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This simplifies the code and avoids the calls to clk_disable_unprepare(). Reviewed-by: Alan Stern Signed-off-by: Anand Moon --- v4: Add Rb Alan Stern v3: drop dev_err_probe to simplify the error handle. v2: drop the clk_disable_unprepare in suspend/resume functions fix the usb_put_hcd return before the devm_clk_get_enabled --- drivers/usb/host/ehci-exynos.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c index f644b131cc0b..e2303757bc0f 100644 --- a/drivers/usb/host/ehci-exynos.c +++ b/drivers/usb/host/ehci-exynos.c @@ -159,20 +159,16 @@ static int exynos_ehci_probe(struct platform_device *pdev) err = exynos_ehci_get_phy(&pdev->dev, exynos_ehci); if (err) - goto fail_clk; + goto fail_io; - exynos_ehci->clk = devm_clk_get(&pdev->dev, "usbhost"); + exynos_ehci->clk = devm_clk_get_enabled(&pdev->dev, "usbhost"); if (IS_ERR(exynos_ehci->clk)) { dev_err(&pdev->dev, "Failed to get usbhost clock\n"); err = PTR_ERR(exynos_ehci->clk); - goto fail_clk; + goto fail_io; } - err = clk_prepare_enable(exynos_ehci->clk); - if (err) - goto fail_clk; - hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); if (IS_ERR(hcd->regs)) { err = PTR_ERR(hcd->regs); @@ -223,8 +219,6 @@ static int exynos_ehci_probe(struct platform_device *pdev) exynos_ehci_phy_disable(&pdev->dev); pdev->dev.of_node = exynos_ehci->of_node; fail_io: - clk_disable_unprepare(exynos_ehci->clk); -fail_clk: usb_put_hcd(hcd); return err; } @@ -240,8 +234,6 @@ static void exynos_ehci_remove(struct platform_device *pdev) exynos_ehci_phy_disable(&pdev->dev); - clk_disable_unprepare(exynos_ehci->clk); - usb_put_hcd(hcd); } From patchwork Sun Apr 21 13:47:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Moon X-Patchwork-Id: 13637352 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 96E9E18E3F; 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Sun, 21 Apr 2024 06:48:37 -0700 (PDT) Received: from localhost.localdomain ([113.30.217.222]) by smtp.gmail.com with ESMTPSA id o13-20020a056a001b4d00b006e6c733bde9sm6175043pfv.155.2024.04.21.06.48.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Apr 2024 06:48:37 -0700 (PDT) From: Anand Moon To: Alan Stern , Greg Kroah-Hartman , Krzysztof Kozlowski , Alim Akhtar Cc: Anand Moon , Christophe JAILLET , Johan Hovold , Thinh Nguyen , linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 2/5] usb: ehci-exynos: Use DEFINE_SIMPLE_DEV_PM_OPS for PM functions Date: Sun, 21 Apr 2024 19:17:31 +0530 Message-ID: <20240421134752.2652-3-linux.amoon@gmail.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240421134752.2652-1-linux.amoon@gmail.com> References: <20240421134752.2652-1-linux.amoon@gmail.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Use DEFINE_SIMPLE_DEV_PM_OPS macro to progressively switch from a code model where PM callbacks are all protected behind CONFIG_PM guards, to a code model where the PM callbacks are always seen by the compiler, but discarded if not used. Reviewed-by: Alan Stern Signed-off-by: Anand Moon --- v4: rephrase commit message add reviewed by RB Alan Stern v3: fix using new DEFINE_SIMPLE_DEV_PM_OPS PM macro hence change the $subject and the commit message v2: add __maybe_unused to suspend/resume functions in case CONFIG_PM is disabled. --- drivers/usb/host/ehci-exynos.