diff options
| author |   Felipe Balbi <felipe.balbi@nokia.com> | 2010-08-11 13:02:32 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-23 20:50:16 -0700 |
| commit | 461c317705eca5cac09a360f488715927fd0a927 (patch) | |
| tree | 680ffe25b91adce6638a727657f5898a8d9c4ec1 /drivers | |
| parent | USB: gadget: Return -ENOMEM on memory allocation failure (diff) | |
| download | linux-dev-461c317705eca5cac09a360f488715927fd0a927.tar.xz linux-dev-461c317705eca5cac09a360f488715927fd0a927.zip | |
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')
| -rw-r--r-- | drivers/usb/otg/twl4030-usb.c | 6 |
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); |