From patchwork Fri Oct 25 10:36:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Wahren X-Patchwork-Id: 13850458 Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF9811D5CE5; Fri, 25 Oct 2024 10:36:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.17.22 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729852615; cv=none; b=iIZQR7HQ13PkQneRI2xs3eJS8o+EPpM5zJslVCt4bzD49+U/nehOTbjvIJDkeMfjFJ6Fu+/HPH6xWPWFANbOfg/1ihxsusTH3NgXliJJR82hwWxHkhkwupGwv901YEcZdWKrNKoIFmtdFdP/KykM/0Tdm7nPVx3xRyYXgzSlXYA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729852615; c=relaxed/simple; bh=nDW0JkC5oOVw3y6HyHxt9mKYcZxpXMokS2HNemOLjZ4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=dA8nWlWubuYFwyGPJeXgwnYt6dRe1v7m10ma+TvtPMGq6uXY2c5hWXqenfUcmlOVgMaKrvz2jQ5dAenGmFg80I6g+pwdgpEOSWpUFDa+KR4yzulonSlxmN0bHv44jS6DG8B7ziYJMgYHThB56ifg/LE968IsbaSTCVWeSJ57H6g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.net; spf=pass smtp.mailfrom=gmx.net; dkim=pass (2048-bit key) header.d=gmx.net header.i=wahrenst@gmx.net header.b=OMfN+BJ3; arc=none smtp.client-ip=212.227.17.22 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmx.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmx.net header.i=wahrenst@gmx.net header.b="OMfN+BJ3" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.net; s=s31663417; t=1729852594; x=1730457394; i=wahrenst@gmx.net; bh=7SJXJq2uX1cxKxMjslAAHJO+ZqjPnNq4UxpqnQBoZXU=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:Message-Id:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding:cc: content-transfer-encoding:content-type:date:from:message-id: mime-version:reply-to:subject:to; b=OMfN+BJ3jEVar7Z9mM3x0Iqs1yFDb76xD9fFjkO+EoKsIGoZgHX7RItOBVtWl7ro mLUjivfa4hADRkUN36kIeSWws9iGwsiidjSEi6Oeq5tYTcpJSJlCFbkOCyLxMZbqo +/aqWop9S+NWSd3G0zKJrlPxyb6DhYGGNwFfu4qNydwU4+z9G/GTnoTYNka+13Lbz 5z7aahp9T1nkP9EpdWWS62VCRD4tDWvF6wo+UCG9StkZWJvFNup0y4b5HzmbLB7Xm 6W8krDDtpxjYBJzqwrOHCcfQ9hMymGPKWfwz3Ygdug4g5EccEdcOIqXkTlF56Zx2k WbzRkd5TMSpo+kTXOw== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from stefanw-SCHENKER ([37.4.248.43]) by mail.gmx.net (mrgmx104 [212.227.17.168]) with ESMTPSA (Nemesis) id 1N8GMq-1tzUtF3bd2-00wFqO; Fri, 25 Oct 2024 12:36:34 +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 , "Ivan T . Ivanov" , 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 V5 5/9] mmc: bcm2835: add suspend/resume pm support Date: Fri, 25 Oct 2024 12:36:17 +0200 Message-Id: <20241025103621.4780-6-wahrenst@gmx.net> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241025103621.4780-1-wahrenst@gmx.net> References: <20241025103621.4780-1-wahrenst@gmx.net> Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Provags-ID: V03:K1:r6awQYunqIyfua3c0UOjHK0bzNoQpAtzd9ESDD3nUHWFOjq7NEV mK0a9d7j6jmP5GdgWNB6Y6bjTvlxAuNg1US/ywe2ZJ0IqMJz3bLkWAN8ciNrQHNwIJftSED WLpLEFG0ZesznqsbjvHuTEfyijajuo0UwU1bQkyjixUIk7dQSLB6Vj4z2Lty/g8L1qiDlqq HM9fUjoxFMdog4tU43dzw== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:zvRF6oIdmeA=;EnW4FddaoRaUIEDasz8kgcQp10d wYPzFPZyHuuO5FHks02gX3Zr5ckD2sNRvkDtYDNe9pdoiwqkQsVdRAJ3XA5zILrMhl86BsKq5 J5ODpCTnFPejaB6np1zMyhFZBFMPBFekihvnYlV7S0XDyYzZx06b+hFWVbJaDhYSnUkJ+8K+S nRnNNJpAq/OhtuS9S14mPQ5e/Y7Kn/56XUvzNWLe6ZS4YuzcGpPUKE8SSX4BHN9PWQxYW4dlX O34UUhooQahnyjt34DI6FlelxrTg5mdOclcOoKzgD/OKhJc8MArhfYx7zctqz1piCJKWqn7WQ fEv6d/C3c5IXwEK3ao7ic2lfxg5baGjius11pEBUUxp9vLuJU9zbqLTtMtUAD6jr2X2fW1cWg s9NISyjuibxiiBtg+gq7anJirFnxQiRhQ5eeJOVgpZ9dF01c3F/zh46nniyVG/hacWVfBbCxw bm4lH/7jb3gnOnaFNsBHJRLnvnAHIuRVa6/rdpnfHTFxQDnkNRfWuBBlSUsHfTjJ35sJyub0f 0+b3Sgr5Fkghwm+sFKCEhl2Zsdbzr7TEJZdVi16AnqUTtc4Qwq1vy0Q1To72XnfWCfio9EZVj oKMo0Z6LOXqEELdoYx8j6YNhIYiHx86uzTVg6Xn3+LjMByb+h3Qcu6EdDypfmhMi1XtzXdPDH WTkdgv9NDLfKCMzWYy2hAxmiBb5qVgqUIsSK5dtmXUvSBLaO5dxHRbRDckrNriP2yu3j+6CLe Eisi4HIiulLdIlAE+Z/rkQe+osJs/S8Cm5ZhUnRGy/83FIOIx/8ll/uo/blaBHml0JSudYFsf 5ZhOdB53DQ91gcy2LsfUXOYg== 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);