From: Felipe Balbi <[email protected]> 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 <[email protected]> --- Greg, this is a bugfix but it's not a huge one, so if want to wait until next merge window, it's fine by me. This patch saves about 2mA for the case when we boot with the USB cable disconnected. 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 0e88885..05aaac1 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); -- 1.7.2.1.6.g61bf12 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
