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| author | Max Filippov <jcmvbkbc@gmail.com> | 2013-12-25 16:01:30 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-08 04:15:39 +0400 |
| commit | 8f668fbbd571bbd5187a9a0eae150b768fc388ac (patch) | |
| tree | 3def8b18a00f20ce2ea41acd3f831450ac982ac7 /drivers/usb/c67x00/c67x00-sched.c | |
| parent | 543d7784b07ffd16cc82a9cb4e1e0323fd0040f1 (diff) | |
| download | linux-8f668fbbd571bbd5187a9a0eae150b768fc388ac.tar.xz | |
USB: c67x00: add proper delays to HPI read/write
According to CY7C67300 specification HPI read and write cycle duration
Tcyc must be at least 6T long, where T is 1/48MHz, which is 125ns.
Without this delay fast host processor cannot write to chip registers.
Add proper ndelay to hpi_{read,write}_reg.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/c67x00/c67x00-sched.c')
0 files changed, 0 insertions, 0 deletions