diff options
| author | Wei-Ning Huang <wnhuang@google.com> | 2017-07-24 14:34:55 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-07-27 04:22:42 -0700 |
| commit | b9c8dcb9f6b113d35f9da7a218df0507d4a492c2 (patch) | |
| tree | e5ebec26f978df8689faf2ae12b9eeca51231bb0 /include/flash.h | |
| parent | 381fc5912c6b528c5dbc4509feeade07a1332694 (diff) | |
| download | chrome-ec-b9c8dcb9f6b113d35f9da7a218df0507d4a492c2.tar.gz | |
flash: add flash selection support
Some chips require special operations before flash can be accessed
(read, write, erase), without it the flash operations could be
corrupted. The chip that requires this should enable the
CONFIG_FLASH_SELECT_REQUIRED config, which exposes
EC_FLASH_INFO_SELECT_REQUIRED in flashinfo flags. Before any flash
operations is executed on the chip, EC_CMD_FLASH_SELECT should be issued
to notify the chip to prepare for the flash operations.
BRANCH=none
BUG=b:63685022
TEST=with depended CLs, touchpad interrupt should be disabled when
flashrom is in progress.
CQ-DEPEND=CL:*416548
Change-Id: I96455adbe739d5f924edf382a2752404a7c5ad04
Signed-off-by: Wei-Ning Huang <wnhuang@google.com>
Reviewed-on: https://chromium-review.googlesource.com/582374
Commit-Ready: Wei-Ning Huang <wnhuang@chromium.org>
Tested-by: Wei-Ning Huang <wnhuang@chromium.org>
Reviewed-by: Wei-Ning Huang <wnhuang@chromium.org>
Diffstat (limited to 'include/flash.h')
| -rw-r--r-- | include/flash.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/flash.h b/include/flash.h index cdd8148d03..2637f9066c 100644 --- a/include/flash.h +++ b/include/flash.h @@ -342,4 +342,14 @@ void flash_lock_mapped_storage(int lock); #else static inline void flash_lock_mapped_storage(int lock) { }; #endif /* CONFIG_EXTERNAL_STORAGE */ + +/** + * Select flash for performing flash operations. Board should implement this + * if some steps needed be done before flash operation can succeed. + * + * @param select 1 to select flash, 0 to deselect (disable). + * @return EC_RES_* status code. + */ +int board_flash_select(int select); + #endif /* __CROS_EC_FLASH_H */ |