From patchwork Fri Feb 11 03:49:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 12742832 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 EAB5AC433F5 for ; Fri, 11 Feb 2022 03:54:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=FR2ulKrEWDCLysfAaTtesq/ixT5vytQW3E4dLcIebbY=; b=m7mHaAkpAYvtyI GX5N4BXQ5htUDAyMWfOp+YqnUU5VHX4DLB+if4S79bM4GisK1/TdMPE7xlp+oKCtraMADGWWuL0n+ C49ROVnztpFtw6smgw4YRh26qwbbigtfG1A4D9wIuME5EU+xRHzUo8ZL9t/GvDBXVkgYwZw5aOxvj tUqyT1i4W/oU6q0rtx88XGD30IWla+vUakBZpZtUc/ztitHR4a7/A6fjp+PkLUt12RAXqQvNI4Gnp gRf7HDYaiCwUXBcFItyhSLJRCDIscJ6L1HUOUlXwQgmeHvF2HjgK7W/otFilJeIh4SXpyIZ6ErULb 9gxAi1f+IWwDjibsFiFQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nIMzZ-005fz9-RC; Fri, 11 Feb 2022 03:53:06 +0000 Received: from mail-m17664.qiye.163.com ([59.111.176.64]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nIMwQ-005ePS-ID; Fri, 11 Feb 2022 03:49:58 +0000 Received: from localhost.localdomain (unknown [58.22.7.114]) by mail-m17664.qiye.163.com (Hmail) with ESMTPA id 91E471401FA; Fri, 11 Feb 2022 11:49:48 +0800 (CST) From: Jon Lin To: broonie@kernel.org Cc: heiko@sntech.de, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, shengfei Xu , Jon Lin Subject: [RFC PATCH v1 4/6] spi: rockchip: Suspend and resume the bus during NOIRQ_SYSTEM_SLEEP_PM ops Date: Fri, 11 Feb 2022 11:49:36 +0800 Message-Id: <20220211034938.25097-5-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220211034938.25097-1-jon.lin@rock-chips.com> References: <20220211034938.25097-1-jon.lin@rock-chips.com> X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgPGg8OCBgUHx5ZQUlOS1dZCBgUCR5ZQVlLVUtZV1 kWDxoPAgseWUFZKDYvK1lXWShZQUhPN1dZLVlBSVdZDwkaFQgSH1lBWUJLQ0lWGB1KTEsaGUhDHx 5CVRMBExYaEhckFA4PWVdZFhoPEhUdFFlBWVVLWQY+ X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6M006Czo5OD5LEh46TU8tDT45 Hy5PCVFVSlVKTU9PTk5KSENCS0hLVTMWGhIXVREUFVUXEhU7CRQYEFYYExILCFUYFBZFWVdZEgtZ QVlOQ1VJSVVMVUpKT1lXWQgBWUFISkxMNwY+ X-HM-Tid: 0a7ee6e6be74da2fkuws91e471401fa X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220210_194950_833116_7884FD12 X-CRM114-Status: GOOD ( 12.20 ) 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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: shengfei Xu the wakeup interrupt handler which is guaranteed not to run while @resume noirq() is being executed. the patch can help to avoid the wakeup source try to access spi when the spi is in suspend mode. Signed-off-by: shengfei Xu Signed-off-by: Jon Lin --- drivers/spi/spi-rockchip.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 5f6a70664871..5457af616a44 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -959,14 +959,14 @@ static int rockchip_spi_suspend(struct device *dev) { int ret; struct spi_controller *ctlr = dev_get_drvdata(dev); + struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); ret = spi_controller_suspend(ctlr); if (ret < 0) return ret; - ret = pm_runtime_force_suspend(dev); - if (ret < 0) - return ret; + clk_disable_unprepare(rs->spiclk); + clk_disable_unprepare(rs->apb_pclk); pinctrl_pm_select_sleep_state(dev); @@ -981,10 +981,14 @@ static int rockchip_spi_resume(struct device *dev) pinctrl_pm_select_default_state(dev); - ret = pm_runtime_force_resume(dev); + ret = clk_prepare_enable(rs->apb_pclk); if (ret < 0) return ret; + ret = clk_prepare_enable(rs->spiclk); + if (ret < 0) + clk_disable_unprepare(rs->apb_pclk); + ret = spi_controller_resume(ctlr); if (ret < 0) { clk_disable_unprepare(rs->spiclk); @@ -1026,7 +1030,7 @@ static int rockchip_spi_runtime_resume(struct device *dev) #endif /* CONFIG_PM */ static const struct dev_pm_ops rockchip_spi_pm = { - SET_SYSTEM_SLEEP_PM_OPS(rockchip_spi_suspend, rockchip_spi_resume) + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(rockchip_spi_suspend, rockchip_spi_resume) SET_RUNTIME_PM_OPS(rockchip_spi_runtime_suspend, rockchip_spi_runtime_resume, NULL) };