diff options
| author | Roman Alyautdin | 2015-10-12 16:14:32 +0200 |
|---|---|---|
| committer | Felipe Balbi | 2015-10-16 17:26:22 +0200 |
| commit | 3bbafac83775425d0abb68cf9837ee3ca36adb42 (patch) | |
| tree | 29d5796303b1fabab257e67c865764cd8e707a26 /drivers/usb/musb/musb_core.c | |
| parent | usb: gadget: loopback: Fix looping back logic implementation (diff) | |
| download | kernel-qcow2-linux-3bbafac83775425d0abb68cf9837ee3ca36adb42.tar.gz kernel-qcow2-linux-3bbafac83775425d0abb68cf9837ee3ca36adb42.tar.xz kernel-qcow2-linux-3bbafac83775425d0abb68cf9837ee3ca36adb42.zip | |
usb: musb: core: add common method of getting vbus status
Fix musb_platform_get_vbus_status return value in case of platform
implementation is not defined, bringing expected behaviour of
musb_platform_get wrapper. Add musb_vbus_show default method to determine
VBUS status in case platform method is not defined.
Signed-off-by: Roman Alyautdin <ralyautdin@dev.rtsoft.ru>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb/musb_core.c')
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index e0e10dd424e0..ba13529cbd52 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1775,13 +1775,20 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf) unsigned long flags; unsigned long val; int vbus; + u8 devctl; spin_lock_irqsave(&musb->lock, flags); val = musb->a_wait_bcon; - /* FIXME get_vbus_status() is normally #defined as false... - * and is effectively TUSB-specific. - */ vbus = musb_platform_get_vbus_status(musb); + if (vbus < 0) { + /* Use default MUSB method by means of DEVCTL register */ + devctl = musb_readb(musb->mregs, MUSB_DEVCTL); + if ((devctl & MUSB_DEVCTL_VBUS) + == (3 << MUSB_DEVCTL_VBUS_SHIFT)) + vbus = 1; + else + vbus = 0; + } spin_unlock_irqrestore(&musb->lock, flags); return sprintf(buf, "Vbus %s, timeout %lu msec\n", |