) flash->presc = presc; mutex_lock(&qspi->lock); - cr = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN; - writel_relaxed(cr, qspi->io_base + QSPI_CR); + qspi->cr_reg = FIELD_PREP(CR_FTHRES_MASK, 3) | CR_SSHIFT | CR_EN; + writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR); /* set dcr fsize to max address */ - writel_relaxed(DCR_FSIZE_MASK, qspi->io_base + QSPI_DCR); + qspi->dcr_reg = DCR_FSIZE_MASK; + writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR); mutex_unlock(&qspi->lock); return 0; @@ -489,6 +494,31 @@ static int stm32_qspi_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused stm32_qspi_suspend(struct device *dev) +{ + struct stm32_qspi *qspi = dev_get_drvdata(dev); + + clk_disable_unprepare(qspi->clk); + pinctrl_pm_select_sleep_state(dev); + + return 0; +} + +static int __maybe_unused stm32_qspi_resume(struct device *dev) +{ + struct stm32_qspi *qspi = dev_get_drvdata(dev); + + pinctrl_pm_select_default_state(dev); + clk_prepare_enable(qspi->clk); + + writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR); + writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR); + + return 0; +} + +SIMPLE_DEV_PM_OPS(stm32_qspi_pm_ops, stm32_qspi_suspend, stm32_qspi_resume); + static const struct of_device_id stm32_qspi_match[] = { {.compatible = "st,stm32f469-qspi"}, {} @@ -501,6 +531,7 @@ static struct platform_driver stm32_qspi_driver = { .driver = { .name = "stm32-qspi", .of_match_table = stm32_qspi_match, + .pm = &stm32_qspi_pm_ops, }, }; module_platform_driver(stm32_qspi_driver);