linux-kernel - RE: [PATCH 1/1] atmel uaba : Adding invert vbus

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Message-ID: <B5E0EDE940845B429B7ECCE186529F2C0641D18303@dware2702>
Date:	Tue, 19 Jan 2010 08:16:26 +0100
From:	Eirik Aanonsen <EAA@...medical.com>
To:	Greg KH <greg@...ah.com>
CC:	"kernel@...32linux.org" <kernel@...32linux.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/1] atmel uaba : Adding invert vbus_pin

...

> > > Please always run your patches through 'scripts/checkpatch.pl'
> before
> > > sending them so that you don't accidentally add coding style
> errors.
> > >
> > > thanks,
> > >
> > > greg k-h
> >
> > Yes I'm sorry I got that feedback from several others as well.
> >
> > That is why I resubmitted the patch on 05.Jan. But under the same
> name, and since then I have not received any feedback on that patch.
> >

...

> 
> I don't see it in my queue, care to resend?
> 
> thanks,
> 
> greg k-h


Adding it here:

---

Thanks to Greg KH [greg@...h.com], Ben Nizette [bn@...sdigital.com] and Sergei Shtylyov [sshtylyov@...mvista.com] for good feedback

Adding vbus_pin_inverted so that the usb detect pin can be active high or low.
This because depending on HW implementation it is better to have active low.
Also replaced the pio_get_value(udc->vbus_pin); with a call to vbus_is_present(udc);
This change allows avr32 designes with vbus pin inverted to save 0,15watt when disconnected from a host.

Signed-off-by: Eirik Aanonsen <eaa@...medical.com>
---
 drivers/usb/gadget/atmel_usba_udc.c |    6 +++---
 drivers/usb/gadget/atmel_usba_udc.h |    1 +
 include/linux/usb/atmel_usba_udc.h  |    1 +
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 4e970cf..e1282fc 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -320,8 +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 +1762,7 @@ 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 +1999,7 @@ 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;
 
diff --git a/include/linux/usb/atmel_usba_udc.h b/include/linux/usb/atmel_usba_udc.h
index 6311fa2..643c4c5 100644
--- a/include/linux/usb/atmel_usba_udc.h
+++ b/include/linux/usb/atmel_usba_udc.h
@@ -15,6 +15,7 @@ struct usba_ep_data {
 
 struct usba_platform_data {
 	int			vbus_pin;
+	unsigned char vbus_pin_inverted;
 	int			num_ep;
 	struct usba_ep_data	ep[0];
 };
--
1.5.4.3

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