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Charger v2 assumes the battery_get_info() always returns non-NULL even if the battery is not detected, for example, in the over-drained situation. Thus, add a new struct so that we know what the conservative setting is to pre-charge the unknown battery. BUG=chrome-os-partner:28112 BRANCH=nyan,big,blaze TEST=See issue tracker for the test procedure. Change-Id: Ica4fe75d154e2f195eb1da19ba045346da383b6c Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/195596 Reviewed-by: Bill Richardson <wfrichar@chromium.org> Reviewed-by: Devin Lu <Devin.Lu@quantatw.com> Tested-by: Devin Lu <Devin.Lu@quantatw.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.