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eb14066447
Adding in support for accelerometer interrupt for use currently in clapper and glimmer. This is disabled by default and can be enabled with CONFIG_ACCEL_INTERRUPTS. BUG=none BRANCH=rambi TEST=Manual test on a glimmer using accelint console command. On console enter: accelint 0 32 When you tap the lid, it should fire the interrupt and print msg to console. accelint 1 32 Tap the base and it will fire another interrupt. Change-Id: Iaab324945e34d527140399ec4f06efd812a62840 Original-Change-Id: I0329112fdcae3c8adc0ca07e74fef7a591d4b9a1 Signed-off-by: Alec Berg <alecaberg@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/190099 Reviewed-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/191549
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.