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c index e2303757bc0f..f40bc2a7a124 100644 --- a/drivers/usb/host/ehci-exynos.c +++ b/drivers/usb/host/ehci-exynos.c @@ -237,7 +237,6 @@ static void exynos_ehci_remove(struct platform_device *pdev) usb_put_hcd(hcd); } -#ifdef CONFIG_PM static int exynos_ehci_suspend(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); @@ -280,15 +279,9 @@ static int exynos_ehci_resume(struct device *dev) ehci_resume(hcd, false); return 0; } -#else -#define exynos_ehci_suspend NULL -#define exynos_ehci_resume NULL -#endif -static const struct dev_pm_ops exynos_ehci_pm_ops = { - .suspend = exynos_ehci_suspend, - .resume = exynos_ehci_resume, -}; 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Sun, 21 Apr 2024 06:48:44 -0700 (PDT) Received: from localhost.localdomain ([113.30.217.222]) by smtp.gmail.com with ESMTPSA id o13-20020a056a001b4d00b006e6c733bde9sm6175043pfv.155.2024.04.21.06.48.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Apr 2024 06:48:44 -0700 (PDT) From: Anand Moon To: Alan Stern , Greg Kroah-Hartman , Krzysztof Kozlowski , Alim Akhtar Cc: Anand Moon , Christophe JAILLET , Johan Hovold , Thinh Nguyen , linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 3/5] usb: ohci-exynos: Use devm_clk_get_enabled() helpers Date: Sun, 21 Apr 2024 19:17:32 +0530 Message-ID: <20240421134752.2652-4-linux.amoon@gmail.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240421134752.2652-1-linux.amoon@gmail.com> References: <20240421134752.2652-1-linux.amoon@gmail.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The devm_clk_get_enabled() helpers: - call devm_clk_get() - call clk_prepare_enable() and register what is needed in order to call clk_disable_unprepare() when needed, as a managed resource. This simplifies the code and avoids the calls to clk_disable_unprepare(). Reviewed-by: Alan Stern Signed-off-by: Anand Moon --- v4 : Add reviewed by Alan Stern v3: drop dev_err_probe to simplify the error handle. v2: new patch in this series --- drivers/usb/host/ohci-exynos.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c index 20e26a474591..89e6587c089b 100644 --- a/drivers/usb/host/ohci-exynos.c +++ b/drivers/usb/host/ohci-exynos.c @@ -135,20 +135,16 @@ static int exynos_ohci_probe(struct platform_device *pdev) err = exynos_ohci_get_phy(&pdev->dev, exynos_ohci); if (err) - goto fail_clk; + goto fail_io; - exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost"); + exynos_ohci->clk = devm_clk_get_enabled(&pdev->dev, "usbhost"); if (IS_ERR(exynos_ohci->clk)) { dev_err(&pdev->dev, "Failed to get usbhost clock\n"); err = PTR_ERR(exynos_ohci->clk); - goto fail_clk; + goto fail_io; } - err = clk_prepare_enable(exynos_ohci->clk); - if (err) - goto fail_clk; - hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 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Sun, 21 Apr 2024 06:48:51 -0700 (PDT) Received: from localhost.localdomain ([113.30.217.222]) by smtp.gmail.com with ESMTPSA id o13-20020a056a001b4d00b006e6c733bde9sm6175043pfv.155.2024.04.21.06.48.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Apr 2024 06:48:51 -0700 (PDT) From: Anand Moon To: Alan Stern , Greg Kroah-Hartman , Krzysztof Kozlowski , Alim Akhtar Cc: Anand Moon , Christophe JAILLET , Johan Hovold , Thinh Nguyen , linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 4/5] usb: ohci-exynos: Use DEFINE_SIMPLE_DEV_PM_OPS for PM functions Date: Sun, 21 Apr 2024 19:17:33 +0530 Message-ID: <20240421134752.2652-5-linux.amoon@gmail.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240421134752.2652-1-linux.amoon@gmail.com> References: <20240421134752.2652-1-linux.amoon@gmail.