tree 85420040088667c4bb25ee7cb41ca18447b6f0fb
parent 31912b61a7c19515f5f5decae8ccad7b8e42f4cf
author Aaron Durbin <adurbin@chromium.org> 1386720330 -0800
committer chrome-internal-fetch <chrome-internal-fetch@google.com> 1386791439 +0000

crossystem: handle BayTrail gpios

BayTrail systems have 3 banks of gpios. Therefore,
the Linux kernel exposes these 3 banks as 3 gpiochip
entries. The kernel driver expects the 3 banks to be
exposed with specific UIDs associated with a specific
banks. ChromeOS firmware maps gpios within a given
bank using the bank's MMIO offset. In summary:

Bank Type | UID | Offset
----------+-----+-------
 SCORE    |  1  | 0x0000
 NCORE    |  2  | 0x1000
 SUS      |  3  | 0x2000

BUG=chrome-os-partner:24408
BUG=chrome-os-partner:24324
BRANCH=None
TEST=Built. 'crossystem wpsw_cur' works correctly.

Change-Id: I251f86285ce9733f7ca90ed1ebef536f4fe5c07c
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/179513
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>