diff options
| author | Dmitry Baryshkov <dbaryshkov@gmail.com> | 2007-12-07 03:18:03 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-01 23:34:57 +0100 |
| commit | d4a8d46d9129fbb26b4c2d3143b1b0975a9b4ae4 (patch) | |
| tree | c8f3df6259f2a2cbcffe559f29fc065c8adcc856 /drivers | |
| parent | USB: testing driver: don't free a locked mutex (diff) | |
| download | linux-d4a8d46d9129fbb26b4c2d3143b1b0975a9b4ae4.tar.xz linux-d4a8d46d9129fbb26b4c2d3143b1b0975a9b4ae4.zip | |
USB: gadget: pxa2xx_udc supports inverted vbus
Some boards (like e.g. Tosa) invert the VBUS-detection signal:
it's low when a host is supplying VBUS, and high otherwise.
Allow specifying whether gpio_vbus value is inverted.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/gadget/pxa2xx_udc.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c index 4abf9d26d615..8bd9ce26bd95 100644 --- a/drivers/usb/gadget/pxa2xx_udc.c +++ b/drivers/usb/gadget/pxa2xx_udc.c @@ -127,8 +127,10 @@ static int is_vbus_present(void) { struct pxa2xx_udc_mach_info *mach = the_controller->mach; - if (mach->gpio_vbus) - return gpio_get_value(mach->gpio_vbus); + if (mach->gpio_vbus) { + int value = gpio_get_value(mach->gpio_vbus); + return mach->gpio_vbus_inverted ? !value : value; + } if (mach->udc_is_connected) return mach->udc_is_connected(); return 1; @@ -1398,6 +1400,9 @@ static irqreturn_t udc_vbus_irq(int irq, void *_dev) struct pxa2xx_udc *dev = _dev; int vbus = gpio_get_value(dev->mach->gpio_vbus); + if (dev->mach->gpio_vbus_inverted) + vbus = !vbus; + pxa2xx_udc_vbus_session(&dev->gadget, vbus); return IRQ_HANDLED; } |