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authorEirik Aanonsen <EAA@wprmedical.com>2010-02-05 08:49:25 (GMT)
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-02 22:54:57 (GMT)
commit640e95abdfae9fef5949084c92e80c8f2f8b5ec5 (patch)
treef8cb60315b5b362b53777c0e11650e681c9c3b65 /drivers/usb/gadget
parent90f7976880bbbf9968629500972f8e2f80401217 (diff)
downloadlinux-640e95abdfae9fef5949084c92e80c8f2f8b5ec5.tar.xz
USB: atmel uaba: Adding invert vbus_pin
Adding vbus_pin_inverted so that the usb detect pin can be active high or low depending on HW implementation also replaced the gpio_get_value(udc->vbus_pin); with a call to vbus_is_present(udc); This allows the driver to be loaded and save about 0,15W on the consumption. Signed-off-by: Eirik Aanonsen <eaa@wprmedical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r--drivers/usb/gadget/atmel_usba_udc.c5
-rw-r--r--drivers/usb/gadget/atmel_usba_udc.h1
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 976822f..f79bdfe 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -320,7 +320,7 @@ static inline void usba_cleanup_debugfs(struct usba_udc *udc)
static int vbus_is_present(struct usba_udc *udc)
{
if (gpio_is_valid(udc->vbus_pin))
- return gpio_get_value(udc->vbus_pin);
+ return gpio_get_value(udc->vbus_pin) ^ udc->vbus_pin_inverted;
/* No Vbus detection: Assume always present */
return 1;
@@ -1763,7 +1763,7 @@ static irqreturn_t usba_vbus_irq(int irq, void *devid)
if (!udc->driver)
goto out;
- vbus = gpio_get_value(udc->vbus_pin);
+ vbus = vbus_is_present(udc);
if (vbus != udc->vbus_prev) {
if (vbus) {
toggle_bias(1);
@@ -2000,6 +2000,7 @@ static int __init usba_udc_probe(struct platform_device *pdev)
if (gpio_is_valid(pdata->vbus_pin)) {
if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
udc->vbus_pin = pdata->vbus_pin;
+ udc->vbus_pin_inverted = pdata->vbus_pin_inverted;
ret = request_irq(gpio_to_irq(udc->vbus_pin),
usba_vbus_irq, 0,
diff --git a/drivers/usb/gadget/atmel_usba_udc.h b/drivers/usb/gadget/atmel_usba_udc.h
index f7baea3..88a2e07 100644
--- a/drivers/usb/gadget/atmel_usba_udc.h
+++ b/drivers/usb/gadget/atmel_usba_udc.h
@@ -323,6 +323,7 @@ struct usba_udc {
struct platform_device *pdev;
int irq;
int vbus_pin;
+ int vbus_pin_inverted;
struct clk *pclk;
struct clk *hclk;