tree 0bdfddd642e2455e34ece3a5551038a470db61f1
parent 515ba29cd7b571da45365e4db80c1b6905869ef3
author Sebastian Andrzej Siewior <bigeasy@linutronix.de> 1351623145 +0100
committer Felipe Balbi <balbi@ti.com> 1351689723 +0200

usb: musb: Perform only write access on MUSB_INTRRXE

This is part of the workaround for AM35x advisory Advisory 1.1.20.
The advisory says that the IPSS bridge can't handle 8 & 16 bit read
access. An 16bit read access to MUSB_INTRRXE results in an 32bit read
access which also reads INTRUSB and therefore may lose interrupts.
This patch uses a shadow register of MUSB_INTRRXE so we only perform
write access to it.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>