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>
1 file changed
