tree 624c6b7b2eda351fc603d2d447d4ef66b877aa94
parent 381827e3d92c9e786cd8ebe412586968662fb4be
author David Hendricks <dhendrix@chromium.org> 1418761140 -0800
committer chrome-internal-fetch <chrome-internal-fetch@google.com> 1418770087 +0000

spi: Die if Winbond chip driver gets probed twice

The way we use the SPI API does not allow for multiple chips to be
used simultaneously. This adds a dumb check to see if the chip has
already been probed/initialized, which should only happen once given
the current assumptions.

If we want to support multiple chips simultaneously, we should
further re-factor these chip drivers to be malloc()-friendly in
early stages (Julius suggested suggested implementing a mini-heap).

BUG=none
BRANCH=none
TEST=none (current ToT is broken)

Signed-off-by: David Hendricks <dhendrix@chromium.org>
Change-Id: I27ccbd5d94e00970f3a07c6383ccdce14a09cb60
Reviewed-on: https://chromium-review.googlesource.com/236080
Reviewed-by: Julius Werner <jwerner@chromium.org>