Sometimes there is a need to initialize some non-standard registers mapped to
the EHCI region before accessing the standard EHCI registers. Add the init()
method to the 'ehci-platform' platform data for this purpose.
Suggested-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-platform.c | 7 +++++++
include/linux/usb/ehci_pdriver.h | 1 +
2 files changed, 8 insertions(+)
Index: renesas/drivers/usb/host/ehci-platform.c
===================================================================
--- renesas.orig/drivers/usb/host/ehci-platform.c
+++ renesas/drivers/usb/host/ehci-platform.c
@@ -110,6 +110,13 @@ static int ehci_platform_probe(struct pl
err = PTR_ERR(hcd->regs);
goto err_put_hcd;
}
+
+ if (pdata->init) {
+ err = pdata->init(dev, hcd->regs);
+ if (err < 0)
+ goto err_put_hcd;
+ }
+
err = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (err)
goto err_put_hcd;
Index: renesas/include/linux/usb/ehci_pdriver.h
===================================================================
--- renesas.orig/include/linux/usb/ehci_pdriver.h
+++ renesas/include/linux/usb/ehci_pdriver.h
@@ -50,6 +50,7 @@ struct usb_ehci_pdata {
/* Turn on only VBUS suspend power and hotplug detection,
* turn off everything else */
void (*power_suspend)(struct platform_device *pdev);
+ int (*init)(struct platform_device *pdev, void __iomem *regs);
};
#endif /* __USB_CORE_EHCI_PDRIVER_H */
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