diff options
| author | Andreas Kemnade <andreas@kemnade.info> | 2018-02-20 16:30:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-26 12:02:02 +0300 |
| commit | 43de32cdf0f4f73519e2df12fb93adc24f9746cb (patch) | |
| tree | f623f4b765f5008246bf574cb8e675094a15acdc /drivers/usb/musb | |
| parent | 829239740c129fe9aaf276843fd546bdd45f114e (diff) | |
| download | linux-43de32cdf0f4f73519e2df12fb93adc24f9746cb.tar.xz | |
usb: musb: fix enumeration after resume
commit 17539f2f4f0b7fa906b508765c8ada07a1e45f52 upstream.
On dm3730 there are enumeration problems after resume.
Investigation led to the cause that the MUSB_POWER_SOFTCONN
bit is not set. If it was set before suspend (because it
was enabled via musb_pullup()), it is set in
musb_restore_context() so the pullup is enabled. But then
musb_start() is called which overwrites MUSB_POWER and
therefore disables MUSB_POWER_SOFTCONN, so no pullup is
enabled and the device is not enumerated.
So let's do a subset of what musb_start() does
in the same way as musb_suspend() does it. Platform-specific
stuff it still called as there might be some phy-related stuff
which needs to be enabled.
Also interrupts are enabled, as it was the original idea
of calling musb_start() in musb_resume() according to
Commit 6fc6f4b87cb3 ("usb: musb: Disable interrupts on suspend,
enable them on resume")
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index ff5a1a8989d5..4f0d937bf0e5 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -2733,7 +2733,8 @@ static int musb_resume(struct device *dev) if ((devctl & mask) != (musb->context.devctl & mask)) musb->port1_status = 0; - musb_start(musb); + musb_enable_interrupts(musb); + musb_platform_enable(musb); spin_lock_irqsave(&musb->lock, flags); error = musb_run_resume_work(musb); |