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: 13849638 Received: from mout.gmx.net (mout.gmx.net [212.227.15.15]) (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 88460189F5E; Thu, 24 Oct 2024 20:19:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.15.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729801147; cv=none; b=C+rHZKqWybBfd0rWic0AlaN6bEmK4dZcaC0rOGhQZYorJQ+sr4IRQarxn67aCSpPoWdZLXjZStBgEqJ6tV09yTDCL6Pj/c8IauhS4QIf82U/SmVI/0kQn6mdeuyjc4l52rZ9FSdSCOKpdJhVwZz306mR/MS4SZJtvZyMf98OG7o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729801147; c=relaxed/simple; bh=nDW0JkC5oOVw3y6HyHxt9mKYcZxpXMokS2HNemOLjZ4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=oeIf5HhsnqOGMZu4HcqcL/Tm/jGIXvPbc9wmhX0dqSAfjSOAD8MyndoIlV6wjghOZFzkpJRROu0lrKzetYwYRbabzbUns9zAWEJvuPSaUoinKLVFH2srNz0uPNVOKPH5Zr32HNSEHndSPxHI9ZGybluILfzHtpnqIerr25JdzRo= 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=KZLSTsDx; arc=none smtp.client-ip=212.227.15.15 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="KZLSTsDx" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.net; s=s31663417; t=1729801127; x=1730405927; 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=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> Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Provags-ID: V03:K1:9TmHXDC8x1toKmQj5TL/zr1r9VxVKXQInUCA3JeqWfeBotHSHp8 wLE1AA0+kLRoWZpFnsyE4ypCh+VDSSwImsj9NpzVERhwNkskidZqyV6e/pwYvPgtjXqqPIN dKF5Cw/6ZqzyERKBCWYhADUJLiDKe+wT6MTyi6A5+uNIl6WlpGZ+RY+ZFRdnWqfhJ1IdpNP J6BA6SqMbLqZ8lwtJFtow== X-Spam-Flag: NO 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== 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);