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| author | Dmitry Baryshkov <dbaryshkov@gmail.com> | 2007-12-06 18:18:03 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-01 14:34:57 -0800 |
| commit | d4a8d46d9129fbb26b4c2d3143b1b0975a9b4ae4 (patch) | |
| tree | c8f3df6259f2a2cbcffe559f29fc065c8adcc856 | |
| parent | 26e109b0a90b5ef7b025e44a969836ab9a598ffc (diff) | |
| download | kernel_samsung_smdk4412-d4a8d46d9129fbb26b4c2d3143b1b0975a9b4ae4.zip kernel_samsung_smdk4412-d4a8d46d9129fbb26b4c2d3143b1b0975a9b4ae4.tar.gz kernel_samsung_smdk4412-d4a8d46d9129fbb26b4c2d3143b1b0975a9b4ae4.tar.bz2 | |
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>
| -rw-r--r-- | drivers/usb/gadget/pxa2xx_udc.c | 9 | ||||
| -rw-r--r-- | include/asm-arm/mach/udc_pxa2xx.h | 2 |
2 files changed, 9 insertions, 2 deletions
diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c index 4abf9d2..8bd9ce2 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; } diff --git a/include/asm-arm/mach/udc_pxa2xx.h b/include/asm-arm/mach/udc_pxa2xx.h index ff0a957..f191e14 100644 --- a/include/asm-arm/mach/udc_pxa2xx.h +++ b/include/asm-arm/mach/udc_pxa2xx.h @@ -19,7 +19,9 @@ struct pxa2xx_udc_mach_info { * with on-chip GPIOs not Lubbock's wierd hardware, can have a sane * VBUS IRQ and omit the methods above. Store the GPIO number * here; for GPIO 0, also mask in one of the pxa_gpio_mode() bits. + * Note that sometimes the signals go through inverters... */ + bool gpio_vbus_inverted; u16 gpio_vbus; /* high == vbus present */ u16 gpio_pullup; /* high == pullup activated */ }; |