Commit:     5f629ad7e5f9b99c6d025bf199d402734bd72d0f
Parent:     8802bca4feed9e60d22a91cc5ccb1c4a1d8e3d71
Author:     Ben Dooks <[EMAIL PROTECTED]>
AuthorDate: Mon Nov 19 22:28:15 2007 +0000
Committer:  Greg Kroah-Hartman <[EMAIL PROTECTED]>
CommitDate: Wed Nov 28 13:58:36 2007 -0800

    USB: s3c2410 gadget: ensure vbus pin in input mode during read
    Some CPUs in the S3C24XX series do not support readback of the
    value of a pin when the pin has been configured to an IRQ.
    Signed-off-by: Ben Dooks <[EMAIL PROTECTED]>
    Acked-by: David Brownell <[EMAIL PROTECTED]>
    Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
 drivers/usb/gadget/s3c2410_udc.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index 5acadda..4ce050c 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1511,7 +1511,11 @@ static irqreturn_t s3c2410_udc_vbus_irq(int irq, void 
        unsigned int            value;
        dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+       /* some cpus cannot read from an line configured to IRQ! */
+       s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_INPUT);
        value = s3c2410_gpio_getpin(udc_info->vbus_pin);
+       s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_SFN2);
        if (udc_info->vbus_pin_inverted)
                value = !value;
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