ehci-platform: add pre_setup() method to platform data

Sometimes there is a need  to initialize some non-standard registers mapped to
the EHCI region before accessing the standard EHCI registers.  Add pre_setup()
method with 'struct usb_hcd *' parameter to be called just before ehci_setup()
to the 'ehci-platform'  driver's platform data for this purpose...

While at it, add the missing incomplete declaration of 'struct platform_device'
to <linux/usb/ehci_pdriver.h>...

The patch has been tested on the Marzen and BOCK-W boards.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index f47f2594c9d4..d1f5cea435aa 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -48,6 +48,12 @@ static int ehci_platform_reset(struct usb_hcd *hcd)
         ehci->big_endian_desc = pdata->big_endian_desc;
         ehci->big_endian_mmio = pdata->big_endian_mmio;
 
+        if (pdata->pre_setup) {
+                retval = pdata->pre_setup(hcd);
+                if (retval < 0)
+                        return retval;
+        }
+
         ehci->caps = hcd->regs + pdata->caps_offset;
         retval = ehci_setup(hcd);
         if (retval)