diff options
| author | Ben Dooks <ben-linux@fluff.org> | 2007-11-19 22:28:15 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-11-28 13:58:36 -0800 |
| commit | 5f629ad7e5f9b99c6d025bf199d402734bd72d0f (patch) | |
| tree | 099257b25ef362f133f52739a9d3afc33793e6cd /drivers/usb/gadget/s3c2410_udc.c | |
| parent | 8802bca4feed9e60d22a91cc5ccb1c4a1d8e3d71 (diff) | |
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 <ben-linux@fluff.org>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget/s3c2410_udc.c')
| -rw-r--r-- | 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 5acaddabbe8f..4ce050c3d13f 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 *_dev) 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; |