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From DV2 board of pit, we'll use 3 color-LED instead of power LED on keyboard. So, we have to add the function to control 3 color-LED in pmu driver. BUG=chrome-os-partner:24855 TEST=Tested on the pi and pit board about all power status. BRANCH=pit Change-Id: I7b1df39de8fa56eab73779abfa52cf8f72427b44 Signed-off-by: Jaehoon Kim <jh228.kim@samsung.com> Reviewed-on: https://chromium-review.googlesource.com/181588 Tested-by: Katie Roberts-Hoffman <katierh@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Wonjoon Lee <woojoo.lee@samsung.com>
In the most general case, the flash layout looks something like this: +---------------------+ | Reserved for EC use | +---------------------+ +---------------------+ | Vblock B | +---------------------+ | RW firmware B | +---------------------+ +---------------------+ | Vblock A | +---------------------+ | RW firmware A | +---------------------+ +---------------------+ | FMAP | +---------------------+ | Public root key | +---------------------+ | Read-only firmware | +---------------------+ BIOS firmware (and kernel) put the vblock info at the start of each image where it's easy to find. The Blizzard EC expects the firmware vector table to come first, so we have to put the vblock at the end. This means we have to know where to look for it, but that's built into the FMAP and the RO firmware anyway, so that's not an issue. The RO firmware doesn't need a vblock of course, but it does need some reserved space for vboot-related things. Using SHA256/RSA4096, the vblock is 2468 bytes (0x9a4), while the public root key is 1064 bytes (0x428) and the current FMAP is 644 bytes (0x284). If we reserve 4K at the top of each FW image, that should give us plenty of room for vboot-related stuff.