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From dbaryshkov@gmail.com Fri Dec 7 00:05:32 2007
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Date: Fri, 7 Dec 2007 02:05:32 +0300
To: linux-arm-kernel@lists.arm.linux.org.uk
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From: Dmitry Baryshkov <dbaryshkov@gmail.com>
Subject: [PATCH 1/2] pxa2xx_udc_support_inverse_vbus.patch
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Some pxa-based boards (like e.g. tosa) have the VBUS-detection gpio pin
inverted. I.e. it's low when VBUS is connected and high when
disconnected. Allow specifiing whether gpio_vbus value is inverted.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Index: linux-test/drivers/usb/gadget/pxa2xx_udc.c
===================================================================
--- linux-test.orig/drivers/usb/gadget/pxa2xx_udc.c 2007-12-06 12:41:25.784337009 +0300
+++ linux-test/drivers/usb/gadget/pxa2xx_udc.c 2007-12-06 13:39:33.504345084 +0300
@@ -125,8 +125,12 @@ 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;
@@ -1396,6 +1400,9 @@ static irqreturn_t udc_vbus_irq(int irq,
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;
}
Index: linux-test/include/asm-arm/mach/udc_pxa2xx.h
===================================================================
--- linux-test.orig/include/asm-arm/mach/udc_pxa2xx.h 2007-12-06 12:38:49.872349393 +0300
+++ linux-test/include/asm-arm/mach/udc_pxa2xx.h 2007-12-06 12:41:03.594903549 +0300
@@ -22,5 +22,6 @@ struct pxa2xx_udc_mach_info {
*/
u16 gpio_vbus; /* high == vbus present */
u16 gpio_pullup; /* high == pullup activated */
+ unsigned char gpio_vbus_inverted:1;
};
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