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Use DEFINE_SIMPLE_DEV_PM_OPS macro to progressively switch from a code model where PM callbacks are all protected behind CONFIG_PM guards, to a code model where the PM callbacks are always seen by the compiler, but discarded if not used. Reviewed-by: Alan Stern Signed-off-by: Anand Moon --- v4: rephrase commit message add reviewed by RB Alan Stern v3: fix using new DEFINE_SIMPLE_DEV_PM_OPS PM macro hence change the $subject and the commit message v2: add __maybe_unused to suspend/resume functions in case CONFIG_PM is disabled. --- drivers/usb/host/ohci-exynos.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c index 89e6587c089b..3c4d68fd5c33 100644 --- a/drivers/usb/host/ohci-exynos.c +++ b/drivers/usb/host/ohci-exynos.c @@ -213,7 +213,6 @@ static void exynos_ohci_shutdown(struct platform_device *pdev) hcd->driver->shutdown(hcd); } -#ifdef CONFIG_PM static int exynos_ohci_suspend(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); @@ -250,19 +249,13 @@ static int exynos_ohci_resume(struct device *dev) return 0; } -#else -#define exynos_ohci_suspend NULL -#define exynos_ohci_resume NULL -#endif static const struct ohci_driver_overrides exynos_overrides __initconst = { .extra_priv_size = sizeof(struct exynos_ohci_hcd), }; 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Sun, 21 Apr 2024 06:48:57 -0700 (PDT) Received: from localhost.localdomain ([113.30.217.222]) by smtp.gmail.com with ESMTPSA id o13-20020a056a001b4d00b006e6c733bde9sm6175043pfv.155.2024.04.21.06.48.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Apr 2024 06:48:57 -0700 (PDT) From: Anand Moon To: Thinh Nguyen , Greg Kroah-Hartman , Krzysztof Kozlowski , Alim Akhtar Cc: Anand Moon , Christophe JAILLET , Johan Hovold , linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 5/5] usb: dwc3: exynos: Use DEFINE_SIMPLE_DEV_PM_OPS for PM functions Date: Sun, 21 Apr 2024 19:17:34 +0530 Message-ID: <20240421134752.2652-6-linux.amoon@gmail.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240421134752.2652-1-linux.amoon@gmail.com> References: <20240421134752.2652-1-linux.amoon@gmail.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This macro has the advantage over SET_SYSTEM_SLEEP_PM_OPS that we don't have to care about when the functions are actually used. Also make use of pm_sleep_ptr() to discard all PM_SLEEP related stuff if CONFIG_PM_SLEEP isn't enabled. Acked-by: Thinh Nguyen Signed-off-by: Anand Moon --- v4 Fix typo in commit message SIMPLE_DEV_PM_OPS to SET_SYSTEM_SLEEP_PM_OPS Add Acked by Thinh Nguyen v3: fix using new DEFINE_SIMPLE_DEV_PM_OPS PM macro hence change the $subject and the commit message v2: add __maybe_unused to suspend/resume functions in case CONFIG_PM is disabled. --- drivers/usb/dwc3/dwc3-exynos.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c index 5d365ca51771..3427522a7c6a 100644 --- a/drivers/usb/dwc3/dwc3-exynos.c +++ b/drivers/usb/dwc3/dwc3-exynos.c @@ -187,7 +187,6 @@ static const struct of_device_id exynos_dwc3_match[] = { }; MODULE_DEVICE_TABLE(of, exynos_dwc3_match); -#ifdef CONFIG_PM_SLEEP static int dwc3_exynos_suspend(struct device *dev) { struct dwc3_exynos *exynos = dev_get_drvdata(dev); @@ -230,14 +229,8 @@ static int dwc3_exynos_resume(struct device *dev) return 0; } -static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume) -}; - -#define DEV_PM_OPS (&dwc3_exynos_dev_pm_ops) -#else -#define DEV_PM_OPS NULL -#endif /* CONFIG_PM_SLEEP */ +static DEFINE_SIMPLE_DEV_PM_OPS(dwc3_exynos_dev_pm_ops, + dwc3_exynos_suspend, dwc3_exynos_resume); static struct platform_driver dwc3_exynos_driver = { .probe = dwc3_exynos_probe, @@ -245,7 +238,7 @@ static struct platform_driver dwc3_exynos_driver = { .driver = { .name = "exynos-dwc3", .of_match_table = exynos_dwc3_match, - .pm = DEV_PM_OPS, + .pm = pm_sleep_ptr(&dwc3_exynos_dev_pm_ops), }, };