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author | Andreas Kemnade <andreas@kemnade.info> | 2018-02-20 07:30:10 -0600 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-20 15:02:46 +0100 |
commit | 17539f2f4f0b7fa906b508765c8ada07a1e45f52 (patch) | |
tree | 0f9396e4daf484cbf0842cd50aa9fe690646fcc8 /README | |
parent | fc19b1d09414912a327cf0a4b5ba2050ac7ad59d (diff) |
usb: musb: fix enumeration after resume
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 'README')
0 files changed, 0 insertions, 0 deletions