From patchwork Thu Oct 24 20:18:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Wahren X-Patchwork-Id: 13849677 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3F649D0E415 for ; Thu, 24 Oct 2024 20:33:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; 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b=KZLSTsDxZihnlXirdBa0AQQu2DSslmDJlLNVopdqTNhQm9XMLk63uuEmJ43pIIQw wkf0+C/y3POcLDf2xE+Gj6SGf0JmoK8Spt7IJfZKEWkiEZOY3/J3c+zlKWTFXdG36 RxB4CnL2KZV3xvuSqw9PRCkEfetAKS6zoli0N5k/w6G6GoaPPxk41m2ywLTKIWQw3 aRGTkIqDoSZ+h1mtDD4utQAwEtY6YImjihsQyEcciR4vWYrs19aOOpGc+TzqRWBcR pxr4JC7WMp+hsiqaXV5mPT+nq83ExA80OH2+i3ZOsD9KugyiW3Aq4vHghBCTL3H6k PnfjK7K8zt5hv6TEnw== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from stefanw-SCHENKER ([37.4.248.43]) by mail.gmx.net (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MPXhA-1tGnkz0Eny-00Le1q; Thu, 24 Oct 2024 22:18:47 +0200 From: Stefan Wahren To: Russell King , Florian Fainelli , Ray Jui , Scott Branden , Vinod Koul , Ulf Hansson , Minas Harutyunyan , Greg Kroah-Hartman Cc: Lukas Wunner , Peter Robinson , linux-arm-kernel@lists.infradead.org, kernel-list@raspberrypi.com, bcm-kernel-feedback-list@broadcom.com, dmaengine@vger.kernel.org, linux-mmc@vger.kernel.org, linux-usb@vger.kernel.org, Stefan Wahren Subject: [PATCH 5/9] mmc: bcm2835: add suspend/resume pm support Date: Thu, 24 Oct 2024 22:18:33 +0200 Message-Id: <20241024201837.79927-6-wahrenst@gmx.net> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241024201837.79927-1-wahrenst@gmx.net> References: <20241024201837.79927-1-wahrenst@gmx.net> MIME-Version: 1.0 X-Provags-ID: V03:K1:9TmHXDC8x1toKmQj5TL/zr1r9VxVKXQInUCA3JeqWfeBotHSHp8 wLE1AA0+kLRoWZpFnsyE4ypCh+VDSSwImsj9NpzVERhwNkskidZqyV6e/pwYvPgtjXqqPIN dKF5Cw/6ZqzyERKBCWYhADUJLiDKe+wT6MTyi6A5+uNIl6WlpGZ+RY+ZFRdnWqfhJ1IdpNP J6BA6SqMbLqZ8lwtJFtow== UI-OutboundReport: notjunk:1;M01:P0:bPTh4IaJ1/s=;DvZyp+ul50m2MoJpgBSYoErzoer AbfbZynkrtkr/VN3ylQefl5asCMF01gq+igg96KF6o8g7jl7bfNo8d0xBpVQ05s8QpmOLM2Oy CnmuA+QE+SRGFAhwFRd4+17v5FHfxOcbok9OczzdUDVdosuNY5hsVXa+cQ5o+tqdW1uY69ViY 3/PbVKf8MBtIRQiyJmCOybn87kxd4kgM3Hj4YY4cEcncWh+WpLB3O+xj6kSbzeddMx+Dm2qC4 yW02bi2qa/uOli5uTteIeCdNS5+1ULuFUPZ0bONegz0m/CaE4VRG/pA6N9J1gs0ncIpjE7qLM XQMHBcBkSiD5FNdqO886NQleDowz5/JkDVIKj5732IaAZdjGuPPgXwiUb1NtBLYh5Yiz3Gi3V K+jA+NDX7rAsrq2cVtEZGK8FL8ZEhW3DR4unOGEDHHpJE0FoVT8KUPwrDDGahIbK4r0RZChoq PN5FRDMXc8XjRy3GUEq5HK6oIgJ/tMpoeXoVOv1CKYuii67fvypFxO/7kg/XK94EsoD3wsD9K eCyW7ggaqih3cg5DiQ8CY3ea8zlGVe0FBl+enBhSKObYJF3oqVI/gJtIZZzcBf6HDgl1gr8MK 6vmKR4Qh+bu9Uo0ulgIDyxCic49QrET8p9bPtTTGEkfoFI6pLvwq1mrioVtlp7NjI5RJUl49R KtPDKUgHARqf9J4m89h53uezA1DbUS0qdD1VukTzLZIl4QRch6HLpaDMGud7zwADQMTJ2Saj4 6ZjmHrYPUTgnBSHLAQF+IyNbNX/xzkbdtfrM0yPqG3kGbkTmlQlAIexAgMQYUroEMbJjDCDEd PK8Alhu0VddmoeusWHwUv0mA== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241024_131856_572354_7B797A79 X-CRM114-Status: GOOD ( 11.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a minimalistic suspend/resume PM support. Signed-off-by: Stefan Wahren --- drivers/mmc/host/bcm2835.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) -- 2.34.1 diff --git a/drivers/mmc/host/bcm2835.c b/drivers/mmc/host/bcm2835.c index 107666b7c1c8..17c327b7b5cc 100644 --- a/drivers/mmc/host/bcm2835.c +++ b/drivers/mmc/host/bcm2835.c @@ -1343,6 +1343,30 @@ static int bcm2835_add_host(struct bcm2835_host *host) return 0; } +static int bcm2835_suspend(struct device *dev) +{ + struct bcm2835_host *host = dev_get_drvdata(dev); + + if (!host->data_complete) { + dev_warn(dev, "Suspend is prevented\n"); + return -EBUSY; + } + + clk_disable_unprepare(host->clk); + + return 0; +} + +static int bcm2835_resume(struct device *dev) +{ + struct bcm2835_host *host = dev_get_drvdata(dev); + + return clk_prepare_enable(host->clk); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(bcm2835_pm_ops, bcm2835_suspend, + bcm2835_resume); + static int bcm2835_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1471,6 +1495,7 @@ static struct platform_driver bcm2835_driver = { .name = "sdhost-bcm2835", .probe_type = PROBE_PREFER_ASYNCHRONOUS, .of_match_table = bcm2835_match, + .pm = pm_ptr(&bcm2835_pm_ops), }, }; module_platform_driver(bcm2835_driver);