From: Anand Moon <linux.amoon@gmail.com>
To: Alan Stern <stern@rowland.harvard.edu>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Alim Akhtar <alim.akhtar@samsung.com>
Cc: Anand Moon <linux.amoon@gmail.com>,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
Johan Hovold <johan@kernel.org>,
Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 1/5] usb: ehci-exynos: Use devm_clk_get_enabled() helpers
Date: Fri, 12 Apr 2024 19:52:50 +0530 [thread overview]
Message-ID: <20240412142317.5191-2-linux.amoon@gmail.com> (raw)
In-Reply-To: <20240412142317.5191-1-linux.amoon@gmail.com>
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().
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
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);
}
--
2.44.0
next parent reply other threads:[~2024-04-12 14:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20240412142317.5191-1-linux.amoon@gmail.com>
2024-04-12 14:22 ` Anand Moon [this message]
2024-04-12 14:58 ` [PATCH v3 1/5] usb: ehci-exynos: Use devm_clk_get_enabled() helpers Alan Stern
2024-04-12 14:22 ` [PATCH v3 2/5] usb: ehci-exynos: Use DEFINE_SIMPLE_DEV_PM_OPS for PM functions Anand Moon
2024-04-12 14:22 ` [PATCH v3 3/5] usb: ohci-exynos: Use devm_clk_get_enabled() helpers Anand Moon
2024-04-12 14:22 ` [PATCH v3 4/5] usb: ohci-exynos: Use DEFINE_SIMPLE_DEV_PM_OPS for PM functions Anand Moon
2024-04-12 14:22 ` [PATCH v3 5/5] usb: dwc3: exynos: " Anand Moon
2024-04-16 0:44 ` Thinh Nguyen
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