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In some cases, the virtual battery code creates transactions that violate SB spec. One example: If the host command is structured as two messages - a write to 0x03 (reg addr), followed by two bytes of write data, the first byte of the second message (write data) will be sent to virtual_battery_read(), as if it were a reg read request. Let's do the following change for virtual battery: 1. Parse the command more carefully with state machines. 2. Support write caching for some critical registers. 3. Cache more attributes (0x03 and 0x0f). BUG=chrome-os-partner:59239, chromium:659819 BRANCH=none TEST='power_supply_info' works on kevin Change-Id: Icdeb12b21f0dc3c329f29b206b7b9395ca4c9998 Reviewed-on: https://chromium-review.googlesource.com/407987 Commit-Ready: Philip Chen <philipchen@chromium.org> Tested-by: Philip Chen <philipchen@chromium.org> Reviewed-by: Shawn N <shawnn@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly