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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>
This commit is contained in:
Eirik Aanonsen 2010-02-05 09:49:25 +01:00 committed by Greg Kroah-Hartman
parent 90f7976880
commit 640e95abdf
4 changed files with 10 additions and 4 deletions
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7
arch/avr32/mach-at32ap/at32ap700x.c
View File

@ -1770,10 +1770,13 @@ at32_add_device_usba(unsigned int id, struct usba_platform_data *data)
ARRAY_SIZE(usba0_resource)))
goto out_free_pdev;
if (data)
if (data) {
usba_data.pdata.vbus_pin = data->vbus_pin;
else
usba_data.pdata.vbus_pin_inverted = data->vbus_pin_inverted;
} else {
usba_data.pdata.vbus_pin = -EINVAL;
usba_data.pdata.vbus_pin_inverted = -EINVAL;
}
data = &usba_data.pdata;
data->num_ep = ARRAY_SIZE(at32_usba_ep);

5
drivers/usb/gadget/atmel_usba_udc.c
View File

@ -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,

1
drivers/usb/gadget/atmel_usba_udc.h
View File

@ -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;

1
include/linux/usb/atmel_usba_udc.h
View File

@ -15,6 +15,7 @@ struct usba_ep_data {
struct usba_platform_data {
int vbus_pin;
int vbus_pin_inverted;
int num_ep;
struct usba_ep_data ep[0];
};