summaryrefslogtreecommitdiff
path: root/drivers/usb
diff options
context:
space:
mode:
authorFelipe Balbi <felipe.balbi@nokia.com>2010-08-11 14:02:32 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-24 07:50:16 +0400
commit461c317705eca5cac09a360f488715927fd0a927 (patch)
tree680ffe25b91adce6638a727657f5898a8d9c4ec1 /drivers/usb
parent7c81aafaf059b81ead2330bc13db78269ef62612 (diff)
downloadlinux-461c317705eca5cac09a360f488715927fd0a927.tar.xz
USB: otg: twl4030: fix wrong assumption of starting state
The reset state of twl4030-usb is not sleeping, it starts up awaken and we need to disable it if we have booted with a disconnected cable to avoid over consumption on the default state. To avoid problems later, we read the current state of the transceiver from the PHY_PWR_CTRL register. The bootloader can, anyways, put the device to sleep before us. Tested on a custom OMAP board. Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/otg/twl4030-usb.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
index 0e8888588d4e..05aaac1c3861 100644
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -550,6 +550,7 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev)
struct twl4030_usb_data *pdata = pdev->dev.platform_data;
struct twl4030_usb *twl;
int status, err;
+ u8 pwr;
if (!pdata) {
dev_dbg(&pdev->dev, "platform_data not available\n");
@@ -568,7 +569,10 @@ static int __devinit twl4030_usb_probe(struct platform_device *pdev)
twl->otg.set_peripheral = twl4030_set_peripheral;
twl->otg.set_suspend = twl4030_set_suspend;
twl->usb_mode = pdata->usb_mode;
- twl->asleep = 1;
+
+ pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
+
+ twl->asleep = (pwr & PHY_PWR_PHYPWD);
/* init spinlock for workqueue */
spin_lock_init(&twl->lock);