usb: host: ohci-omap: Make it CCF clk API compatible

The driver, OMAP1 specific, now omits clk_prepare/unprepare() steps, not
supported by OMAP1 custom implementation of clock API.  However, non-CCF
stubs of those functions exist for use on such platforms until converted
to CCF.

Update the driver to be compatible with CCF implementation of clock API.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Link: https://lore.kernel.org/r/20220402114353.130775-1-jmkrzyszt@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 45dcf82..2ab2e08 100644 (file)
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -281,6 +281,10 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)
                goto err_put_hcd;
        }
 
+       retval = clk_prepare(priv->usb_host_ck);
+       if (retval)
+               goto err_put_host_ck;
+
        if (!cpu_is_omap15xx())
                priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
        else
@@ -288,13 +292,17 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)
 
        if (IS_ERR(priv->usb_dc_ck)) {
                retval = PTR_ERR(priv->usb_dc_ck);
-               goto err_put_host_ck;
+               goto err_unprepare_host_ck;
        }
 
+       retval = clk_prepare(priv->usb_dc_ck);
+       if (retval)
+               goto err_put_dc_ck;
+
        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
                dev_dbg(&pdev->dev, "request_mem_region failed\n");
                retval = -EBUSY;
-               goto err_put_dc_ck;
+               goto err_unprepare_dc_ck;
        }
 
        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
@@ -319,8 +327,12 @@ err3:
        iounmap(hcd->regs);
 err2:
        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_unprepare_dc_ck:
+       clk_unprepare(priv->usb_dc_ck);
 err_put_dc_ck:
        clk_put(priv->usb_dc_ck);
+err_unprepare_host_ck:
+       clk_unprepare(priv->usb_host_ck);
 err_put_host_ck:
        clk_put(priv->usb_host_ck);
 err_put_hcd:
@@ -355,7 +367,9 @@ static int ohci_hcd_omap_remove(struct platform_device *pdev)
        }
        iounmap(hcd->regs);
        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+       clk_unprepare(priv->usb_dc_ck);
        clk_put(priv->usb_dc_ck);
+       clk_unprepare(priv->usb_host_ck);
        clk_put(priv->usb_host_ck);
        usb_put_hcd(hcd);
        return 0;