tree e69149ae8ed78ff3b51ad54523147890d6d4447e
parent a3e22d36acf633504694288a3e589bec6094c03b
author Raul E Rangel <rrangel@chromium.org> 1560376743 -0600
committer Commit Bot <commit-bot@chromium.org> 1560879851 +0000

drivers/storage/bayhub: Add support for eMMC tuning

The Bayhub part has support for hardware tuning, but it only supports it
at 4 bits.

I added a new sdhci_send_tuning_cmd because sdhci_send_command_bounced
requires a data buffer, sets up DMA and waits for a different interrupt
then the tuning command returns. Instead of adding a bunch of
conditionals to sdhci_send_tuning_cmd, I added a new function.

BRANCH=grunt
BUG=b:122244718
TEST=Verified it compiles on grunt

Change-Id: I19ef97b474d1597a55136aa55d4f3e4f992938b9
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/depthcharge/+/1655552
Reviewed-by: Julius Werner <jwerner@chromium.org>