Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5f629ad7e5f9b99c6d025bf199d402734bd72d0f
Commit: 5f629ad7e5f9b99c6d025bf199d402734bd72d0f
Parent: 8802bca4feed9e60d22a91cc5ccb1c4a1d8e3d71
Author: Ben Dooks <[EMAIL PROTECTED]>
AuthorDate: Mon Nov 19 22:28:15 2007 +0000
Committer: Greg Kroah-Hartman <[EMAIL PROTECTED]>
CommitDate: Wed Nov 28 13:58:36 2007 -0800
USB: s3c2410 gadget: ensure vbus pin in input mode during read
Some CPUs in the S3C24XX series do not support readback of the
value of a pin when the pin has been configured to an IRQ.
Signed-off-by: Ben Dooks <[EMAIL PROTECTED]>
Acked-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
drivers/usb/gadget/s3c2410_udc.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index 5acadda..4ce050c 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1511,7 +1511,11 @@ static irqreturn_t s3c2410_udc_vbus_irq(int irq, void
*_dev)
unsigned int value;
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+
+ /* some cpus cannot read from an line configured to IRQ! */
+ s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_INPUT);
value = s3c2410_gpio_getpin(udc_info->vbus_pin);
+ s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_SFN2);
if (udc_info->vbus_pin_inverted)
value = !value;
-
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