From patchwork Sun Aug 25 03:54:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 13776538 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 4DE30C5472D for ; Sun, 25 Aug 2024 03:55:53 +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: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:In-Reply-To:References:List-Owner; bh=USvsLmNu2/MMrUgY+emHYMuQ+S74Sb6oHGMumsHYhoA=; b=iIbsZ3dktEZ670cKaxBWgAMyBL f1hI636d8MPh1EQkPUlcwQxzJFd7OD8g10PFsVzlWEBeuVbMRZnBKlBQw8YVy87Uf1fXgTTGF8oqd fxjsAuXJc7EUBpjGl87kFUVl8sHcSp3mF8Jom15/+i+6jekyNUCAjkCz4Owke2OVTWzS/f4EXndBc il22ll1gtv8YygOd5qkWApU5cjztIOEbwL5z1Oi0FA0JQnimG7woouXz7BjJ6a5uGfuqrkj8ZEoDZ +DMxFCHtfZcBTxQgLL2v6185Dq+Vqm8uVj2kzRe2DyU+Fm9oh4x7yoNeI9TR4WNLPeaOxJbS66zg/ QpgtQgtA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1si4Lq-00000003U9b-2YMz; Sun, 25 Aug 2024 03:55:38 +0000 Received: from mail-m1019.netease.com ([154.81.10.19]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1si4L4-00000003U3K-2N1R; Sun, 25 Aug 2024 03:54:52 +0000 DKIM-Signature: a=rsa-sha256; b=VYa0Yt98s0Rumgcmipid52XzFr4FclL8Z8e2rig7JJAGAvHrXCuld7IUKXJYwb7bySUldK1r8Bca2SE4/wNGj+FZ4wusQuEMSJ7VykbHZ+8bG5XKhns8uu0xeraOToXzXDwKQMOBuNP08vS/Of/rfPoV31oVJmUrQhxHN0HL7S8=; s=default; c=relaxed/relaxed; d=rock-chips.com; v=1; bh=USvsLmNu2/MMrUgY+emHYMuQ+S74Sb6oHGMumsHYhoA=; h=date:mime-version:subject:message-id:from; Received: from rockchip.. (unknown [58.22.7.114]) by smtp.qiye.163.com (Hmail) with ESMTPA id 0ED5B6E07EB; Sun, 25 Aug 2024 11:54:25 +0800 (CST) From: Jon Lin To: briannorris@chromium.org, broonie@kernel.org Cc: linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, heiko@sntech.de, jon.lin@rock-chips.com, linux-arm-kernel@lists.infradead.org, linux-spi@vger.kernel.org Subject: [PATCH] spi: rockchip: Avoid redundant clock disable in pm operation Date: Sun, 25 Aug 2024 11:54:22 +0800 Message-Id: <20240825035422.900370-1-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFDSUNOT01LS0k3V1ktWUFJV1kPCRoVCBIfWUFZGUNMSlZIGE5ISUIYH0seSBpWFRQJFh oXVRMBExYaEhckFA4PWVdZGBILWUFZTkNVSUlVTFVKSk9ZV1kWGg8SFR0UWUFZT0tIVUpLSU9PT0 hVSktLVUpCS0tZBg++ X-HM-Tid: 0a9187abbf3609d5kunm0ed5b6e07eb X-HM-MType: 1 X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6Ni46PAw4TTI6SxkTETI8Tigz EAgKCyhVSlVKTElPTk5DS01OQktIVTMWGhIXVREUFVUXEhU7CRQYEFYYExILCFUYFBZFWVdZEgtZ QVlOQ1VJSVVMVUpKT1lXWQgBWUFPTEhDNwY+ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240824_205451_139583_7BC5B058 X-CRM114-Status: GOOD ( 11.68 ) 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 Fix WARN_ON: [ 22.869352][ T1885] clk_spi0 already unprepared [ 22.869379][ T1885] WARNING: CPU: 3 PID: 1885 at drivers/clk/clk.c:813 clk_core_unprepare+0xbc4 [ 22.869380][ T1885] Modules linked in: bcmdhd dhd_static_buf [ 22.869391][ T1885] CPU: 3 PID: 1885 Comm: Binder:355_2 Tainted: G W 5.10.66 #59 [ 22.869393][ T1885] Hardware name: Rockchip RK3588 EVB1 LP4 V10 Board (DT) [ 22.869397][ T1885] pstate: 60400009 (nZCv daif +PAN -UAO -TCO BTYPE=--) [ 22.869401][ T1885] pc : clk_core_unprepare+0xbc/0x214 [ 22.869404][ T1885] lr : clk_core_unprepare+0xbc/0x214 Fixes: e882575efc77 ("spi: rockchip: Suspend and resume the bus during NOIRQ_SYSTEM_SLEEP_PM ops") Signed-off-by: Jon Lin --- drivers/spi/spi-rockchip.c | 57 +++++++++++++++++--------------------- 1 file changed, 26 insertions(+), 31 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index e1ecd96c7858..043a7739c330 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -940,33 +940,24 @@ static void rockchip_spi_remove(struct platform_device *pdev) spi_controller_put(ctlr); } -#ifdef CONFIG_PM_SLEEP -static int rockchip_spi_suspend(struct device *dev) +#ifdef CONFIG_PM +static int rockchip_spi_runtime_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; - clk_disable_unprepare(rs->spiclk); clk_disable_unprepare(rs->apb_pclk); - pinctrl_pm_select_sleep_state(dev); - return 0; } -static int rockchip_spi_resume(struct device *dev) +static int rockchip_spi_runtime_resume(struct device *dev) { int ret; struct spi_controller *ctlr = dev_get_drvdata(dev); struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); - pinctrl_pm_select_default_state(dev); - ret = clk_prepare_enable(rs->apb_pclk); if (ret < 0) return ret; @@ -975,41 +966,45 @@ static int rockchip_spi_resume(struct device *dev) if (ret < 0) clk_disable_unprepare(rs->apb_pclk); - ret = spi_controller_resume(ctlr); - if (ret < 0) { - clk_disable_unprepare(rs->spiclk); - clk_disable_unprepare(rs->apb_pclk); - } - return 0; } -#endif /* CONFIG_PM_SLEEP */ +#endif /* CONFIG_PM */ -#ifdef CONFIG_PM -static int rockchip_spi_runtime_suspend(struct device *dev) +#ifdef CONFIG_PM_SLEEP +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); - clk_disable_unprepare(rs->spiclk); - clk_disable_unprepare(rs->apb_pclk); + ret = spi_controller_suspend(ctlr); + if (ret < 0) + return ret; + + /* Avoid redundant clock disable */ + if (!pm_runtime_status_suspended(dev)) + rockchip_spi_runtime_suspend(dev); + + pinctrl_pm_select_sleep_state(dev); return 0; } -static int rockchip_spi_runtime_resume(struct device *dev) +static int rockchip_spi_resume(struct device *dev) { int ret; struct spi_controller *ctlr = dev_get_drvdata(dev); - struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); - ret = clk_prepare_enable(rs->apb_pclk); - if (ret < 0) - return ret; + pinctrl_pm_select_default_state(dev); - ret = clk_prepare_enable(rs->spiclk); + if (!pm_runtime_status_suspended(dev)) { + ret = rockchip_spi_runtime_resume(dev); + if (ret < 0) + return ret; + } + + ret = spi_controller_resume(ctlr); if (ret < 0) - clk_disable_unprepare(rs->apb_pclk); + rockchip_spi_runtime_suspend(dev); return 0; }