tree e776c41fa00a19ac327744e957cbe8b8567a2b29
parent 6579c76d990267484e1ceebfbdd47604a0a7c013
author Jeremy Kerr <jk@ozlabs.org> 1561357359 +0800
committer Jeremy Kerr <jk@ozlabs.org> 1561357769 +0800

astlpc: add a dummy KCS data write for KCS status updates

Some hardware KCS implementations may not trigger an interrupt when only
the status register is written. To handle these, we perform a write to
the data register too, using a protocol-defined dummy value of 0xff.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Change-Id: I4ce000e378e98b1fc1414b5ce500724540853b50