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usb: ohci-ep93xx: tidy up driver (*probe) and (*remove) 

Merge the usb_hcd_ep93xx_probe() into ohci_hcd_ep93xx_drv_probe() and
the usb_hcd_ep93xx_remove() into ohci_hcd_ep93xx_drv_remove(). As Alan
Stern pointed out, there is no reason for them to be separate.

Also, as Alan Stern suggested, eliminate the ep93xx_start_hc() and
ep93xx_stop_hc() routines and simply call clk_enable() and clk_disable()
directly. The extra level of redirection does not add any clarity.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-07-01 15:53:02 -07:00 committed by Greg Kroah-Hartman
parent 09ae8e7ead
commit af3f233fd2
1 changed files with 52 additions and 76 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

128
drivers/usb/host/ohci-ep93xx.c
View File

@ -30,74 +30,6 @@
static struct clk *usb_host_clock;
static void ep93xx_start_hc(struct device *dev)
{
clk_enable(usb_host_clock);
}
static void ep93xx_stop_hc(struct device *dev)
{
clk_disable(usb_host_clock);
}
static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct resource *res;
int irq;
int retval;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENXIO;
hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");
if (hcd == NULL)
return -ENOMEM;
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hcd->regs)) {
retval = PTR_ERR(hcd->regs);
goto err_put_hcd;
}
usb_host_clock = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(usb_host_clock)) {
retval = PTR_ERR(usb_host_clock);
goto err_put_hcd;
}
ep93xx_start_hc(&pdev->dev);
ohci_hcd_init(hcd_to_ohci(hcd));
retval = usb_add_hcd(hcd, irq, 0);
if (retval == 0)
return retval;
ep93xx_stop_hc(&pdev->dev);
err_put_hcd:
usb_put_hcd(hcd);
return retval;
}
static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd,
struct platform_device *pdev)
{
usb_remove_hcd(hcd);
ep93xx_stop_hc(&pdev->dev);
usb_put_hcd(hcd);
}
static int ohci_ep93xx_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
@ -138,15 +70,57 @@ static struct hc_driver ohci_ep93xx_hc_driver = {
.start_port_reset = ohci_start_port_reset,
};
extern int usb_disabled(void);
static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct resource *res;
int irq;
int ret;
ret = -ENODEV;
if (!usb_disabled())
ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);
if (usb_disabled())
return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENXIO;
hcd = usb_create_hcd(&ohci_ep93xx_hc_driver, &pdev->dev, "ep93xx");
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hcd->regs)) {
ret = PTR_ERR(hcd->regs);
goto err_put_hcd;
}
usb_host_clock = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(usb_host_clock)) {
ret = PTR_ERR(usb_host_clock);
goto err_put_hcd;
}
clk_enable(usb_host_clock);
ohci_hcd_init(hcd_to_ohci(hcd));
ret = usb_add_hcd(hcd, irq, 0);
if (ret)
goto err_clk_disable;
return 0;
err_clk_disable:
clk_disable(usb_host_clock);
err_put_hcd:
usb_put_hcd(hcd);
return ret;
}
@ -155,7 +129,9 @@ static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_hcd_ep93xx_remove(hcd, pdev);
usb_remove_hcd(hcd);
clk_disable(usb_host_clock);
usb_put_hcd(hcd);
return 0;
}
@ -170,7 +146,7 @@ static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_
msleep(5);
ohci->next_statechange = jiffies;
ep93xx_stop_hc(&pdev->dev);
clk_disable(usb_host_clock);
return 0;
}
@ -183,7 +159,7 @@ static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
msleep(5);
ohci->next_statechange = jiffies;
ep93xx_start_hc(&pdev->dev);
clk_enable(usb_host_clock);
ohci_resume(hcd, false);
return 0;