usb: ohci-nxp: Use helper function devm_clk_get_enabled()

devm_clk_get() and clk_prepare_enable() can be replaced by helper
function devm_clk_get_enabled(). Let's use devm_clk_get_enabled() to
simplify code and avoid calling clk_disable_unprepare().

Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20240902123020.29267-3-zhangzekun11@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ohci-nxp.c b/drivers/usb/host/ohci-nxp.c
index 8264c454f6bddfb448d3d7e8d0031865b93fa50f..5b775e1ea52707fee7a302f47c379a2cadad857a 100644 (file)
--- a/drivers/usb/host/ohci-nxp.c
+++ b/drivers/usb/host/ohci-nxp.c
@@ -51,8 +51,6 @@ static struct hc_driver __read_mostly ohci_nxp_hc_driver;
 
 static struct i2c_client *isp1301_i2c_client;
 
-static struct clk *usb_host_clk;
-
 static void isp1301_configure_lpc32xx(void)
 {
        /* LPC32XX only supports DAT_SE0 USB mode */
@@ -155,6 +153,7 @@ static int ohci_hcd_nxp_probe(struct platform_device *pdev)
        struct resource *res;
        int ret = 0, irq;
        struct device_node *isp1301_node;
+       struct clk *usb_host_clk;
 
        if (pdev->dev.of_node) {
                isp1301_node = of_parse_phandle(pdev->dev.of_node,
@@ -180,26 +179,20 @@ static int ohci_hcd_nxp_probe(struct platform_device *pdev)
        }
 
        /* Enable USB host clock */
-       usb_host_clk = devm_clk_get(&pdev->dev, NULL);
+       usb_host_clk = devm_clk_get_enabled(&pdev->dev, NULL);
        if (IS_ERR(usb_host_clk)) {
-               dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
+               dev_err(&pdev->dev, "failed to acquire and start USB OHCI clock\n");
                ret = PTR_ERR(usb_host_clk);
                goto fail_disable;
        }
 
-       ret = clk_prepare_enable(usb_host_clk);
-       if (ret < 0) {
-               dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
-               goto fail_disable;
-       }
-
        isp1301_configure();
 
        hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
        if (!hcd) {
                dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
                ret = -ENOMEM;
-               goto fail_hcd;
+               goto fail_disable;
        }
 
        hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
@@ -229,8 +222,6 @@ static int ohci_hcd_nxp_probe(struct platform_device *pdev)
        ohci_nxp_stop_hc();
 fail_resource:
        usb_put_hcd(hcd);
-fail_hcd:
-       clk_disable_unprepare(usb_host_clk);
 fail_disable:
        isp1301_i2c_client = NULL;
        return ret;
@@ -243,7 +234,6 @@ static void ohci_hcd_nxp_remove(struct platform_device *pdev)
        usb_remove_hcd(hcd);
        ohci_nxp_stop_hc();
        usb_put_hcd(hcd);
-       clk_disable_unprepare(usb_host_clk);
        isp1301_i2c_client = NULL;
 }